using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Design;
using System.Drawing.Drawing2D;
using System.Globalization;
using System.Text;
using System.Text.RegularExpressions;
using DevComponents.DotNetBar.Charts.Style;

namespace DevComponents.DotNetBar.Charts
{
    /// <summary>
    /// Represents the collection of ChartSeries.
    /// </summary>
    [Editor("DevComponents.Charts.Design.ChartSeriesCollectionEditor, DevComponents.Charts.Design, " +
            "Version=14.1.0.37, Culture=neutral,  PublicKeyToken=90f470f34c89ccaf", typeof(UITypeEditor))]
    public class ChartSeriesCollection : CustomNamedCollection<ChartSeries>
    {
        #region GetUniqueName

        public string GetUniqueName()
        {
            return (GetUniqueName("Series"));
        }

        #endregion
    }

    public class ChartSeries : BaseSeries
    {
        #region Constants

        private const int StockHigh = 0;
        private const int StockLow = 1;
        private const int StockClose = 2;
        private const int StockOpen = 3;
        private const int StockMedian = 4;

        #endregion

        #region Private variables

        private States _States;

        private SeriesPointCollection _SeriesPoints;

        private PointData _PointData;
        private PointData _EmptyPointData;
        private PointData _StepPointData;

        private ChartAxis _AxisX;
        private ChartAxis _AxisY;

        private int _BarOffset;
        private int _BarWidth;
        private double _BarWidthRatio;

        private Tbool _BarShadingEnabled = Tbool.NotSet;
        private BarFillRange _BarFillRange = BarFillRange.NotSet;
        private BarLabelPosition _BarLabelPosition = BarLabelPosition.NotSet;

        private Color[] _BarShadingColors;

        private ChartSeriesVisualStyle _ChartSeriesVisualStyle;
        private EffectiveStyle<ChartSeriesVisualStyle> _EffectiveChartSeriesStyle;

        private DataLabelVisualStyle _DataLabelVisualStyle;
        private EffectiveStyle<DataLabelVisualStyle> _EffectiveDataLabelStyle;

        private Tbool _CrosshairEnabled = Tbool.NotSet;
        private Tbool _CrosshairHighlightPoints = Tbool.NotSet;
        private Tbool _CrosshairHighlightSinglePoint = Tbool.NotSet;
        private Tbool _CrosshairShowLabels = Tbool.NotSet;

        private ScaleType _ScaleTypeX = ScaleType.NotSet;
        private ScaleType _ScaleTypeY = ScaleType.NotSet;
        private ScaleType _ActualScaleTypeX = ScaleType.NotSet;
        private ScaleType _ActualScaleTypeY = ScaleType.NotSet;

        private object _MinValueX;
        private object _MinValueY;

        private object _MaxValueX;
        private object _MaxValueY;

        private object _AreaBaseValue;

        private SortedSeriesPoints _SortedSeriesPoints;
        private object[] _EmptyValues;

        private List<object> _QualitativeXValues;
        private List<object> _QualitativeYValues;

        private PointMarker _PointMarker;
        private Image _PointMarkerImage;
        private Image _PointMarkerEmptyImage;
        private Image _PointMarkerHighlightImage;
        private Point _PointOffset;

        private int _GroupId;
        private object _PlotData;
        private double _DotPlotIndexValue = 1.0d;

        private ChartIndicatorCollection _ChartIndicators;
        private Point[] _ConvexHullPoints;

        private double _BubbleScaleFactor = 1.0d;
        private double _BubbleMaxPercentage = .25d;
        private int _BubbleMinSize = 4;

        private BubbleSizeMode _BubbleSizeMode = BubbleSizeMode.NotSet;
        private BubbleIntensityMode _BubbleIntensityMode = BubbleIntensityMode.NotSet;
        private ChartLineDisplayMode _ChartLineDisplayMode = ChartLineDisplayMode.NotSet;
        private ChartLineAreaDisplayMode _ChartLineAreaDisplayMode = ChartLineAreaDisplayMode.NotSet;
        private ConvexHullDisplayMode _ConvexHullDisplayMode = ConvexHullDisplayMode.NotSet;
        private PointLabelDisplayMode _PointLabelDisplayMode = PointLabelDisplayMode.NotSet;

        private StepLines _StepLines = StepLines.NotSet;
        private StepLineMode _StepLineMode = StepLineMode.NotSet;
        private StepLineMode _LastStepLineMode = StepLineMode.NotSet;

        private DataLabelCollection _DataLabels;
        private int _PointLabelSkip;
        private int _PointLabelMinDistance;

        private HiLoBarType _HiLoBarType = HiLoBarType.Box;

        #endregion

        #region Constructors

        public ChartSeries()
            : this(null, SeriesType.Point)
        {
        }

        public ChartSeries(string name)
            : this(name, SeriesType.Point)
        {
        }

        public ChartSeries(SeriesType seriesType)
            : this(null, seriesType)
        {
        }

        public ChartSeries(string name, SeriesType seriesType)
        {
            Name = name;
            SeriesType = seriesType;

            InitDefaultStates();

            _EffectiveChartSeriesStyle = new EffectiveStyle<ChartSeriesVisualStyle>(this);
            _EffectiveDataLabelStyle = new EffectiveStyle<DataLabelVisualStyle>(this);
        }

        #endregion

        #region InitDefaultStates

        private void InitDefaultStates()
        {
            SetState(States.ShowInLegend, true);
            SetState(States.ShowInParentLegend, true);
            SetState(States.ShowCheckBoxInLegend, true);
            SetState(States.ShowMarkerInLegend, true);
            SetState(States.CheckedInLegend, true);
            SetState(States.DisplayLinePointsOnTop, true);
            SetState(States.StackQualitativePoints, true);
            SetState(States.ShowOriginValueLabels, true);
            SetState(States.ShowInnerRingsEx, true);
        }

        #endregion

        #region Public properties

        #region ActualScaleTypeX

        ///<summary>
        /// Gets the Actual X axis Scale Type (may be
        /// different than XScaleType when XScaleType is 'Auto').
        ///</summary>
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public ScaleType ActualScaleTypeX
        {
            get
            {
                if (IsRotated == false)
                    return (_ActualScaleTypeX);

                return (_ActualScaleTypeY);
            }

            internal set { _ActualScaleTypeX = value; }
        }

        #endregion

        #region ActualScaleTypeY

        ///<summary>
        /// Gets the Actual Y axis Scale Type (may be
        /// different than YScaleType when YScaleType is 'Auto').
        ///</summary>
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public ScaleType ActualScaleTypeY
        {
            get
            {
                if (IsRotated == true)
                    return (_ActualScaleTypeX);

                return (_ActualScaleTypeY);
            }

            internal set { _ActualScaleTypeY = value; }
        }

        #endregion

        #region AreaBaseValue

        ///<summary>
        /// Gets or sets the base, reference value for displaying Line/Spline/Step Areas.
        ///</summary>
        [DefaultValue(null), Category("Data")]
        [Description("Indicates the base, reference value for displaying Line/Spline/Step Areas.")]
        [TypeConverter("DevComponents.Charts.Design.PointValueConverter," +
            "DevComponents.Charts.Design, Version=14.1.0.37, Culture=neutral, PublicKeyToken=90f470f34c89ccaf")]
        public object AreaBaseValue
        {
            get { return (_AreaBaseValue); }

            set
            {
                if (value != _AreaBaseValue)
                {
                    _AreaBaseValue = value;

                    OnPropertyChangedEx("AreaBaseValue", Style.VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region AxisX

        /// <summary>
        /// Gets a reference to the X-Axis associated with the series.
        /// </summary>
        [Category("Axis"), DefaultValue(null)]
        [Description("Indicates the reference to the X-Axis associated with the series.")]
        [TypeConverter(typeof(AxisTypeConverter))]
        [Editor("DevComponents.Charts.Design.AxisListTypeEditor, DevComponents.Charts.Design, " +
                "Version=14.1.0.37, Culture=neutral,  PublicKeyToken=90f470f34c89ccaf", typeof(UITypeEditor))]
        public ChartAxis AxisX
        {
            get { return (_AxisX); }

            set
            {
                if (value != _AxisX)
                {
                    ChartXy chartXy = Parent as ChartXy;

                    if (value != null)
                    {
                        if (value.IsPrimaryAxis == false)
                        {
                            if (chartXy != null)
                            {
                                if (chartXy.AncillaryAxesX.Contains(value) == false)
                                {
                                    throw new Exception("Cannot set the series XAxis. The axis is not primary " +
                                        "or a member of the chart's AncillaryAxesX collection.");
                                }
                            }
                        }
                    }

                    if (_AxisX != null)
                    {
                        _AxisX.SeriesRangeChanged = true;
                        _AxisX.PropertyChanged -= AxisX_PropertyChanged;
                    }
                    else
                    {
                        if (chartXy != null)
                            chartXy.AxisX.SeriesRangeChanged = true;
                    }

                    _AxisX = value;

                    if (_AxisX != null)
                    {
                        _AxisX.SeriesRangeChanged = true;
                        _AxisX.PropertyChanged += AxisX_PropertyChanged;
                    }
                    else
                    {
                        if (chartXy != null)
                            chartXy.AxisX.SeriesRangeChanged = true;
                    }

                    OnPropertyChangedEx("AxisX", VisualChangeType.Layout);
                }
            }
        }

        void AxisX_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            InvalidateLayout();
        }

        #endregion

        #region AxisY

        /// <summary>
        /// Gets a reference to the Y-Axis associated with the series.
        /// </summary>
        [Category("Axis"), DefaultValue(null)]
        [Description("Indicates the reference to the Y-Axis associated with the series.")]
        [Editor("DevComponents.Charts.Design.AxisListTypeEditor, DevComponents.Charts.Design, " +
                "Version=14.1.0.37, Culture=neutral,  PublicKeyToken=90f470f34c89ccaf", typeof(UITypeEditor))]
        public ChartAxis AxisY
        {
            get { return (_AxisY); }

            set
            {
                if (value != _AxisY)
                {
                    ChartXy chartXy = Parent as ChartXy;

                    if (value != null)
                    {
                        if (value.IsPrimaryAxis == false)
                        {
                            if (chartXy != null)
                            {
                                if (chartXy.AncillaryAxesY.Contains(value) == false)
                                {
                                    throw new Exception("Cannot set the series YAxis. The axis is not primary " +
                                        "or a member of the chart's AncillaryAxesY collection.");
                                }
                            }
                        }
                    }

                    if (_AxisY != null)
                    {
                        _AxisY.SeriesRangeChanged = true;
                        _AxisY.PropertyChanged -= AxisY_PropertyChanged;
                    }
                    else
                    {
                        if (chartXy != null)
                            chartXy.AxisY.SeriesRangeChanged = true;
                    }

                    _AxisY = value;

                    if (_AxisY != null)
                    {
                        _AxisY.SeriesRangeChanged = true;
                        _AxisY.PropertyChanged += AxisY_PropertyChanged;
                    }
                    else
                    {
                        if (chartXy != null)
                            chartXy.AxisY.SeriesRangeChanged = true;
                    }

                    OnPropertyChangedEx("AxisY", VisualChangeType.Layout);
                }
            }
        }

        void AxisY_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            InvalidateLayout();
        }

        #endregion

        #region BarFillRange

        /// <summary>
        /// Gets or sets how series bars are filled (either according to
        /// each individual bar range, or the entire series range).
        /// </summary>
        [DefaultValue(BarFillRange.NotSet), Category("Bar Display")]
        [Description("Indicates how series bars are filled (either according to each individual bar range, or the entire series range).")]
        public BarFillRange BarFillRange
        {
            get { return (_BarFillRange); }

            set
            {
                if (value != _BarFillRange)
                {
                    _BarFillRange = value;

                    OnPropertyChangedEx("BarFillRange", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region BarLabelPosition

        /// <summary>
        /// Gets or sets the position of bar series labels (default is Center).
        /// </summary>
        [DefaultValue(BarLabelPosition.NotSet), Category("Bar Display")]
        [Description("Indicates the position of bar series labels (default is Center).")]
        public BarLabelPosition BarLabelPosition
        {
            get { return (_BarLabelPosition); }

            set
            {
                if (value != _BarLabelPosition)
                {
                    _BarLabelPosition = value;

                    OnPropertyChangedEx("BarLabelPosition", VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region BarShadingEnabled

        ///<summary>
        /// Gets or sets whether Bar shading is enabled for Horizontal and Vertical Bar series.
        ///</summary>
        [DefaultValue(Tbool.NotSet), Category("Bar Display")]
        [Description("Indicates whether Bar shading is enabled for Horizontal and Vertical Bar series.")]
        public Tbool BarShadingEnabled
        {
            get { return (_BarShadingEnabled); }

            set
            {
                if (value != _BarShadingEnabled)
                {
                    _BarShadingEnabled = value;

                    OnPropertyChangedEx("BarShadingEnabled", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region BarWidthRatio

        /// <summary>
        /// Gets or sets the ratio of bar width to bar spacing within
        /// the same series (defaults to 2 - bar is twice as wide as spacing).
        /// </summary>
        [DefaultValue(0d), Category("Bar Display")]
        [Description("Indicates the ratio of bar width to bar spacing within the same series (defaults to 2 - bar is twice as wide as spacing).")]
        public double BarWidthRatio
        {
            get { return (_BarWidthRatio); }

            set
            {
                if (value != _BarWidthRatio)
                {
                    if (value < 0)
                        throw new ArgumentException("Value must be > 0");

                    _BarWidthRatio = value;

                    OnPropertyChangedEx("BarWidthRatio", VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region BubbleIntensityMode

        /// <summary>
        /// Gets or sets the mode used to determine bubble intensities.
        /// </summary>
        [DefaultValue(BubbleIntensityMode.NotSet), Category("Display")]
        [Description("Indicates the mode used to determine bubble intensities.")]
        public BubbleIntensityMode BubbleIntensityMode
        {
            get { return (_BubbleIntensityMode); }

            set
            {
                if (value != _BubbleIntensityMode)
                {
                    _BubbleIntensityMode = value;

                    OnPropertyChangedEx("BubbleIntensityMode", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region BubbleMaxPercentage

        /// <summary>
        /// Gets or sets the max percentage of the display
        /// area used to calculate series bubble sizes (default is .25).
        /// </summary>
        [DefaultValue(0.25d), Category("Display")]
        [Description("Indicates the max percentage of the display area used to calculate series bubble sizes (default is .25).")]
        public double BubbleMaxPercentage
        {
            get { return (_BubbleMaxPercentage); }

            set
            {
                if (value != _BubbleMaxPercentage)
                {
                    if (value <= 0 || value > 1)
                        throw new ArgumentException("Value must be between 0 and 1");

                    _BubbleMaxPercentage = value;

                    OnPropertyChangedEx("BubbleMaxPercentage", VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region BubbleMinSize

        /// <summary>
        /// Gets or sets the minimum series bubble size (in pixels) Default is 4.
        /// </summary>
        [DefaultValue(4), Category("Display")]
        [Description("Indicates the minimum series bubble size (in pixels). Default is 4.")]
        public int BubbleMinSize
        {
            get { return (_BubbleMinSize); }

            set
            {
                if (value != _BubbleMinSize)
                {
                    if (value < 0)
                        throw new ArgumentException("Value must be > 0");

                    _BubbleMinSize = value;

                    OnPropertyChangedEx("BubbleMinSize", VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region BubbleScaleFactor

        /// <summary>
        /// Gets or sets the Scale Factor used to calculate series bubble sizes.
        /// </summary>
        [DefaultValue(1.0d), Category("Display")]
        [Description("Indicates the Scale Factor used to calculate series bubble sizes.")]
        public double BubbleScaleFactor
        {
            get { return (_BubbleScaleFactor); }

            set
            {
                if (value != _BubbleScaleFactor)
                {
                    _BubbleScaleFactor = value;

                    OnPropertyChangedEx("BubbleScaleFactor", VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region BubbleSizeMode

        /// <summary>
        /// Gets or sets the mode used to calculate series bubble sizes.
        /// </summary>
        [DefaultValue(BubbleSizeMode.NotSet), Category("Display")]
        [Description("Indicates the mode used to calculate series bubble sizes.")]
        public BubbleSizeMode BubbleSizeMode
        {
            get { return (_BubbleSizeMode); }

            set
            {
                if (value != _BubbleSizeMode)
                {
                    _BubbleSizeMode = value;

                    OnPropertyChangedEx("BubbleSizeMode", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region ChartIndicators

        ///<summary>
        /// Gets a reference to the Chart Indicators collection.
        ///</summary>
        [DefaultValue(null), Category("Appearance")]
        [Description("Indicates the Chart Indicators collection.")]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        public ChartIndicatorCollection ChartIndicators
        {
            get
            {
                if (_ChartIndicators == null)
                {
                    _ChartIndicators = new ChartIndicatorCollection();

                    _ChartIndicators.CollectionChanged += ChartIndicators_CollectionChanged;
                }

                return (_ChartIndicators);
            }

            internal set
            {
                if (_ChartIndicators != null)
                    _ChartIndicators.CollectionChanged -= ChartIndicators_CollectionChanged;

                _ChartIndicators = value;

                if (_ChartIndicators != null)
                    _ChartIndicators.CollectionChanged += ChartIndicators_CollectionChanged;
            }
        }

        #region ChartIndicators_CollectionChanged

        void ChartIndicators_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
        {
            bool updateLayout = false;

            switch (e.Action)
            {
                case NotifyCollectionChangedAction.Add:
                    foreach (ChartIndicator ci in e.NewItems)
                    {
                        if (ci.ShowInLegend == true || ci.ShowInParentLegend == true)
                            updateLayout = true;

                        ci.Parent = this;
                    }
                    break;

                case NotifyCollectionChangedAction.Replace:
                    foreach (ChartIndicator ci in e.OldItems)
                    {
                        if (ci.ShowInLegend == true || ci.ShowInParentLegend == true)
                            updateLayout = true;

                        ci.Parent = null;
                    }

                    foreach (ChartIndicator ci in e.NewItems)
                    {
                        if (ci.ShowInLegend == true || ci.ShowInParentLegend == true)
                            updateLayout = true;

                        ci.Parent = this;
                    }
                    break;

                case NotifyCollectionChangedAction.Remove:
                    foreach (ChartIndicator ci in e.OldItems)
                    {
                        if (ci.ShowInLegend == true || ci.ShowInParentLegend == true)
                            updateLayout = true;

                        ci.Parent = null;
                    }
                    break;
            }

            if (updateLayout == true)
                InvalidateLayout();
            else
                InvalidateRender();
        }

        #endregion

        #endregion

        #region ChartLineAreaDisplayMode

        /// <summary>
        /// Gets or sets the Line 'Area' display mode.
        /// </summary>
        [DefaultValue(ChartLineAreaDisplayMode.NotSet), Category("Display")]
        [Description("Indicates the Line ChartType display mode.")]
        [Editor("DevComponents.Charts.Design.FlagsEnumUIEditor, DevComponents.Charts.Design, " +
                "Version=14.1.0.37, Culture=neutral,  PublicKeyToken=90f470f34c89ccaf", typeof(UITypeEditor))]
        public ChartLineAreaDisplayMode ChartLineAreaDisplayMode
        {
            get { return (_ChartLineAreaDisplayMode); }

            set
            {
                if (value != _ChartLineAreaDisplayMode)
                {
                    _ChartLineAreaDisplayMode = value;

                    OnPropertyChangedEx("ChartLineAreaDisplayMode", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region ChartLineDisplayMode

        /// <summary>
        /// Gets or sets the Line ChartType display mode.
        /// </summary>
        [DefaultValue(ChartLineDisplayMode.NotSet), Category("Display")]
        [Description("Indicates the Line ChartType display mode.")]
        [Editor("DevComponents.Charts.Design.FlagsEnumUIEditor, DevComponents.Charts.Design, " +
                "Version=14.1.0.37, Culture=neutral,  PublicKeyToken=90f470f34c89ccaf", typeof(UITypeEditor))]
        public ChartLineDisplayMode ChartLineDisplayMode
        {
            get { return (_ChartLineDisplayMode); }

            set
            {
                if (value != _ChartLineDisplayMode)
                {
                    _ChartLineDisplayMode = value;

                    _SortedSeriesPoints = null;

                    OnPropertyChangedEx("ChartLineDisplayMode", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region ChartSeriesVisualStyle

        /// <summary>
        /// Gets or sets the visual style for the series.
        /// </summary>
        [Category("Style")]
        [Description("Indicates the visual style for the series.")]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        public ChartSeriesVisualStyle ChartSeriesVisualStyle
        {
            get
            {
                if (_ChartSeriesVisualStyle == null)
                {
                    _ChartSeriesVisualStyle = new ChartSeriesVisualStyle();

                    StyleVisualChangeHandler(null, _ChartSeriesVisualStyle);
                }

                return (_ChartSeriesVisualStyle);
            }

            set
            {
                if (_ChartSeriesVisualStyle != value)
                {
                    ChartSeriesVisualStyle oldValue = _ChartSeriesVisualStyle;

                    _ChartSeriesVisualStyle = value;

                    OnStyleChanged("ChartSeriesVisualStyle", oldValue, value);

                    if (oldValue != null)
                        oldValue.Dispose();
                }
            }
        }

        #endregion

        #region ConvexHullDisplayMode

        /// <summary>
        /// Gets or sets the ConvexHull display mode.
        /// </summary>
        [DefaultValue(ConvexHullDisplayMode.NotSet), Category("Display")]
        [Description("Indicates the ConvexHull display mode.")]
        [Editor("DevComponents.Charts.Design.FlagsEnumUIEditor, DevComponents.Charts.Design, " +
                "Version=14.1.0.37, Culture=neutral,  PublicKeyToken=90f470f34c89ccaf", typeof(UITypeEditor))]
        public ConvexHullDisplayMode ConvexHullDisplayMode
        {
            get { return (_ConvexHullDisplayMode); }

            set
            {
                if (value != _ConvexHullDisplayMode)
                {
                    _ConvexHullDisplayMode = value;

                    OnPropertyChangedEx("ConvexHullDisplayMode", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region CrosshairEnabled

        ///<summary>
        /// Gets or sets whether Crosshair support is enabled for the series.
        ///</summary>
        [DefaultValue(Tbool.NotSet), Category("Crosshair")]
        [Description("Indicates whether Crosshair support is enabled for the series.")]
        public Tbool CrosshairEnabled
        {
            get { return (_CrosshairEnabled); }

            set
            {
                if (value != _CrosshairEnabled)
                {
                    _CrosshairEnabled = value;

                    OnPropertyChanged("CrosshairEnabled");
                }
            }
        }

        #endregion

        #region CrosshairHighlightPoints

        ///<summary>
        /// Gets or sets whether Crosshair Point highlighting is enabled for the series.
        ///</summary>
        [DefaultValue(Tbool.NotSet), Category("Crosshair")]
        [Description("Indicates whether Crosshair Point highlighting is enabled for the series.")]
        public Tbool CrosshairHighlightPoints
        {
            get { return (_CrosshairHighlightPoints); }

            set
            {
                if (value != _CrosshairHighlightPoints)
                {
                    _CrosshairHighlightPoints = value;

                    OnPropertyChanged("CrosshairHighlightPoints");
                }
            }
        }

        #endregion

        #region CrosshairHighlightSinglePoint

        ///<summary>
        /// Gets or sets whether Crosshair Point highlighting will
        /// only highlight a single point for the series.
        ///</summary>
        [DefaultValue(Tbool.NotSet), Category("Crosshair")]
        [Description("Indicates whether Crosshair Point highlighting will only highlight a single point for the series.")]
        public Tbool CrosshairHighlightSinglePoint
        {
            get { return (_CrosshairHighlightSinglePoint); }

            set
            {
                if (value != _CrosshairHighlightSinglePoint)
                {
                    _CrosshairHighlightSinglePoint = value;

                    OnPropertyChanged("CrosshairHighlightSinglePoint");
                }
            }
        }

        #endregion

        #region CrosshairShowLabels

        ///<summary>
        /// Gets or sets whether Crosshair labels are shown for the series.
        ///</summary>
        [DefaultValue(Tbool.NotSet), Category("Crosshair")]
        [Description("Indicates whether Crosshair labels are shown for the series.")]
        public Tbool CrosshairShowLabels
        {
            get { return (_CrosshairShowLabels); }

            set
            {
                if (value != _CrosshairShowLabels)
                {
                    _CrosshairShowLabels = value;

                    OnPropertyChanged("CrosshairShowLabels");
                }
            }
        }

        #endregion

        #region DataLabels

        ///<summary>
        /// Gets or sets the list of instance Data Labels.
        ///</summary>
        [DefaultValue(null), Category("DataLabel")]
        [Description("Indicates the list of instance Data Labels.")]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        public DataLabelCollection DataLabels
        {
            get
            {
                if (_DataLabels == null)
                {
                    _DataLabels = new DataLabelCollection();

                    _DataLabels.PropertyChanged += DataLabels_PropertyChanged;
                    _DataLabels.CollectionChanged += DataLabels_CollectionChanged;
                }

                return (_DataLabels);
            }

            internal set
            {
                if (_DataLabels != null)
                {
                    _DataLabels.PropertyChanged -= DataLabels_PropertyChanged;
                    _DataLabels.CollectionChanged -= DataLabels_CollectionChanged;
                }

                _DataLabels = value;

                if (_DataLabels != null)
                {
                    _DataLabels.PropertyChanged += DataLabels_PropertyChanged;
                    _DataLabels.CollectionChanged += DataLabels_CollectionChanged;
                }
            }
        }

        #region DataLabels_PropertyChanged

        void DataLabels_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            InvalidateRender();
        }

        #endregion

        #region DataLabels_CollectionChanged

        private void DataLabels_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
        {
            switch (e.Action)
            {
                case NotifyCollectionChangedAction.Add:
                    foreach (DataLabel dl in e.NewItems)
                    {
                        dl.Parent = this;
                        dl.PropertyChanged += DataLabel_PropertyChanged;
                    }
                    break;

                case NotifyCollectionChangedAction.Replace:
                    foreach (DataLabel dl in e.OldItems)
                    {
                        dl.Parent = null;
                        dl.PropertyChanged -= DataLabel_PropertyChanged;
                    }

                    foreach (DataLabel dl in e.NewItems)
                    {
                        dl.Parent = this;
                        dl.PropertyChanged += DataLabel_PropertyChanged;
                    }
                    break;

                case NotifyCollectionChangedAction.Remove:
                case NotifyCollectionChangedAction.Reset:
                    if (e.OldItems != null)
                    {
                        foreach (DataLabel dl in e.OldItems)
                            dl.PropertyChanged -= DataLabel_PropertyChanged;
                    }
                    break;
            }

            InvalidateLayout();
        }

        private void DataLabel_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            InvalidateLayout();
        }

        #endregion

        #endregion

        #region DataLabelVisualStyle

        /// <summary>
        /// Gets or sets the visual style for the data labels.
        /// </summary>
        [Category("Style")]
        [Description("Indicates the visual style for the data labels.")]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        public DataLabelVisualStyle DataLabelVisualStyle
        {
            get
            {
                if (_DataLabelVisualStyle == null)
                {
                    _DataLabelVisualStyle = new DataLabelVisualStyle();

                    StyleVisualChangeHandler(null, _DataLabelVisualStyle);
                }

                return (_DataLabelVisualStyle);
            }

            set
            {
                if (_DataLabelVisualStyle != value)
                {
                    DataLabelVisualStyle oldValue = _DataLabelVisualStyle;

                    _DataLabelVisualStyle = value;

                    OnStyleChanged("DataLabelVisualStyle", oldValue, value);

                    if (oldValue != null)
                        oldValue.Dispose();
                }
            }
        }

        #endregion

        #region DisplayLinePointsOnTop

        /// <summary>
        /// Gets or sets whether series points are displayed on top of series line.
        /// </summary>
        [DefaultValue(true), Category("Appearance")]
        [Description("Indicates whether series points are displayed on top of series line.")]
        public bool DisplayLinePointsOnTop
        {
            get { return (TestState(States.DisplayLinePointsOnTop)); }

            set
            {
                if (value != DisplayLinePointsOnTop)
                {
                    SetState(States.DisplayLinePointsOnTop, value);

                    OnPropertyChangedEx("DisplayLinePointsOnTop", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region DotPlotIndexValue

        /// <summary>
        /// Gets or sets the value used to index between DotPlot points. Default is 1.
        /// </summary>
        [DefaultValue(1.0d), Category("Display")]
        [Description("Indicates the value used to index between DotPlot points. Default is 1.")]
        public double DotPlotIndexValue
        {
            get { return (_DotPlotIndexValue); }

            set
            {
                if (value != _DotPlotIndexValue)
                {
                    if (value < 0)
                        throw new ArgumentException("Value must be > 0");

                    _DotPlotIndexValue = value;

                    OnPropertyChangedEx("DotPlotIndexValue", VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region EffectiveDataLabelStyle

        /// <summary>
        /// Gets a reference to the DataLabel effective (cached, composite) style.
        /// </summary>
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public DataLabelVisualStyle EffectiveDataLabelStyle
        {
            get { return (_EffectiveDataLabelStyle.Style); }
        }

        #endregion

        #region EffectiveSeriesStyle

        /// <summary>
        /// Gets a reference to the Series's effective (cached, composite) style.
        /// </summary>
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        [Description("Indicates a reference to the Series's Effective (cached, composite) style.")]
        public ChartSeriesVisualStyle EffectiveChartSeriesStyle
        {
            get { return (_EffectiveChartSeriesStyle.Style); }
        }

        #endregion

        #region EmptyValues

        ///<summary>
        /// Gets or sets the value(s) used to determine if
        /// a series point is empty or missing.
        ///</summary>
        [Category("Empty")]
        [Description("Indicates the value(s) used to determine if a series point is empty or missing.")]
        [Editor("DevComponents.Charts.Design.SeriesPointValueEditor, DevComponents.Charts.Design, " +
                "Version=14.1.0.37, Culture=neutral,  PublicKeyToken=90f470f34c89ccaf", typeof(UITypeEditor))]
        public object[] EmptyValues
        {
            get { return (_EmptyValues); }

            set
            {
                if (value != _EmptyValues)
                {
                    _EmptyValues = value;

                    OnPropertyChangedEx("EmptyValue", Style.VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region EnableEmptyValues

        /// <summary>
        /// Gets or sets whether EmptyValues are processed in the series
        /// </summary>
        [DefaultValue(false), Category("Empty")]
        [Description("Indicates whether EmptyValues are processed in the series.")]
        public bool EnableEmptyValues
        {
            get { return (TestState(States.EnableEmptyValues)); }

            set
            {
                if (value != EnableEmptyValues)
                {
                    SetState(States.EnableEmptyValues, value);

                    _PointData = null;
                    _EmptyPointData = null;
                    _StepPointData = null;

                    OnPropertyChangedEx("EnableEmptyValues", VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region GroupId

        ///<summary>
        /// Gets or sets the logical Id used to group qualitative series.
        ///</summary>
        [DefaultValue(0), Category("Display")]
        [Description("Indicates the logical Id used to group qualitative series).")]
        public int GroupId
        {
            get { return (_GroupId); }

            set
            {
                if (value != _GroupId)
                {
                    _GroupId = value;

                    OnPropertyChangedEx("GroupId", Style.VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region HiLoBarType

        ///<summary>
        /// Gets or sets the Series HiLoBar Type.
        ///</summary>
        [DefaultValue(HiLoBarType.Box), Category("Appearance")]
        [Description("Indicates the Series HiLoBar Type.")]
        public HiLoBarType HiLoBarType
        {
            get { return (_HiLoBarType); }

            set
            {
                if (value != _HiLoBarType)
                {
                    _HiLoBarType = value;

                    OnPropertyChangedEx("HiLoBarType", VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region MaxValueX

        ///<summary>
        /// Gets the series Maximum X value.
        ///</summary>
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public object MaxValueX
        {
            get
            {
                UpdateSeriesRange();

                if (IsRotated == true)
                    return (_MaxValueY);

                return (_MaxValueX);
            }
        }

        #endregion

        #region MaxValueY

        ///<summary>
        /// Gets the series Maximum Y value.
        ///</summary>
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public object MaxValueY
        {
            get
            {
                UpdateSeriesRange();

                if (IsRotated == true)
                    return (_MaxValueX);

                return (_MaxValueY);
            }
        }

        #endregion

        #region MinValueX

        ///<summary>
        /// Gets the series minimum X value.
        ///</summary>
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public object MinValueX
        {
            get
            {
                UpdateSeriesRange();

                if (IsRotated == true)
                    return (_MinValueY);

                return (_MinValueX);
            }
        }

        #endregion

        #region MinValueY

        ///<summary>
        /// Gets the series minimum Y value.
        ///</summary>
        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public object MinValueY
        {
            get
            {
                UpdateSeriesRange();

                if (IsRotated == true)
                    return (_MinValueX);

                return (_MinValueY);
            }
        }

        #endregion

        #region PointLabelDisplayMode

        /// <summary>
        /// Gets or sets the display mode for the chart PointLabels.
        /// </summary>
        [DefaultValue(PointLabelDisplayMode.NotSet), Category("DataLabel")]
        [Description("Indicates the display mode for the chart PointLabels.")]
        [Editor("DevComponents.Charts.Design.FlagsEnumUIEditor, DevComponents.Charts.Design, " +
                "Version=14.1.0.37, Culture=neutral,  PublicKeyToken=90f470f34c89ccaf", typeof(UITypeEditor))]
        public PointLabelDisplayMode PointLabelDisplayMode
        {
            get { return (_PointLabelDisplayMode); }

            set
            {
                if (value != _PointLabelDisplayMode)
                {
                    _PointLabelDisplayMode = value;

