DotNet 4.8.1 build of DotNetBar

PROMS/DotNetBar Source Code/DevComponents.DotNetBar.Schedule/VScrollPanel.cs

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+#if FRAMEWORK20
+using System;
+using System.Drawing;
+using System.Windows.Forms;
+
+namespace DevComponents.DotNetBar.Schedule
+{
+    public class VScrollPanel : BaseItem
+    {
+        #region Events
+        public event EventHandler<EventArgs> ScrollBarChanged;
+        #endregion
+
+        #region Variables
+
+        protected CalendarView CalendarView;    // CalendarView
+        private VScrollBarAdv _ScrollBar;       // Scroll bar
+
+        #endregion
+
+        /// <summary>
+        /// Constructor
+        /// </summary>
+        /// <param name="calendarView"></param>
+        public VScrollPanel(CalendarView calendarView)
+        {
+            CalendarView = calendarView;
+
+            SetUpScrollBar();
+        }
+
+        #region Public properties
+
+        /// <summary>
+        /// Gets and sets the panel Bounds
+        /// </summary>
+        public override Rectangle Bounds
+        {
+            get { return (base.Bounds); }
+
+            set
+            {
+                base.Bounds = value;
+
+                UpdateScrollBar();
+            }
+        } 
+
+        /// <summary>
+        /// Gets and sets the control visibility
+        /// </summary>
+        public override bool Visible
+        {
+            get { return (base.Visible); }
+
+            set
+            {
+                if (base.Visible != value)
+                {
+                    base.Visible = value;
+
+                    ScrollBar.Visible = value;
+
+                    if (value == true)
+                        ScrollBar.BringToFront();
+                }
+            }
+        }
+
+        /// <summary>
+        /// Gets the scrollBar
+        /// </summary>
+        public VScrollBarAdv ScrollBar
+        {
+            get { return (_ScrollBar); }
+        }
+
+        #endregion
+
+        #region Private properties
+
+        /// <summary>
+        /// Gets the scrollBar SmallChange value
+        /// </summary>
+        protected virtual int ScrollPanelSmallChange
+        {
+            get { return (1); }
+        }
+
+        /// <summary>
+        /// Gets the scrollBar Maximum value
+        /// </summary>
+        protected virtual int ScrollPanelMaximum
+        {
+            get { return (100); }
+        }
+
+        #endregion
+
+        #region SetupScrollBar
+
+        /// <summary>
+        /// Performs scrollBar setup
+        /// </summary>
+        private void SetUpScrollBar()
+        {
+            _ScrollBar = new VScrollBarAdv();
+
+            Control c = (Control)CalendarView.CalendarPanel.GetContainerControl(true);
+
+            if (c != null)
+                c.Controls.Add(_ScrollBar);
+
+            _ScrollBar.ValueChanged += ValueChanged;
+
+            UpdateScrollBar();
+        }
+
+        #endregion
+
+        #region UpdateScrollBar
+
+        /// <summary>
+        /// Updates our scrollbar
+        /// </summary>
+        internal void UpdateScrollBar()
+        {
+            _ScrollBar.Location = Bounds.Location;
+            _ScrollBar.Height = Bounds.Height;
+            _ScrollBar.Width = Bounds.Width;
+
+            _ScrollBar.LargeChange = Bounds.Height;
+            _ScrollBar.SmallChange = 1;
+            _ScrollBar.SmallChange = ScrollPanelSmallChange;
+            _ScrollBar.Maximum = ScrollPanelMaximum;
+
+            int n = _ScrollBar.Maximum - _ScrollBar.LargeChange + 1;
+
+            if (n < 0)
+            {
+                _ScrollBar.Maximum = Bounds.Height;
+                _ScrollBar.Value = 0;
+
+                _ScrollBar.Enabled = false;
+            }
+            else
+            {
+                _ScrollBar.Enabled = true;
+
+                if (_ScrollBar.Value > n)
+                    _ScrollBar.Value = n;
+                else
+                    Refresh();
+            }
+
+            OnScrollBarUpdate();
+        }
+
+        #endregion
+
+        #region DisableScrollBar
+
+        /// <summary>
+        /// Disables the scrollbar
+        /// </summary>
+        internal void DisableScrollBar()
+        {
+            _ScrollBar.Location = Bounds.Location;
+            _ScrollBar.Height = Bounds.Height;
+
+            _ScrollBar.LargeChange = Bounds.Height;
+            _ScrollBar.SmallChange = 1;
+            _ScrollBar.SmallChange = ScrollPanelSmallChange;
+            _ScrollBar.Maximum = Bounds.Height;
+
+            _ScrollBar.Value = 0;
+            _ScrollBar.Enabled = false;
+
+            OnScrollBarUpdate();
+        }
+
+        #endregion
+
+        #region ValueChanged
+
+        /// <param name="sender">object</param>
+        /// <param name="e">EventArgs</param>
+        void ValueChanged(object sender, EventArgs e)
+        {
+            OnScrollBarUpdate();
+        }
+
+        /// <summary>
+        /// Passes the scroll onto others
+        /// </summary>
+        private void OnScrollBarUpdate()
+        {
+            if (ScrollBarChanged != null)
+                ScrollBarChanged(this, EventArgs.Empty);
+        }
+
+        #endregion
+
+        #region IDisposable Members
+
+        protected override void Dispose(bool disposing)
+        {
+            if (_ScrollBar != null)
+            {
+                _ScrollBar.ValueChanged -= ValueChanged;
+                _ScrollBar.Dispose();
+            }
+
+            base.Dispose(disposing);
+        }
+
+        #endregion
+
+        #region Paint
+
+        public override void  Paint(ItemPaintArgs p)
+        {
+        }
+
+        #endregion
+
+        #region Copy
+
+        public override BaseItem Copy()
+        {
+            return (null);
+        }
+
+        #endregion
+    }
+}
+#endif