public override void Dispose()
{
if (rgn != null)
{
rgn.Dispose();
rgn = null;
}
}
protected override void OnViewerDoubleBufferPaint(System.Windows.Forms.PaintEventArgs e)
{
base.OnViewerDoubleBufferPaint(e);
System.Drawing.Rectangle visibleRectangle = System.Drawing.Rectangle.Intersect(e.ClipRectangle, _bitmapViewer.GetViewportBounds());
System.Drawing.Region prevClip = e.Graphics.Clip.Clone();
System.Drawing.Region newClip = new System.Drawing.Region(visibleRectangle);
try
{
e.Graphics.Clip = newClip;
_vObjectHost.DrawContent(e.Graphics, visibleRectangle, (ICoordinateMapper)_bitmapViewer);
}
finally
{
e.Graphics.Clip = prevClip;
newClip.Dispose();
}
_vObjectHost.CurrentDesigner.Draw(e.Graphics);
}