                    InvalidatePointLabels();

                    OnPropertyChangedEx("PointLabelDisplayMode", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region PointLabelMinDistance

        ///<summary>
        /// Gets or sets the minimum distance between label data points.
        ///</summary>
        [DefaultValue(0), Category("DataLabel")]
        [Description("Indicates the minimum distance between label data points.")]
        public int PointLabelMinDistance
        {
            get { return (_PointLabelMinDistance); }

            set
            {
                if (value != _PointLabelMinDistance)
                {
                    if (value < 0)
                        throw new Exception("Minimum Distance must be >= 0");

                    _PointLabelMinDistance = value;

                    InvalidatePointLabels();

                    OnPropertyChangedEx("PointLabelMinDistance", Style.VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region PointLabelSkip

        ///<summary>
        /// Gets or sets the number of inter-label points to skip.
        ///</summary>
        [DefaultValue(0), Category("DataLabel")]
        [Description("Indicates the number of inter-label points to skip.")]
        public int PointLabelSkip
        {
            get { return (_PointLabelSkip); }

            set
            {
                if (value != _PointLabelSkip)
                {
                    if (value < 0)
                        throw new Exception("Skip value must be >= 0");

                    _PointLabelSkip = value;

                    InvalidatePointLabels();

                    OnPropertyChangedEx("PointLabelSkip", Style.VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region ScaleTypeX

        ///<summary>
        /// Gets or sets the X axis Scale Type.
        ///</summary>
        [DefaultValue(ScaleType.NotSet), Category("Axis")]
        [Description("Indicates the X axis Scale Type.")]
        public ScaleType ScaleTypeX
        {
            get { return (_ScaleTypeX); }

            set
            {
                if (value != _ScaleTypeX)
                {
                    if (ValidScaleTypeX(value) == false)
                        throw new Exception("Incompatible ScaleTypeX for defined series data.");

                    _ScaleTypeX = value;

                    InvalidatePoints();

                    OnPropertyChangedEx("ScaleTypeX", VisualChangeType.Layout);
                }
            }
        }

        #region ValidScaleTypeX

        private bool ValidScaleTypeX(ScaleType scaleType)
        {
            if (scaleType == ScaleType.NotSet || scaleType == ScaleType.Auto)
                return (true);

            if (SeriesPoints.Count > 0)
            {
                for (int i = 0; i < SeriesPoints.Count; i++)
                {
                    SeriesPoint sp = SeriesPoints[i];

                    if (sp.ValueX != null)
                    {
                        Type dataType = sp.ValueX.GetType();
                        ScaleType autoType = SeriesPoint.GetScaleType(dataType);

                        if (scaleType == autoType)
                            return (true);

                        if (scaleType == ScaleType.Qualitative)
                            return (true);

                        return (false);
                    }
                }
            }

            return (true);
        }

        #endregion

        #endregion

        #region ScaleTypeY

        ///<summary>
        /// Gets or sets the Y axis Scale Type.
        ///</summary>
        [DefaultValue(ScaleType.NotSet), Category("Axis")]
        [Description("Indicates the Y axis Scale Type.")]
        public ScaleType ScaleTypeY
        {
            get { return (_ScaleTypeY); }

            set
            {
                if (value != _ScaleTypeY)
                {
                    if (ValidScaleTypeY(value) == false)
                        throw new Exception("Incompatible ScaleTypeY for defined series data.");

                    _ScaleTypeY = value;

                    InvalidatePoints();

                    OnPropertyChangedEx("ScaleTypeY", VisualChangeType.Layout);
                }
            }
        }

        #region ValidScaleTypeY

        private bool ValidScaleTypeY(ScaleType scaleType)
        {
            if (scaleType == ScaleType.NotSet || scaleType == ScaleType.Auto)
                return (true);

            if (SeriesPoints.Count > 0)
            {
                for (int i = 0; i < SeriesPoints.Count; i++)
                {
                    SeriesPoint sp = SeriesPoints[i];

                    if (sp.ValueY != null && sp.ValueY.Length > 0)
                    {
                        Type dataType = sp.ValueY[0].GetType();
                        ScaleType autoType = SeriesPoint.GetScaleType(dataType);

                        if (scaleType == autoType)
                            return (true);

                        if (scaleType == ScaleType.Qualitative)
                            return (true);

                        return (false);
                    }
                }
            }

            return (true);
        }

        #endregion

        #endregion

        #region SeriesPoints

        ///<summary>
        /// Gets the series point data collection
        ///</summary>
        [Category("Data")]
        [Description("Indicates the series point data collection.")]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        public SeriesPointCollection SeriesPoints
        {
            get
            {
                if (_SeriesPoints == null)
                {
                    _SeriesPoints = new SeriesPointCollection();

                    _SeriesPoints.CollectionChanged += SeriesPoints_CollectionChanged;
                }

                return (_SeriesPoints);
            }

            set
            {
                if (value != _SeriesPoints)
                {
                    if (_SeriesPoints != null)
                        _SeriesPoints.CollectionChanged -= SeriesPoints_CollectionChanged;

                    _SeriesPoints = value;

                    if (_SeriesPoints != null)
                        _SeriesPoints.CollectionChanged += SeriesPoints_CollectionChanged;
                }
            }
        }

        #region SeriesPoints_CollectionChanged

        void SeriesPoints_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
        {
            SeriesRangeChanged = true;

            InvalidateLayout();
        }

        #endregion

        #endregion

        #region SeriesType

        ///<summary>
        /// Gets or sets the Series Type.
        ///</summary>
        [DefaultValue(SeriesType.Point), Category("Appearance")]
        [Description("Indicates the Series Type.")]
        public override SeriesType SeriesType
        {
            get { return (base.SeriesType); }

            set
            {
                if (value != base.SeriesType)
                {
                    base.SeriesType = value;

                    IsRotated = (
                        value == SeriesType.HorizontalDot ||
                        value == SeriesType.HorizontalBar ||
                        value == SeriesType.HorizontalHiLoBar);
                }
            }
        }

        #endregion

        #region ShowHiLoBarMedianLines

        /// <summary>
        /// Gets or sets whether defined HiLoBar Median lines are shown.
        /// </summary>
        [DefaultValue(false), Category("Empty")]
        [Description("Indicates whether defined HiLoBar Median lines are shown.")]
        public bool ShowHiLoBarMedianLines
        {
            get { return (TestState(States.ShowHiLoBarMedianLines)); }

            set
            {
                if (value != ShowHiLoBarMedianLines)
                {
                    SetState(States.ShowHiLoBarMedianLines, value);

                    OnPropertyChangedEx("ShowHiLoBarMedianLines", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region ShowEmptyLines

        /// <summary>
        /// Gets or sets whether EmptyLines are shown in the series.
        /// </summary>
        [DefaultValue(false), Category("Empty")]
        [Description("Indicates whether EmptyLines are shown in the series.")]
        public bool ShowEmptyLines
        {
            get { return (TestState(States.ShowEmptyLines)); }

            set
            {
                if (value != ShowEmptyLines)
                {
                    SetState(States.ShowEmptyLines, value);

                    InvalidatePoints();

                    OnPropertyChangedEx("ShowEmptyLines", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region ShowEmptyPoints

        /// <summary>
        /// Gets or sets whether EmptyPoints are shown in the series.
        /// </summary>
        [DefaultValue(false), Category("Empty")]
        [Description("Indicates whether EmptyPoints are shown in the series.")]
        public bool ShowEmptyPoints
        {
            get { return (TestState(States.ShowEmptyPoints)); }

            set
            {
                if (value != ShowEmptyPoints)
                {
                    SetState(States.ShowEmptyPoints, value);

                    InvalidatePoints();

                    OnPropertyChangedEx("ShowEmptyPoints", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region ShowOriginValueLabels

        /// <summary>
        /// Gets or sets whether labels are shown for 'Origin' data values.
        /// </summary>
        [DefaultValue(true), Category("Appearance")]
        [Description("Indicates whether labels are shown for 'Origin' data values.")]
        public bool ShowOriginValueLabels
        {
            get { return (TestState(States.ShowOriginValueLabels)); }

            set
            {
                if (value != ShowOriginValueLabels)
                {
                    SetState(States.ShowOriginValueLabels, value);

                    OnPropertyChangedEx("ShowOriginValueLabels", VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region StackQualitativePoints

        /// <summary>
        /// Gets or sets whether Qualitative points are
        /// stacked or spread across the associated grouped column.
        /// </summary>
        [DefaultValue(true), Category("Appearance")]
        [Description("Indicates whether Qualitative points are stacked or spread across the associated grouped column.")]
        public bool StackQualitativePoints
        {
            get { return (TestState(States.StackQualitativePoints)); }

            set
            {
                if (value != StackQualitativePoints)
                {
                    SetState(States.StackQualitativePoints, value);

                    OnPropertyChangedEx("StackQualitativePoints", VisualChangeType.Layout);
                }
            }
        }

        #endregion

        #region StepLines

        /// <summary>
        /// Gets or sets which 'Step lines' are displayed.
        /// </summary>
        [DefaultValue(StepLines.NotSet), Category("Display")]
        [Description("Indicates which 'Step lines' are displayed.")]
        public StepLines StepLines
        {
            get { return (_StepLines); }

            set
            {
                if (value != _StepLines)
                {
                    _StepLines = value;

                    OnPropertyChangedEx("StepLines", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #region StepLineMode

        /// <summary>
        /// Gets or sets the mode used to render "Step Lines" in
        /// the defined Line series.
        /// </summary>
        [DefaultValue(StepLineMode.NotSet), Category("Display")]
        [Description("Indicates the mode used to render 'Step Lines' in the defined Line series.")]
        public StepLineMode StepLineMode
        {
            get { return (_StepLineMode); }

            set
            {
                if (value != _StepLineMode)
                {
                    _StepLineMode = value;

                    OnPropertyChangedEx("StepLineMode", VisualChangeType.Render);
                }
            }
        }

        #endregion

        #endregion

        #region Internal properties

        #region BarOffset

        internal int BarOffset
        {
            get { return (_BarOffset); }
            set { _BarOffset = value; }
        }

        #endregion

        #region BarShadingColors

        internal Color[] BarShadingColors
        {
            get
            {
                if (_BarShadingColors == null)
                {
                    // Top, Bottom, Left, Right

                    _BarShadingColors = new Color[] {
                        Color.FromArgb(200, Color.White),
                        Color.FromArgb(100, Color.Black),
                        Color.FromArgb(100, Color.Black),
                        Color.FromArgb(100, Color.Black)};
                }

                return (_BarShadingColors);
            }
        }

        #endregion

        #region BarWidth

        internal int BarWidth
        {
            get { return (_BarWidth); }
            set { _BarWidth = value; }
        }

        #endregion

        #region IsQualitativeXValues

        internal bool IsQualitativeXValues
        {
            get
            {
                UpdateSeriesRange();

                return (QualitativeXValues.Count > 0);
            }
        }

        #endregion

        #region IsQualitativeYValues

        internal bool IsQualitativeYValues
        {
            get
            {
                UpdateSeriesRange();

                return (QualitativeYValues.Count > 0);
            }
        }

        #endregion

        #region IsBarSeries

        internal bool IsBarSeries
        {
            get
            {
                return (SeriesType == SeriesType.HorizontalBar ||
                        SeriesType == SeriesType.VerticalBar ||
                        SeriesType == SeriesType.HorizontalHiLoBar ||
                        SeriesType == SeriesType.VerticalHiLoBar);
            }
        }

        #endregion

        #region IsRotated

        internal bool IsRotated
        {
            get { return (TestState(States.IsRotated)); }
            set { SetState(States.IsRotated, value); }
        }

        #endregion

        #region IsSorted

        internal bool IsSorted
        {
            get { return (TestState(States.IsSorted)); }
            set { SetState(States.IsSorted, value); }
        }

        #endregion

        #region PlotData

        internal object PlotData
        {
            get { return (_PlotData); }
            set { _PlotData = value; }
        }

        #endregion

        #region PointMarkerEmptyImage

        internal Image PointMarkerEmptyImage
        {
            get { return (_PointMarkerEmptyImage); }
            set { _PointMarkerEmptyImage = value; }
        }

        #endregion

        #region PointMarkerImage

        internal Image PointMarkerImage
        {
            get { return (_PointMarkerImage); }
            set { _PointMarkerImage = value; }
        }

        #endregion

        #region PointMarkerHighlightImage

        internal Image PointMarkerHighlightImage
        {
            get { return (_PointMarkerHighlightImage); }
            set { _PointMarkerHighlightImage = value; }
        }

        #endregion

        #region PointOffset

        internal Point PointOffset
        {
            get { return (_PointOffset); }
            set { _PointOffset = value; }
        }

        #endregion

        #region QualitativeXValues

        internal List<object> QualitativeXValues
        {
            get
            {
                if (_QualitativeXValues == null)
                    _QualitativeXValues = new List<object>();

                return (_QualitativeXValues);
            }

            set { _QualitativeXValues = value; }
        }

        #endregion

        #region QualitativeYValues

        internal List<object> QualitativeYValues
        {
            get
            {
                if (_QualitativeYValues == null)
                    _QualitativeYValues = new List<object>();

                return (_QualitativeYValues);
            }

            set { _QualitativeYValues = value; }
        }

        #endregion

        #region SeriesRangeChanged

        public override bool SeriesRangeChanged
        {
            get { return (base.SeriesRangeChanged); }

            set
            {
                if (value != base.SeriesRangeChanged)
                {
                    base.SeriesRangeChanged = value;

                    if (value == true)
                        _SortedSeriesPoints = null;
                }
            }
        }

        #endregion

        #endregion

        #region MeasureOverride

        protected override void MeasureOverride(ChartLayoutInfo layoutInfo)
        {
            UpdateDataBindings();

            UpdateMarkerImage(layoutInfo.Graphics);
        }

        #region UpdateMarkerImage

        private void UpdateMarkerImage(Graphics g)
        {
            switch (SeriesType)
            {
                case SeriesType.Bubble:
                case SeriesType.VerticalDot:
                case SeriesType.Line:
                case SeriesType.Point:
                case SeriesType.HorizontalDot:
                    if (PointMarkerImage == null)
                    {
                        ChartXy chartXy = Parent as ChartXy;
                        ChartSeriesVisualStyle sstyle = EffectiveChartSeriesStyle;

                        PointMarkerImage = chartXy.GetPointMarker(g, sstyle.MarkerVisualStyle);
                    }
                    break;
            }
        }

        #endregion

        #endregion

        #region ArrangeOverride

        protected override void ArrangeOverride(ChartLayoutInfo layoutInfo)
        {
            BoundsRelative = layoutInfo.LayoutBounds;

            if (SeriesType == SeriesType.Bubble)
                UpdateBubblePointOffset();
        }

        #region UpdateBubblePointOffset

        private void UpdateBubblePointOffset()
        {
            BubblePlotData bdata = _PlotData as BubblePlotData;

            if (bdata != null)
            {
                ChartXy chartXy = Parent as ChartXy;

                Rectangle bounds = chartXy.ContentBoundsEx;

                float minSize = Dpi.Width(BubbleMinSize);
                float maxSize = (float)(Math.Min(bounds.Width, bounds.Height) * BubbleMaxPercentage);

                double minTotalSize;
                double maxTotalSize;
                chartXy.GetChartBubbleData(out minTotalSize, out maxTotalSize);

                BubbleSizeMode smode = GetBubbleSizeMode(chartXy);

                double range = maxSize - minSize;

                double sizeRange = (smode == BubbleSizeMode.Diameter)
                    ? maxTotalSize - minTotalSize : MathHelper.ToScalar((float)(maxTotalSize - minTotalSize));

                SortedSeriesPoints ssp = GetSortedSeriesPoints(chartXy);

                for (int i = 0; i < ssp.Count; i++)
                {
                    SeriesPoint sp = ssp[i];

                    if (sp.Visible == true)
                    {
                        int size = GetBubbleSize(sp, smode, minSize, maxSize, range, sizeRange);

                        sp.PointSize = new Size(size, size);
                    }
                }
            }
        }

        #region GetBubbleSize

        private int GetBubbleSize(SeriesPoint sp,
            BubbleSizeMode smode, double minSize, double maxSize, double range, double sizeRange)
        {
            if (sp.ValueY == null || sp.ValueY.Length < 2 || sizeRange == 0)
                return (int)minSize;

            double size = Math.Abs(GetDoubleValue(sp.ValueY[1]));

            double value = (smode == BubbleSizeMode.Diameter)
                ? (size * range) / sizeRange
                : (MathHelper.ToScalar((float)size) * range) / sizeRange;

            if (BubbleScaleFactor > 0)
                value *= BubbleScaleFactor;

            value = Math.Max(minSize, value);

            return ((int)Math.Min(maxSize, value));
        }

        #endregion

        #endregion

        #endregion

        #region RenderOverride

        protected override void RenderOverride(ChartRenderInfo renderInfo)
        {
            if (SeriesPoints.Count > 0)
            {
                Graphics g = renderInfo.Graphics;

                if (SeriesPoints.Count > 0)
                {
                    ChartXy chartXy = Parent as ChartXy;
                    ChartSeriesVisualStyle sstyle = EffectiveChartSeriesStyle;

                    SortedSeriesPoints ssp = GetSortedSeriesPoints(chartXy);
                    ssp.SeriesLayoutCount = chartXy.SeriesLayoutCount;

                    UpdateMarkerImage(g);

                    int n = Dpi.Width1;

                    Point pt = chartXy.GetGlobalAdjustedPoint(chartXy.ContentBounds.Location);
                    RenderBounds = new Rectangle(pt, chartXy.ContentBounds.Size);

                    if (RenderBounds.Width > 0 && RenderBounds.Height > 0)
                    {
                        switch (SeriesType)
                        {
                            case SeriesType.Bubble:
                                RenderBubblePlot(g, chartXy, ssp, sstyle);
                                break;

                            case SeriesType.HorizontalBar:
                                RenderHBarPlot(g, chartXy, ssp, sstyle);
                                break;

                            case SeriesType.HorizontalDot:
                                RenderHDotPlot(g, chartXy, ssp, sstyle);
                                break;

                            case SeriesType.HorizontalHiLoBar:
                                RenderHStockPlot(renderInfo, chartXy, ssp, sstyle);
                                break;

                            case SeriesType.Point:
                                RenderPointPlot(g, chartXy, ssp, true, sstyle);
                                break;

                            case SeriesType.Line:
                                RenderLinePlot(g, chartXy, ssp, sstyle);
                                break;

                            case SeriesType.VerticalBar:
                                RenderVBarPlot(g, chartXy, ssp, sstyle);
                                break;

                            case SeriesType.VerticalDot:
                                RenderVDotPlot(g, chartXy, ssp, sstyle);
                                break;

                            case SeriesType.VerticalHiLoBar:
                                RenderVStockPlot(renderInfo, chartXy, ssp, sstyle);
                                break;
                        }
                    }
                }
            }
        }

        #region GetSortedSeriesPoints

        internal SortedSeriesPoints GetSortedSeriesPoints(ChartXy chartXy)
        {
            if (_SortedSeriesPoints == null)
            {
                bool sort = (IsSorted == false && NeedSortedSeries(chartXy) == true);

                _SortedSeriesPoints = new SortedSeriesPoints(this, sort);

                if (SeriesType == SeriesType.VerticalDot || SeriesType == SeriesType.HorizontalDot)
                    CombineDuplicates(_SortedSeriesPoints);
            }

            return (_SortedSeriesPoints);
        }

        #region CombineDuplicates

        private void CombineDuplicates(SortedSeriesPoints ssp)
        {
            SeriesPoint spLast = null;

            List<int> cList = new List<int>();
            List<int> iList = new List<int>();

            int dcount = 0;
            int spLastIndex = 0;

            for (int i = 0; i < ssp.Count; i++)
            {
                SeriesPoint sp = ssp[i];

                if (spLast != null && spLast.ValueX.Equals(sp.ValueX) == false)
                {
                    iList.Add(spLastIndex);
                    cList.Add(dcount);

                    dcount = 0;

                    spLast = sp;
                    spLastIndex = (ssp.IndexArray != null ? ssp.IndexArray[i] : i);
                }

                dcount += GetDotCount(sp);

                if (spLast == null)
                {
                    spLast = sp;
                    spLastIndex = (ssp.IndexArray != null ? ssp.IndexArray[i] : i);
                }
            }

            if (dcount > 0)
            {
                iList.Add(spLastIndex);
                cList.Add(dcount);
            }

            int[] indexArray = new int[iList.Count];
            int[] countArray = new int[iList.Count];

            for (int i = 0; i < iList.Count; i++)
            {
                indexArray[i] = iList[i];
                countArray[i] = cList[i];
            }

            ssp.IndexArray = indexArray;
            ssp.CountArray = countArray;
        }

        #endregion

        #region NeedSortedSeries

        private bool NeedSortedSeries(ChartXy chartXy)
        {
            if (IsSorted == true || _ActualScaleTypeX == ScaleType.Qualitative)
                return (false);

            if (SeriesType != SeriesType.Line)
                return (true);

            ChartLineDisplayMode mode = GetLineDisplayMode(chartXy);

            return ((mode & ChartLineDisplayMode.DisplayUnsorted) != ChartLineDisplayMode.DisplayUnsorted);
        }

        #endregion

        #endregion

        #region RenderBarPlot

        #region RenderHBarPlot

        private void RenderHBarPlot(Graphics g,
            ChartXy chartXy, SortedSeriesPoints ssp, ChartSeriesVisualStyle sstyle)
        {
            g.RenderingOrigin = chartXy.GetLocalAdjustedPoint(Point.Empty);

            BarRenderData rd = new BarRenderData(chartXy, AxisX ?? chartXy.AxisX);

            rd.FillRange = GetBarFillRange(chartXy);
            rd.BarShading = GetBarShading(chartXy);

            rd.SeriesStyle = sstyle;

            int index = 0;
            bool isHistogram = false;

            if (chartXy.BarShowAsHistogram == Tbool.True)
            {
                ChartAxis axisY = AxisY ?? chartXy.AxisY;
                AxisBar axisBar = axisY.AxisBars[(int)AxisBarType.Bar];

                if (axisBar.BarCount == 1)
                {
                    TickmarkLayout layout = axisY.TickmarkLayout;

                    for (int i = 0; i < layout.Ticks.Length; i++)
                    {
                        if (layout.Ticks[i].LabelIndex >= 0)
                        {
                            index = i;
                            break;
                        }
                    }

                    isHistogram = true;
                }
            }

            for (int i = 0; i < ssp.Count; i++)
            {
                SeriesPoint sp = ssp[i];

                if (sp.Visible == true)
                {
                    rd.Spt = sp.Point[0];
                    rd.Sp = sp;

                    RenderHBar(g, rd, isHistogram, i + index);
                }
            }
        }

        #region RenderHBar

        private void RenderHBar(
            Graphics g, BarRenderData rd, bool isHistogram, int index)
        {
            ChartXy chartXy = rd.ChartXy;
            SeriesPoint sp = rd.Sp;

            sp.PointSize = new Size(5, BarWidth);

            Point ptt = chartXy.GetDataPointEx(this, sp, 0);

            int y = (int)(ptt.Y + BarOffset - BarWidth / 2);
            int height = BarWidth;

            if (isHistogram == true)
                y = GetHistogramSizeY(chartXy, ptt, index, out height);

            int x1 = ptt.X;
            int x2 = GetHBarStart(chartXy, sp);
            int xOrigin = GetHBarOrigin(chartXy, rd.Axis, sp);

            if (x1 > x2)
            {
                int xtemp = x1;
                x1 = x2;
                x2 = xtemp;
            }

            if (x2 <= xOrigin)
            {
                RenderLeftBar(g, rd, y, height, x1, x2, xOrigin);
            }
            else if (x1 >= xOrigin)
            {
                RenderRightBar(g, rd, y, height, x1, x2, xOrigin);
            }
            else
            {
                RenderLeftBar(g, rd, y, height, x1, xOrigin, xOrigin);
                RenderRightBar(g, rd, y, height, xOrigin, x2, xOrigin);
            }
        }

        #region GetHistogramSizeY

        private int GetHistogramSizeY(
            ChartXy chartXy, Point spt, int index, out int height)
        {
            ChartAxis axis = AxisY ?? chartXy.AxisY;
            TickmarkLayout layout = axis.TickmarkLayout;

            if (index < layout.Ticks.Length)
                height = layout.Ticks[index + 1].TickPoint.Y - spt.Y;
            else
                height = (int)layout.MajorInterval;

            int y = spt.Y - (int)(layout.MajorInterval / 2);

            return (y);
        }

        #endregion

        #region GetHBarStart

        internal int GetHBarStart(ChartXy chartXy, SeriesPoint sp)
        {
            ChartAxis axis = AxisX ?? chartXy.AxisX;

            object value = ((sp.ValueY.Length > 1)
                ? sp.ValueY[1] : chartXy.BarOrigin ?? null);

            if (value == null)
            {
                if (axis.ScaleType == ScaleType.Quantitative)
                    value = 0;
                else
                    value = axis.ActualMinValue;
            }

            return (chartXy.GetDataPointX(axis, value));
        }

        #endregion

        #region GetHBarOrigin

        private int GetHBarOrigin(
            ChartXy chartXy, ChartAxis axis, SeriesPoint sp)
        {
            object value = ((sp.ValueY != null && sp.ValueY.Length > 2)
                ? sp.ValueY[2] : (chartXy.BarOrigin ?? null));

            if (value == null)
            {
                if (axis.ScaleType == ScaleType.Quantitative)
                    value = 0;
                else
                    value = axis.ActualMinValue;
            }

            return (chartXy.GetDataPointX(axis, value));
        }

        #endregion

        #region RenderRightBar

        private void RenderRightBar(Graphics g,
            BarRenderData rd, int y, int height, int x1, int x2, int xOrigin)
        {
            Rectangle r = new Rectangle(x1, y, x2 - x1, Math.Max(1, height - 1));

            if (r.IntersectsWith(RenderBounds))
            {
                Background bk = rd.SeriesStyle.BarVisualStyle.Background;
                ChartLineVisualStyle lstyle = rd.SeriesStyle.BarVisualStyle.Border;

                // r is actual area, r2 is FillRange area

                Rectangle r2 = r;

                if (rd.FillRange == BarFillRange.BySeries)
                {
                    r2.X = xOrigin;
                    r2.Width = rd.ChartXy.GetDataPointX(rd.Axis, MaxValueX) - r2.X;
                }

                BarSegment segment = (x1 > xOrigin) ? BarSegment.Right : BarSegment.RightPartial;

                RenderFullHBar(g, rd, r, r2, bk, lstyle, segment);
            }
        }

        #endregion

        #region RenderLeftBar

        private void RenderLeftBar(Graphics g,
            BarRenderData rd, int y, int height, int x1, int x2, int xOrigin)
        {
            Rectangle r = new Rectangle(x1, y, x2 - x1, Math.Max(1, height - 1));

            if (r.IntersectsWith(RenderBounds))
            {
                ChartSeriesVisualStyle sstyle = rd.SeriesStyle;

                Background bk = sstyle.BarVisualStyle.AlternateBackground;

                if (bk.IsEmpty)
                    bk = sstyle.BarVisualStyle.Background;

                ChartLineVisualStyle lstyle = sstyle.BarVisualStyle.AlternateBorder;

                if (lstyle.IsEmpty)
                    lstyle = sstyle.BarVisualStyle.Border;

                Rectangle r2 = r;

                if (rd.FillRange == BarFillRange.BySeries)
                {
                    int left = rd.ChartXy.GetDataPointX(rd.Axis, MinValueX);

                    r2.X = left;
                    r2.Width = xOrigin - left;
                }

                BarSegment segment = (x2 < xOrigin) ? BarSegment.Left : BarSegment.LeftPartial;

                RenderFullHBar(g, rd, r, r2, bk, lstyle, segment);
            }
        }

        #endregion

        #region RenderFullHBar

        private void RenderFullHBar(Graphics g, BarRenderData rd,
            Rectangle r, Rectangle r2, Background bk, ChartLineVisualStyle lstyle, BarSegment segment)
        {
            if (r2.Width > 0 && r2.Height > 0)
            {
                ChartXy chartXy = rd.ChartXy;
                ChartControl chartControl = ChartControl;

                if (chartControl.DoPreRenderSeriesBarEvent(g, chartXy, this, rd.Sp, r, r2, segment) == false)
                {
                    using (Brush br = bk.GetBrush(r2))
                        g.FillRectangle(br, r);

                    int lw = 0;

                    if (lstyle.LinePattern != LinePattern.None)
                    {
                        SmoothingMode sm = g.SmoothingMode;
                        g.SmoothingMode = SmoothingMode.None;

                        using (Pen pen = new Pen(lstyle.LineColor, Dpi.Width(lstyle.LineWidth)))
                        {
                            lw = (int)pen.Width;

                            if (lstyle.LinePattern != LinePattern.NotSet)
                                pen.DashStyle = (DashStyle)lstyle.LinePattern;

                            g.DrawRectangle(pen, r);
                        }

                        g.SmoothingMode = sm;
                    }

                    if (rd.BarShading == true)
                    {
                        Rectangle t = r;
                        t.Inflate(-lw / 2, -lw / 2);

                        t.Width++;
                        t.Height++;

                        RenderHBarShading(g, t, r2, segment);
                    }

                    chartControl.DoPostRenderSeriesBarEvent(g, chartXy, this, rd.Sp, r, r2, segment);
                }
            }
        }

        #region RenderHBarShading

        private void RenderHBarShading(
            Graphics g, Rectangle r, Rectangle r2, BarSegment segment)
        {
            if (r.Width > 6)
            {
                SmoothingMode sm = g.SmoothingMode;
                g.SmoothingMode = SmoothingMode.None;

                int n = (int)(r.Height * .15);

                Color[] colors = (Color[])BarShadingColors.Clone();

                colors[2] = Color.FromArgb(Math.Max(0, colors[2].A - 30), colors[2]);
                colors[3] = Color.FromArgb(Math.Max(0, colors[3].A - 30), colors[3]);

                Rectangle r3 = r;

                r3.Inflate(1, 1);

                using (LinearGradientBrush lbr = new LinearGradientBrush(r3, Color.Empty, Color.Empty, 90f))
                {
                    lbr.WrapMode = WrapMode.Tile;

                    ColorBlend cb = new ColorBlend(4);

                    cb.Colors = new Color[] { colors[0], Color.Transparent, Color.Transparent, colors[1] };
                    cb.Positions = new float[] { 0f, .25f, .75f, 1f };

                    lbr.InterpolationColors = cb;

                    r3.Inflate(-1, -1);

                    g.FillRectangle(lbr, r3);
                }

                switch (segment)
                {
                    case BarSegment.LeftPartial:
                        FillLeft(g, r, n, colors);
                        break;

                    case BarSegment.RightPartial:
                        FillRight(g, r, n, colors);
                        break;

                    default:
                        FillLeft(g, r, n, colors);
                        FillRight(g, r, n, colors);
                        break;
                }

                g.SmoothingMode = sm;
            }
        }

        #region FillLeft

        private void FillLeft(Graphics g, Rectangle r, int n, Color[] colors)
        {
            r.Width = n - 1;
            r.Inflate(1, 0);

            using (LinearGradientBrush lbr = new LinearGradientBrush(r, colors[2], Color.Transparent, 0f))
            {
                lbr.WrapMode = WrapMode.TileFlipX;

                r.X++;

                g.FillRectangle(lbr, r);
            }
        }

        #endregion

        #region FillRight

        private void FillRight(Graphics g, Rectangle r, int n, Color[] colors)
        {
            r.X = r.Right - n;
            r.Width = n;
            r.Inflate(1, 0);

            using (LinearGradientBrush lbr = new LinearGradientBrush(r, colors[2], Color.Transparent, 180f))
            {
                r.X++;
                r.Width--;

                g.FillRectangle(lbr, r);
            }
        }

        #endregion

        #endregion

        #endregion

        #endregion

        #endregion

        #region RenderVBarPlot

        private void RenderVBarPlot(Graphics g,
            ChartXy chartXy, SortedSeriesPoints ssp, ChartSeriesVisualStyle sstyle)
        {
            PointData pd = GatherSeriesPoints(chartXy, ssp, 0, ssp.Count, false);

            if (pd.Points.Count > 0)
            {
                g.RenderingOrigin = chartXy.GetLocalAdjustedPoint(Point.Empty);

