/// <summary>
/// Helper method that performs a hit test using the specified point.
/// It deletes all strokes that were hit by the point
/// </summary>
/// <param name="pt">The point to use for hit testing</param>
private void EraseStrokes(Point pt, Stroke currentStroke)
{
// Use HitTest to find the collection of strokes that are intersected
// by the point. The HitTestRadius constant is used to specify the
// radius of the hit test circle in ink space coordinates (1 unit = .01mm).
Strokes strokesHit = myInkCollector.Ink.HitTest(pt, HitTestRadius);
if (null != currentStroke && strokesHit.Contains(currentStroke))
{
strokesHit.Remove(currentStroke);
}
// Delete all strokes that were hit by the point
myInkCollector.Ink.DeleteStrokes(strokesHit);
if (strokesHit.Count > 0)
{
// Repaint the screen to reflect the change
this.Refresh();
}
}