69 lines
2.1 KiB
C#
69 lines
2.1 KiB
C#
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Windows.Forms;
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namespace PDADemo
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{
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public partial class ImageButton : Control
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{
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public ImageButton()
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{
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}
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Image backgroundImage;
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bool pressed = false;
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// Property for the background image to be drawn behind the button text.
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public Image BackgroundImage
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{
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get
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{
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return this.backgroundImage;
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}
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set
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{
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this.backgroundImage = value;
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}
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}
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// When the mouse button is pressed, set the "pressed" flag to true
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// and invalidate the form to cause a repaint. The .NET Compact Framework
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// sets the mouse capture automatically.
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protected override void OnMouseDown(MouseEventArgs e)
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{
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this.pressed = true;
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this.Invalidate();
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base.OnMouseDown(e);
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}
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// When the mouse is released, reset the "pressed" flag
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// and invalidate to redraw the button in the unpressed state.
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protected override void OnMouseUp(MouseEventArgs e)
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{
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this.pressed = false;
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this.Invalidate();
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base.OnMouseUp(e);
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}
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// Override the OnPaint method to draw the background image and the text.
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protected override void OnPaint(PaintEventArgs e)
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{
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e.Graphics.FillRectangle(new SolidBrush(SystemColors.ActiveCaption), e.ClipRectangle);
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if (this.backgroundImage != null)
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{
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ImageAttributes attr = new ImageAttributes();
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attr.SetColorKey(Color.Magenta, Color.Magenta);
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if (this.pressed)
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e.Graphics.DrawImage(this.backgroundImage, this.ClientRectangle, 0, 0, this.backgroundImage.Width, this.backgroundImage.Height, GraphicsUnit.Pixel, attr);
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else
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e.Graphics.DrawImage(this.backgroundImage, this.ClientRectangle, 0, 0, this.backgroundImage.Width, this.backgroundImage.Height, GraphicsUnit.Pixel, attr);
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}
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base.OnPaint(e);
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}
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}
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}
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