                BarRenderData rd = new BarRenderData(chartXy, AxisY ?? chartXy.AxisY);

                rd.FillRange = GetBarFillRange(chartXy);
                rd.BarShading = GetBarShading(chartXy);

                rd.SeriesStyle = sstyle;

                int index = 0;
                bool isHistogram = false;

                if (chartXy.BarShowAsHistogram == Tbool.True)
                {
                    ChartAxis axisX = AxisX ?? chartXy.AxisX;
                    AxisBar axisBar = axisX.AxisBars[(int)AxisBarType.Bar];

                    if (axisBar.BarCount == 1)
                    {
                        TickmarkLayout layout = axisX.TickmarkLayout;

                        for (int i = 0; i < layout.Ticks.Length; i++)
                        {
                            if (layout.Ticks[i].LabelIndex >= 0)
                            {
                                index = i;
                                break;
                            }
                        }

                        isHistogram = true;
                    }
                }

                for (int i = 0; i < pd.Points.Count; i++)
                {
                    Point[] pts = pd.Points[i];
                    SeriesPoint[] spts = pd.SeriesPoints[i];

                    for (int j = 0; j < pts.Length; j++)
                    {
                        rd.Spt = pts[j];
                        rd.Sp = spts[j];

                        RenderVBar(g, rd, isHistogram, j + index);
                    }
                }
            }
        }

        #region RenderVBar

        private void RenderVBar(
            Graphics g, BarRenderData rd, bool isHistogram, int index)
        {
            ChartXy chartXy = rd.ChartXy;
            SeriesPoint sp = rd.Sp;
            Point spt = rd.Spt;

            sp.PointSize = new Size(BarWidth, 5);

            int x = (int)(spt.X + BarOffset - BarWidth / 2);
            int width = BarWidth;

            if (isHistogram == true)
                x = GetHistogramSizeX(chartXy, spt, index, out width);

            int y1 = spt.Y;
            int y2 = GetVBarStart(chartXy, sp);
            int yOrigin = GetVBarOrigin(chartXy, rd.Axis, sp);

            if (y1 > y2)
            {
                int ytemp = y1;
                y1 = y2;
                y2 = ytemp;
            }

            if (y2 <= yOrigin)
            {
                RenderAscendingBar(g, rd, x, width, y1, y2, yOrigin);
            }
            else if (y1 >= yOrigin)
            {
                RenderDescendingBar(g, rd, x, width, y1, y2, yOrigin);
            }
            else
            {
                RenderAscendingBar(g, rd, x, width, y1, yOrigin, yOrigin);
                RenderDescendingBar(g, rd, x, width, yOrigin, y2, yOrigin);
            }
        }

        #region GetHistogramSizeX

        private int GetHistogramSizeX(
            ChartXy chartXy, Point spt, int index, out int width)
        {
            ChartAxis axis = AxisX ?? chartXy.AxisX;
            TickmarkLayout layout = axis.TickmarkLayout;

            if (index < layout.Ticks.Length)
                width = layout.Ticks[index + 1].TickPoint.X - spt.X;
            else
                width = (int)layout.MajorInterval;

            int x = spt.X - (int)(layout.MajorInterval / 2);

            return (x);
        }

        #endregion

        #region GetVBarStart

        internal int GetVBarStart(ChartXy chartXy, SeriesPoint sp)
        {
            ChartAxis axis = AxisY ?? chartXy.AxisY;

            object value = ((sp.ValueY != null && sp.ValueY.Length > 1)
                ? sp.ValueY[1] : (chartXy.BarOrigin ?? null));

            if (value == null)
            {
                if (axis.ScaleType == ScaleType.Quantitative)
                    value = 0;
                else
                    value = axis.ActualMinValue;
            }

            return (chartXy.GetDataPointY(axis, value));
        }

        #endregion

        #region GetVBarOrigin

        private int GetVBarOrigin(
            ChartXy chartXy, ChartAxis axis, SeriesPoint sp)
        {
            object value = ((sp.ValueY != null && sp.ValueY.Length > 2)
                ? sp.ValueY[2] : (chartXy.BarOrigin ?? null));

            if (value == null)
            {
                if (axis.ScaleType == ScaleType.Quantitative)
                    value = 0;
                else
                    value = axis.ActualMinValue;
            }

            return (chartXy.GetDataPointY(axis, value));
        }

        #endregion

        #region RenderAscendingBar

        private void RenderAscendingBar(Graphics g,
            BarRenderData rd, int x, int width, int y1, int y2, int yOrigin)
        {
            Rectangle r = new Rectangle(x, y1, Math.Max(1, width - 1), y2 - y1);

            if (r.IntersectsWith(RenderBounds))
            {
                Background bk = rd.SeriesStyle.BarVisualStyle.Background;
                ChartLineVisualStyle lstyle = rd.SeriesStyle.BarVisualStyle.Border;

                Rectangle r2 = r;

                if (rd.FillRange == BarFillRange.BySeries)
                {
                    int top = rd.ChartXy.GetDataPointY(rd.Axis, MaxValueY);

                    r2.Y = top;
                    r2.Height = yOrigin - top;
                }

                BarSegment segment = (y2 < yOrigin) ? BarSegment.Top : BarSegment.TopPartial;

                RenderFullVBar(g, rd, r, r2, bk, lstyle, segment);
            }
        }

        #endregion

        #region RenderDescendingBar

        private void RenderDescendingBar(Graphics g,
            BarRenderData rd, int x, int width, int y1, int y2, int yOrigin)
        {
            Rectangle r = new Rectangle(x, y1, Math.Max(1, width - 1), y2 - y1);

            if (r.IntersectsWith(RenderBounds))
            {
                ChartSeriesVisualStyle sstyle = rd.SeriesStyle;

                Background bk = sstyle.BarVisualStyle.AlternateBackground;

                if (bk.IsEmpty)
                    bk = sstyle.BarVisualStyle.Background;

                ChartLineVisualStyle lstyle = sstyle.BarVisualStyle.AlternateBorder;

                if (lstyle.IsEmpty)
                    lstyle = sstyle.BarVisualStyle.Border;

                Rectangle r2 = r;

                if (GetBarFillRange(rd.ChartXy) == BarFillRange.BySeries)
                {
                    r2.Y = yOrigin;
                    r2.Height = rd.ChartXy.GetDataPointY(rd.Axis, MinValueY) - r2.Y;
                }

                BarSegment segment = (y1 > yOrigin) ? BarSegment.Bottom : BarSegment.BottomPartial;

                RenderFullVBar(g, rd, r, r2, bk, lstyle, segment);
            }
        }

        #endregion

        #region RenderFullVBar

        private void RenderFullVBar(Graphics g, BarRenderData rd,
            Rectangle r, Rectangle r2, Background bk, ChartLineVisualStyle lstyle, BarSegment segment)
        {
            if (r2.Width > 0 && r2.Height > 0)
            {
                ChartXy chartXy = rd.ChartXy;
                ChartControl chartControl = ChartControl;

                if (chartControl.DoPreRenderSeriesBarEvent(g, chartXy, this, rd.Sp, r, r2, segment) == false)
                {
                    using (Brush br = bk.GetBrush(r2))
                        g.FillRectangle(br, r);

                    int lw = 0;

                    if (lstyle.LinePattern != LinePattern.None)
                    {
                        SmoothingMode sm = g.SmoothingMode;
                        g.SmoothingMode = SmoothingMode.None;

                        using (Pen pen = new Pen(lstyle.LineColor, Dpi.Width(lstyle.LineWidth)))
                        {
                            lw = (int)pen.Width;

                            if (lstyle.LinePattern != LinePattern.NotSet)
                                pen.DashStyle = (DashStyle)lstyle.LinePattern;

                            g.DrawRectangle(pen, r);
                        }

                        g.SmoothingMode = sm;
                    }

                    if (rd.BarShading == true)
                    {
                        Rectangle t = r;
                        t.Inflate(-lw / 2, -lw / 2);

                        t.Width++;
                        t.Height++;

                        RenderVBarShading(g, t, r2, segment);
                    }

                    chartControl.DoPostRenderSeriesBarEvent(g, chartXy, this, rd.Sp, r, r2, segment);
                }
            }
        }

        #region RenderVBarShading

        private void RenderVBarShading(
            Graphics g, Rectangle r, Rectangle r2, BarSegment segment)
        {
            int n = r.Width / 10 + 1;

            if (r.Width > 6 && r.Height > n)
            {
                SmoothingMode sm = g.SmoothingMode;
                g.SmoothingMode = SmoothingMode.None;

                Color[] colors = (Color[])BarShadingColors.Clone();

                Rectangle r3 = r;

                using (LinearGradientBrush lbr = new LinearGradientBrush(r3, Color.Empty, Color.Empty, 0f))
                {
                    lbr.WrapMode = WrapMode.TileFlipX;

                    ColorBlend cb = new ColorBlend(4);

                    cb.Colors = new Color[] { colors[2], Color.Transparent, Color.Transparent, colors[3] };
                    cb.Positions = new float[] { 0f, .15f, .85f, 1f };

                    lbr.InterpolationColors = cb;

                    g.FillRectangle(lbr, r3);
                }

                switch (segment)
                {
                    case BarSegment.TopPartial:
                        FillTop(g, r, n, colors);
                        break;

                    case BarSegment.BottomPartial:
                        FillBottom(g, r, n, colors);
                        break;

                    default:
                        FillTop(g, r, n, colors);
                        FillBottom(g, r, n, colors);
                        break;
                }

                g.SmoothingMode = sm;
            }
        }

        #region FillTop

        private void FillTop(Graphics g, Rectangle r, int n, Color[] colors)
        {
            using (Pen pen = new Pen(colors[0]))
            {
                Point pt1 = new Point(r.X + 1, r.Y);
                Point pt2 = new Point(r.Right - 2, r.Y);

                for (int i = 0; i < n; i++)
                {
                    g.DrawLine(pen, pt1, pt2);

                    pt1.X++;
                    pt2.X--;

                    pt1.Y++;
                    pt2.Y++;
                }
            }
        }

        #endregion

        #region FillBottom

        private void FillBottom(Graphics g, Rectangle r, int n, Color[] colors)
        {
            using (Pen pen = new Pen(colors[1]))
            {
                Point pt1 = new Point(r.X + 1, r.Bottom - 1);
                Point pt2 = new Point(r.Right - 2, r.Bottom - 1);

                for (int i = 0; i < n; i++)
                {
                    g.DrawLine(pen, pt1, pt2);

                    pt1.X++;
                    pt2.X--;

                    pt1.Y--;
                    pt2.Y--;
                }
            }
        }

        #endregion

        #endregion

        #endregion

        #endregion

        #endregion

        #region GetBarFillRange

        private BarFillRange GetBarFillRange(ChartXy chartXy)
        {
            BarFillRange fillRange = BarFillRange;

            if (fillRange == BarFillRange.NotSet)
                fillRange = chartXy.BarFillRange;

            return ((fillRange != BarFillRange.NotSet)
                ? fillRange : BarFillRange.ByBar);
        }

        #endregion

        #region GetBarLabelPosition

        internal BarLabelPosition GetBarLabelPosition(ChartXy chartXy)
        {
            BarLabelPosition labelPos = BarLabelPosition;

            if (labelPos == BarLabelPosition.NotSet)
                labelPos = chartXy.BarLabelPosition;

            return ((labelPos != BarLabelPosition.NotSet)
                ? labelPos : BarLabelPosition.Center);
        }

        #endregion

        #region GetBarShading

        private bool GetBarShading(ChartXy chartXy)
        {
            Tbool barShading = BarShadingEnabled;

            if (barShading == Tbool.NotSet)
                barShading = chartXy.BarShadingEnabled;

            return (barShading == Tbool.True);
        }

        #endregion

        #endregion

        #region RenderBubblePlot

        private void RenderBubblePlot(Graphics g,
            ChartXy chartXy, SortedSeriesPoints ssp, ChartSeriesVisualStyle sstyle)
        {
            BubblePlotData bdata = _PlotData as BubblePlotData;

            if (bdata != null)
            {
                double minIntensity = 32;
                double maxIntensity = 255;

                PointMarkerVisualStyle pstyle = sstyle.MarkerVisualStyle;
                PointMarkerVisualStyle hstyle = GetHighlightStyle(chartXy, sstyle);

                if (DisplayLinePointsOnTop == true)
                    RenderConvexHull(g, chartXy, ssp, sstyle, pstyle);

                BubbleIntensityMode imode = GetBubbleIntensityMode(chartXy);

                for (int i = 0; i < ssp.Count; i++)
                {
                    SeriesPoint sp = ssp[i];

                    if (sp.Visible == true)
                    {
                        int size = sp.PointSize.Width;

                        Point pt = chartXy.GetDataPointNa(this, sp, 0);
                        Rectangle r = new Rectangle(pt.X - size / 2, pt.Y - size / 2, size, size);

                        if (r.IntersectsWith(RenderBounds))
                        {
                            Point ppt = chartXy.GetLocalAdjustedPoint(pt);

                            bool isCrossPoint = chartXy.IsCrosshairSeriesPoint(this, ppt);
                            int intensity = GetIntensity(sp, imode, bdata, minIntensity, maxIntensity);

                            PointMarkerVisualStyle style = (hstyle != null && isCrossPoint) ? hstyle : pstyle;

                            Image image = style.GetPointMarkerImage();

                            if (image == null)
                                image = GetPointMarker(g, style, r.Size);

                            if (image != null)
                            {
                                g.DrawImage(image, r);
                            }
                            else if (style.Type == PointMarkerType.Ellipse || style.Type == PointMarkerType.NotSet)
                            {
                                using (Brush br = style.Background.GetBrush(r, intensity))
                                {
                                    g.FillEllipse(br, r);

                                    if (style.BorderColor.IsEmpty == false && style.BorderWidth > 0)
                                    {
                                        using (Pen pen = new Pen(style.BorderColor, Dpi.Width(style.BorderWidth)))
                                            g.DrawEllipse(pen, r);
                                    }
                                }
                            }
                        }
                    }
                }

                if (DisplayLinePointsOnTop == false)
                    RenderConvexHull(g, chartXy, ssp, sstyle, pstyle);

                if (hstyle != null)
                    hstyle.Dispose();
            }
        }

        #region GetIntensity

        private int GetIntensity(SeriesPoint sp,
            BubbleIntensityMode imode, BubblePlotData bdata, double minIntensity, double maxIntensity)
        {
            if (imode != BubbleIntensityMode.None && imode != BubbleIntensityMode.NotSet)
            {
                if (sp.ValueY.Length > 2)
                {
                    double intensity = -1;

                    if (sp.ValueY[2] is double)
                        intensity = (double)sp.ValueY[2];

                    else if (sp.ValueY[2] is int)
                        intensity = Convert.ToDouble(sp.ValueY[2]);

                    if (imode == BubbleIntensityMode.Alpha)
                        return ((int)intensity);

                    if (intensity >= 0)
                    {
                        double range = maxIntensity - minIntensity;
                        double intensityRange = bdata.MaxIntensity - bdata.MinIntensity;

                        if (intensityRange <= 0)
                            return (-1);

                        return (int)(((intensity - bdata.MinIntensity) * range) / intensityRange + minIntensity);
                    }
                }
            }

            return (-1);
        }

        #endregion

        #region GetBubbleSizeMode

        private BubbleSizeMode GetBubbleSizeMode(ChartXy chartXy)
        {
            if (BubbleSizeMode != BubbleSizeMode.NotSet)
                return (BubbleSizeMode);

            if (chartXy.BubbleSizeMode != BubbleSizeMode.NotSet)
                return (chartXy.BubbleSizeMode);

            return (BubbleSizeMode.Area);
        }

        #endregion

        #region GetBubbleIntensityMode

        private BubbleIntensityMode GetBubbleIntensityMode(ChartXy chartXy)
        {
            if (BubbleIntensityMode != BubbleIntensityMode.NotSet)
                return (BubbleIntensityMode);

            if (chartXy.BubbleIntensityMode != BubbleIntensityMode.NotSet)
                return (chartXy.BubbleIntensityMode);

            return (BubbleIntensityMode.None);
        }

        #endregion

        #region GetPointMarker

        internal Image GetPointMarker(Graphics g, PointMarkerVisualStyle style, Size size)
        {
            if (style.Type == PointMarkerType.NotSet ||
                style.Type == PointMarkerType.None || style.Type == PointMarkerType.Ellipse)
            {
                return (null);
            }

            if (_PointMarker == null)
                _PointMarker = new PointMarker();

            return (_PointMarker.GetMarkerBitmap(g, style.Type, style.PointCount,
                size, style.Rotation, style.Background, style.BorderColor, style.BorderWidth));
        }

        #endregion

        #endregion

        #region RenderDotPlot

        #region RenderHDotPlot

        private void RenderHDotPlot(Graphics g,
            ChartXy chartXy, SortedSeriesPoints ssp, ChartSeriesVisualStyle sstyle)
        {
            Image marker = PointMarkerImage;

            if (marker != null)
            {
                Size maxSize = chartXy.GetMaxDotPlotMarkerSize();

                for (int i = 0; i < ssp.Count; i++)
                {
                    SeriesPoint sp = ssp[i];

                    if (sp.Visible == true)
                    {
                        object pointValueX = chartXy.GetDataPointValueX(this, sp);

                        Point pt = chartXy.GetPointFromValue(this, 0, pointValueX);

                        Point ppt = new Point(pt.X + maxSize.Width / 2, pt.Y);

                        int dcount = ssp.CountArray[i];

                        for (int j = 0; j < dcount; j++)
                        {
                            RenderPointMarker(g, chartXy, sp, ppt, maxSize, marker);

                            ppt.X += maxSize.Width;
                        }
                    }
                }
            }
        }

        #endregion

        #region RenderVDotPlot

        private void RenderVDotPlot(Graphics g,
            ChartXy chartXy, SortedSeriesPoints ssp, ChartSeriesVisualStyle sstyle)
        {
            Image marker = PointMarkerImage;

            if (marker != null)
            {
                Size maxSize = chartXy.GetMaxDotPlotMarkerSize();

                for (int i = 0; i < ssp.Count; i++)
                {
                    SeriesPoint sp = ssp[i];

                    if (sp.Visible == true)
                    {
                        Point pt = chartXy.GetDataPointNa(this, sp, -1);
                        Point ppt = new Point(pt.X, pt.Y - maxSize.Height / 2);

                        int dcount = ssp.CountArray[i];

                        for (int j = 0; j < dcount; j++)
                        {
                            RenderPointMarker(g, chartXy, sp, ppt, maxSize, marker);

                            ppt.Y -= maxSize.Height;
                        }
                    }
                }
            }
        }

        #endregion

        #region GetDotCount

        private int GetDotCount(SeriesPoint sp)
        {
            if (sp.ValueY != null && sp.ValueY.Length > 0)
            {
                int count = 0;

                foreach (object o in sp.ValueY)
                {
                    if (o is int)
                        count += (int)o;

                    else if (o is double)
                        count += (int)Convert.ChangeType(o, typeof(int));
                }

                return (count);
            }

            return (1);
        }

        #endregion

        #endregion

        #region RenderPointPlot

        private void RenderPointPlot(Graphics g, ChartXy chartXy,
            SortedSeriesPoints ssp, bool showHull, ChartSeriesVisualStyle sstyle)
        {
            PointData pd = GatherSeriesPoints(chartXy, ssp, 0, ssp.Count, true);

            if (pd.Points.Count > 0)
            {
                PointMarkerVisualStyle pstyle = sstyle.MarkerVisualStyle;
                PointMarkerVisualStyle hstyle = GetHighlightStyle(chartXy, sstyle);

                if (showHull == true)
                    RenderConvexHull(g, chartXy, ssp, sstyle, pstyle);

                if (hstyle == null)
                {
                    Image marker = chartXy.GetPointMarker(g, pstyle);

                    if (marker != null)
                    {
                        for (int i = 0; i < pd.Points.Count; i++)
                        {
                            Point[] pts = pd.Points[i];
                            SeriesPoint[] spts = pd.SeriesPoints[i];

                            for (int j = 0; j < pts.Length; j++)
                                RenderPointMarker(g, chartXy, spts[j], pts[j], Size.Empty, marker);
                        }
                    }
                }
                else
                {
                    bool highlightSinglePoint = HighLightSinglePoint(chartXy);

                    Image highlightMarker = GetHighlightImage(g, chartXy, hstyle);

                    for (int i = 0; i < pd.Points.Count; i++)
                    {
                        Point[] pts = pd.Points[i];
                        SeriesPoint[] spts = pd.SeriesPoints[i];

                        for (int j = 0; j < pts.Length; j++)
                        {
                            Point ppt = pts[j];
                            Point ppt2 = chartXy.GetLocalAdjustedPoint(ppt);

                            Image marker = PointMarkerImage;

                            if (highlightMarker != null)
                            {
                                if (chartXy.IsCrosshairSeriesPoint(this, ppt2) == true)
                                {
                                    marker = highlightMarker;

                                    if (highlightSinglePoint == true)
                                        highlightMarker = null;
                                }
                            }

                            RenderPointMarker(g, chartXy, spts[j], ppt, Size.Empty, marker);
                        }
                    }
                }

                if (ShowEmptyPoints == true)
                    RenderEmptyPoints(g, chartXy, pd, sstyle);
            }
        }

        #region RenderPointMarker

        private void RenderPointMarker(Graphics g,
            ChartXy chartXy, SeriesPoint sp, Point pt, Size maxSize, Image marker)
        {
            if (marker != null)
            {
                ChartControl control = ChartControl;

                Image ptMarker = marker;

                Size markerSize = marker.Size;
                Size size = maxSize.IsEmpty ? markerSize : maxSize;

                sp.PointSize = size;

                Point ptc = new Point(
                    pt.X - markerSize.Width / 2,
                    pt.Y - markerSize.Height / 2);

                Rectangle r = new Rectangle(ptc, markerSize);

                if (r.IntersectsWith(RenderBounds))
                {
                    if (control.DoPreRenderSeriesPointEvent(g,
                        chartXy, this, sp, pt, size, ref ptMarker) == false)
                    {
                        if (ptMarker != null)
                        {
                            g.DrawImageUnscaled(ptMarker, ptc);

                            control.DoPostRenderSeriesPointEvent(g,
                                chartXy, this, sp, pt, ptMarker.Size, ptMarker);
                        }
                    }
                }
            }
        }

        #endregion

        #region RenderConvexHull

        private void RenderConvexHull(Graphics g, ChartXy chartXy,
            SortedSeriesPoints ssp, ChartSeriesVisualStyle sstyle, PointMarkerVisualStyle pstyle)
        {
            ConvexHullDisplayMode mode = GetConvexHullDisplayMode(chartXy);

            if (mode != ConvexHullDisplayMode.None)
            {
                if (_ConvexHullPoints == null)
                {
                    PointData pd = GatherSeriesPointsEx(chartXy, ssp, 0, ssp.Count, true);

                    _ConvexHullPoints = ConvexHull.GetConvexHull(
                        (pd.Points.Count == 1) ? pd.Points[0] : CombineListPoints(pd.Points));
                }

                if (_ConvexHullPoints.Length > 3)
                {
                    using (GraphicsPath path = new GraphicsPath())
                    {
                        path.AddPolygon(_ConvexHullPoints);

                        if ((mode & ConvexHullDisplayMode.DisplayBackground) == ConvexHullDisplayMode.DisplayBackground)
                        {
                            Rectangle r = Rectangle.Round(path.GetBounds());

                            Background bg = (sstyle.ConvexHullBackground.IsEmpty)
                                ? pstyle.Background : sstyle.ConvexHullBackground;

                            using (Brush br = bg.GetBrush(r))
                                g.FillPath(br, path);
                        }

                        if ((mode & ConvexHullDisplayMode.DisplayBorder) == ConvexHullDisplayMode.DisplayBorder)
                        {
                            Color color;
                            int width;
                            LinePattern pattern;

                            if (sstyle.ConvexHullLineStyle.IsEmpty == false)
                            {
                                color = sstyle.ConvexHullLineStyle.LineColor;
                                width = sstyle.ConvexHullLineStyle.LineWidth;
                                pattern = sstyle.ConvexHullLineStyle.LinePattern;
                            }
                            else
                            {
                                color = pstyle.BorderColor;
                                width = pstyle.BorderWidth;
                                pattern = LinePattern.Solid;
                            }

                            if (pattern != LinePattern.None)
                            {
                                using (Pen pen = new Pen(color, Dpi.Width(width)))
                                {
                                    if (pattern != LinePattern.NotSet)
                                        pen.DashStyle = (DashStyle)pattern;

                                    g.DrawPath(pen, path);
                                }
                            }
                        }
                    }
                }
            }
        }

        #region GetConvexHullDisplayMode

        private ConvexHullDisplayMode GetConvexHullDisplayMode(ChartXy chartXy)
        {
            if (ConvexHullDisplayMode != ConvexHullDisplayMode.NotSet)
                return (ConvexHullDisplayMode);

            ConvexHullDisplayMode mode = chartXy.ConvexHullDisplayMode;

            if (mode != ConvexHullDisplayMode.NotSet)
                return (mode);

            return (ConvexHullDisplayMode.None);
        }

        #endregion

        #region CombineListPoints

        private Point[] CombineListPoints(List<Point[]> plist)
        {
            int n = 0;

            foreach (Point[] points in plist)
                n += points.Length;

            Point[] fpoints = new Point[n];

            n = 0;

            foreach (Point[] points in plist)
            {
                for (int i = 0; i < points.Length; i++)
                    fpoints[n++] = points[i];
            }

            return (fpoints);
        }

        #endregion

        #endregion

        #region RenderEmptyPoints

        private void RenderEmptyPoints(Graphics g,
            ChartXy chartXy, PointData pd, ChartSeriesVisualStyle sstyle)
        {
            PointData epd = _EmptyPointData;

            if (epd != null && epd.Points.Count > 0)
            {
                PointMarkerVisualStyle pstyle = sstyle.MarkerEmptyVisualStyle;

                Image marker = GetEmptyMarkerImage(g, chartXy, pstyle);

                if (marker != null)
                {
                    for (int i = 0; i < epd.Points.Count; i++)
                    {
                        Point[] epts = epd.Points[i];
                        SeriesPoint[] septs = epd.SeriesPoints[i];

                        Point[] pts = GetEmptyPointRange(epts[0]);

                        int run = pts[0].X - pts[1].X;
                        int rise = pts[0].Y - pts[1].Y;

                        double slope = (run != 0) ? (double)rise / run : 0;
                        double b = pts[0].Y - (slope * pts[0].X);

                        for (int j = 0; j < epts.Length; j++)
                        {
                            Point ept = epts[j];
                            SeriesPoint sept = septs[j];

                            Point ppt = new Point(ept.X, (int)(slope * ept.X + b));

                            RenderPointMarker(g, chartXy, sept, ppt, Size.Empty, marker);
                        }
                    }
                }
            }
        }

        #region GetEmptyPointRange

        private Point[] GetEmptyPointRange(Point pt)
        {
            Point[] pts = new Point[2];

            pts[0] = Point.Empty;
            pts[1] = Point.Empty;

            PointData pd = _PointData;

            for (int i = 0; i < pd.Points.Count; i++)
            {
                Point[] lps = pd.Points[i];

                if (pt.X <= lps[0].X)
                {
                    pts[1] = lps[0];

                    if (i == 0)
                        pts[0] = pts[1];

                    return (pts);
                }

                pts[0] = lps[lps.Length - 1];
            }

            pts[1] = pts[0];

            return (pts);
        }

        #endregion

        #endregion

        #endregion

        #region RenderLinePlot

        private void RenderLinePlot(Graphics g,
            ChartXy chartXy, SortedSeriesPoints ssp, ChartSeriesVisualStyle sstyle)
        {
            PointData pd = GatherSeriesPoints(chartXy, ssp, 0, ssp.Count, false);

            if (pd.Points.Count > 0)
            {
                ChartLineDisplayMode lineMode = GetLineDisplayMode(chartXy);
                ChartLineAreaDisplayMode areaMode = GetAreaDisplayMode(chartXy);

                PointMarkerVisualStyle pstyle = sstyle.MarkerVisualStyle;

                RenderConvexHull(g, chartXy, ssp, sstyle, pstyle);

                if (DisplayLinePointsOnTop == true)
                    RenderLinePlotLines(g, chartXy, pd, lineMode, areaMode, sstyle);

                if ((lineMode & ChartLineDisplayMode.DisplayPoints) == ChartLineDisplayMode.DisplayPoints)
                {
                    RenderPointPlot(g, chartXy, ssp, false, sstyle);
                }
                else
                {
                    if (ShowEmptyPoints == true)
                        RenderEmptyPoints(g, chartXy, pd, sstyle);

                    RenderPointLabelPoints(g, chartXy, sstyle);

                    if (HighLightPoints(chartXy) == true)
                        RenderHighlightPoints(g, chartXy, pd, sstyle);
                }

                if (DisplayLinePointsOnTop == false)
                    RenderLinePlotLines(g, chartXy, pd, lineMode, areaMode, sstyle);
            }
        }

        #region RenderPointLabelPoints

        private void RenderPointLabelPoints(Graphics g,
            ChartXy chartXy, ChartSeriesVisualStyle sstyle)
        {
            List<PointLabelGroup> pointLabels = chartXy.PointLabels;

            if (pointLabels != null && pointLabels.Count > 0)
            {
                foreach (PointLabelGroup lg in pointLabels)
                {
                    if (lg.ChartSeries == this)
                    {
                        PointMarkerVisualStyle pstyle = sstyle.MarkerVisualStyle;

                        Image marker = chartXy.GetPointMarker(g, pstyle);

                        if (marker != null)
                        {
                            Size size = marker.Size;

                            for (int i = 0; i < lg.PointLabels.Count; i++)
                            {
                                PointLabel pl = lg.PointLabels[i];

                                if (pl.Visible == true && pl.SeriesPoint.IsEmpty == false)
                                {
                                    DataLabelVisualStyle dstyle = GetPointLabelVisualStyle(pl);

                                    if (dstyle.DrawPointMarker != Tbool.False)
                                    {
                                        SeriesPoint spt = pl.SeriesPoint;

                                        Point ppt = pl.Point;
                                        Point ppc = new Point(ppt.X, ppt.Y);

                                        RenderPointMarker(g, chartXy, spt, ppc, Size.Empty, marker);
                                    }
                                }
                            }
                        }
                        break;
                    }
                }
            }
        }

        #endregion

        #region RenderLinePlotLines

        private void RenderLinePlotLines(Graphics g, ChartXy chartXy, PointData pd,
            ChartLineDisplayMode lineMode, ChartLineAreaDisplayMode areaMode, ChartSeriesVisualStyle sstyle)
        {
            if ((lineMode & ChartLineDisplayMode.DisplayStepLine) == ChartLineDisplayMode.DisplayStepLine)
            {
                StepLineMode slm = GetStepLineMode(chartXy);

                if (slm != StepLineMode.None)
                    RenderStepLines(g, chartXy, pd, slm, areaMode, sstyle);
            }

            if ((lineMode & ChartLineDisplayMode.DisplayLine) == ChartLineDisplayMode.DisplayLine)
                RenderLines(g, chartXy, pd, lineMode, areaMode, sstyle);

            if ((lineMode & ChartLineDisplayMode.DisplaySpline) == ChartLineDisplayMode.DisplaySpline)
                RenderSplines(g, chartXy, pd, lineMode, areaMode, sstyle);

            if (ShowEmptyLines == true)
            {
                if ((lineMode & (ChartLineDisplayMode.DisplayLine | ChartLineDisplayMode.DisplaySpline)) != 0)
                    RenderEmptyLines(g, chartXy, pd.Points, areaMode, sstyle);
            }
        }

        #region GetStepLineMode

        private StepLineMode GetStepLineMode(ChartXy chartXy)
        {
            StepLineMode mode = StepLineMode;

            if (mode == StepLineMode.NotSet)
                mode = chartXy.StepLineMode;

            if (mode == StepLineMode.NotSet)
                mode = StepLineMode.HorizontalThenVertical;

            return (mode);
        }

        #endregion

        #region RenderLines

        private void RenderLines(Graphics g, ChartXy chartXy,
            PointData pd, ChartLineDisplayMode lineMode, ChartLineAreaDisplayMode areaMode, ChartSeriesVisualStyle sstyle)
        {
            ChartLineVisualStyle lstyle = sstyle.LineStyle;

            if (lstyle.LinePattern != LinePattern.None)
            {
                using (Pen pen = new Pen(lstyle.LineColor, Dpi.Width(lstyle.LineWidth)))
                {
                    if (lstyle.LinePattern != LinePattern.NotSet)
                        pen.DashStyle = (DashStyle)lstyle.LinePattern;

                    if ((lineMode & ChartLineDisplayMode.DisplayClosed) == ChartLineDisplayMode.DisplayClosed)
                    {
                        foreach (Point[] points in pd.Points)
                        {
                            if (points.Length > 1)
                                g.DrawLines(pen, points);
                        }

