/// <summary>
/// <see cref="InvalidateStroke"/>
/// </summary>
/// <param name="iStroke">The Ink stroke to invalidate</param>
/// <param name="padding">Number of pixels to pad invalidation
/// rectangle in Ink space pixels</param>
public void InvalidateStroke(Microsoft.Ink.Stroke iStroke, int padding)
{
using (Graphics g = InkPicture.CreateGraphics())
{
Rectangle bb = iStroke.GetBoundingBox();
System.Drawing.Point upperLeft = new System.Drawing.Point(bb.X - padding, bb.Y - padding);
System.Drawing.Point lowerRight = new System.Drawing.Point(bb.Right + padding, bb.Bottom + padding);
InkPicture.Renderer.InkSpaceToPixel(g, ref upperLeft);
InkPicture.Renderer.InkSpaceToPixel(g, ref lowerRight);
InkPicture.Invalidate(new Rectangle(upperLeft.X, upperLeft.Y, lowerRight.X, lowerRight.Y));
}
}
public void ClearInkPicture(InkPicture inkPictureCtrl)
{
inkPictureCtrl.DefaultDrawingAttributes.Color = Color.Black;
inkPictureCtrl.Ink.DeleteStrokes();
Ink ink = new Ink();
inkPictureCtrl.InkEnabled = false;
inkPictureCtrl.Ink = ink;
inkPictureCtrl.InkEnabled = true;
inkPictureCtrl.Invalidate();
inkPictureCtrl.Refresh();
}
/// <summary>
/// Event Handler from Clear Menu Item Click Event
/// </summary>
/// <param name="sender">The control that raised the event.</param>
/// <param name="e">The event arguments.</param>
private void miClear_Click(object sender, System.EventArgs e)
{
// Delete the ink strokes and redraw
inkPicture1.Ink.DeleteStrokes(inkPicture1.Ink.Strokes);
inkPicture1.Invalidate();
}
