155 lines
3.8 KiB
C#
155 lines
3.8 KiB
C#
using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Windows.Forms;
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using System.Windows.Forms.Design;
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namespace DevComponents.Instrumentation.Design
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{
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[ToolboxItem(false)]
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public partial class RangeValueDropDown : UserControl
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{
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#region Private variables
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private float _Value;
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private bool _EscapePressed;
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private IWindowsFormsEditorService _EditorService;
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private ITypeDescriptorContext _Context;
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#endregion
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public RangeValueDropDown(float value, float minimum, float maximum,
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IWindowsFormsEditorService editorService, ITypeDescriptorContext context)
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{
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InitializeComponent();
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_EditorService = editorService;
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_Context = context;
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if (value < minimum)
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{
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if ((minimum * 1000 > Int16.MinValue) && (minimum * 1000 < Int16.MaxValue))
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minimum = value;
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}
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if (value > maximum)
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{
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if ((maximum * 1000 > Int16.MinValue) && (maximum * 1000 < Int16.MaxValue))
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maximum = value;
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}
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_TrackBar.Minimum = (int)(minimum * 1000);
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_TrackBar.Maximum = (int)(maximum * 1000);
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_TrackBar.SmallChange = _TrackBar.Maximum / 100;
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_TrackBar.LargeChange = _TrackBar.Maximum / 10;
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_TrackBar.TickFrequency = _TrackBar.LargeChange;
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_TrackBar.Value = (int)(value * 1000);
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_LabelMin.Text = String.Format("{0:f}", minimum);
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_LabelMax.Text = String.Format("{0:f}", maximum);
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Value = value;
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}
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public RangeValueDropDown()
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{
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InitializeComponent();
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}
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#region DefaultSize
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protected override Size DefaultSize
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{
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get { return new Size(186, 40); }
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}
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#endregion
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#region Public properties
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#region EditorService
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public IWindowsFormsEditorService EditorService
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{
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get { return (_EditorService); }
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set { _EditorService = value; }
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}
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#endregion
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#region EscapePressed
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public bool EscapePressed
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{
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get { return (_EscapePressed); }
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set { _EscapePressed = value; }
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}
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#endregion
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#region Value
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public float Value
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{
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get { return (_Value); }
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set
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{
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_Value = value;
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_LabelValue.Text = String.Format("{0:f3}", value);
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_LabelValue.Update();
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_Context.OnComponentChanging();
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_Context.PropertyDescriptor.SetValue(_Context.Instance, value);
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_Context.OnComponentChanged();
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}
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}
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#endregion
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#endregion
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#region OnResize
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protected override void OnResize(EventArgs e)
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{
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base.OnResize(e);
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int width = _TrackBar.Width;
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int dx = width / 3;
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_LabelMin.Width = dx;
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_LabelMax.Width = dx;
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_LabelValue.Width = dx;
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_LabelValue.Location = new Point((width - dx) / 2, _LabelValue.Location.Y);
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_LabelMax.Location = new Point(width - dx, _LabelMax.Location.Y);
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}
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#endregion
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#region _TrackBar_ValueChanged
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private void TrackBar_ValueChanged(object sender, EventArgs e)
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{
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Value = ((float)_TrackBar.Value) / 1000;
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}
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#endregion
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#region _TrackBar_PreviewKeyDown
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private void _TrackBar_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
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{
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if (e.KeyCode == Keys.Escape)
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_EscapePressed = true;
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}
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#endregion
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}
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}
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