                        Point fp = pd.Points[0][0];
                        Point[] lps = pd.Points[pd.Points.Count - 1];
                        Point lp = lps[lps.Length - 1];

                        if (fp.Equals(lp) == false)
                            g.DrawLine(pen, lp, fp);
                    }
                    else
                    {
                        foreach (Point[] points in pd.Points)
                        {
                            if (points.Length > 1)
                            {
                                using (GraphicsPath path = new GraphicsPath())
                                {
                                    path.AddLines(points);

                                    if ((areaMode & ChartLineAreaDisplayMode.DisplayLine) == ChartLineAreaDisplayMode.DisplayLine)
                                        RenderAreaBackground(g, chartXy, points, path, sstyle.LineAreaBackground);

                                    g.DrawPath(pen, path);
                                }
                            }
                        }
                    }
                }
            }
        }

        #endregion

        #region RenderSplines

        private void RenderSplines(Graphics g, ChartXy chartXy, PointData pd,
            ChartLineDisplayMode lineMode, ChartLineAreaDisplayMode areaMode, ChartSeriesVisualStyle sstyle)
        {
            ChartLineVisualStyle lstyle = sstyle.SplineStyle;

            if (lstyle.LinePattern != LinePattern.None)
            {
                using (Pen pen = new Pen(lstyle.LineColor, Dpi.Width(lstyle.LineWidth)))
                {
                    if (lstyle.LinePattern != LinePattern.NotSet)
                        pen.DashStyle = (DashStyle)lstyle.LinePattern;

                    if ((pd.Points.Count == 1) &&
                        (lineMode & ChartLineDisplayMode.DisplayClosed) == ChartLineDisplayMode.DisplayClosed)
                    {
                        Point[] points = pd.Points[0];

                        if (points.Length > 1)
                            g.DrawClosedCurve(pen, points);
                    }
                    else
                    {
                        foreach (Point[] points in pd.Points)
                        {
                            if (points.Length > 1)
                            {
                                using (GraphicsPath path = new GraphicsPath())
                                {
                                    path.AddCurve(points);

                                    if ((areaMode & ChartLineAreaDisplayMode.DisplaySpline) == ChartLineAreaDisplayMode.DisplaySpline)
                                        RenderAreaBackground(g, chartXy, points, path, sstyle.SplineAreaBackground);

                                    g.DrawPath(pen, path);
                                }
                            }
                        }
                    }
                }
            }
        }

        #endregion

        #region RenderStepLines

        private void RenderStepLines(Graphics g, ChartXy chartXy, PointData pd,
            StepLineMode slm, ChartLineAreaDisplayMode areaMode, ChartSeriesVisualStyle sstyle)
        {
            StepLines sls = GetStepLines(chartXy);

            if (sls != StepLines.None)
            {
                PointData sd = GetStepPointData(chartXy, pd, slm);

                if (sd != null)
                {
                    SmoothingMode sm = g.SmoothingMode;
                    g.SmoothingMode = SmoothingMode.Default;

                    ChartCapLineVisualStyle lstyle = sstyle.StepLineStyle;

                    if (sls == StepLines.Both)
                    {
                        RenderStepLinesEx1(g, sd, lstyle);
                    }
                    else
                    {
                        int n = ((sls == StepLines.Horizontal && (slm == StepLineMode.HorizontalThenVertical || slm == StepLineMode.MidPoint)) ||
                                 (sls == StepLines.Vertical && slm == StepLineMode.VerticalThenHorizontal)) ? 0 : 1;

                        RenderStepLinesEx2(g, sd, n, lstyle);

                        if (sstyle.StepLineAltStyle.IsEmpty == false)
                            RenderStepLinesEx2(g, sd, n ^ 1, sstyle.StepLineAltStyle);
                    }

                    g.SmoothingMode = sm;

                    if ((areaMode & ChartLineAreaDisplayMode.DisplayStepLine) == ChartLineAreaDisplayMode.DisplayStepLine)
                    {
                        foreach (Point[] points in sd.Points)
                        {
                            using (GraphicsPath path = new GraphicsPath())
                            {
                                path.AddLines(points);

                                RenderAreaBackground(g, chartXy, points, path, sstyle.StepLineAreaBackground);
                            }
                        }
                    }
                }
            }
        }

        #region GetStepLines

        private StepLines GetStepLines(ChartXy chartXy)
        {
            StepLines mode = StepLines;

            if (mode == StepLines.NotSet)
                mode = chartXy.StepLines;

            if (mode == StepLines.NotSet)
                mode = StepLines.Both;

            return (mode);
        }

        #endregion

        #region GetStepPointData

        private PointData GetStepPointData(
            ChartXy chartXy, PointData pd, Charts.StepLineMode slm)
        {
            if (_LastStepLineMode != slm)
                _StepPointData = null;

            if (_StepPointData == null)
            {
                PointData sd = new PointData();

                sd.Points = new List<Point[]>();

                foreach (Point[] points in pd.Points)
                {
                    if (points.Length > 1)
                        sd.Points.Add(GetStepPoints(slm, points));
                }

                _StepPointData = sd;

                _LastStepLineMode = slm;
            }

            return (_StepPointData);
        }

        #region GetStepPoints

        private Point[] GetStepPoints(StepLineMode slm, Point[] pts)
        {
            if (slm == StepLineMode.HorizontalThenVertical || slm == StepLineMode.VerticalThenHorizontal)
            {
                Point[] points = new Point[pts.Length * 2 - 1];

                if (slm == StepLineMode.HorizontalThenVertical)
                {
                    for (int i = 0; i < pts.Length; i++)
                    {
                        int n = i * 2;

                        points[n] = pts[i];

                        if (i + 1 < pts.Length)
                            points[n + 1] = new Point(pts[i + 1].X, pts[i].Y);
                    }
                }
                else
                {
                    for (int i = 0; i < pts.Length; i++)
                    {
                        int n = i * 2;

                        points[n] = pts[i];

                        if (i + 1 < pts.Length)
                            points[n + 1] = new Point(pts[i].X, pts[i + 1].Y);
                    }
                }

                return (points);
            }
            else
            {
                Point[] points = new Point[pts.Length * 2];

                points[0] = pts[0];

                for (int i = 0; i < pts.Length - 1; i++)
                {
                    int n0 = i * 2 + 1;
                    int n1 = n0 + 1;

                    points[n0] = new Point((pts[i].X + pts[i + 1].X) / 2, pts[i].Y);
                    points[n1] = new Point(points[n0].X, pts[i + 1].Y);
                }

                points[points.Length - 1] = pts[pts.Length - 1];

                return (points);
            }
        }

        #endregion

        #endregion

        #region RenderStepLinesEx1

        private void RenderStepLinesEx1(Graphics g, PointData sd, ChartCapLineVisualStyle lstyle)
        {
            if (lstyle.LinePattern != LinePattern.None)
            {
                using (Pen pen = new Pen(lstyle.LineColor, Dpi.Width(lstyle.LineWidth)))
                {
                    if (lstyle.LinePattern != LinePattern.NotSet)
                        pen.DashStyle = (DashStyle)lstyle.LinePattern;

                    if (lstyle.StartCap != ChartLineCap.NotSet)
                        pen.StartCap = (LineCap)lstyle.StartCap;

                    if (lstyle.EndCap != ChartLineCap.NotSet)
                        pen.EndCap = (LineCap)lstyle.EndCap;

                    foreach (Point[] points in sd.Points)
                    {
                        if (points.Length > 1)
                            g.DrawLines(pen, points);
                    }
                }
            }
        }

        #endregion

        #region RenderStepLinesEx2

        private void RenderStepLinesEx2(Graphics g,
            PointData sd, int n, ChartCapLineVisualStyle lstyle)
        {
            if (lstyle.LinePattern != LinePattern.None)
            {
                using (Pen pen = new Pen(lstyle.LineColor, Dpi.Width(lstyle.LineWidth)))
                {
                    if (lstyle.LinePattern != LinePattern.NotSet)
                        pen.DashStyle = (DashStyle)lstyle.LinePattern;

                    if (lstyle.StartCap != ChartLineCap.NotSet)
                        pen.StartCap = (LineCap)lstyle.StartCap;

                    if (lstyle.EndCap != ChartLineCap.NotSet)
                        pen.EndCap = (LineCap)lstyle.EndCap;

                    foreach (Point[] points in sd.Points)
                    {
                        if (points.Length > 1)
                        {
                            for (int i = n; i < points.Length - 1; i += 2)
                            {
                                Point pt1 = points[i];
                                Point pt2 = points[i + 1];

                                g.DrawLine(pen, pt1, pt2);
                            }
                        }
                    }
                }
            }
        }

        #endregion

        #endregion

        #region RenderEmptyLines

        private void RenderEmptyLines(Graphics g, ChartXy chartXy,
            List<Point[]> lpoints, ChartLineAreaDisplayMode areaMode, ChartSeriesVisualStyle sstyle)
        {
            if (lpoints.Count > 1)
            {
                ChartLineVisualStyle lstyle = sstyle.EmptyStyle;

                if (lstyle.LinePattern != LinePattern.None)
                {
                    Point[] points = new Point[(lpoints.Count - 1) * 2];
                    Point[][] epoints = new Point[lpoints.Count - 1][];

                    for (int i = 0; i < lpoints.Count - 1; i++)
                    {
                        Point[] pts1 = lpoints[i];
                        Point[] pts2 = lpoints[i + 1];

                        epoints[i] = new Point[2];

                        epoints[i][0] = pts1[pts1.Length - 1];
                        epoints[i][1] = pts2[0];
                    }

                    for (int i = 0; i < points.Length / 2; i++)
                    {
                        using (GraphicsPath path = new GraphicsPath())
                        {
                            path.AddLines(epoints[i]);

                            if ((areaMode & ChartLineAreaDisplayMode.DisplayEmptyLine) == ChartLineAreaDisplayMode.DisplayEmptyLine)
                                RenderAreaBackground(g, chartXy, epoints[i], path, sstyle.EmptyAreaBackground);

                            using (Pen pen = new Pen(lstyle.LineColor, Dpi.Width(lstyle.LineWidth)))
                            {
                                if (lstyle.LinePattern != LinePattern.NotSet)
                                    pen.DashStyle = (DashStyle)lstyle.LinePattern;

                                g.DrawPath(pen, path);
                            }
                        }
                    }
                }
            }
        }

        #endregion

        #region RenderAreaBackground

        private void RenderAreaBackground(Graphics g,
            ChartXy chartXy, Point[] points, GraphicsPath path, Background background)
        {
            bool backEmpty = (background == null || background.IsEmpty == true);

            if (backEmpty == true)
                background = new Background(Color.FromArgb(100, DefaultPaletteColor));

            if (background != null && background.IsEmpty == false)
            {
                int y = chartXy.ContentBoundsEx.Bottom;

                if (AreaBaseValue != null)
                {
                    ChartAxis axis = _AxisY ?? chartXy.AxisY;

                    y = chartXy.GetDataPointY(axis, AreaBaseValue);
                }

                using (GraphicsPath path2 = new GraphicsPath())
                {
                    path2.AddLine(new Point(points[0].X, y), points[0]);
                    path2.AddPath(path, true);
                    path2.AddLine(points[points.Length - 1], new Point(points[points.Length - 1].X, y));

                    path2.CloseFigure();

                    Rectangle r = Rectangle.Round(path2.GetBounds());

                    using (Brush br = background.GetBrush(r))
                        g.FillPath(br, path2);
                }
            }

            if (backEmpty == true)
                background.Dispose();
        }

        #endregion

        #endregion

        #region RenderHighlightPoints

        private void RenderHighlightPoints(Graphics g,
            ChartXy chartXy, PointData pd, ChartSeriesVisualStyle sstyle)
        {
            PointMarkerVisualStyle hstyle = GetHighlightStyle(chartXy, sstyle);

            Image marker = GetHighlightImage(g, chartXy, hstyle);

            if (marker != null)
            {
                Size size = marker.Size;

                Point pt = chartXy.GetLocalAdjustedPoint(Point.Empty);

                for (int i = 0; i < pd.Points.Count; i++)
                {
                    Point[] pts = pd.Points[i];
                    SeriesPoint[] spts = pd.SeriesPoints[i];

                    for (int j = 0; j < pts.Length; j++)
                    {
                        Point ppt = pts[j];
                        Point ppc = new Point(ppt.X, ppt.Y);
                        Point lppc = new Point(ppt.X + pt.X, ppt.Y + pt.Y);

                        if (chartXy.IsCrosshairSeriesPoint(this, lppc) == true)
                        {
                            RenderPointMarker(g, chartXy, spts[j], ppc, Size.Empty, marker);

                            if (HighLightSinglePoint(chartXy) == true)
                                break;
                        }
                    }
                }
            }
        }

        #endregion

        #region GetLineDisplayMode

        private ChartLineDisplayMode GetLineDisplayMode(ChartXy chartXy)
        {
            ChartLineDisplayMode mode = ChartLineDisplayMode;

            if (mode == ChartLineDisplayMode.NotSet)
                mode = chartXy.ChartLineDisplayMode;

            if (mode == ChartLineDisplayMode.NotSet)
                mode = ChartLineDisplayMode.DisplayLine;

            return (mode);
        }

        #endregion

        #region GetAreaDisplayMode

        private ChartLineAreaDisplayMode GetAreaDisplayMode(ChartXy chartXy)
        {
            ChartLineAreaDisplayMode mode = ChartLineAreaDisplayMode;

            if (mode == ChartLineAreaDisplayMode.NotSet)
                mode = chartXy.ChartLineAreaDisplayMode;

            if (mode == ChartLineAreaDisplayMode.NotSet)
                mode = ChartLineAreaDisplayMode.None;

            return (mode);
        }

        #endregion

        #endregion

        #region RenderStockPlot

        #region RenderHStockPlot

        private void RenderHStockPlot(ChartRenderInfo renderInfo,
            ChartXy chartXy, SortedSeriesPoints ssp, ChartSeriesVisualStyle sstyle)
        {
            HiLoRenderData rd = new HiLoRenderData(chartXy, AxisX ?? chartXy.AxisX);

            rd.SeriesStyle = sstyle;

            for (int i = 0; i < ssp.Count; i++)
            {
                SeriesPoint sp = ssp[i];

                if (sp.Visible == true)
                {
                    rd.Sp = sp;
                    rd.Spt = sp.Point[0];
                    rd.Index = i;

                    RenderHStock(renderInfo, rd);
                }
            }
        }

        #region RenderHStock

        private void RenderHStock(ChartRenderInfo renderInfo, HiLoRenderData rd)
        {
            Graphics g = renderInfo.Graphics;

            rd.Value = GetHStockValues(rd.ChartXy, rd.Sp);

            if (rd.Value[StockHigh] != int.MinValue)
            {
                Point pt = rd.ChartXy.GetDataPointEx(this, rd.Sp, 0);

                Rectangle r = GetHBoundingRect(rd, pt);

                if (r.IntersectsWith(RenderBounds) == true)
                {
                    int y = pt.Y + BarOffset;

                    rd.Sp.PointSize = new Size(5, BarWidth / 3);

                    switch (HiLoBarType)
                    {
                        case HiLoBarType.Box:
                        case HiLoBarType.Candle:
                            RenderHStockBox(g, rd, y);
                            break;

                        default:
                            RenderHStockHiLo(g, rd, y);
                            break;
                    }
                }
            }
        }

        #region GetHBoundingRect

        private Rectangle GetHBoundingRect(HiLoRenderData rd, Point pt)
        {
            int x1 = rd.Value[StockHigh];
            int x2 = rd.Value[StockLow];

            if (rd.Value[StockOpen] != int.MinValue)
            {
                if (rd.Value[StockOpen] > x1)
                    x1 = rd.Value[StockOpen];

                if (rd.Value[StockOpen] < x2)
                    x2 = rd.Value[StockOpen];
            }

            if (rd.Value[StockClose] != int.MinValue)
            {
                if (rd.Value[StockClose] > x1)
                    x1 = rd.Value[StockClose];

                if (rd.Value[StockClose] < x2)
                    x2 = rd.Value[StockClose];
            }

            int y = pt.Y + BarOffset - BarWidth / 2;

            return (new Rectangle(x2, y, x1 - x2, BarWidth));
        }

        #endregion

        #region RenderHStockBox

        private void RenderHStockBox(Graphics g, HiLoRenderData rd, int y)
        {
            int x1 = rd.Value[StockClose];
            int x2 = rd.Value[StockOpen];

            if (rd.Value[StockOpen] != int.MinValue && rd.Value[StockClose] != int.MinValue)
            {
                if (rd.Value[StockOpen] < rd.Value[StockClose])
                {
                    x1 = rd.Value[StockOpen];
                    x2 = rd.Value[StockClose];
                }

                if (rd.Value[StockLow] > x1)
                    rd.Value[StockLow] = x1;

                if (rd.Value[StockHigh] < x2)
                    rd.Value[StockHigh] = x2;

                rd.IsAlternate = (rd.Value[StockOpen] > rd.Value[StockClose]);

                RenderHStockBoxWhisker(g, rd,
                    rd.Value[StockLow], x1, y, HiLoBarSegment.LowWhisker);

                RenderHStockBoxWhisker(g, rd,
                    x2, rd.Value[StockHigh], y, HiLoBarSegment.HighWhisker);

                RenderHStockBoxOpenClose(g, rd, x1, x2, y);
            }
            else
            {
                int x = (x1 != int.MinValue) ? x1 : x2;

                if (x != int.MinValue)
                {
                    if (x > rd.Value[StockHigh])
                        rd.Value[StockHigh] = x;

                    if (x < rd.Value[StockLow])
                        rd.Value[StockLow] = x;
                }

                if (x < rd.Value[StockHigh] && x > rd.Value[StockLow])
                {
                    RenderHStockBoxWhisker(g, rd, x, rd.Value[StockHigh], y, HiLoBarSegment.HighWhisker);
                    RenderHStockBoxWhisker(g, rd, rd.Value[StockLow], x, y, HiLoBarSegment.LowWhisker);

                    RenderHStockBoxOpenClose(g, rd, x, x, y);
                }
                else
                {
                    RenderHStockBoxWhisker(g, rd,
                        rd.Value[StockLow], rd.Value[StockHigh], y, HiLoBarSegment.CenterLine);

                    if (x != int.MinValue)
                        RenderHStockBoxOpenClose(g, rd, x, x, y);
                }
            }
        }

        #region RenderHStockBoxWhisker

        private void RenderHStockBoxWhisker(Graphics g,
            HiLoRenderData rd, int x1, int x2, int y, HiLoBarSegment segment)
        {
            if (x2 > x1)
            {
                Point pt1 = new Point(x1, y);
                Point pt2 = new Point(x2 + 1, y);

                RenderBoxWhisker(g, rd, pt1, pt2, segment);
            }
        }

        #endregion

        #region RenderHStockBoxOpenClose

        private void RenderHStockBoxOpenClose(
            Graphics g, HiLoRenderData rd, int x1, int x2, int y)
        {
            if (x2 == x1)
            {
                x1--;
                x2++;
            }

            x2++;

            Point pt1 = new Point(x1, y - BarWidth / 2);
            Point pt2 = new Point(x2, pt1.Y + BarWidth);

            int lw = RenderStockBox(g, rd, pt1, pt2);

            Rectangle r = new Rectangle(pt1.X, pt1.Y, pt2.X - pt1.X, pt2.Y - pt1.Y);

            if (r.Width > 0 && r.Height > 0)
            {
                if (GetBarShading(rd.ChartXy) == true)
                {
                    ChartControl chartControl = ChartControl;

                    if (chartControl.DoPreRenderSeriesHiloBarEvent(
                        g, rd.ChartXy, this, rd, pt1, pt2, HiLoBarSegment.BarShading) == false)
                    {
                        RenderHBarShading(g, r, r, BarSegment.Left);

                        chartControl.DoPostRenderSeriesHiLoBarEvent(
                            g, rd.ChartXy, this, rd, pt1, pt2, HiLoBarSegment.BarShading);
                    }
                }
            }
        }

        #endregion

        #endregion

        #region RenderHStockBoxMedian

        private void RenderHStockBoxMedian(
            Graphics g, HiLoRenderData rd, int y, int x1, int x2)
        {
            if (rd.Value.Length > StockMedian)
            {
                int x3 = rd.Value[StockMedian];

                if (x3 > x1 && x3 < x2)
                {
                    Point pt1 = new Point(x3, y);
                    Point pt2 = new Point(x3, y + BarWidth - 1);

                    ChartControl chartControl = ChartControl;

                    if (chartControl.DoPreRenderSeriesHiloBarEvent(
                        g, rd.ChartXy, this, rd, pt1, pt2, HiLoBarSegment.MedianLine) == false)
                    {
                        ChartLineVisualStyle lstyle = GetSegLineStyle(rd, HiLoBarSegment.MedianLine);

                        if (lstyle.LinePattern != LinePattern.None)
                        {
                            using (Pen pen = new Pen(lstyle.LineColor, Dpi.Width(lstyle.LineWidth)))
                            {
                                if (lstyle.LinePattern != LinePattern.NotSet)
                                    pen.DashStyle = (DashStyle)lstyle.LinePattern;

                                if (lstyle.LineWidth > 1)
                                    pt2.Y++;

                                g.DrawLine(pen, pt1, pt2);
                            }
                        }

                        chartControl.DoPostRenderSeriesHiLoBarEvent(
                           g, rd.ChartXy, this, rd, pt1, pt2, HiLoBarSegment.MedianLine);
                    }
                }
            }
        }

        #endregion

        #region RenderHStockHiLo

        private void RenderHStockHiLo(Graphics g, HiLoRenderData rd, int y)
        {
            int x1, x2, x3, x4;
            NormalizeHiLoValues(rd, out x1, out x2, out x3, out x4);

            ChartLineVisualStyle ostyle, cstyle;
            NormalizeHiLoStyles(rd, out ostyle, out cstyle);

            if (rd.Value[StockOpen] != int.MinValue)
            {
                Point pt1 = new Point(x2, y - BarWidth / 2);
                Point pt2 = new Point(pt1.X, pt1.Y + BarWidth / 2);

                RenderHiLoWhisker(g, rd, pt1, pt2, ostyle, HiLoBarSegment.OpenWhisker);
            }

            if (rd.Value[StockClose] != int.MinValue)
            {
                Point pt1 = new Point(x3, y);
                Point pt2 = new Point(pt1.X, pt1.Y + BarWidth / 2 + 1);

                RenderHiLoWhisker(g, rd, pt1, pt2, cstyle, HiLoBarSegment.CloseWhisker);
            }

            if (rd.IsAlternate == false)
            {
                int x = x2;
                x2 = x3;
                x3 = x;

                ChartLineVisualStyle style = ostyle;
                ostyle = cstyle;
                cstyle = ostyle;
            }

            if ((rd.IsAlternate == false && _RenderFullDefRange == true) ||
                (rd.IsAlternate == true && _RenderFullAltRange == true))
            {
                RenderHiLoRange(g, rd,
                    new Point(x1, y), new Point(x4, y), HiLoBarSegment.FullRange);
            }
            else
            {
                // Open value either not specified or is
                // set to High value.

                if (x1 == x2 && x3 != x4)
                    x2 = x3;

                if (x2 < x1)
                {
                    int n = (ostyle != null) ? (ostyle.LineWidth + 1) / 2 : 1;

                    RenderHiLoRange(g, rd,
                        new Point(x1, y), new Point(x2 + n, y), HiLoBarSegment.HighWhisker);
                }

                if (x3 > x4)
                {
                    int n = 1;

                    // Low segment extends to the top.

                    if (x3 == x1)
                        n = (cstyle.LineWidth + 1) / 2;

                    // We have a Center segment.

                    else if (x3 != x2)
                        n = -cstyle.LineWidth / 2;

                    RenderHiLoRange(g, rd,
                        new Point(x3 + n, y), new Point(x4, y), HiLoBarSegment.LowWhisker);
                }

                if (x2 > x3 || (x1 == x2 && x3 == x4))
                {
                    ChartLineVisualStyle y2Style = (x2 == rd.Value[StockOpen]) ? ostyle : cstyle;
                    ChartLineVisualStyle y3Style = (x3 == rd.Value[StockOpen]) ? ostyle : cstyle;

                    if (y2Style != null)
                        x2 += ((y2Style.LineWidth + 1) / 2);

                    if (y3Style != null)
                        x3 -= (y3Style.LineWidth / 2);

                    RenderHiLoRange(g, rd,
                        new Point(x2, y), new Point(x3, y), HiLoBarSegment.CenterLine);
                }
            }
        }

        #endregion

        #endregion

        #endregion

        #region RenderVStockPlot

        private void RenderVStockPlot(ChartRenderInfo renderInfo,
            ChartXy chartXy, SortedSeriesPoints ssp, ChartSeriesVisualStyle sstyle)
        {
            HiLoRenderData rd = new HiLoRenderData(chartXy, AxisY ?? chartXy.AxisY);

            rd.SeriesStyle = sstyle;

            for (int i = 0; i < ssp.Count; i++)
            {
                SeriesPoint sp = ssp[i];

                if (sp.Visible == true)
                {
                    if (sp.ValueY.Length > 0)
                    {
                        rd.Sp = sp;
                        rd.Spt = sp.Point[0];
                        rd.Index = i;

                        rd.IsAlternate = false;

                        RenderVStock(renderInfo, rd);
                    }
                }
            }
        }

        #region RenderVStock

        private void RenderVStock(ChartRenderInfo renderInfo, HiLoRenderData rd)
        {
            Graphics g = renderInfo.Graphics;

            rd.Value = GetVStockValues(rd.ChartXy, rd.Sp);

            if (rd.Value[StockHigh] != int.MinValue)
            {
                Point pt = rd.ChartXy.GetDataPointEx(this, rd.Sp, 0);

                Rectangle r = GetVBoundingRect(rd, pt);

                if (r.IntersectsWith(RenderBounds) == true)
                {
                    int x = pt.X + BarOffset;

                    rd.Sp.PointSize = new Size(BarWidth / 3, 5);

                    switch (HiLoBarType)
                    {
                        case HiLoBarType.Box:
                        case HiLoBarType.Candle:
                            RenderVStockBox(g, rd, x);
                            break;

                        default:
                            RenderVStockHiLo(g, rd, x);
                            break;
                    }
                }
            }
        }

        #region GetVBoundingRect

        private Rectangle GetVBoundingRect(HiLoRenderData rd, Point pt)
        {
            int y1 = rd.Value[StockHigh];
            int y2 = rd.Value[StockLow];

            if (rd.Value[StockOpen] != int.MinValue)
            {
                if (y1 > rd.Value[StockOpen])
                    y1 = rd.Value[StockOpen];

                if (y2 < rd.Value[StockOpen])
                    y2 = rd.Value[StockOpen];
            }

            if (rd.Value[StockClose] != int.MinValue)
            {
                if (y1 > rd.Value[StockClose])
                    y1 = rd.Value[StockClose];

                if (y2 < rd.Value[StockClose])
                    y2 = rd.Value[StockClose];
            }

            int x = pt.X + BarOffset - BarWidth / 2;

            return (new Rectangle(x, y1, BarWidth, y2 - y1));
        }

        #endregion

        #region RenderVStockBox

        private void RenderVStockBox(Graphics g, HiLoRenderData rd, int x)
        {
            int y1 = rd.Value[StockOpen];
            int y2 = rd.Value[StockClose];

            if (rd.Value[StockOpen] != int.MinValue && rd.Value[StockClose] != int.MinValue)
            {
                if (rd.Value[StockOpen] > rd.Value[StockClose])
                {
                    y1 = rd.Value[StockClose];
                    y2 = rd.Value[StockOpen];
                }

                if (rd.Value[StockHigh] > y1)
                    rd.Value[StockHigh] = y1;

                if (rd.Value[StockLow] < y2)
                    rd.Value[StockLow] = y2;

                rd.IsAlternate = (rd.Value[StockOpen] < rd.Value[StockClose]);

                RenderVStockBoxWhisker(g, rd, x,
                    rd.Value[StockHigh], y1, HiLoBarSegment.HighWhisker);

                RenderVStockBoxWhisker(g, rd, x,
                    y2, rd.Value[StockLow], HiLoBarSegment.LowWhisker);

                RenderVStockBoxOpenClose(g, rd, x, y1, y2);
            }
            else
            {
                int y = (y1 != int.MinValue) ? y1 : y2;

                if (y != int.MinValue)
                {
                    if (y < rd.Value[StockHigh])
                        rd.Value[StockHigh] = y;

                    if (y > rd.Value[StockLow])
                        rd.Value[StockLow] = y;
                }

                if (y > rd.Value[StockHigh] && y < rd.Value[StockLow])
                {
                    RenderVStockBoxWhisker(g, rd, x, rd.Value[StockHigh], y, HiLoBarSegment.HighWhisker);
                    RenderVStockBoxWhisker(g, rd, x, y, rd.Value[StockLow], HiLoBarSegment.LowWhisker);

                    RenderVStockBoxOpenClose(g, rd, x, y, y);
                }
                else
                {
                    RenderVStockBoxWhisker(g, rd, x,
                        rd.Value[StockHigh], rd.Value[StockLow], HiLoBarSegment.CenterLine);

                    if (y != int.MinValue)
                        RenderVStockBoxOpenClose(g, rd, x, y, y);
                }
            }
        }

        #region RenderVStockBoxWhisker

        private void RenderVStockBoxWhisker(Graphics g,
            HiLoRenderData rd, int x, int y1, int y2, HiLoBarSegment segment)
        {
            if (y2 > y1)
            {
                Point pt1 = new Point(x, y1);
                Point pt2 = new Point(x, y2 + 1);

                RenderBoxWhisker(g, rd, pt1, pt2, segment);
            }
        }

        #endregion

        #region RenderVStockBoxOpenClose

        private void RenderVStockBoxOpenClose(
            Graphics g, HiLoRenderData rd, int x, int y1, int y2)
        {
            if (y2 == y1)
            {
                y1--;
                y2++;
            }

            y2++;

            Point pt1 = new Point(x - BarWidth / 2, y1);
            Point pt2 = new Point(pt1.X + BarWidth, y2);

            int lw = RenderStockBox(g, rd, pt1, pt2);

            Rectangle r = new Rectangle(pt1.X, pt1.Y, pt2.X - pt1.X, pt2.Y - pt1.Y);

            if (r.Width > 0 && r.Height > 0)
            {
                if (GetBarShading(rd.ChartXy) == true)
                {
                    ChartControl chartControl = ChartControl;

                    if (chartControl.DoPreRenderSeriesHiloBarEvent(
                        g, rd.ChartXy, this, rd, pt1, pt2, HiLoBarSegment.BarShading) == false)
                    {

                        RenderVBarShading(g, r, r, BarSegment.Top);

                        chartControl.DoPostRenderSeriesHiLoBarEvent(
                            g, rd.ChartXy, this, rd, pt1, pt2, HiLoBarSegment.BarShading);
                    }
                }
            }
        }

        #endregion

        #endregion

        #region RenderVStockBoxMedian

        private void RenderVStockBoxMedian(
            Graphics g, HiLoRenderData rd, int x, int y1, int y2)
        {
            if (rd.Value.Length > StockMedian)
            {
                int y3 = rd.Value[StockMedian];

                if (y3 > y1 && y3 < y2)
                {
                    Point pt1 = new Point(x, y3);
                    Point pt2 = new Point(x + BarWidth - 1, y3);

                    ChartControl chartControl = ChartControl;

                    if (chartControl.DoPreRenderSeriesHiloBarEvent(
                        g, rd.ChartXy, this, rd, pt1, pt2, HiLoBarSegment.MedianLine) == false)
                    {
                        ChartLineVisualStyle lstyle = GetSegLineStyle(rd, HiLoBarSegment.MedianLine);

                        if (lstyle.LinePattern != LinePattern.None)
                        {
                            using (Pen pen = new Pen(lstyle.LineColor, lstyle.LineWidth))
                            {
                                if (lstyle.LinePattern != LinePattern.NotSet)
                                    pen.DashStyle = (DashStyle)lstyle.LinePattern;

                                if (lstyle.LineWidth > 1)
                                    pt2.X++;

                                g.DrawLine(pen, pt1, pt2);
                            }
                        }

                        chartControl.DoPostRenderSeriesHiLoBarEvent(
                            g, rd.ChartXy, this, rd, pt1, pt2, HiLoBarSegment.MedianLine);
                    }
                }
            }
        }

        #endregion

        #region RenderVStockHiLo

        private void RenderVStockHiLo(Graphics g, HiLoRenderData rd, int x)
        {
            int y1, y2, y3, y4;
            NormalizeHiLoValues(rd, out y1, out y2, out y3, out y4);

            ChartLineVisualStyle ostyle, cstyle;
            NormalizeHiLoStyles(rd, out ostyle, out cstyle);

            if (rd.Value[StockOpen] != int.MinValue)
            {
                Point pt1 = new Point(x - BarWidth / 2, y2);
                Point pt2 = new Point(pt1.X + BarWidth / 2, pt1.Y);

                RenderHiLoWhisker(g, rd, pt1, pt2, ostyle, HiLoBarSegment.OpenWhisker);
            }

            if (rd.Value[StockClose] != int.MinValue)
            {
                Point pt1 = new Point(x + 1, y3);
                Point pt2 = new Point(pt1.X + BarWidth / 2, pt1.Y);

                RenderHiLoWhisker(g, rd, pt1, pt2, cstyle, HiLoBarSegment.CloseWhisker);
            }

            NormalizeHiLoDir(rd, ref y2, ref y3, ref ostyle, ref cstyle);

            if ((rd.IsAlternate == false && _RenderFullDefRange == true) ||
                (rd.IsAlternate == true && _RenderFullAltRange == true))
            {
                RenderHiLoRange(g, rd,
                    new Point(x, y1), new Point(x, y4), HiLoBarSegment.FullRange);
            }
            else
            {
                if (y1 == y2 && y3 != y4)
                    y2 = y3;

                // High segment

                if (y2 > y1)
                {
                    int n = (ostyle != null) ? ostyle.LineWidth / 2 : 0;

                    RenderHiLoRange(g, rd,
                        new Point(x, y1), new Point(x, y2 - n), HiLoBarSegment.HighWhisker);
                }

                // Low segment

                if (y3 < y4)
                {
                    int n = 0;

                    if (y3 == y1)
                        n = -cstyle.LineWidth / 2;

                    else if (y3 != y2)
                        n = (cstyle.LineWidth + 1) / 2;

                    RenderHiLoRange(g, rd,
                        new Point(x, y3 + n), new Point(x, y4), HiLoBarSegment.LowWhisker);
                }

                // Center segment.

                if (y2 < y3 || (y1 == y2 && y3 == y4))
                {
                    ChartLineVisualStyle y2Style = (y2 == rd.Value[StockOpen]) ? ostyle : cstyle;
                    ChartLineVisualStyle y3Style = (y3 == rd.Value[StockOpen]) ? ostyle : cstyle;

                    if (y2Style != null)
                        y2 -= (y2Style.LineWidth / 2);

                    if (y3Style != null)
                        y3 += ((y3Style.LineWidth + 1) / 2);

                    RenderHiLoRange(g, rd,
                        new Point(x, y2), new Point(x, y3), HiLoBarSegment.CenterLine);
                }
            }
        }

        #endregion

        #endregion

        #endregion

        #region GetHStockValues

        internal int[] GetHStockValues(ChartXy chartXy, SeriesPoint sp)
        {
            ChartAxis axis = AxisX ?? chartXy.AxisX;

            int[] values = new int[Math.Max(4, sp.ValueY.Length)];

            for (int i = 0; i < sp.ValueY.Length; i++)
                values[i] = chartXy.GetDataPointX(axis, sp.ValueY[i]);

            NormalizeStockValues(sp, values);

            return (values);
        }

        #endregion

        #region GetVStockValues

        internal int[] GetVStockValues(ChartXy chartXy, SeriesPoint sp)
        {
            ChartAxis axis = AxisY ?? chartXy.AxisY;

            int[] values = new int[Math.Max(4, sp.ValueY.Length)];

            for (int i = 0; i < sp.ValueY.Length; i++)
                values[i] = chartXy.GetDataPointY(axis, sp.ValueY[i]);

            NormalizeStockValues(sp, values);

            return (values);
        }

        #endregion

        #region NormalizeStockValues

        private void NormalizeStockValues(SeriesPoint sp, int[] values)
        {
            for (int i = sp.ValueY.Length; i < values.Length; i++)
                values[i] = int.MinValue;

            if (values[StockLow] == int.MinValue)
                values[StockLow] = values[StockHigh];

            if ((IsRotated == true && values[StockLow] > values[StockHigh]) ||
                (IsRotated == false && values[StockLow] < values[StockHigh]))
            {
                int temp = values[StockLow];
                values[StockLow] = values[StockHigh];
                values[StockHigh] = temp;
            }
        }

        #endregion

        #region NormalizeHiLoValues

        private void NormalizeHiLoValues(
            HiLoRenderData rd, out int v1, out int v2, out int v3, out int v4)
        {
            v1 = rd.Value[StockHigh];
            v4 = rd.Value[StockLow];

            v2 = (rd.Value[StockOpen] != int.MinValue) ? rd.Value[StockOpen] : v1;
            v3 = (rd.Value[StockClose] != int.MinValue) ? rd.Value[StockClose] : v4;

            if (v1 > v4)
            {
                if (v1 < v2)
                    v1 = v2;

                if (v4 > v3)
                    v4 = v3;

                rd.IsAlternate = (v2 > v3);
            }
            else
            {
                if (v1 > v2)
                    v1 = v2;

                if (v4 < v3)
                    v4 = v3;

                rd.IsAlternate = (v2 < v3);
            }
        }

        #endregion

        #region NormalizeHiLoDir

        private void NormalizeHiLoDir(HiLoRenderData rd,
            ref int v1, ref int v2, ref ChartLineVisualStyle style1, ref ChartLineVisualStyle style2)
        {
            if (rd.IsAlternate == false)
            {
                int y = v1;
                v1 = v2;
                v2 = y;

                ChartLineVisualStyle style = style1;
                style1 = style2;
                style2 = style1;
            }
        }

        #endregion

        #region NormalizeHiLoStyles

        private void NormalizeHiLoStyles(HiLoRenderData rd,
            out ChartLineVisualStyle ostyle, out ChartLineVisualStyle cstyle)
        {
            ostyle = (rd.Value[StockOpen] != int.MinValue) ? GetSegLineStyle(rd, HiLoBarSegment.OpenWhisker) : null;
            cstyle = (rd.Value[StockClose] != int.MinValue) ? GetSegLineStyle(rd, HiLoBarSegment.CloseWhisker) : null;

            rd.EndDelta = GetHiLoEndDelta(ostyle, cstyle);
        }

        #region GetHiLoEndDelta

        private int GetHiLoEndDelta(
            ChartLineVisualStyle ostyle, ChartLineVisualStyle cstyle)
        {
            int delta = 0;

            if (ostyle != null)
            {
                if (ostyle.LineWidth > 1)
                {
                    if (ostyle.LinePattern != LinePattern.None)
                        delta = (ostyle.LineWidth + 1) / 2;
                }
            }

            if (cstyle != null)
            {
                if (cstyle.LineWidth > 1)
                {
                    if (cstyle.LinePattern != LinePattern.None)
                        delta = Math.Max(delta, (cstyle.LineWidth + 1) / 2);
                }
            }

            return (delta);
        }

        #endregion

        #endregion

        #region RenderBoxWhisker

        private void RenderBoxWhisker(Graphics g,
            HiLoRenderData rd, Point pt1, Point pt2, HiLoBarSegment segment)
        {
            ChartXy chartXy = rd.ChartXy;
            ChartControl chartControl = ChartControl;

            SmoothingMode sm = g.SmoothingMode;
            g.SmoothingMode = SmoothingMode.None;

            if (chartControl.DoPreRenderSeriesHiloBarEvent(g, chartXy, this, rd, pt1, pt2, segment) == false)
            {
                ChartLineVisualStyle lstyle = GetSegLineStyle(rd, segment);

                if (lstyle.LinePattern != LinePattern.None)
                {
                    using (Pen pen = new Pen(lstyle.LineColor, Dpi.Width(lstyle.LineWidth)))
                    {
                        if (lstyle.LinePattern != LinePattern.NotSet)
                            pen.DashStyle = (DashStyle)lstyle.LinePattern;

                        Point pt3 = pt2;

                        if (lstyle.LineWidth == 1)
                        {
                            if (pt1.X == pt2.X)
                                pt3.Y--;
                            else
                                pt3.X--;
                        }

                        g.DrawLine(pen, pt1, pt3);
                    }
                }

                chartControl.DoPostRenderSeriesHiLoBarEvent(g, chartXy, this, rd, pt1, pt2, segment);
            }

            if (rd.SeriesStyle.HiLoBarVisualStyle.ShowWhiskerCaps == Tbool.True)
                RenderWhiskerCap(g, rd, pt1, pt2, segment);

            g.SmoothingMode = sm;
        }

        #region RenderWhiskerCap

        private void RenderWhiskerCap(Graphics g,
            HiLoRenderData rd, Point pt1, Point pt2, HiLoBarSegment segment)
        {
            if (segment == HiLoBarSegment.HighWhisker || segment == HiLoBarSegment.LowWhisker)
            {
                HiLoBarSegment capSegment = (segment == HiLoBarSegment.HighWhisker)
                    ? HiLoBarSegment.HighWhiskerCap : HiLoBarSegment.LowWhiskerCap;

                GetWhiskerCapPoints(segment, ref pt1, ref pt2);

                ChartControl chartControl = ChartControl;

                if (chartControl.DoPreRenderSeriesHiloBarEvent(
                    g, rd.ChartXy, this, rd, pt1, pt2, capSegment) == false)
                {
                    ChartLineVisualStyle lstyle = GetSegLineStyle(rd, capSegment);

                    if (lstyle.LinePattern != LinePattern.None)
                    {
                        using (Pen pen = new Pen(lstyle.LineColor, lstyle.LineWidth))
                        {
                            if (lstyle.LinePattern != LinePattern.NotSet)
                                pen.DashStyle = (DashStyle)lstyle.LinePattern;

                            if (lstyle.LineWidth == 1)
                            {
                                if (pt1.X == pt2.X)
                                    pt2.Y--;
                                else
                                    pt2.X--;
                            }

                            g.DrawLine(pen, pt1, pt2);
                        }
                    }

                    chartControl.DoPostRenderSeriesHiLoBarEvent(
                        g, rd.ChartXy, this, rd, pt1, pt2, capSegment);
                }
            }
        }

        #region GetWhiskerCapPoints

        private void GetWhiskerCapPoints(
            HiLoBarSegment segment, ref Point pt1, ref Point pt2)
        {
            int n = BarWidth / 3;

            switch (segment)
            {
                case HiLoBarSegment.HighWhisker:
                    if (pt1.X == pt2.X)
                    {
                        pt1.X -= n;
                        pt2.X += n + 1;
                        pt2.Y = pt1.Y;
                    }
                    else
                    {
                        pt1.Y -= n;
                        pt2.Y += n + 1;
                        pt1.X = pt2.X;
                    }
                    break;

                case HiLoBarSegment.LowWhisker:
                    if (pt1.X == pt2.X)
                    {
                        pt1.X -= n;
                        pt2.X += n + 1;
                        pt1.Y = pt2.Y;
                    }
                    else
                    {
                        pt1.Y -= n;
                        pt2.Y += n + 1;
                        pt2.X = pt1.X;
                    }
                    break;
            }
        }

        #endregion

        #endregion

        #endregion

        #region RenderStockBox

        private int RenderStockBox(
            Graphics g, HiLoRenderData rd, Point pt1, Point pt2)
        {
            int lineWidth = 0;

            Rectangle r = new Rectangle(pt1.X, pt1.Y, pt2.X - pt1.X, pt2.Y - pt1.Y);

            if (r.Width > 0 && r.Height > 0)
            {
                ChartXy chartXy = rd.ChartXy;
                ChartControl chartControl = ChartControl;

                SmoothingMode sm = g.SmoothingMode;
                g.SmoothingMode = SmoothingMode.None;

                if (chartControl.DoPreRenderSeriesHiloBarEvent(
                    g, chartXy, this, rd, pt1, pt2, HiLoBarSegment.Box) == false)
                {
                    if (HiLoBarType == HiLoBarType.Box)
                        RenderStockBoxBackground(g, rd, r);
                    else
                        RenderStockCandleBackground(g, rd, r);

                    ChartLineVisualStyle lstyle = rd.DefaultStyle.BoxBorder;

                    if (CanUseAlternateSegmentStyle(rd) == true)
                    {
                        if (rd.IsAlternate == true && rd.AlternateStyle.BoxBorder.IsEmpty == false)
                            lstyle = rd.AlternateStyle.BoxBorder;
                    }

                    if (lstyle.LinePattern != LinePattern.None)
                    {
                        using (Pen pen = new Pen(lstyle.LineColor, Dpi.Width(lstyle.LineWidth)))
                        {
                            lineWidth = (int)pen.Width;

                            if (lstyle.LinePattern != LinePattern.NotSet)
                                pen.DashStyle = (DashStyle)lstyle.LinePattern;

                            if (pt1.X == pt2.X || pt1.Y == pt2.Y)
                            {
                                g.DrawLine(pen, pt1, pt2);
                            }
                            else
                            {
                                pen.Alignment = PenAlignment.Inset;

                                if (lstyle.LineWidth == 1)
                                {
                                    r.Width--;
                                    r.Height--;
                                }

                                if (r.Width > 0 && r.Height > 0)
                                    g.DrawRectangle(pen, r);
                            }
                        }
                    }

                    chartControl.DoPostRenderSeriesHiLoBarEvent(
                        g, chartXy, this, rd, pt1, pt2, HiLoBarSegment.Box);
                }

                if (ShowHiLoBarMedianLines == true)
                {
                    if (IsRotated == false)
                        RenderVStockBoxMedian(g, rd, r.X, r.Y, r.Bottom);
                    else
                        RenderHStockBoxMedian(g, rd, r.Y, r.X, r.Right);
                }

                g.SmoothingMode = sm;
            }

            return (lineWidth);
        }

        #region RenderStockCandleBackground

        private void RenderStockCandleBackground(
            Graphics g, HiLoRenderData rd, Rectangle r)
        {
            Background bk =
                GetBoxBackground(rd, rd.AlternateStyle.BoxBackground, rd.DefaultStyle.BoxBackground);

            if (bk.IsEmpty == false)
            {
                using (Brush br = bk.GetBrush(r))
                    g.FillRectangle(br, r);
            }
        }

        #endregion

        #region RenderStockBoxBackground

        private void RenderStockBoxBackground(
            Graphics g, HiLoRenderData rd, Rectangle r)
        {
            Background bkDef = rd.DefaultStyle.BoxBackground;
            Background bkAlt = rd.AlternateStyle.BoxBackground;

            if (bkAlt.IsEmpty == true)
                bkAlt = bkDef;

            if (rd.IsAlternate == true)
            {
                Background bkSave = bkDef;
                bkDef = bkAlt;
                bkAlt = bkSave;
            }

            if ((ShowHiLoBarMedianLines == true) && (rd.Value.Length > StockMedian))
            {
                if (bkAlt.IsEmpty == false)
                {
                    if (IsRotated == false)
                        r = RenderVBox(g, rd.Value[StockMedian], bkAlt, r);
                    else
                        r = RenderHBox(g, rd.Value[StockMedian], bkAlt, r);
                }
            }

            if (r.Width > 0 && r.Height > 0)
            {
                if (bkDef.IsEmpty == false)
                {
                    using (Brush br = bkDef.GetBrush(r))
                        g.FillRectangle(br, r);
                }
            }
        }

        #region RenderVBox

        private Rectangle RenderVBox(Graphics g, int y, Background bk, Rectangle r)
        {
            if ((y > r.Y && y < r.Bottom) && bk.IsEmpty == false)
            {
                int ry = r.Y;

                r.Height = r.Bottom - y;
                r.Y = y;

                using (Brush br = bk.GetBrush(r))
                    g.FillRectangle(br, r);

                r.Y = ry;
                r.Height = y - ry;
            }

            return (r);
        }

        #endregion

        #region RenderHBox

        private Rectangle RenderHBox(Graphics g, int x, Background bk, Rectangle r)
        {
            if (x > r.X && x < r.Right)
            {
                int rw = r.Width;

                r.Width = x - r.X;

                using (Brush br = bk.GetBrush(r))
                    g.FillRectangle(br, r);

                r.X = r.Right;
                r.Width = rw - r.Width;
            }

            return (r);
        }

        #endregion

        #endregion

        #endregion

        #region RenderHiLoWhisker

        private ChartLineVisualStyle RenderHiLoWhisker(Graphics g,
            HiLoRenderData rd, Point pt1, Point pt2, ChartLineVisualStyle style, HiLoBarSegment segment)
        {
            ChartXy chartXy = rd.ChartXy;
            ChartControl chartControl = ChartControl;

            SmoothingMode sm = g.SmoothingMode;
            g.SmoothingMode = SmoothingMode.None;

            if (chartControl.DoPreRenderSeriesHiloBarEvent(g, chartXy, this, rd, pt1, pt2, segment) == false)
            {
                if (style.LinePattern != LinePattern.None)
                {
                    using (Pen pen = new Pen(style.LineColor, Dpi.Width(style.LineWidth)))
                    {
                        if (style.LinePattern != LinePattern.NotSet)
                            pen.DashStyle = (DashStyle)style.LinePattern;

                        if (style.LineWidth == 1)
                        {
                            if (pt1.X == pt2.X)
                                pt2.Y--;
                            else
                                pt2.X--;
                        }

                        g.DrawLine(pen, pt1, pt2);
                    }
                }

                chartControl.DoPostRenderSeriesHiLoBarEvent(g, chartXy, this, rd, pt1, pt2, segment);
            }

            g.SmoothingMode = sm;

            return (style);
        }

        #endregion

        #region RenderHiLoRange

        private void RenderHiLoRange(
            Graphics g, HiLoRenderData rd, Point pt1, Point pt2, HiLoBarSegment segment)
        {
            ChartXy chartXy = rd.ChartXy;
            ChartControl chartControl = ChartControl;

            if (pt1.X == pt2.X)
            {
                if (segment == HiLoBarSegment.HighWhisker || segment == HiLoBarSegment.FullRange)
                    pt1.Y -= rd.EndDelta;

                if (segment == HiLoBarSegment.LowWhisker || segment == HiLoBarSegment.FullRange)
                    pt2.Y += rd.EndDelta;
            }
            else
            {
                if (segment == HiLoBarSegment.LowWhisker || segment == HiLoBarSegment.FullRange)
                    pt2.X -= rd.EndDelta;

                if (segment == HiLoBarSegment.HighWhisker || segment == HiLoBarSegment.FullRange)
                    pt1.X += rd.EndDelta;
            }

            SmoothingMode sm = g.SmoothingMode;
            g.SmoothingMode = SmoothingMode.None;

            if (chartControl.DoPreRenderSeriesHiloBarEvent(g, chartXy, this, rd, pt1, pt2, segment) == false)
            {
                ChartLineVisualStyle lstyle = GetSegLineStyle(rd, segment);

                if (lstyle.LinePattern != LinePattern.None)
                {
                    using (Pen pen = new Pen(lstyle.LineColor, Dpi.Width(lstyle.LineWidth)))
                    {
                        if (lstyle.LinePattern != LinePattern.NotSet)
                            pen.DashStyle = (DashStyle)lstyle.LinePattern;


                        g.DrawLine(pen, pt1, pt2);
                    }
                }
            }

            if (ShowHiLoBarMedianLines == true)
            {
                if (segment == HiLoBarSegment.CenterLine || segment == HiLoBarSegment.FullRange)
                {
                    if (IsRotated == false)
                        RenderVStockBoxMedian(g, rd, pt1.X - BarWidth / 2, pt1.Y, pt2.Y);
                    else
                        RenderHStockBoxMedian(g, rd, pt1.Y - BarWidth / 2, pt2.X, pt1.X);
                }
            }

            chartControl.DoPostRenderSeriesHiLoBarEvent(g, chartXy, this, rd, pt1, pt2, segment);

            g.SmoothingMode = sm;
        }

        #endregion

        #region GetSegLineStyle

        private ChartLineVisualStyle GetSegLineStyle(HiLoRenderData rd, HiLoBarSegment segment)
        {
            ChartLineVisualStyle style = rd.DefaultStyle.Default;

            if (CanUseAlternateSegmentStyle(rd) == true)
            {
                if (rd.IsAlternate == true && rd.AlternateStyle.Default.IsEmpty == false)
                    style = rd.AlternateStyle.Default;
            }

            switch (segment)
            {
                case HiLoBarSegment.FullRange:
                    break;

                case HiLoBarSegment.Box:
                    if (rd.IsAlternate == true && rd.AlternateStyle.BoxBorder.IsEmpty == false)
                    {
                        style = rd.AlternateStyle.BoxBorder;
                    }
                    else
                    {
                        if (rd.DefaultStyle.BoxBorder.IsEmpty == false)
                            style = rd.DefaultStyle.BoxBorder;
                    }
                    break;

                case HiLoBarSegment.MedianLine:
                    if (rd.IsAlternate == true && rd.AlternateStyle.MedianLine.IsEmpty == false)
                    {
                        style = rd.AlternateStyle.MedianLine;
                    }
                    else
                    {
                        if (rd.DefaultStyle.MedianLine.IsEmpty == false)
                            style = rd.DefaultStyle.MedianLine;
                    }
                    break;

                case HiLoBarSegment.HighWhiskerCap:
                    if (rd.IsAlternate == true && rd.AlternateStyle.HighWhiskerCap.IsEmpty == false)
                    {
                        style = rd.AlternateStyle.HighWhiskerCap;
                    }
                    else
                    {
                        if (rd.DefaultStyle.HighWhiskerCap.IsEmpty == false)
                            style = rd.DefaultStyle.HighWhiskerCap;
                    }
                    break;

                case HiLoBarSegment.LowWhiskerCap:
                    if (rd.IsAlternate == true && rd.AlternateStyle.LowWhiskerCap.IsEmpty == false)
                    {
                        style = rd.AlternateStyle.LowWhiskerCap;
                    }
                    else
                    {
                        if (rd.DefaultStyle.LowWhiskerCap.IsEmpty == false)
                            style = rd.DefaultStyle.LowWhiskerCap;
                    }
                    break;

                case HiLoBarSegment.HighWhisker:
                    if (rd.IsAlternate == true && rd.AlternateStyle.HighWhisker.IsEmpty == false)
                    {
                        style = rd.AlternateStyle.HighWhisker;
                    }
                    else
                    {
                        if (rd.DefaultStyle.HighWhisker.IsEmpty == false)
                            style = rd.DefaultStyle.HighWhisker;
                    }
                    break;

                case HiLoBarSegment.LowWhisker:
                    if (rd.IsAlternate == true && rd.AlternateStyle.LowWhisker.IsEmpty == false)
                    {
                        style = rd.AlternateStyle.LowWhisker;
                    }
                    else
                    {
                        if (rd.DefaultStyle.LowWhisker.IsEmpty == false)
                            style = rd.DefaultStyle.LowWhisker;
                    }
                    break;

                case HiLoBarSegment.OpenWhisker:
                    if (rd.IsAlternate == true && rd.AlternateStyle.OpenWhisker.IsEmpty == false)
                    {
                        style = rd.AlternateStyle.OpenWhisker;
                    }
                    else
                    {
                        if (rd.DefaultStyle.OpenWhisker.IsEmpty == false)
                            style = rd.DefaultStyle.OpenWhisker;
                    }
                    break;

                case HiLoBarSegment.CloseWhisker:
                    if (rd.IsAlternate == true && rd.AlternateStyle.CloseWhisker.IsEmpty == false)
                    {
                        style = rd.AlternateStyle.CloseWhisker;
                    }
                    else
                    {
                        if (rd.DefaultStyle.CloseWhisker.IsEmpty == false)
                            style = rd.DefaultStyle.CloseWhisker;
                    }
                    break;

                case HiLoBarSegment.CenterLine:
                    if (rd.IsAlternate == true && rd.AlternateStyle.CenterLine.IsEmpty == false)
                    {
                        style = rd.AlternateStyle.CenterLine;
                    }
                    else
                    {
                        if (rd.DefaultStyle.CenterLine.IsEmpty == false)
                            style = rd.DefaultStyle.CenterLine;
                    }
                    break;
            }

            return (style);
        }

        #region CanUseAlternateSegmentStyle

        private bool CanUseAlternateSegmentStyle(HiLoRenderData rd)
        {
            Tbool uas = rd.SeriesStyle.HiLoBarVisualStyle.UseAlternateSegmentStyle;

            if (uas == Tbool.NotSet)
                return (HiLoBarType == HiLoBarType.Candle);

            return (uas == Tbool.True);
        }

        #endregion

        #endregion

        #region GetBoxBackground

        private Background GetBoxBackground(HiLoRenderData rd, Background abk, Background sbk)
        {
            if (rd.IsAlternate == true && abk.IsEmpty == false)
                return (abk);

            return (sbk);
        }

        #endregion

        #endregion

        #region HighLightPoints

        private bool HighLightPoints(ChartXy chartXy)
        {
            if (chartXy.ChartCrosshair.Visible == false)
                return (false);

            if (CrosshairHighlightPoints != Tbool.NotSet)
                return (CrosshairHighlightPoints == Tbool.True);

            return (chartXy.ChartCrosshair.HighlightPoints);
        }

        #endregion

        #region HighLightSinglePoint

        private bool HighLightSinglePoint(ChartXy chartXy)
        {
            if (chartXy.ChartCrosshair.Visible == false)
                return (false);

            if (CrosshairHighlightSinglePoint != Tbool.NotSet)
                return (CrosshairHighlightSinglePoint == Tbool.True);

            return (chartXy.ChartCrosshair.HighlightSinglePoint);
        }

        #endregion

        #region GetHighlightStyle

        private PointMarkerVisualStyle GetHighlightStyle(
            ChartXy chartXy, ChartSeriesVisualStyle sstyle)
        {
            if (HighLightPoints(chartXy) == true)
            {
                PointMarkerVisualStyle pstyle = sstyle.MarkerVisualStyle;
                PointMarkerVisualStyle hstyle = pstyle.Copy();

                if (sstyle.MarkerHighlightVisualStyle.IsEmpty == false)
                {
                    hstyle.ApplyStyle(sstyle.MarkerHighlightVisualStyle);
                }
                else
                {
                    Size size = hstyle.Size;

                    size.Width += 4;
                    size.Height += 4;

                    hstyle.Size = size;
                }

                return (hstyle);
            }

            return (null);
        }

        #endregion

        #region GetPointMarkerImage

        private Image GetPointMarkerImage(
            Graphics g, ChartXy chartXy, PointMarkerVisualStyle style)
        {
            Image image = PointMarkerImage;

            if (image == null)
            {
                image = chartXy.GetPointMarker(g, style);

                PointMarkerImage = image;
            }

            return (image);
        }

        #endregion

        #region GetHighlightImage

        private Image GetHighlightImage(
            Graphics g, ChartXy chartXy, PointMarkerVisualStyle style)
        {
            Image image = PointMarkerHighlightImage;

            if (image == null)
            {
                image = chartXy.GetPointMarker(g, style);

                PointMarkerHighlightImage = image;
            }

            return (image);
        }

        #endregion

        #region GetEmptyMarkerImage

        private Image GetEmptyMarkerImage(
            Graphics g, ChartXy chartXy, PointMarkerVisualStyle style)
        {
            Image image = PointMarkerEmptyImage;

            if (image == null)
            {
                image = chartXy.GetPointMarker(g, style);

                PointMarkerEmptyImage = image;
            }

            return (image);
        }

        #endregion

        #region GatherSeriesPoints

        private PointData GatherSeriesPoints(
            ChartXy chartXy, SortedSeriesPoints ssp, int index, int count, bool allArgs)
        {
            if (_PointData == null)
                _PointData = GatherSeriesPointsEx(chartXy, ssp, index, count, allArgs);

            return (_PointData);
        }

        private PointData GatherSeriesPointsEx(
            ChartXy chartXy, SortedSeriesPoints ssp, int index, int count, bool allArgs)
        {
            PointData pd = new PointData();

            pd.Points = new List<Point[]>();
            pd.SeriesPoints = new List<SeriesPoint[]>();

            if (EnableEmptyValues == true)
            {
                PointData epd = new PointData();

                epd.Points = new List<Point[]>();
                epd.SeriesPoints = new List<SeriesPoint[]>();

                int n = 0;
                bool empty = false;

                for (int i = 0; i < count; i++)
                {
                    if (ssp[index + i].IsEmpty != empty)
                    {
                        int cnt = i - n;

                        if (cnt > 0)
                            GetPointList(chartXy, ssp, index + n, cnt, allArgs, empty ? epd : pd);

                        empty = !empty;

                        n = i;
                    }
                }

                if (n < count)
                    GetPointList(chartXy, ssp, index + n, count - n, allArgs, empty ? epd : pd);

                _EmptyPointData = epd;
            }
            else
            {
                GetPointList(chartXy, ssp, index, count, allArgs, pd);
            }

            return (pd);
        }

        #endregion

        #region GetPointList

        private void GetPointList(ChartXy chartXy,
            SortedSeriesPoints ssp, int index, int cnt, bool allArgs, PointData pd)
        {
            GetPointList(chartXy, ssp, index, cnt, 0, 0, allArgs, pd);
        }

        private void GetPointList(ChartXy chartXy, SortedSeriesPoints ssp,
            int index, int cnt, int skip, int minDistance, bool allArgs, PointData pd)
        {
            if (cnt > 0)
            {
                Stack<object> stack = new Stack<object>();

                skip++;

                Point lpt = new Point(-5000, -5000);

                if (allArgs == false)
                {
                    if (cnt > skip && skip > 1)
                        cnt = (cnt + skip - 1) / skip;

                    for (int i = 0; i < cnt; i++)
                    {
                        int n = index + (i * skip);

                        if (n >= ssp.Count)
                            break;

                        SeriesPoint sp = ssp[n];

                        if (sp.Visible == true)
                        {
                            Point pt = chartXy.GetDataPointEx(this, sp, 0);

                            if (minDistance <= 0 || DataPointDistanceOk(lpt, pt, minDistance) == true)
                            {
                                stack.Push(sp);
                                stack.Push(pt);

                                lpt = pt;
                            }
                        }
                    }
                }
                else
                {
                    int n = 0;

                    for (int i = 0; i < cnt; i++)
                        n += ssp[index + i].ValueY.Length;

                    n /= (n + skip - 1) / skip;

                    int m = 0;

                    for (int i = 0; i < cnt; i++)
                    {
                        SeriesPoint sp = ssp[index + i];

                        for (int j = 0; j < sp.ValueY.Length; j++)
                        {
                            if (m % skip == 0)
                            {
                                int w = m / skip;

                                Point pt = chartXy.GetDataPointNa(this, sp, j);

                                if (minDistance <= 0 || DataPointDistanceOk(lpt, pt, minDistance) == true)
                                {
                                    stack.Push(sp);
                                    stack.Push(pt);

                                    lpt = pt;
                                }
                            }

                            m++;
                        }
                    }
                }

                if (stack.Count > 0)
                {
                    int n = stack.Count / 2;

                    Point[] points = new Point[n];
                    SeriesPoint[] seriesPoints = new SeriesPoint[n];

                    for (int i = n - 1; i >= 0; i--)
                    {
                        points[i] = (Point)stack.Pop();
                        seriesPoints[i] = (SeriesPoint)stack.Pop();
                    }

                    pd.Points.Add(points);
                    pd.SeriesPoints.Add(seriesPoints);
                }
            }
        }

        #region DataPointDistanceOk

        private bool DataPointDistanceOk(Point lpt, Point pt, int minDistance)
        {
            int dx = (lpt.X - pt.X);
            int dy = (lpt.Y - pt.Y);

            int h = (int)MathHelper.Sqrt(dx * dx + dy * dy);

            return (h >= minDistance);
        }

        #endregion

        #endregion

        #endregion

        #region Render

        internal override void Render(ChartRenderInfo renderInfo)
        {
            if (Displayed == true)
            {
                Rectangle bounds = BoundsRelative;

                if (renderInfo.ClipRectangle.IntersectsWith(bounds))
                    RenderOverride(renderInfo);
            }
        }

        #endregion

        #region RenderIndicators

        internal void RenderIndicators(ChartRenderInfo renderInfo, bool onTop)
        {
            if (SeriesType != SeriesType.HorizontalDot || SeriesType != SeriesType.VerticalDot)
            {
                if (SeriesPoints.Count > 0)
                {
                    Graphics g = renderInfo.Graphics;

                    ChartXy chartXy = Parent as ChartXy;
                    ChartSeriesVisualStyle sstyle = EffectiveChartSeriesStyle;

                    SortedSeriesPoints ssp = GetSortedSeriesPoints(chartXy);

                    foreach (ChartIndicator indicator in ChartIndicators)
                    {
                        if (indicator.DisplayOnTop == onTop)
                        {
                            if (indicator.IsDisplayed == true)
                            {
                                ssp.SlopeIndex = indicator.ValueYIndex;

                                switch (indicator.IndicatorType)
                                {
                                    case ChartIndicatorType.RegressionLine:
                                        RenderRegressionLine(g, chartXy, ssp, (RegressionLine)indicator);
                                        break;

                                    case ChartIndicatorType.TrendLine:
                                        RenderTrendLine(g, chartXy, ssp, (TrendLine)indicator);
                                        break;
                                }
                            }
                        }
                    }
                }
            }
        }

        #region RenderRegressionLine

        private void RenderRegressionLine(Graphics g,
            ChartXy chartXy, SortedSeriesPoints ssp, RegressionLine regline)
        {
            double m = regline.Slope;
            double b = regline.Intercept;

            if (m.Equals(double.NaN) == false && b.Equals(double.NaN) == false)
            {
                ChartAxis axis = AxisX ?? chartXy.AxisX;

                double x1, x2;

                switch (ActualScaleTypeX)
                {
                    case ScaleType.DateTime:
                        x1 = chartXy.GetDateTimePointValue(axis, axis.TickmarkLayout, (DateTime)MinValueX);
                        x2 = chartXy.GetDateTimePointValue(axis, axis.TickmarkLayout, (DateTime)MaxValueX);
                        break;

                    default:
                        x1 = Convert.ToDouble(MinValueX);
                        x2 = Convert.ToDouble(MaxValueX);
                        break;
                }

                Point pt1 = chartXy.GetPointFromValue(this, MinValueX, m * x1 + b);
                Point pt2 = chartXy.GetPointFromValue(this, MaxValueX, m * x2 + b);

                if (SeriesType == SeriesType.VerticalBar ||
                    SeriesType == SeriesType.VerticalHiLoBar)
                {
                    pt1.X += BarOffset;
                    pt2.X += BarOffset;
                }
                else if (SeriesType == SeriesType.HorizontalBar ||
                         SeriesType == SeriesType.HorizontalHiLoBar)
                {
                    pt1.Y += BarOffset;
                    pt2.Y += BarOffset;
                }

                RegressionLineVisualStyle rstyle = regline.RegressionLineVisualStyle;

                Color color = rstyle.LineColor;

                if (color.IsEmpty)
                    color = DefaultPaletteColor;

                using (Pen pen = new Pen(color, Dpi.Width(rstyle.LineWidth)))
                {
                    if (rstyle.LinePattern != LinePattern.NotSet)
                        pen.DashStyle = (DashStyle)rstyle.LinePattern;

                    if (rstyle.StartCap != ChartLineCap.NotSet)
                        pen.StartCap = (LineCap)rstyle.StartCap;

                    if (rstyle.EndCap != ChartLineCap.NotSet)
                        pen.EndCap = (LineCap)rstyle.EndCap;

                    g.DrawLine(pen, pt1, pt2);
                }
            }
        }

        #endregion

        #region RenderTrendLine

        private void RenderTrendLine(Graphics g,
            ChartXy chartXy, SortedSeriesPoints ssp, TrendLine trendLine)
        {
            SeriesPoint sp1 = ssp.GetSeriesPoint(trendLine.ValueX1);
            SeriesPoint sp2 = ssp.GetSeriesPoint(trendLine.ValueX2);

            if (sp1 != null && sp2 != null)
            {
                Point pt1 = chartXy.GetDataPointEx(this, sp1, trendLine.ValueYIndex);
                Point pt2 = chartXy.GetDataPointEx(this, sp2, trendLine.ValueYIndex);

                if (SeriesType == SeriesType.VerticalBar ||
                    SeriesType == SeriesType.VerticalHiLoBar)
                {
                    pt1.X += BarOffset;
                    pt2.X += BarOffset;
                }
                else if (SeriesType == SeriesType.HorizontalBar ||
                         SeriesType == SeriesType.HorizontalHiLoBar)
                {
                    pt1.Y += BarOffset;
                    pt2.Y += BarOffset;
                }

                if (pt1.X >= chartXy.ContentBounds.X && pt2.X < chartXy.ContentBounds.Right)
                {
                    TrendLineVisualStyle tstyle = trendLine.TrendLineVisualStyle;

                    Color color = tstyle.LineColor;

                    if (color.IsEmpty)
                        color = DefaultPaletteColor;

                    using (Pen pen = new Pen(color, Dpi.Width(tstyle.LineWidth)))
                    {
                        if (tstyle.LinePattern != LinePattern.NotSet)
                            pen.DashStyle = (DashStyle)tstyle.LinePattern;

                        if (tstyle.StartCap != ChartLineCap.NotSet)
                            pen.StartCap = (LineCap)tstyle.StartCap;

                        if (tstyle.EndCap != ChartLineCap.NotSet)
                            pen.EndCap = (LineCap)tstyle.EndCap;

                        g.DrawLine(pen, pt1, pt2);
                    }
                }
            }
        }

        #endregion

        #endregion

        #region InvalidatePoints

        internal void InvalidatePoints()
        {
            _PointData = null;
            _EmptyPointData = null;
            _ConvexHullPoints = null;
            _StepPointData = null;
        }

        #endregion

        #region InvalidatePointLabels

        internal void InvalidatePointLabels()
        {
            ChartXy chartXy = Parent as ChartXy;

            if (chartXy != null)
                chartXy.InvalidatePointLabelsEx();
        }

        #endregion

        #region UpdateSeriesRange

        internal void UpdateSeriesRange()
        {
            if (SeriesRangeChanged == true)
            {
                if (Parent == null)
                    return;

                SeriesRangeChanged = false;

                IsSorted = true;

                QualitativeXValues.Clear();
                QualitativeYValues.Clear();

                _MinValueX = null;
                _MinValueY = null;
                _MaxValueX = null;
                _MaxValueY = null;

                if (SeriesPoints.Count > 0)
                {
                    BaseChart chart = Parent as BaseChart;

                    Type dataTypeX = null;
                    Type dataTypeY = null;

                    if (ChartControl != null && ChartControl.DesignerHosted == true)
                    {
                        dataTypeX = GetDataTypeX(SeriesPoints);
                        dataTypeY = GetDataTypeY(SeriesPoints);

                        ActualScaleTypeX = GetActualScaleType(dataTypeX, ScaleTypeX);
                        ActualScaleTypeY = GetActualScaleType(dataTypeY, ScaleTypeY);

                        _PlotData = null;
                    }

                    for (int i = 0; i < SeriesPoints.Count; i++)
                    {
                        SeriesPoint sp = SeriesPoints[i];

                        if (sp.Visible == true)
                        {
                            UpdateXValueRange(chart, sp, ref dataTypeX);

                            switch (SeriesType)
                            {
                                case SeriesType.VerticalDot:
                                case SeriesType.HorizontalDot:
                                    ActualScaleTypeY = ScaleType.Quantitative;
                                    break;

                                case SeriesType.Bubble:
                                    UpdateYBubbleRange(chart, sp, ref dataTypeY);
                                    break;

                                default:
                                    UpdateYValueRange(chart, sp, ref dataTypeY);
                                    break;
                            }
                        }
                    }

                    if (SeriesType == SeriesType.VerticalDot ||
                        SeriesType == SeriesType.HorizontalDot)
                    {
                        UpdateStackedYValueRange();
                    }
                    else
                    {
                        if (QualitativeXValues.Count > 0)
                        {
                            _MinValueX = 0;
                            _MaxValueX = QualitativeXValues.Count - 1;
                        }

                        if (QualitativeYValues.Count > 0)
                        {
                            _MinValueY = 0;
                            _MaxValueY = QualitativeYValues.Count - 1;
                        }
                    }
                }
            }
        }

        #region GetDataTypeX

        private Type GetDataTypeX(SeriesPointCollection spc)
        {
            Type dataType = null;

            for (int i = 0; i < spc.Count; i++)
            {
                SeriesPoint sp = spc[i];

                if (sp.Visible == true)
                {
                    if (sp.ValueX != null)
                    {
                        dataType = sp.ValueX.GetType();

                        if (dataType != typeof(int))
                            break;
                    }
                }
            }

            return (dataType);
        }

        #endregion

        #region GetDataTypeY

        private Type GetDataTypeY(SeriesPointCollection spc)
        {
            Type dataType = null;

            for (int i = 0; i < spc.Count; i++)
            {
                SeriesPoint sp = spc[i];

                if (sp.Visible == true)
                {
                    if (sp.ValueY != null && sp.ValueY.Length > 0)
                    {
                        for (int j = 0; j < sp.ValueY.Length; j++)
                        {
                            object valueY = sp.ValueY[j];

                            if (valueY != null)
                            {
                                dataType = valueY.GetType();

                                if (dataType != typeof(int))
                                    return (dataType);
                            }
                        }
                    }
                }
            }

            return (dataType);
        }

        #endregion

        #region UpdateXValueRange

        private int _CmpLast;

        private void UpdateXValueRange(BaseChart chart, SeriesPoint sp, ref Type dataType)
        {
            object value = sp.ValueX;

            if (value != null)
            {
                if (dataType == null)
                {
                    dataType = value.GetType();

                    ActualScaleTypeX = GetActualScaleType(dataType, ScaleTypeX);
                }
                else
                {
                    if (value.GetType() != dataType)
                    {
                        if (ChartControl.DesignerHosted == true)
                        {
                            try
                            {
                                sp.ValueX = Convert.ChangeType(value, dataType);
                            }
                            catch
                            {
                                sp.ValueX = null;
                            }

                            value = sp.ValueX;
                        }
                        else
                        {
                            throw new Exception("Cannot mix ValueX data types (" +
                                dataType + "," + value.GetType() + ").");
                        }
                    }
                }

                switch (_ActualScaleTypeX)
                {
                    case ScaleType.Qualitative:
                        if (QualitativeXValues.Contains(value) == false)
                            QualitativeXValues.Add(value);
                        break;

                    default:
                        if (_MinValueX == null)
                        {
                            _MinValueX = value;
                            _MaxValueX = value;

                            _CmpLast = 0;
                        }
                        else
                        {
                            if (chart.DataCompare(value, _MaxValueX) >= 0)
                            {
                                _MaxValueX = value;

                                if (_CmpLast == 0)
                                    _CmpLast = 1;

                                else if (_CmpLast < 0)
                                    IsSorted = false;
                            }
                            else
                            {
                                if (chart.DataCompare(value, _MinValueX) <= 0)
                                    _MinValueX = value;

                                if (_CmpLast == 0)
                                    _CmpLast = -1;

                                else if (_CmpLast > 0)
                                    IsSorted = false;
                            }
                        }
                        break;
                }
            }
        }

        #endregion

        #region UpdateYBubbleRange

        private void UpdateYBubbleRange(BaseChart chart, SeriesPoint sp, ref Type dataType)
        {
            if (sp.ValueY == null || sp.ValueY.Length < 1)
                throw new Exception("Invalid Bubble Chart 'Y' arguments.");

            if (_PlotData == null)
                _PlotData = new BubblePlotData();

            BubblePlotData bdata = (BubblePlotData)_PlotData;

            object value = sp.ValueY[0];

            sp.IsEmptyValue = IsEmptyValue(value);

            if (sp.IsEmpty == false)
            {
                if (dataType == null)
                {
                    bdata.Clear();

                    dataType = value.GetType();

                    ActualScaleTypeY = GetActualScaleType(dataType, ScaleTypeY);
                }
                else
                {
                    if (value.GetType() != dataType)
                    {
                        if (ChartControl.DesignerHosted == true)
                        {
                            sp.ValueY[0] = Convert.ChangeType(value, dataType);

                            value = sp.ValueY[0];
                        }
                        else
                        {
                            throw new Exception("Cannot mix ValueY data types (" +
                                dataType + "," + value.GetType() + ").");
                        }
                    }
                }

                ProcessYValueRange(chart, value);

                if (sp.ValueY.Length > 1)
                {
                    double bvalue = GetDoubleValue(sp.ValueY[1]);

                    bvalue = Math.Abs(bvalue);

                    if (bvalue < bdata.MinSize)
                        bdata.MinSize = bvalue;

                    if (bvalue > bdata.MaxSize)
                        bdata.MaxSize = bvalue;

                    bdata.TotalSize += bvalue;

                    if (sp.ValueY.Length > 2)
                    {
                        double ivalue = GetDoubleValue(sp.ValueY[2]);

                        if (ivalue < bdata.MinIntensity)
                            bdata.MinIntensity = ivalue;

                        if (ivalue > bdata.MaxIntensity)
                            bdata.MaxIntensity = ivalue;
                    }
                }
            }
        }

        #endregion

        #region UpdateYValueRange

        private void UpdateYValueRange(BaseChart chart, SeriesPoint sp, ref Type dataType)
        {
            if (sp.ValueY != null)
            {
                for (int j = 0; j < sp.ValueY.Length; j++)
                {
                    object value = sp.ValueY[j];

                    sp.IsEmptyValue = IsEmptyValue(value);

                    if (sp.IsEmpty == false)
                    {
                        if (dataType == null)
                        {
                            dataType = value.GetType();

                            ActualScaleTypeY = GetActualScaleType(dataType, ScaleTypeY);
                        }
                        else
                        {
                            if (value.GetType() != dataType)
                            {
                                if (ChartControl.DesignerHosted == true)
                                {
                                    try
                                    {
                                        sp.ValueY[j] = Convert.ChangeType(value, dataType);
                                    }
                                    catch
                                    {
                                        sp.ValueY[j] = null;
                                    }

                                    value = sp.ValueY[j];
                                }
                                else
                                {
                                    throw new Exception("Cannot mix ValueY data types (" +
                                        dataType + "," + value.GetType() + ").");
                                }
                            }
                        }

                        ProcessYValueRange(chart, value);
                    }
                }
            }
            else
            {
                sp.IsEmptyValue = true;
            }
        }

        #region IsEmptyValue

        private bool IsEmptyValue(object value)
        {
            if (value == null)
                return (true);

            if (EmptyValues != null)
            {
                Type dataType = value.GetType();

                for (int i = 0; i < EmptyValues.Length; i++)
                {
                    if (EmptyValues[i] != null)
                    {
                        if (dataType == EmptyValues[i].GetType())
                        {
                            if (value.Equals(EmptyValues[i]) == true)
                                return (true);
                        }
                    }
                }
            }

            return (false);
        }

        #endregion

        #endregion

        #region UpdateStackedYValueRange

        private void UpdateStackedYValueRange()
        {
            if (QualitativeXValues.Count > 0 || QualitativeYValues.Count > 0)
                throw new Exception("Dot plots can not contain Qualitative values.");

            Dictionary<object, double> pd = new Dictionary<object, double>();

            for (int i = 0; i < SeriesPoints.Count; i++)
            {
                SeriesPoint sp = SeriesPoints[i];

                if (sp.Visible == true)
                {
                    object ox = sp.ValueX;

                    double count = 0;

                    if (sp.ValueY != null && sp.ValueY.Length > 0)
                    {
                        foreach (object oy in sp.ValueY)
                        {
                            sp.IsEmptyValue = IsEmptyValue(oy);

                            if (sp.IsEmpty == false)
                                count += GetDoubleValue(oy);
                        }
                    }
                    else
                    {
                        if (sp.IsEmpty == false)
                            count++;
                    }

                    if (sp.IsEmpty == false)
                    {
                        if (pd.ContainsKey(ox) == true)
                            pd[ox] += count;
                        else
                            pd.Add(ox, count);
                    }
                }
            }

            double maxValue = 0;

            foreach (KeyValuePair<object, double> kvp in pd)
            {
                if (kvp.Value > maxValue)
                    maxValue = kvp.Value;
            }

            _MinValueY = 0.0;
            _MaxValueY = maxValue;
        }

        #endregion

        #region ProcessYValueRange

        private void ProcessYValueRange(BaseChart chart, object value)
        {
            switch (_ActualScaleTypeY)
            {
                case ScaleType.Qualitative:
                    if (QualitativeYValues.Contains(value) == false)
                        QualitativeYValues.Add(value);
                    break;

                default:
                    if (_MinValueY == null)
                    {
                        _MinValueY = value;
                        _MaxValueY = value;
                    }
                    else
                    {
                        int cmpMax = chart.DataCompare(value, _MaxValueY);

                        if (cmpMax >= 0)
                        {
                            _MaxValueY = value;
                        }
                        else
                        {
                            int cmpMin = chart.DataCompare(value, _MinValueY);

                            if (cmpMin <= 0)
                                _MinValueY = value;
                        }
                    }
                    break;
            }
        }

        #endregion

        #region GetActualScaleType

        private ScaleType GetActualScaleType(Type dataType, ScaleType scaleType)
        {
            ScaleType autoType = SeriesPoint.GetScaleType(dataType);

            if (scaleType == ScaleType.NotSet || scaleType == ScaleType.Auto)
                return (autoType);

            if (scaleType == autoType)
                return (scaleType);

            if (scaleType == ScaleType.Qualitative)
                return (scaleType);

            throw new Exception("Set ScaleType is incompatible with series data.");
        }

        #endregion

        #endregion

        #region ResetSortedPoints

        internal void ResetSortedPoints()
        {
            if (IsSorted == false)
                _SortedSeriesPoints = null;
        }

        #endregion

        #region GetValueX

        internal object GetValueX(SeriesPoint sp)
        {
            if (IsRotated == false)
                return (sp.ValueX);

            if (sp.ValueY != null && sp.ValueY.Length > 0)
                return (sp.ValueY[0]);

            return (null);
        }

        #endregion

        #region GetValueY

        internal object GetValueY(SeriesPoint sp, int index)
        {
            if (IsRotated == true)
                return (sp.ValueX);

            if (sp.ValueY != null && sp.ValueY.Length > index)
                return (sp.ValueY[index]);

            return (null);
        }

        #endregion

        #region GetQualitativeValueX

        internal object GetQualitativeValueX(int index)
        {
            if (IsRotated == false)
            {
                if (QualitativeXValues != null && QualitativeXValues.Count > index)
                    return (QualitativeXValues[index]);
            }
            else
            {
                if (QualitativeYValues != null && QualitativeYValues.Count > index)
                    return (QualitativeYValues[index]);
            }

            return (null);
        }

        #endregion

        #region GetQualitativeValueY

        internal object GetQualitativeValueY(int index)
        {
            if (IsRotated == true)
            {
                if (QualitativeXValues != null && QualitativeXValues.Count > index)
                    return (QualitativeXValues[index]);
            }
            else
            {
                if (QualitativeYValues != null && QualitativeYValues.Count > index)
                    return (QualitativeYValues[index]);
            }

            return (null);
        }

        #endregion

        #region GetDoubleValue

        private double GetDoubleValue(object value)
        {
            if (value is double)
                return (double)value;

            return (Convert.ToDouble(value));
        }

        #endregion

        #region AddSeriesPoint

        internal override void AddSeriesPoint(object valueX, object[] valuesY, object dataItem)
        {
            SeriesPoint sp = new SeriesPoint(valueX, valuesY);

            sp.DataItem = dataItem;

            SeriesPoints.Add(sp);
        }

        #endregion

        #region ClearSeriesPoints

        internal override void ClearSeriesPoints()
        {
            SeriesPoints.Clear();
        }

        #endregion

        #region GetBarWidthRatio

        internal double GetBarWidthRatio(ChartXy chartXy)
        {
            return (_BarWidthRatio > 0 ? _BarWidthRatio :
                (chartXy.BarWidthRatio > 0 ? chartXy.BarWidthRatio : 1));
        }

        #endregion

        #region GetPointLabels

        internal List<PointLabel> GetPointLabels(Graphics g)
        {
            ChartXy chartXy = Parent as ChartXy;

            PointLabelDisplayMode plmode = GetPointLabelDisplayType(chartXy);

            if (plmode != PointLabelDisplayMode.None)
            {
                ChartSeriesVisualStyle sstyle = EffectiveChartSeriesStyle;

                SortedSeriesPoints ssp = GetSortedSeriesPoints(chartXy);
                ssp.SeriesLayoutCount = chartXy.SeriesLayoutCount;

                ChartAxis axisX = (IsRotated == true) ? AxisY ?? chartXy.AxisY : AxisX ?? chartXy.AxisX;
                ChartAxis axisY = (IsRotated == true) ? AxisX ?? chartXy.AxisX : AxisY ?? chartXy.AxisY;

                if (ssp.Count > 0)
                {
                    DataLabelVisualStyle dstyle = EffectiveDataLabelStyle;

                    PointData pd = GetLabelPoints(chartXy, ssp, 0, ssp.Count, plmode);

                    List<PointLabel> plabels = new List<PointLabel>();

                    if (pd.Points.Count > 0)
                    {
                        for (int i = 0; i < pd.Points.Count; i++)
                        {
                            Point[] pts = pd.Points[i];
                            SeriesPoint[] spts = pd.SeriesPoints[i];

                            for (int j = 0; j < pts.Length; j++)
                            {
                                SeriesPoint sp = spts[j];
                                Point pt = pts[j];

                                if (IsBarSeries == true && ShowOriginValueLabels == false)
                                {
                                    if (IsBarOrigin(chartXy, sp) == true)
                                        continue;
                                }

                                string text = GetPointLabelText(sp, axisX, axisY, dstyle);

                                PointLabel pl = new PointLabel(sp, pt, text);

                                pl.LabelSize = MeasurePointLabel(g, pl);

                                plabels.Add(pl);
                            }
                        }
                    }

                    if ((plmode & PointLabelDisplayMode.DataLabels) == PointLabelDisplayMode.DataLabels)
                        GetDataLabels(g, plabels, chartXy, axisX, axisY, dstyle);

                    return (plabels);
                }
            }

            return (null);
        }

        #region GetPointLabelDisplayType

        private PointLabelDisplayMode GetPointLabelDisplayType(ChartXy chartXy)
        {
            PointLabelDisplayMode ptype = PointLabelDisplayMode;

            if (ptype != PointLabelDisplayMode.NotSet)
                return (ptype);

            ptype = chartXy.PointLabelDisplayMode;

            return (ptype != PointLabelDisplayMode.NotSet ? ptype : PointLabelDisplayMode.None);
        }

        #endregion

        #region GetLabelPoints

        /// <summary>
        /// Gets the collection of series PointData for the given PointLabelDisplayType.
        /// </summary>
        /// <param name="plmode"></param>
        /// <returns></returns>
        public PointData GetLabelPoints(PointLabelDisplayMode displayType)
        {
            ChartXy chartXy = Parent as ChartXy;

            if (chartXy != null)
            {
                SortedSeriesPoints ssp = GetSortedSeriesPoints(chartXy);

                return (GetLabelPoints(chartXy, ssp, 0, ssp.Count, displayType));
            }

            return (null);
        }

        private PointData GetLabelPoints(ChartXy chartXy,
            SortedSeriesPoints ssp, int index, int count, PointLabelDisplayMode displayType)
        {
            PointData pd = new PointData();

            pd.Points = new List<Point[]>();
            pd.SeriesPoints = new List<SeriesPoint[]>();

            if ((displayType & PointLabelDisplayMode.AllSeriesPoints) == PointLabelDisplayMode.AllSeriesPoints)
                GetPointList(chartXy, ssp, index, count, _PointLabelSkip, _PointLabelMinDistance, false, pd);

            else if ((displayType & ~PointLabelDisplayMode.AllSeriesPoints) != 0)
            {
                List<SeriesPoint> lmmsp = new List<SeriesPoint>();

                if ((displayType & PointLabelDisplayMode.MinValueX) == PointLabelDisplayMode.MinValueX)
                {
                    int n;

                    if (IsRotated == true)
                    {
                        if (QualitativeYValues.Count > 0)
                            n = (int)MinValueX;
                        else
                            n = ssp.SearchY(MinValueX);
                    }
                    else
                    {
                        if (QualitativeXValues.Count > 0)
                            n = (int)MinValueX;
                        else
                            n = (ssp.IsSorted == true) ? 0 : ssp.SearchX(MinValueX);
                    }

                    if (n >= 0)
                        lmmsp.Add(ssp[n]);
                }

                if ((displayType & PointLabelDisplayMode.MaxValueX) == PointLabelDisplayMode.MaxValueX)
                {
                    int n;

                    if (IsRotated == true)
                    {
                        if (QualitativeYValues.Count > 0)
                            n = (int)MaxValueX;
                        else
                            n = ssp.SearchY(MaxValueX);
                    }
                    else
                    {
                        if (QualitativeXValues.Count > 0)
                            n = (int)MaxValueX;
                        else
                            n = (ssp.IsSorted == true) ? ssp.Count - 1 : ssp.SearchX(MaxValueX);
                    }

                    if (n >= 0 && lmmsp.Contains(ssp[n]) == false)
                        lmmsp.Add(ssp[n]);
                }

                if ((displayType & PointLabelDisplayMode.MinValueY) == PointLabelDisplayMode.MinValueY)
                {
                    int n;

                    if (IsRotated == true)
                    {
                        if (QualitativeXValues.Count > 0)
                            n = (int)MinValueY;
                        else
                            n = (ssp.IsSorted == true) ? 0 : ssp.SearchX(MinValueY);
                    }
                    else
                    {
                        if (QualitativeYValues.Count > 0)
                            n = (int)MinValueY;
                        else
                            n = ssp.SearchY(MinValueY);
                    }

                    if (n >= 0 && lmmsp.Contains(ssp[n]) == false)
                        lmmsp.Add(ssp[n]);
                }

                if ((displayType & PointLabelDisplayMode.MaxValueY) == PointLabelDisplayMode.MaxValueY)
                {
                    int n;

                    if (IsRotated == true)
                    {
                        if (QualitativeXValues.Count > 0)
                            n = (int)MaxValueY;
                        else
                            n = ssp.SearchX(MaxValueY);
                    }
                    else
                    {
                        if (QualitativeYValues.Count > 0)
                            n = (int)MaxValueY;
                        else
                            n = ssp.SearchY(MaxValueY);
                    }

                    if (n >= 0 && lmmsp.Contains(ssp[n]) == false)
                        lmmsp.Add(ssp[n]);
                }

                if (lmmsp.Count > 0)
                {
                    SeriesPoint[] mmsp = new SeriesPoint[lmmsp.Count];
                    Point[] mmpt = new Point[lmmsp.Count];

                    for (int i = 0; i < lmmsp.Count; i++)
                    {
                        mmsp[i] = lmmsp[i];
                        mmpt[i] = chartXy.GetDataPointNa(this, lmmsp[i], 0);
                    }

                    pd.SeriesPoints.Add(mmsp);
                    pd.Points.Add(mmpt);
                }
            }

            return (pd);
        }

        #endregion

        #region GetDataLabels

        private void GetDataLabels(Graphics g, List<PointLabel> plabels,
            ChartXy chartXy, ChartAxis axisX, ChartAxis axisY, DataLabelVisualStyle dstyle)
        {
            foreach (DataLabel dlabel in DataLabels)
            {
                DataLabelVisualStyle xstyle = dlabel.EffectiveDataLabelStyle;

                PointLabel pl = FindPointLabel(plabels, dlabel);

                if (pl != null)
                {
                    if (string.IsNullOrEmpty(dlabel.Text) == false)
                        pl.Label = dlabel.Text;

                    pl.DataLabelVisualStyle = xstyle;
                    pl.BarLabelPosition = dlabel.BarLabelPosition;

                    pl.LabelSize = MeasurePointLabel(g, pl);
                }
                else
                {
                    SeriesPoint sp = new SeriesPoint(dlabel.ValueX, dlabel.ValueY);

                    string label = (string.IsNullOrEmpty(dlabel.Text) == false) ? dlabel.Text :
                            GetPointLabelText(sp, axisX, axisY, xstyle);

                    Point pt = chartXy.GetDataPointNa(this, sp, 0);

                    pl = new PointLabel(sp, pt, label);

                    pl.IsDataLabel = true;

                    pl.DataLabelVisualStyle = xstyle;
                    pl.BarLabelPosition = dlabel.BarLabelPosition;

                    pl.LabelSize = MeasurePointLabel(g, pl);

                    plabels.Add(pl);
                }
            }
        }

        #region FindPointLabel

        private PointLabel FindPointLabel(List<PointLabel> plabels, DataLabel dlabel)
        {
            for (int i = 0; i < plabels.Count; i++)
            {
                SeriesPoint sp = plabels[i].SeriesPoint;

                if ((sp.ValueX != null) &&
                    (sp.ValueY != null && sp.ValueY.Length > 0) &&
                    (sp.ValueX.Equals(dlabel.ValueX) && sp.ValueY[0].Equals(dlabel.ValueY)))
                {
                    return (plabels[i]);
                }
            }

            return (null);
        }

        #endregion

        #endregion

        #region IsBarOrigin

        internal bool IsBarOrigin(ChartXy chartXy, SeriesPoint sp)
        {
            object value = ((sp.ValueY != null && sp.ValueY.Length > 1) ? sp.ValueY[1] : (chartXy.BarOrigin ?? 0));

            ChartAxis axis = AxisY ?? chartXy.AxisY;

            switch (axis.ScaleType)
            {
                case ScaleType.Quantitative:
                    double d1 = Convert.ToDouble(value);
                    double d2 = Convert.ToDouble(sp.ValueY[0]);

                    return (d1.Equals(d2));

                case ScaleType.Qualitative:
                    string s1 = axis.QualitativeValues[0] as string;
                    string s2 = sp.ValueY[0] as string;

                    if (s1 != null)
                        return (s1.Equals(s2));
                    break;
            }

            return (false);
        }

        #endregion

        #region GetPointLabelText

        private string GetPointLabelText(SeriesPoint sp,
            ChartAxis axisX, ChartAxis axisY, DataLabelVisualStyle dstyle)
        {
            string pattern = dstyle.TextFormat;

            if (string.IsNullOrEmpty(pattern) == true)
                return (GetDefaultPointLabelText(sp, axisX, axisY, dstyle));

            pattern = pattern.Replace("\\n", "\n");
            pattern = pattern.Replace("\\r", "\r");

            Regex regex = new Regex("{([^}]*)}");
            MatchCollection mc = regex.Matches(pattern);

            StringBuilder sb = new StringBuilder();

            int index = 0;

            foreach (Match ma in mc)
            {
                if (ma.Index > index)
                    sb.Append(pattern.Substring(index, ma.Index - index));

                sb.Append(ProcessFormatSpecifier(sp, axisX, axisY, ma.Value));

                index = ma.Index + ma.Length;
            }

            if (index < pattern.Length)
                sb.Append(pattern.Substring(index));

            return (sb.ToString());
        }

        #region ProcessFormatSpecifier

        private string ProcessFormatSpecifier(
            SeriesPoint sp, ChartAxis axisX, ChartAxis axisY, string pattern)
        {
            string s = pattern.Substring(1, pattern.Length - 2);

            int n = s.IndexOf(':');

            if ((uint)n > s.Length - 1)
                n = s.Length;

            string placeHolder = s.Substring(0, n).Trim().ToUpper();
            string formatSpecifier = (n + 1 < s.Length) ? s.Substring(n + 1) : "";

            try
            {
                switch (placeHolder)
                {
                    case "X":
                        return (GetPointLabelText(sp.ValueX, axisX, formatSpecifier));

                    case "Y":
                    case "Y0":
                        if (sp.ValueY != null && sp.ValueY.Length > 0)
                            return (GetPointLabelText(sp.ValueY[0], axisY, formatSpecifier));

                        return ("");

                    case "S":
                    case "SNAME":
                        if (string.IsNullOrEmpty(formatSpecifier) == false)
                            return (String.Format(formatSpecifier, Name));

                        return (Name);

                    default:
                        if (placeHolder.StartsWith("Y") == true)
                        {
                            int index = int.Parse(placeHolder.Substring(1));

                            if (sp.ValueY != null && sp.ValueY.Length > index)
                                return (GetPointLabelText(sp.ValueY[index], axisY, formatSpecifier));
                        }

                        return (s);
                }
            }
            catch
            {
            }

            return (s);
        }

        #endregion

        #region GetDefaultPointLabelText

        private string GetDefaultPointLabelText(SeriesPoint sp,
            ChartAxis axisX, ChartAxis axisY, DataLabelVisualStyle dstyle)
        {
            String text = string.Empty;

            if (IsBarSeries == true)
            {
                text = GetPointLabelText(sp.ValueY[0], axisY, string.Empty);
            }
            else
            {
                text = GetPointLabelText(sp.ValueX, axisX, string.Empty);

                if (sp.ValueY != null)
                    text += " : " + GetPointLabelText(sp.ValueY[0], axisY, string.Empty);
            }

            return (text);
        }

        #endregion

        #region GetPointLabelText

        private string GetPointLabelText(
            object value, ChartAxis axis, string format)
        {
            switch (axis.ScaleType)
            {
                case ScaleType.DateTime:
                    if (string.IsNullOrEmpty(format) == false)
                    {
                        if (value is DateTime)
                        {
                            DateTime date = (DateTime)value;

                            return (date.ToString(format));
                        }
                    }

                    return (GetDateTimeLabelText(axis, (DateTime)value));

                case ScaleType.Qualitative:
                    if (string.IsNullOrEmpty(format) == false)
                        return (string.Format(format, value));

                    return (value.ToString());

                default:
                    double d = Convert.ToDouble(value);

                    if (string.IsNullOrEmpty(format) == false)
                        return (d.ToString(format));

                    return (d.ToString("F3"));
            }
        }

        #region GetDateTimeLabelText

        internal string GetDateTimeLabelText(ChartAxis axis, DateTime dt)
        {
            switch (axis.ActualDateTimeUnits)
            {
                case DateTimeUnits.Ticks:
                    return (dt.Ticks.ToString());

                case DateTimeUnits.Milliseconds:
                    return (dt.Millisecond.ToString());

                case DateTimeUnits.Seconds:
                    return (dt.Second.ToString());

                case DateTimeUnits.Minutes:
                    return (dt.Minute.ToString());

                case DateTimeUnits.Hours:
                    return (dt.ToShortTimeString());

                case DateTimeUnits.Days:
                    return (dt.ToShortDateString());

                case DateTimeUnits.Months:
                    return (dt.Year + " " + dt.Month);

                default:
                    return (dt.Year.ToString());
            }
        }

        #endregion

        #endregion

        #endregion

        #region MeasurePointLabel

        internal Size MeasurePointLabel(Graphics g, PointLabel pl)
        {
            DataLabelVisualStyle dstyle = GetPointLabelVisualStyle(pl);

            int width = (dstyle.MaxTextWidth > 0) ? dstyle.MaxTextWidth : 0;

            using (StringFormat sf = new StringFormat())
            {
                if (dstyle.MaxTextLineCount <= 1)
                    sf.FormatFlags |= StringFormatFlags.NoWrap;

                Size size = g.MeasureString(pl.Label, dstyle.Font, width, sf).ToSize();
                size.Width++;

                if (dstyle.MaxTextLineCount > 1)
                {
                    int lineHeight = (int)(Math.Ceiling(dstyle.Font.GetHeight())) * dstyle.MaxTextLineCount;

                    if (size.Height > lineHeight)
                        size.Height = lineHeight;
                }

                return (size);
            }
        }

        #region GetPointLabelVisualStyle

        internal DataLabelVisualStyle GetPointLabelVisualStyle(PointLabel pl)
        {
            DataLabelVisualStyle dstyle = EffectiveDataLabelStyle.Copy();

            if (pl.DataLabelVisualStyle != null)
                dstyle.ApplyStyle(pl.DataLabelVisualStyle);
            else
                dstyle = EffectiveDataLabelStyle;

            return (dstyle);
        }

        #endregion

        #endregion

        #endregion

        #region GetRotateDegrees

        internal RotateDegrees GetRotateDegrees(DataLabelVisualStyle dstyle)
        {
            RotateDegrees degrees = dstyle.RotateDegrees;

            if (degrees == RotateDegrees.Auto || degrees == RotateDegrees.NotSet)
            {
                switch (SeriesType)
                {
                    case SeriesType.HorizontalBar:
                    case SeriesType.HorizontalHiLoBar:
                        return (RotateDegrees.None);

                    case SeriesType.VerticalBar:
                    case SeriesType.VerticalHiLoBar:
                        return (RotateDegrees.Rotate270);

                    default:
                        return (RotateDegrees.None);
                }
            }

            return (dstyle.RotateDegrees);
        }

        #endregion

        #region IsConvexHullPoint

        /// <summary>
        /// Determines whether the given SeriesPoint is a ConvexHull point.
        /// </summary>
        /// <param name="sp"></param>
        /// <returns></returns>
        public bool IsConvexHullPoint(SeriesPoint sp)
        {
            if (sp != null && _ConvexHullPoints != null)
            {
                ChartXy chartXy = Parent as ChartXy;

                if (chartXy != null)
                {
                    ConvexHullDisplayMode mode = GetConvexHullDisplayMode(chartXy);

                    if (mode != ConvexHullDisplayMode.None)
                    {
                        foreach (Point ptc in _ConvexHullPoints)
                        {
                            if (ptc.Equals(sp.Point[0]) == true)
                                return (true);
                        }
                    }
                }
            }

            return (false);
        }

        #endregion

        #region IsHighLightPoint

        /// <summary>
        /// Determines if the given SeriesPoint is a HighLight Point (a
        /// point highlighted by the Crosshair setup).
        /// </summary>
        /// <param name="sp"></param>
        /// <returns></returns>
        public bool IsHighLightPoint(SeriesPoint sp)
        {
            if (sp != null)
            {
                ChartXy chartXy = Parent as ChartXy;

                if (chartXy != null)
                    return (chartXy.IsCrosshairSeriesPoint(this, sp.Point[0]));
            }

            return (false);
        }

        #endregion

        #region Style handling

        #region ApplyStyles

        public override void ApplyStyles(BaseVisualStyle style)
        {
            ChartSeriesVisualStyle sstyle = style as ChartSeriesVisualStyle;

            if (sstyle != null)
            {
                ApplyParentStyles(sstyle, Parent as ChartContainer);

                sstyle.ApplyStyle(ChartSeriesVisualStyle);

                ApplyDefaultLineStyles(sstyle.LineStyle);
                ApplyDefaultLineStyles(sstyle.SplineStyle);
                ApplyDefaultLineStyles(sstyle.StepLineStyle);
                ApplyDefaultLineStyles(sstyle.EmptyStyle);

                ApplyDefaultMarkerStyles(sstyle.MarkerVisualStyle);
                ApplyDefaultMarkerStyles(sstyle.MarkerEmptyVisualStyle);

                if (sstyle.EmptyAreaBackground.IsEmpty)
                    sstyle.EmptyAreaBackground = new Background(Color.FromArgb(100, Color.LightGray));

                if (SeriesType == SeriesType.Bubble)
                {
                    if (sstyle.MarkerVisualStyle.Background.IsEmpty)
                        sstyle.MarkerVisualStyle.Background = new Background(DefaultPaletteColor);
                }

                ApplyDefaultBarStyles(sstyle.BarVisualStyle);
                ApplyDefaultOhlcBarStyles(sstyle.HiLoBarVisualStyle);
            }
            else if (style is DataLabelVisualStyle)
            {
                DataLabelVisualStyle dstyle = (DataLabelVisualStyle)style;

                ApplyParentStyles(dstyle, Parent as ChartContainer);

                dstyle.ApplyStyle(_DataLabelVisualStyle);

                dstyle.ApplyDefaults();
            }
       }

        #region ApplyParentStyles (ChartSeriesVisualStyle)

        private void ApplyParentStyles(ChartSeriesVisualStyle pstyle, ChartContainer item)
        {
            if (item != null)
            {
                ApplyParentStyles(pstyle, item.Parent as ChartContainer);

                if (item is ChartXy)
                    pstyle.ApplyStyle(((ChartXy)item).ChartSeriesVisualStyle);

                if (item is ChartPanel)
                    pstyle.ApplyStyle(((ChartPanel)item).DefaultVisualStyles.ChartSeriesVisualStyle);
            }
            else
            {
                pstyle.ApplyStyle(ChartControl.BaseVisualStyles.ChartSeriesVisualStyle);
                pstyle.ApplyStyle(ChartControl.DefaultVisualStyles.ChartSeriesVisualStyle);
            }
        }

        #endregion

        #region ApplyParentStyles (DataLabelVisualStyle)

        private void ApplyParentStyles(DataLabelVisualStyle dstyle, ChartContainer item)
        {
            if (item != null)
            {
                ApplyParentStyles(dstyle, item.Parent as ChartContainer);

                if (item is BaseChart)
                    dstyle.ApplyStyle(((ChartXy)item).DataLabelVisualStyle);

                if (item is ChartPanel)
                    dstyle.ApplyStyle(((ChartPanel)item).DefaultVisualStyles.DataLabelVisualStyle);
            }
            else
            {
                dstyle.ApplyStyle(ChartControl.BaseVisualStyles.DataLabelVisualStyle);
                dstyle.ApplyStyle(ChartControl.DefaultVisualStyles.DataLabelVisualStyle);
            }
        }

        #endregion

        #region ApplyDefaultLineStyles

        private void ApplyDefaultLineStyles(ChartLineVisualStyle lstyle)
        {
            if (lstyle.LineColor.IsEmpty == true)
                lstyle.LineColor = DefaultPaletteColor;

            lstyle.ApplyDefaults();
        }

        #endregion

        #region ApplyDefaultMarkerStyles

        private void ApplyDefaultMarkerStyles(PointMarkerVisualStyle pstyle)
        {
            if (pstyle.Background.IsEmpty && pstyle.BorderColor.IsEmpty)
                pstyle.BorderColor = DefaultPaletteColor;

            pstyle.ApplyDefaults();
        }

        #endregion

        #region ApplyDefaultBarStyles

        private void ApplyDefaultBarStyles(ChartBarVisualStyle bstyle)
        {
            if (bstyle.Background.IsEmpty == true)
                bstyle.Background = new Background(DefaultPaletteColor);

            ApplyDefaultLineStyles(bstyle.Border);
        }

        #endregion

        #region ApplyDefaultOhlcBarStyles

        private void ApplyDefaultOhlcBarStyles(ChartHiLoBarVisualStyle bstyle)
        {
            HiLoBarSegmentStyle sstyle = bstyle.DefaultSegmentStyle;

            if (sstyle.Default.LineColor.IsEmpty == true)
                sstyle.Default.LineColor = Color.Black;

            sstyle.Default.ApplyDefaults();

            switch (HiLoBarType)
            {
                case HiLoBarType.Candle:
                    bool backSet = (sstyle.BoxBackground.IsEmpty == true);

                    if (backSet == true)
                        sstyle.BoxBackground = new Background(DefaultPaletteColor);

                    Background bk = sstyle.BoxBackground;

                    sstyle = bstyle.AlternateSegmentStyle;

                    if (sstyle.BoxBackground.IsEmpty == true)
                    {
                        if (backSet == true)
                        {
                            sstyle.BoxBackground = new Background(Color.Black, DefaultPaletteColor);
                            sstyle.BoxBackground.HatchFillType = HatchFillType.ForwardDiagonal;
                        }
                        else
                        {
                            if (bk.IsSolidBrush == true)
                            {
                                sstyle.BoxBackground = new Background(Color.Black, bk.Color1);
                                sstyle.BoxBackground.HatchFillType = HatchFillType.ForwardDiagonal;
                            }
                            else if (bk.Color1.IsEmpty == false && bk.Color2.IsEmpty == false)
                            {
                                sstyle.BoxBackground = new Background(bk.Color2, bk.Color1);
                            }
                        }
                    }
                    break;

                case Charts.HiLoBarType.Box:
                    if (sstyle.BoxBackground.IsEmpty == true)
                        sstyle.BoxBackground = new Background(DefaultPaletteColor);
                    break;
            }

            sstyle = bstyle.DefaultSegmentStyle;

            _RenderFullDefRange = sstyle.CenterLine.IsEmpty &&
                sstyle.HighWhisker.IsEmpty && sstyle.LowWhisker.IsEmpty;

            sstyle = bstyle.AlternateSegmentStyle;

            _RenderFullAltRange = sstyle.CenterLine.IsEmpty &&
                sstyle.HighWhisker.IsEmpty && sstyle.LowWhisker.IsEmpty;
        }

        private bool _RenderFullDefRange;
        private bool _RenderFullAltRange;

        #endregion

        #endregion

        #region ClearEffectiveStyles

        protected override void ClearEffectiveStyles()
        {
            if (_EffectiveChartSeriesStyle.InvalidateStyle() == true)
                InvalidateLayout();

            if (_EffectiveDataLabelStyle.InvalidateStyle() == true)
                InvalidateLayout();

            foreach (DataLabel dl in DataLabels)
                dl.InvalidateStyle();

            if (LegendItem != null)
                LegendItem.EffectiveStyles.InvalidateStyles();

            PointMarkerImage = null;
            PointMarkerEmptyImage = null;
            PointMarkerHighlightImage = null;
        }

        #endregion

        #region StyleChanged

        protected override void StyleChanged(object sender, PropertyChangedEventArgs e)
        {
            base.StyleChanged(sender, e);

            if (sender is ChartLegendItemVisualStyles && LegendItem != null)
                InvalidateRender(LegendItem.Bounds);
        }

        #endregion

        #endregion

        #region ILegendItem

        #region OnCheckStateChanged

        internal override void OnCheckStateChanged()
        {
            if (IsQualitativeXValues || IsQualitativeYValues)
                InvalidateLayout();

            if (PointLabelDisplayMode != PointLabelDisplayMode.None)
                InvalidatePointLabels();

            base.OnCheckStateChanged();
        }

        #endregion

        #region AddSubLegendItems

        internal override void AddSubLegendItems(List<ChartLegendItem> list)
        {
            foreach (ChartIndicator ci in ChartIndicators)
            {
                if (ci.Visible == true)
                {
                    ChartLegendItem li = ci.GetLegendItem();

                    if (li != null)
                        list.Add(li);
                }
            }
        }

        #endregion

        #region GetLegendItemColorEx

        internal override Color GetLegendItemColorEx()
        {
            ChartXy chartXy = Parent as ChartXy;

            ChartSeriesVisualStyle sstyle = EffectiveChartSeriesStyle;
            PointMarkerVisualStyle pstyle = sstyle.MarkerVisualStyle;

            if (sstyle.ItemColor.IsEmpty == false)
                return (sstyle.ItemColor);

            switch (SeriesType)
            {
                case SeriesType.Bubble:
                case SeriesType.Point:
                case SeriesType.HorizontalDot:
                case SeriesType.VerticalDot:
                    return (pstyle.Background.Color1);

                case SeriesType.Line:
                    ChartLineDisplayMode mode = GetLineDisplayMode(chartXy);

                    if ((mode & ChartLineDisplayMode.DisplayLine) == ChartLineDisplayMode.DisplayLine)
                    {
                        if (sstyle.LineStyle.LineColor.IsEmpty == false)
                            return (sstyle.LineStyle.LineColor);
                    }

                    if ((mode & ChartLineDisplayMode.DisplaySpline) == ChartLineDisplayMode.DisplaySpline)
                    {
                        if (sstyle.SplineStyle.LineColor.IsEmpty == false)
                            return (sstyle.SplineStyle.LineColor);
                    }

                    if ((mode & ChartLineDisplayMode.DisplayStepLine) == ChartLineDisplayMode.DisplayStepLine)
                    {
                        if (sstyle.StepLineStyle.LineColor.IsEmpty == false)
                            return (sstyle.StepLineStyle.LineColor);
                    }

                    return (pstyle.Background.Color1);

                case SeriesType.HorizontalBar:
                case SeriesType.VerticalBar:
                    return (sstyle.BarVisualStyle.Background.Color1);

                case SeriesType.HorizontalHiLoBar:
                case SeriesType.VerticalHiLoBar:
                    HiLoBarSegmentStyle hstyle = sstyle.HiLoBarVisualStyle.DefaultSegmentStyle;

                    if (HiLoBarType == HiLoBarType.Line)
                    {
                        if (hstyle.Default.LineColor.IsEmpty == false)
                            return (hstyle.Default.LineColor);

                        return (hstyle.CenterLine.LineColor);
                    }
                        
                    return (hstyle.BoxBackground.Color1);
            }

            return (Color.Empty);
        }

        #endregion

        #region RenderLegendItemMarkerEx

        internal override void RenderLegendItemMarkerEx(
            Graphics g, ChartLegendItem litem, ChartLegendItemVisualStyle style)
        {
            ChartXy chartXy = Parent as ChartXy;
            ChartSeriesVisualStyle sstyle = EffectiveChartSeriesStyle;

            Rectangle bounds = litem.MarkerBounds;

            switch (SeriesType)
            {
                case SeriesType.HorizontalHiLoBar:
                case SeriesType.VerticalHiLoBar:
                    RenderHiLoBarMarker(g, bounds, chartXy, sstyle);
                    break;

                case SeriesType.VerticalBar:
                case SeriesType.HorizontalBar:
                    RenderBarMarker(g, bounds, chartXy, sstyle);
                    break;

                case SeriesType.Bubble:
                    RenderBubbleMarker(g, bounds, chartXy, sstyle);
                    break; ;

                case SeriesType.VerticalDot:
                case SeriesType.HorizontalDot:
                case SeriesType.Point:
                    RenderDotMarker(g, bounds, chartXy, sstyle);
                    break;

                case SeriesType.Line:
                    RenderLineMarker(g, bounds, chartXy, sstyle);
                    break;

                default:
                    RenderDefaultMarker(g, bounds, sstyle);
                    break;
            }
        }

        #region RenderHiLoBarMarker

        private void RenderHiLoBarMarker(Graphics g,
            Rectangle bounds, ChartXy chartXy, ChartSeriesVisualStyle sstyle)
        {
            Rectangle r = bounds;
            r.Inflate(-1, -1);

            if (r.Width > 0 && r.Height > 0)
            {
                SmoothingMode sm = g.SmoothingMode;
                g.SmoothingMode = SmoothingMode.None;

                HiLoBarSegmentStyle hstyle = sstyle.HiLoBarVisualStyle.DefaultSegmentStyle;

                if (HiLoBarType == HiLoBarType.Line)
                {
                    Color color = hstyle.Default.LineColor;

                    if (color.IsEmpty == true)
                        color = hstyle.CenterLine.LineColor;

                    if (color.IsEmpty == true)
                        color = DefaultPaletteColor;

                    if (color.IsEmpty == true)
                        color = Color.Black;

                    if (IsRotated == true || r.Width > r.Height)
                        RenderHiLoHBarMarker(g, r, color);
                    else
                        RenderHiLoVBarMarker(g, r, color);
                }
                else
                {
                    Background bk = hstyle.BoxBackground;
                    ChartLineVisualStyle lstyle = hstyle.BoxBorder;

                    if (IsRotated == true || r.Width > r.Height)
                        RenderHBoxMarker(g, r, bk, hstyle, lstyle);
                    else
                        RenderVBoxMarker(g, r, bk, hstyle, lstyle);
                }

                g.SmoothingMode = sm;
            }
        }

        #region RenderHBoxMarker

        private void RenderHBoxMarker(Graphics g, Rectangle r,
            Background bk, HiLoBarSegmentStyle hstyle, ChartLineVisualStyle lstyle)
        {
            int n = r.Height / 4;

            Rectangle t = r;
            t.Inflate(-n, -n);

            if (t.Height % 2 != 0)
            {
                t.Y--;
                t.Height++;
            }

            using (Brush br = bk.GetBrush(t))
                g.FillRectangle(br, t);

            Color lineColor = lstyle.LineColor;

            if (lineColor.IsEmpty == true)
                lineColor = hstyle.Default.LineColor;

            if (lineColor.IsEmpty == true)
                lineColor = Color.Black;

            using (Pen pen = new Pen(lineColor))
            {
                Point pt1 = new Point(r.X, (r.Y + r.Bottom) / 2);
                Point pt2 = new Point(t.X, pt1.Y);

                g.DrawLine(pen, pt1, pt2);

                pt1.X = t.Right;
                pt2.X = r.Right;

                g.DrawLine(pen, pt1, pt2);
            }

            using (Pen pen = new Pen(lineColor))
                g.DrawRectangle(pen, t);
        }

        #endregion

        #region RenderVBoxMarker

        private void RenderVBoxMarker(Graphics g, Rectangle r,
            Background bk, HiLoBarSegmentStyle hstyle, ChartLineVisualStyle lstyle)
        {
            int n = r.Width / 4;

            Rectangle t = r;
            t.Inflate(-n, -n);

            if (t.Width % 2 != 0)
            {
                t.X--;
                t.Width++;
            }

            using (Brush br = bk.GetBrush(t))
                g.FillRectangle(br, t);

            Color lineColor = lstyle.LineColor;

            if (lineColor.IsEmpty == true)
                lineColor = hstyle.Default.LineColor;

            if (lineColor.IsEmpty == true)
                lineColor = Color.Black;

            using (Pen pen = new Pen(lineColor))
            {
                Point pt1 = new Point((r.X + r.Right) / 2, r.Y);
                Point pt2 = new Point(pt1.X, t.Y);

                g.DrawLine(pen, pt1, pt2);

                pt1.Y = t.Bottom;
                pt2.Y = r.Bottom;

                g.DrawLine(pen, pt1, pt2);
            }

            using (Pen pen = new Pen(lineColor))
                g.DrawRectangle(pen, t);
        }

        #endregion

        #region RenderHiLoHBarMarker

        private void RenderHiLoHBarMarker(Graphics g, Rectangle r, Color color)
        {
            Point pt1 = new Point(r.X, (r.Y + r.Bottom) / 2);
            Point pt2 = new Point(r.Right, pt1.Y);

            using (Pen pen = new Pen(color))
            {
                g.DrawLine(pen, pt1, pt2);

                int n = (r.Bottom - r.Top) / 3;

                pt1.X = r.X + (r.Width / 4);
                pt1.Y -= n;

                pt2.X = pt1.X;

                g.DrawLine(pen, pt1, pt2);

                pt1.X = r.X + (r.Width / 4) * 3;
                pt1.Y += (2 * n);
                pt2.X = pt1.X;

                g.DrawLine(pen, pt1, pt2);
            }
        }

        #endregion

        #region RenderHiLoVBarMarker

        private void RenderHiLoVBarMarker(Graphics g, Rectangle r, Color color)
        {
            Point pt1 = new Point((r.X + r.Right) / 2, r.Y);
            Point pt2 = new Point(pt1.X, r.Bottom);

            using (Pen pen = new Pen(color))
            {
                g.DrawLine(pen, pt1, pt2);

                int n = (r.Right - r.Left) / 3;

                pt1.X -= n;
                pt1.Y = r.Y + (r.Height / 4);
                pt2.Y = pt1.Y;

                g.DrawLine(pen, pt1, pt2);

                pt1.X += (2 * n);
                pt1.Y = r.Y + (r.Height / 4) * 3;
                pt2.Y = pt1.Y;

                g.DrawLine(pen, pt1, pt2);
            }
        }

        #endregion

        #endregion

        #region RenderBarMarker

        private void RenderBarMarker(Graphics g, Rectangle bounds, ChartXy chartXy, ChartSeriesVisualStyle sstyle)
        {
            ChartLineVisualStyle cstyle = sstyle.BarVisualStyle.Border;
            Background bk = sstyle.BarVisualStyle.Background;

            Rectangle r = bounds;
            r.Inflate(-1, -1);

            using (Brush br = bk.GetBrush(r))
            {
                g.FillRectangle(br, r);

                if (cstyle.LineColor.IsEmpty == false && cstyle.LinePattern != LinePattern.None)
                {
                    using (Pen pen = new Pen(cstyle.LineColor, cstyle.LineWidth))
                    {
                        if (cstyle.LinePattern != LinePattern.NotSet)
                            pen.DashStyle = (DashStyle)cstyle.LinePattern;

                        g.DrawRectangle(pen, r);
                    }
                }
            }
        }

        #endregion

        #region RenderBubbleMarker

        private void RenderBubbleMarker(Graphics g,
            Rectangle bounds, ChartXy chartXy, ChartSeriesVisualStyle sstyle)
        {
            PointMarkerVisualStyle pstyle = sstyle.MarkerVisualStyle;

            Background bk = pstyle.Background;

            Rectangle r = bounds;
            r.Inflate(-1, -1);

            using (Brush br = pstyle.Background.GetBrush(r))
            {
                g.FillEllipse(br, r);

                if (pstyle.BorderColor.IsEmpty == false && pstyle.BorderWidth > 0)
                {
                    using (Pen pen = new Pen(pstyle.BorderColor, pstyle.BorderWidth))
                        g.DrawEllipse(pen, r);
                }
            }
        }

        #endregion

        #region RenderDotMarker

        private void RenderDotMarker(Graphics g,
            Rectangle bounds, ChartXy chartXy, ChartSeriesVisualStyle sstyle)
        {
            PointMarkerVisualStyle pstyle = sstyle.MarkerVisualStyle;

            Image marker = pstyle.GetPointMarkerImage();

            if (marker != null)
            {
                g.DrawImage(marker, bounds);
            }
            else
            {
                marker = chartXy.GetPointMarker(g, pstyle.Type, pstyle.PointCount,
                    bounds.Size, pstyle.Rotation, pstyle.Background,
                    pstyle.BorderColor, pstyle.BorderWidth);

                if (marker != null)
                {
                    // Make allowances for the fact that GetPointMarker() adjusts the
                    // size and pos of the image to allow for better anti-aliasing

                    bounds.X--;
                    bounds.Y--;

                    g.DrawImageUnscaled(marker, bounds);
                }
                else
                {
                    RenderDefaultMarker(g, bounds, sstyle);
                }
            }
        }

        #endregion

        #region RenderLineMarker

        private void RenderLineMarker(Graphics g,
            Rectangle bounds, ChartXy chartXy, ChartSeriesVisualStyle sstyle)
        {
            ChartLineDisplayMode mode = GetLineDisplayMode(chartXy);

            int n = bounds.Height / 2;

            using (Pen pen = new Pen(GetLegendItemColor()))
            {
                g.DrawLine(pen,
                    new Point(bounds.X, bounds.Y + n),
                    new Point(bounds.Right - 1, bounds.Y + n));
            }

            if ((mode & ChartLineDisplayMode.DisplayPoints) == ChartLineDisplayMode.DisplayPoints)
            {
                n = Math.Min(bounds.Height, bounds.Width);
                n = (int)Math.Ceiling((double)n / 2);

                if (n % 2 == 0)
                    n++;

                Rectangle r = bounds;

                r.X += ((r.Width - n) / 2);
                r.Y += ((r.Height - n) / 2);

                r.Width = n;
                r.Height = n;

                PointMarkerVisualStyle pstyle = sstyle.MarkerVisualStyle;

                Image marker2 = chartXy.GetPointMarker(g, pstyle.Type, pstyle.PointCount,
                    r.Size, 0, pstyle.Background, pstyle.BorderColor, pstyle.BorderWidth > 0 ? 1 : 0);

                if (marker2 != null)
                {
                    // Make allowances for the fact that GetPointMarker() adjusts the
                    // size and pos of the image to allow for better anti-aliasing

                    r.X--;
                    r.Y--;

                    g.DrawImageUnscaled(marker2, r);
                }
                else
                {
                    RenderDefaultMarker(g, bounds, sstyle);
                }
            }
        }

        #endregion

        #endregion

        #endregion

        #region Copy/CopyTo

        public override ChartVisualElement Copy()
        {
            ChartSeries copy = new ChartSeries();

            CopyTo(copy);

            return (copy);
        }

        public override void CopyTo(ChartVisualElement copy)
        {
            ChartSeries c = copy as ChartSeries;

            if (c != null)
            {
                base.CopyTo(c);

                c.AreaBaseValue = AreaBaseValue;

                c.AxisX = AxisX;
                c.AxisY = AxisY;

                c.BarFillRange = BarFillRange;
                c.BarLabelPosition = BarLabelPosition;
                c.BarShadingEnabled = BarShadingEnabled;
                c.BarWidthRatio = BarWidthRatio;

                c.BubbleIntensityMode = BubbleIntensityMode;
                c.BubbleMaxPercentage = BubbleMaxPercentage;
                c.BubbleMinSize = BubbleMinSize;
                c.BubbleScaleFactor = BubbleScaleFactor;
                c.BubbleSizeMode = BubbleSizeMode;

                foreach (ChartIndicator ci in ChartIndicators)
                    c.ChartIndicators.Add((ChartIndicator)ci.Copy());

                c.ChartLineAreaDisplayMode = ChartLineAreaDisplayMode;
                c.ChartLineDisplayMode = ChartLineDisplayMode;

                c.ChartSeriesVisualStyle =
                    (_ChartSeriesVisualStyle != null) ? _ChartSeriesVisualStyle.Copy() : null;

                c.ConvexHullDisplayMode = ConvexHullDisplayMode;

                c.CrosshairEnabled = CrosshairEnabled;
                c.CrosshairHighlightPoints = CrosshairHighlightPoints;
                c.CrosshairShowLabels = CrosshairShowLabels;

                foreach (DataLabel dl in DataLabels)
                    c.DataLabels.Add((DataLabel)dl.Copy());

                c.DataLabelVisualStyle =
                    (_DataLabelVisualStyle != null) ? _DataLabelVisualStyle.Copy() : null;

                c.DisplayLinePointsOnTop = DisplayLinePointsOnTop;
                c.DotPlotIndexValue = DotPlotIndexValue;

                c.EmptyValues = EmptyValues;
                c.EnableEmptyValues = EnableEmptyValues;

                c.GroupId = GroupId;
                c.HiLoBarType = HiLoBarType;
                c.CrosshairHighlightSinglePoint = CrosshairHighlightSinglePoint;

                c.PointLabelDisplayMode = PointLabelDisplayMode;
                c.PointLabelMinDistance = PointLabelMinDistance;
                c.PointLabelSkip = PointLabelSkip;

                c.ScaleTypeX = ScaleTypeX;
                c.ScaleTypeY = ScaleTypeY;

                foreach (SeriesPoint sp in SeriesPoints)
                    c.SeriesPoints.Add(sp.Copy());

                c.SeriesType = SeriesType;

                c.ShowEmptyLines = ShowEmptyLines;
                c.ShowEmptyPoints = ShowEmptyPoints;
                c.ShowHiLoBarMedianLines = ShowHiLoBarMedianLines;
                c.ShowOriginValueLabels = ShowOriginValueLabels;
                c.StackQualitativePoints = StackQualitativePoints;

                c.StepLines = StepLines;
                c.StepLineMode = StepLineMode;
            }
        }

        #endregion

        #region GetSerialData

        internal override SerialElementCollection GetSerialData(string serialName)
        {
            SerialElementCollection sec = new SerialElementCollection();

            if (serialName != null)
            {
                if (serialName.Equals("") == true)
                    serialName = "ChartSeries";

                sec.AddStartElement(serialName);
            }

            sec.AddDataValue("AreaBaseValue", AreaBaseValue, null);

            if (AxisX != null && string.IsNullOrEmpty(AxisX.Name) == false)
                sec.AddValue("AxisX", AxisX.Name);

            if (AxisY != null && string.IsNullOrEmpty(AxisY.Name) == false)
                sec.AddValue("AxisY", AxisY.Name);

            sec.AddValue("BarFillRange", BarFillRange, BarFillRange.NotSet);
            sec.AddValue("BarLabelPosition", BarLabelPosition, BarLabelPosition.NotSet);
            sec.AddValue("BarShadingEnabled", BarShadingEnabled, Tbool.NotSet);
            sec.AddValue("BarWidthRatio", BarWidthRatio, 0d);

            sec.AddValue("BubbleIntensityMode", BubbleIntensityMode, BubbleIntensityMode.NotSet);
            sec.AddValue("BubbleMaxPercentage", BubbleMaxPercentage, 0.25d);
            sec.AddValue("BubbleMinSize", BubbleMinSize, 4);
            sec.AddValue("BubbleScaleFactor", BubbleScaleFactor, 1.0d);
            sec.AddValue("BubbleSizeMode", BubbleSizeMode, BubbleSizeMode.NotSet);

            if (_ChartIndicators != null && _ChartIndicators.Count > 0)
            {
                sec.AddStartElement("ChartIndicators count=\"" + _ChartIndicators.Count + "\"");

                foreach (ChartIndicator ci in _ChartIndicators)
                    sec.AddElement(ci.GetSerialData(""));

                sec.AddEndElement("ChartIndicators");
            }

            sec.AddValue("ChartLineAreaDisplayMode", ChartLineAreaDisplayMode, ChartLineAreaDisplayMode.NotSet);
            sec.AddValue("ChartLineDisplayMode", ChartLineDisplayMode, ChartLineDisplayMode.NotSet);

            if (_ChartSeriesVisualStyle != null)
                sec.AddElement(_ChartSeriesVisualStyle.GetSerialData("ChartSeriesVisualStyle"));

            sec.AddValue("ConvexHullDisplayMode", ConvexHullDisplayMode, ConvexHullDisplayMode.NotSet);

            sec.AddValue("CrosshairEnabled", CrosshairEnabled, Tbool.NotSet);
            sec.AddValue("CrosshairHighlightPoints", CrosshairHighlightPoints, Tbool.NotSet);
            sec.AddValue("CrosshairHighlightSinglePoint", CrosshairHighlightSinglePoint, Tbool.NotSet);
            sec.AddValue("CrosshairShowLabels", CrosshairShowLabels, Tbool.NotSet);

            if (_DataLabels != null && _DataLabels.Count > 0)
            {
                sec.AddStartElement("DataLabels count=\"" + _DataLabels.Count + "\"");

                foreach (DataLabel dl in _DataLabels)
                    sec.AddElement(dl.GetSerialData(""));

                sec.AddEndElement("DataLabels");
            }

            if (_DataLabelVisualStyle != null)
                sec.AddElement(_DataLabelVisualStyle.GetSerialData("DataLabelVisualStyle"));

            sec.AddValue("DisplayLinePointsOnTop", DisplayLinePointsOnTop, true);
            sec.AddValue("DotPlotIndexValue", DotPlotIndexValue, 1.0d);

            if (_EmptyValues != null && _EmptyValues.Length > 0)
            {
                sec.AddStartElement("EmptyValues count=\"" + _EmptyValues.Length + "\"");

                foreach (object value in _EmptyValues)
                    sec.AddValue("EmptyValue", value);

                sec.AddEndElement("EmptyValues");
            }

            sec.AddValue("EnableEmptyValues", EnableEmptyValues, false);

            sec.AddValue("GroupId", GroupId, 0);
            sec.AddValue("HiLoBarType", HiLoBarType, HiLoBarType.Box);

            sec.AddValue("PointLabelDisplayMode", PointLabelDisplayMode, PointLabelDisplayMode.NotSet);
            sec.AddValue("PointLabelMinDistance", PointLabelMinDistance, 0);
            sec.AddValue("PointLabelSkip", PointLabelSkip, 0);

            sec.AddValue("ScaleTypeX", ScaleTypeX, ScaleType.NotSet);
            sec.AddValue("ScaleTypeY", ScaleTypeY, ScaleType.NotSet);

            if (_SeriesPoints != null && _SeriesPoints.Count > 0)
            {
                sec.AddStartElement("SeriesPoints count=\"" + _SeriesPoints.Count + "\"");

                foreach (SeriesPoint sp in _SeriesPoints)
                    sec.AddElement(sp.GetSerialData());

                sec.AddEndElement("SeriesPoints");
            }

            sec.AddValue("SeriesType", SeriesType, SeriesType.Point);

            sec.AddValue("ShowEmptyLines", ShowEmptyLines, false);
            sec.AddValue("ShowEmptyPoints", ShowEmptyPoints, false);
            sec.AddValue("ShowHiLoBarMedianLines", ShowHiLoBarMedianLines, false);
            sec.AddValue("ShowOriginValueLabels", ShowOriginValueLabels, true);

            sec.AddValue("StackQualitativePoints", StackQualitativePoints, true);

            sec.AddValue("StepLines", StepLines, StepLines.NotSet);
            sec.AddValue("StepLineMode", StepLineMode, StepLineMode.NotSet);

            sec.AddElement(base.GetSerialData(null));

            if (serialName != null)
                sec.AddEndElement(serialName);

            return (sec);
        }

        #endregion

        #region PutSerialData

        #region ProcessValue

        internal override void ProcessValue(SerialElement se)
        {
            ChartXy chartXy = Parent as ChartXy;

            switch (se.Name)
            {
                case "AreaBaseValue":
                    AreaBaseValue = se.DataValue;
                    break;

                case "AxisX":
                    if (chartXy != null)
                        AxisX = GetAncillaryAxis(chartXy.AncillaryAxesX, se.GetValueString());
                    break;

                case "AxisY":
                    if (chartXy != null)
                        AxisY = GetAncillaryAxis(chartXy.AncillaryAxesY, se.GetValueString());
                    break;

                case "BarFillRange":
                    BarFillRange = (BarFillRange)se.GetValueEnum(typeof(BarFillRange));
                    break;

                case "BarLabelPosition":
                    BarLabelPosition = (BarLabelPosition)se.GetValueEnum(typeof(BarLabelPosition));
                    break;

                case "BarShadingEnabled":
                    BarShadingEnabled = (Tbool)se.GetValueEnum(typeof(Tbool));
                    break;

                case "BarWidthRatio":
                    BarWidthRatio = double.Parse(se.StringValue);
                    break;

                case "BubbleIntensityMode":
                    BubbleIntensityMode = (BubbleIntensityMode)se.GetValueEnum(typeof(BubbleIntensityMode));
                    break;

                case "BubbleMaxPercentage":
                    BubbleMaxPercentage = double.Parse(se.StringValue);
                    break;

                case "BubbleMinSize":
                    BubbleMinSize = int.Parse(se.StringValue);
                    break;

                case "BubbleScaleFactor":
                    BubbleScaleFactor = double.Parse(se.StringValue);
                    break;

                case "BubbleSizeMode":
                    BubbleSizeMode = (BubbleSizeMode)se.GetValueEnum(typeof(BubbleSizeMode));
                    break;

                case "ChartLineAreaDisplayMode":
                    ChartLineAreaDisplayMode = (ChartLineAreaDisplayMode)se.GetValueEnum(typeof(ChartLineAreaDisplayMode));
                    break;

                case "ChartLineDisplayMode":
                    ChartLineDisplayMode = (ChartLineDisplayMode)se.GetValueEnum(typeof(ChartLineDisplayMode));
                    break;

                case "ConvexHullDisplayMode":
                    ConvexHullDisplayMode = (ConvexHullDisplayMode)se.GetValueEnum(typeof(ConvexHullDisplayMode));
                    break;

                case "CrosshairEnabled":
                    CrosshairEnabled = (Tbool)se.GetValueEnum(typeof(Tbool));
                    break;

                case "CrosshairHighlightPoints":
                    CrosshairHighlightPoints = (Tbool)se.GetValueEnum(typeof(Tbool));
                    break;

                case "CrosshairHighlightSinglePoint":
                    CrosshairHighlightSinglePoint = (Tbool)se.GetValueEnum(typeof(Tbool));
                    break;

                case "CrosshairShowLabels":
                    CrosshairShowLabels = (Tbool)se.GetValueEnum(typeof(Tbool));
                    break;

                case "DisplayLinePointsOnTop":
                    DisplayLinePointsOnTop = bool.Parse(se.StringValue);
                    break;

                case "DotPlotIndexValue":
                    DotPlotIndexValue = double.Parse(se.StringValue);
                    break;

                case "EmptyValues":
                    EmptyValues[se.ValueIndex] = se.DataValue;
                    break;

                case "EnableEmptyValues":
                    EnableEmptyValues = bool.Parse(se.StringValue);
                    break;

                case "GroupId":
                    GroupId = int.Parse(se.StringValue);
                    break;

                case "HiLoBarType":
                    HiLoBarType = (HiLoBarType)se.GetValueEnum(typeof(HiLoBarType));
                    break;

                case "PointLabelDisplayMode":
                    PointLabelDisplayMode = (PointLabelDisplayMode)se.GetValueEnum(typeof(PointLabelDisplayMode));
                    break;

                case "PointLabelMinDistance":
                    PointLabelMinDistance = int.Parse(se.StringValue);
                    break;

                case "PointLabelSkip":
                    PointLabelSkip = int.Parse(se.StringValue);
                    break;

                case "ScaleTypeX":
                    ScaleTypeX = (ScaleType)se.GetValueEnum(typeof(ScaleType));
                    break;

                case "ScaleTypeY":
                    ScaleTypeY = (ScaleType)se.GetValueEnum(typeof(ScaleType));
                    break;

                case "SeriesType":
                    SeriesType = (SeriesType)se.GetValueEnum(typeof(SeriesType));
                    break;

                case "ShowEmptyLines":
                    ShowEmptyLines = bool.Parse(se.StringValue);
                    break;

                case "ShowEmptyPoints":
                    ShowEmptyPoints = bool.Parse(se.StringValue);
                    break;

                case "ShowHiLoBarMedianLines":
                    ShowHiLoBarMedianLines = bool.Parse(se.StringValue);
                    break;

                case "ShowOriginValueLabels":
                    ShowOriginValueLabels = bool.Parse(se.StringValue);
                    break;

                case "StackQualitativePoints":
                    StackQualitativePoints = bool.Parse(se.StringValue);
                    break;

                case "StepLines":
                    StepLines = (StepLines)se.GetValueEnum(typeof(StepLines));
                    break;

                case "StepLineMode":
                    StepLineMode = (StepLineMode)se.GetValueEnum(typeof(StepLineMode));
                    break;

                default:
                    base.ProcessValue(se);
                    break;
            }
        }

        #region GetAncillaryAxis

        private ChartAxis GetAncillaryAxis(ChartAxesCollection axes, string name)
        {
            foreach (ChartAxis axis in axes)
            {
                if (name.Equals(axis.Name) == true)
                    return (axis);
            }

            return (null);
        }

        #endregion

        #endregion

        #region ProcessCollection

        internal override void ProcessCollection(SerialElement se)
        {
            SerialElementCollection sec = se.Sec;

            switch (se.Name)
            {
                case "ChartIndicators":
                    sec.PutSerialData(this);
                    break;

                case "ChartSeriesVisualStyle":
                    sec.PutSerialData(ChartSeriesVisualStyle);
                    break;

                case "DataLabel":
                    sec.PutSerialData(DataLabels[se.ValueIndex]);
                    break;

                case "DataLabels":
                    sec.PutSerialData(this);
                    break;

                case "DataLabelVisualStyle":
                    sec.PutSerialData(DataLabelVisualStyle);
                    break;

                case "EmptyValues":
                    if (se.ArrayCount > 0)
                    {
                        EmptyValues = new object[se.ArrayCount];

                        sec.PutSerialData(this);
                    }
                    break;

                case "RegressionLine":
                    string rname = se.Sec.GetItemValue("Name");

                    RegressionLine reg = ChartIndicators[rname] as RegressionLine;

                    if (reg != null)
                        ChartIndicators.Remove(reg);

                    reg = new RegressionLine(rname);

                    if (reg != null)
                    {
                        sec.PutSerialData(reg);

                        ChartIndicators.Add(reg);
                    }
                    break;

                case "SeriesPoints":
                    if (se.ArrayCount > 0)
                    {
                        SeriesPoints = new SeriesPointCollection();

                        sec.PutSerialData(this);
                    }
                    break;

                case "SeriesPoint":
                    SeriesPoint sp = new SeriesPoint();

                    sec.PutSerialData(sp);

                    SeriesPoints.Add(sp);
                    break;

                case "TrendLine":
                    string tname = se.Sec.GetItemValue("Name");

                    TrendLine trend = ChartIndicators[tname] as TrendLine;

                    if (trend != null)
                        ChartIndicators.Remove(trend);

                    trend = new TrendLine(tname);

                    if (trend != null)
                    {
                        sec.PutSerialData(trend);

                        ChartIndicators.Add(trend);
                    }
                    break;

                default:
                    base.ProcessCollection(se);
                    break;
            }
        }

        #endregion

        #endregion

        #region Series States

        [Flags]
        private enum States : uint
        {
            FilterIgnoreMatchCase = (1U << 0),

            CheckedInLegend = (1U << 1),
            ShowInLegend = (1U << 2),
            ShowInParentLegend = (1U << 3),
            ShowCheckBoxInLegend = (1U << 4),
            ShowMarkerInLegend = (1U << 5),

            IsSorted = (1U << 6),
            IsRotated = (1U << 7),

            StackQualitativePoints = (1U << 8),
            DisplayLinePointsOnTop = (1U << 9),

            EnableEmptyValues = (1U << 10),
            ShowEmptyLines = (1U << 11),
            ShowEmptyPoints = (1U << 12),
            ShowOriginValueLabels = (1U << 13),
            ShowHiLoBarMedianLines = (1U << 14),

            NeedToUpdateBindings = (1U << 15),

            IsInnerRingSeries = (1U << 16),
            IsOuterRingSeries = (1U << 17),

            IsOffset = (1U << 18),
            IsDetached = (1U << 19),

            ShowInnerRingsEx = (1U << 20),
        }

        #region TestState

        private bool TestState(States state)
        {
            return ((_States & state) == state);
        }

        #endregion

        #region SetState

        private void SetState(States state, bool value)
        {
            if (value == true)
                _States |= state;
            else
                _States &= ~state;
        }

        #endregion

        #endregion

        #region IDisposable

        public override void Dispose()
        {
            AxisX = null;
            AxisY = null;
            ChartIndicators = null;
            ChartLegendItemVisualStyles = null;
            ChartSeriesVisualStyle = null;
            DataLabels = null;
            DataLabelVisualStyle = null;
            SeriesPoints = null;

            base.Dispose();
        }

        #endregion
    }

    #region SortedSeriesPoints

    public class SortedSeriesPoints
    {
        #region Private variables

        private ChartSeries _ChartSeries;
        private SeriesPointCollection _Spc;

        private int[] _IndexArray;
        private int[] _CountArray;

        private int _SeriesLayoutCount;

        private double _Slope = double.NaN;
        private double _Intercept = double.NaN;

        private bool _SlopeCalculated;
        private int _SlopeIndex;

        #endregion

        public SortedSeriesPoints(ChartSeries series, bool sortPoints)
        {
            _ChartSeries = series;
            _Spc = series.SeriesPoints;

            if (sortPoints == true)
                _IndexArray = CreateIndexArray(_Spc);
        }

        #region Public properties

        #region Count

        public int Count
        {
            get
            {
                if (_IndexArray != null)
                    return (_IndexArray.Length);

                return (_Spc.Count);
            }
        }

        #endregion

        #region Indexer[int]

        public SeriesPoint this[int index]
        {
            get
            {
                if (_IndexArray != null)
                    index = _IndexArray[index];

                return (_Spc[index]);
            }
        }

        #endregion

        #region IsSorted

        public bool IsSorted
        {
            get { return (_ChartSeries.IsSorted); }
        }

        #endregion

        #region SeriesLayoutCount

        public int SeriesLayoutCount
        {
            get { return (_SeriesLayoutCount); }

            set
            {
                if (value != _SeriesLayoutCount)
                    _SeriesLayoutCount = value;
            }
        }

        #endregion

        #endregion

        #region Internal properties

        #region CountArray

        internal int[] CountArray
        {
            get { return (_CountArray); }
            set { _CountArray = value; }
        }

        #endregion

        #region IndexArray

        internal int[] IndexArray
        {
            get { return (_IndexArray); }
            set { _IndexArray = value; }
        }

        #endregion

        #region Intercept

        internal double Intercept
        {
            get
            {
                if (_SlopeCalculated == false)
                    CalcSeriesSlope();

                return (_Intercept);
            }

            set { _Intercept = value; }
        }

        #endregion

        #region Slope

        internal double Slope
        {
            get
            {
                if (_SlopeCalculated == false)
                    CalcSeriesSlope();

                return (_Slope);
            }

            set { _Slope = value; }
        }

        #endregion

        #region SlopeIndex

        internal int SlopeIndex
        {
            get { return (_SlopeIndex); }

            set
            {
                if (_SlopeIndex != value)
                {
                    _SlopeIndex = value;
                    _SlopeCalculated = false;
                }
            }
        }

        #endregion

        #endregion

        #region CreateIndexArray

        private int[] CreateIndexArray(SeriesPointCollection spc)
        {
            int[] indexArray = new int[_Spc.Count];
            object[] keyArray = new object[_Spc.Count];

            for (int i = 0; i < _Spc.Count; i++)
            {
                indexArray[i] = i;
                keyArray[i] = _Spc[i].ValueX;
            }

            Array.Sort(keyArray, indexArray);

            return (indexArray);
        }

        #endregion

        #region SearchX

        public int SearchX(object okey)
        {
            ChartXy chartXy = _ChartSeries.Parent as ChartXy;

            if (IsSorted == true)
            {
                int min = 0;
                int max = Count - 1;

                while (min <= max)
                {
                    int mid = (min + max) / 2;

                    int cmp = chartXy.DataCompare(okey, this[mid].ValueX);

                    if (cmp > 0)
                        min = mid + 1;

                    else if (cmp < 0)
                        max = mid - 1;

                    else
                        return (mid);
                }

                return (-((min > 0) ? min - 1 : 0));
            }
            else
            {
                for (int i = 0; i < Count; i++)
                {
                    if (chartXy.DataCompare(okey, this[i].ValueX) == 0)
                        return (i);
                }

                return (-1);
            }
        }

        #endregion

        #region SearchY

        public int SearchY(object okey)
        {
            ChartXy chartXy = _ChartSeries.Parent as ChartXy;

            for (int i = 0; i < _Spc.Count; i++)
            {
                if (_Spc[i].ValueY[0].Equals(okey))
                    return (i);
            }

            return (0);
        }

        #endregion

        #region GetQualitativeXIndex

        internal int GetQualitativeXIndex(object okey)
        {
            int index;

            if (okey is string)
                index = _ChartSeries.QualitativeXValues.IndexOf((string)okey);
            else
                index = Convert.ToInt32(okey);

            return (index);
        }

        #endregion

        #region GetQualitativeYIndex

        internal int GetQualitativeYIndex(object okey)
        {
            int index;

            if (okey is string)
                index = _ChartSeries.QualitativeYValues.IndexOf((string)okey);
            else
                index = Convert.ToInt32(okey);

            return (index);
        }

        #endregion

        #region CalcSeriesSlope

        private void CalcSeriesSlope()
        {
            ChartXy chartXy = _ChartSeries.Parent as ChartXy;

            if (chartXy != null)
            {
                ChartAxis axisX = _ChartSeries.AxisX ?? chartXy.AxisX;
                ChartAxis axisY = _ChartSeries.AxisY ?? chartXy.AxisY;

                if (_ChartSeries.ActualScaleTypeX != ScaleType.NotSet)
                {
                    int n = Count;

                    double sumX = 0;
                    double sumY = 0;
                    double sumXx = 0;
                    double sumXy = 0;

                    int nn = 0;

                    for (int i = 0; i < n; i++)
                    {
                        SeriesPoint sp = this[i];

                        if (sp.IsEmpty == false && (sp.ValueY.Length > _SlopeIndex))
                        {
                            nn++;

                            double x;

                            switch (_ChartSeries.ActualScaleTypeX)
                            {
                                case ScaleType.DateTime:
                                    x = chartXy.GetDateTimePointValue(axisX,
                                        axisX.TickmarkLayout, (DateTime)sp.ValueX, (DateTime)_ChartSeries.MinValueX);
                                    break;

                                case ScaleType.Qualitative:
                                    x = _ChartSeries.QualitativeXValues.IndexOf(sp.ValueX);
                                    break;

                                default:
                                    x = Convert.ToDouble(sp.ValueX);
                                    break;
                            }

                            double y;

                            switch (_ChartSeries.ActualScaleTypeY)
                            {
                                case ScaleType.DateTime:
                                    y = chartXy.GetDateTimePointValue(axisY, axisY.TickmarkLayout, (DateTime)sp.ValueY[_SlopeIndex]);
                                    break;

                                case ScaleType.Qualitative:
                                    y = _ChartSeries.QualitativeYValues.IndexOf(sp.ValueY[_SlopeIndex]);
                                    break;

                                default:
                                    y = Convert.ToDouble(sp.ValueY[_SlopeIndex]);
                                    break;
                            }

                            sumX += x;
                            sumY += y;

                            sumXx += (x * x);
                            sumXy += (x * y);
                        }
                    }

                    double a = nn * sumXy;
                    double b = sumX * sumY;
                    double c = nn * sumXx;
                    double d = sumX * sumX;

                    double m = (a - b) / (c - d);
                    double yi = (sumY - (m * sumX)) / nn;

                    Slope = m;
                    Intercept = yi;

                    _SlopeCalculated = true;
                }
            }
        }

        #endregion

        #region GetSeriesPoint

        internal SeriesPoint GetSeriesPoint(object key)
        {
            if (Count > 0)
            {
                int index;

                if (this[0].IsQuantitativeXValue == true)
                    index = SearchX(key);
                else
                    index = GetQualitativeXIndex(key) - 1;

                if (index < 0 && IsSorted == true)
                    index = -index;

                if ((uint)index < Count)
                    return (this[index]);
            }

            return (null);
        }

        #endregion
    }

    #endregion

    #region PointData

    public class PointData
    {
        public List<Point[]> Points;
        public List<SeriesPoint[]> SeriesPoints;
    }

    #endregion

    #region BubblePlotData

    internal class BubblePlotData
    {
        public double MinSize;
        public double MaxSize;

        public double TotalSize;

        public double MinIntensity;
        public double MaxIntensity;

        public void Clear()
        {
            MinSize = double.MaxValue;
            MaxSize = double.MinValue;

            MinIntensity = double.MaxValue;
            MaxIntensity = double.MinValue;

            TotalSize = 0;
        }
    }

    #endregion

    #region BarRenderData

    internal class BarRenderData
    {
        public ChartAxis Axis;
        public ChartXy ChartXy;

        public BarFillRange FillRange;
        public bool BarShading;

        public Point Spt;
        public SeriesPoint Sp;

        public ChartSeriesVisualStyle SeriesStyle;

        public BarRenderData(ChartXy chartXy, ChartAxis axis)
        {
            ChartXy = chartXy;
            Axis = axis;
        }
    }

    #endregion

    #region HiLoRenderData

    public class HiLoRenderData
    {
        #region Private variables

        private ChartAxis _Axis;
        private ChartXy _ChartXy;

        private Point _Spt;
        private SeriesPoint _Sp;
        private int _Index;

        private ChartSeriesVisualStyle _SeriesStyle;

        private int[] _Value;

        private bool _IsAlternate;
        private int _EndDelta;

        #endregion

        public HiLoRenderData(ChartXy chartXy, ChartAxis axis)
        {
            _ChartXy = chartXy;
            _Axis = axis;
        }

        #region Public properties

        #region AlternateStyle

        /// <summary>
        /// Gets the alternate segment style used when Open/Close values are reversed.
        /// </summary>
        public HiLoBarSegmentStyle AlternateStyle
        {
            get { return (SeriesStyle.HiLoBarVisualStyle.AlternateSegmentStyle); }
        }

        #endregion

        #region DefaultStyle

        /// <summary>
        /// Gets the default segment style used when Open/Close values are not reversed.
        /// </summary>
        public HiLoBarSegmentStyle DefaultStyle
        {
            get { return (SeriesStyle.HiLoBarVisualStyle.DefaultSegmentStyle); }
        }

        #endregion

        #region IsAlternate

        /// <summary>
        /// Gets whether the segment is to be render as 'Alternate'.
        /// </summary>
        public bool IsAlternate
        {
            get { return (_IsAlternate); }
            internal set { _IsAlternate = value; }
        }

        #endregion

        #region SeriesStyle

        /// <summary>
        /// Gets the associated series visual style.
        /// </summary>
        public ChartSeriesVisualStyle SeriesStyle
        {
            get { return (_SeriesStyle); }
            internal set { _SeriesStyle = value; }
        }

        #endregion

        #region Value

        /// <summary>
        /// Gets an array of specified HiLo coordinate data values (x or y,
        /// depending upon the bar orientation). The values are specified
        /// in [High=0, Low=1, Close=2, Open=3, Median=4] order, followed
        /// by any 'extra' user supplied bar values.
        /// </summary>
        public int[] Value
        {
            get { return (_Value); }
            internal set { _Value = value; }
        }

        #endregion

        #endregion

        #region Internal properties

        #region Axis

        internal ChartAxis Axis
        {
            get { return (_Axis); }
            set { _Axis = value; }
        }

        #endregion

        #region ChartXy

        internal ChartXy ChartXy
        {
            get { return (_ChartXy); }
            set { _ChartXy = value; }
        }

        #endregion

        #region EndDelta

        public int EndDelta
        {
            get { return (_EndDelta); }
            set { _EndDelta = value; }
        }

        #endregion

        #region Index

        internal int Index
        {
            get { return (_Index); }
            set { _Index = value; }
        }

        #endregion

        #region Sp

        internal SeriesPoint Sp
        {
            get { return (_Sp); }
            set { _Sp = value; }
        }

        #endregion

        #region Spt

        internal Point Spt
        {
            get { return (_Spt); }
            set { _Spt = value; }
        }

        #endregion

        #endregion
    }

    #endregion

    #region enums

    #region BarLabelPosition

    /// <summary>
    /// Specifies the position for Bar series labels.
    /// </summary>
    public enum BarLabelPosition
    {
        /// <summary>
        /// Not set (default is Center). 
        /// </summary>
        NotSet = -1,

        /// <summary>
        /// Labels will be positioned in the center of the bar. 
        /// </summary>
        Center,

        /// <summary>
        /// Labels will be positioned outside the bar, relative to its origin. 
        /// </summary>
        Near,

        /// <summary>
        /// Labels will be positioned inside the bar, relative to its origin. 
        /// </summary>
        NearInside,

        /// <summary>
        /// Labels will be positioned outside the bar, opposite to its origin. 
        /// </summary>
        Far,

        /// <summary>
        /// Labels will be positioned inside the bar, opposite to its origin. 
        /// </summary>
        FarInside,
    }

    #endregion

    #region BarSegment

    public enum BarSegment
    {
        /// <summary>
        /// Top portion of Vertical bar (full area).
        /// </summary>
        Top,

        /// <summary>
        /// Partial Top area of Vertical bar.
        /// </summary>
        TopPartial,

        /// <summary>
        /// Bottom portion of Vertical bar (full area).
        /// </summary>
        Bottom,

        /// <summary>
        /// Partial Bottom area of Vertical bar.
        /// </summary>
        BottomPartial,

        /// <summary>
        /// Left portion of Horizontal bar (full area).
        /// </summary>
        Left,

        /// <summary>
        /// Partial Left area of Horizontal bar.
        /// </summary>
        LeftPartial,

        /// <summary>
        /// Right portion of Horizontal bar (full area).
        /// </summary>
        Right,

        /// <summary>
        /// Partial Right area of Horizontal bar.
        /// </summary>
        RightPartial,
    }

    #endregion

    #region ConvexHullDisplayMode

    /// <summary>
    /// Specifies the ConvexHull display mode
    /// </summary>
    [Flags]
    public enum ConvexHullDisplayMode
    {
        /// <summary>
        /// Not set (default is None). 
        /// </summary>
        NotSet = 0,

        /// <summary>
        /// No Convex Hull processing will take place. 
        /// </summary>
        None = (1 << 0),

        /// <summary>
        /// Convex Hull border will be displayed.
        /// </summary>
        DisplayBorder = (1 << 1),

        /// <summary>
        /// Convex Hull background area will be displayed.
        /// </summary>
        DisplayBackground = (1 << 2),
    }

    #endregion

    #region PointLabelDisplayMode

    /// <summary>
    /// Specifies which PointLabels are to be displayed
    /// </summary>
    [Flags]
    public enum PointLabelDisplayMode
    {
        /// <summary>
        /// Not set (default is None). 
        /// </summary>
        NotSet,

        /// <summary>
        /// No labels will be displayed. 
        /// </summary>
        None = (1 << 0),

        /// <summary>
        /// All series points will display a label. 
        /// </summary>
        AllSeriesPoints = (1 << 1),

        /// <summary>
        /// User defined DataLabels will be displayed.
        /// </summary>
        DataLabels = (1 << 2),

        /// <summary>
        /// Minimum 'X' Value label will be displayed.
        /// </summary>
        MinValueX = (1 << 3),

        /// <summary>
        /// Minimum 'Y' Value label will be displayed.
        /// </summary>
        MinValueY = (1 << 4),

        /// <summary>
        /// Maximum 'X' Value label will be displayed.
        /// </summary>
        MaxValueX = (1 << 5),

        /// <summary>
        /// Maximum 'Y' Value label will be displayed.
        /// </summary>
        MaxValueY = (1 << 6),
    }

    #endregion

    #region StepLineMode

    /// <summary>
    /// Specifies the mode used to render "Step Lines" in
    /// a given Line series.
    /// </summary>
    public enum StepLineMode
    {
        /// <summary>
        /// Not set (default is HorizontalThenVertical). 
        /// </summary>
        NotSet = -1,

        /// <summary>
        /// No Step Lines will be rendered. 
        /// </summary>
        None,

        /// <summary>
        /// Step lines will be displayed between consecutive
        /// series points, by first displaying the horizontal step
        /// line, followed by the connecting vertical step line. 
        /// </summary>
        HorizontalThenVertical,

        /// <summary>
        /// Step lines will be displayed between consecutive
        /// series points, by first displaying the vertical step
        /// line, followed by the connecting horizontal step line. 
        /// </summary>
        VerticalThenHorizontal,

        /// <summary>
        /// Step lines will be displayed between consecutive
        /// series points, by first displaying the midPoint horizontal
        /// step line, followed by the connecting vertical step line. 
        /// </summary>
        MidPoint,
    }

    #endregion

    #region StepLines

    /// <summary>
    /// Specifies the mode used to render "Stepped Lines" in
    /// a given Line series.
    /// </summary>
    public enum StepLines
    {
        /// <summary>
        /// Not set (default is StepHv). 
        /// </summary>
        NotSet = -1,

        /// <summary>
        /// No step lines will be displayed. 
        /// </summary>
        None,

        /// <summary>
        /// Horizontal step lines will be displayed. 
        /// </summary>
        Horizontal,

        /// <summary>
        /// Vertical step lines will be displayed. 
        /// </summary>
        Vertical,

        /// <summary>
        /// Both horizontal and vertical step lines will be displayed. 
        /// </summary>
        Both,
    }

    #endregion

    #region ScaleType

    /// <summary>
    /// Specifies the scale type for the series points
    /// </summary>
    public enum ScaleType
    {
        /// <summary>
        /// ScaleType is NotSet (default is 'Auto').
        /// </summary>
        NotSet,

        /// <summary>
        /// ScaleType is Automatic.  Scale type will be determined
        /// by the underlying, assigned data.
        /// </summary>
        Auto,

        /// <summary>
        /// DateTime data scale. Points will be treated as
        /// DateTime values and will be shown as such on the axis. 
        /// </summary>
        DateTime,

        /// <summary>
        /// Numerical data scale. Points will be treated as
        /// numerical values and will be shown on the axis as numbers.
        /// </summary>
        Quantitative,

        /// <summary>
        /// Qualitative data scale. Points will be treated as 
        /// qualitative values and will be shown on the axis as text.
        /// </summary>
        Qualitative,

    }

    #endregion

    #region HiLoBarType

    /// <summary>
    /// Specifies the HiloBar series display type.
    /// </summary>
    public enum HiLoBarType
    {
        /// <summary>
        /// Box Plot display. Display is identical to 'Candle' except:
        /// 1. Median separated segments are separately rendered using both
        /// default and alternate box backgrounds.
        /// 2. UseAlternateSegmentStyle defaults to false.
        /// </summary>
        Box,

        /// <summary>
        /// Candle Plot display. Display is identical to 'Box' except:
        /// 1. Mmedian separated segments are both rendered using either
        /// the default or alternate box background.
        /// 2. UseAlternateSegmentStyle defaults to true.
        /// </summary>
        Candle,

        /// <summary>
        /// Line plot display.
        /// </summary>
        Line,
    }

    #endregion

    #region HiLoBarSegment

    public enum HiLoBarSegment
    {
        /// <summary>
        /// Box (Box plot).
        /// </summary>
        Box,

        /// <summary>
        /// High whisker (Box, Candle, Line).
        /// </summary>
        HighWhisker,

        /// <summary>
        /// High whisker cap (Box, Candle, Line).
        /// </summary>
        HighWhiskerCap,

        /// <summary>
        /// Low whisker (Box, Candle, Line).
        /// </summary>
        LowWhisker,

        /// <summary>
        /// Low whisker cap (Box, Candle, Line).
        /// </summary>
        LowWhiskerCap,

        /// <summary>
        /// Open whisker (Line plot).
        /// </summary>
        OpenWhisker,

        /// <summary>
        /// Close whisker (Line Plot).
        /// </summary>
        CloseWhisker,

        /// <summary>
        /// Center line (Line plot).
        /// </summary>
        CenterLine,

        /// <summary>
        /// Full range (Line plot).
        /// </summary>
        FullRange,

        /// <summary>
        /// Median line (Box, Candle, Line).
        /// </summary>
        MedianLine,

        /// <summary>
        /// Bar shading (Box, Candle).
        /// </summary>
        BarShading,
    }

    #endregion

    #endregion

    #region AxisTypeConverter

    ///<summary>
    /// AxisTypeConverter
    ///</summary>
    public class AxisTypeConverter : TypeConverter
    {
        ///<summary>
        /// ConvertTo
        ///</summary>
        ///<param name="context"></param>
        ///<param name="culture"></param>
        ///<param name="value"></param>
        ///<param name="destinationType"></param>
        ///<returns></returns>
        public override object ConvertTo(
            ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            if (destinationType == typeof(string))
            {
                ChartAxis axis = value as ChartAxis;

                if (axis != null)
                {
                    if (string.IsNullOrEmpty(axis.Name) == false)
                        return (axis.Name);

                    return ("No Axis Name");
                }
            }

            return (base.ConvertTo(context, culture, value, destinationType));
        }
    }

    #endregion
}