public override void MouseDown (NSEvent theEvent)
{
PointF point = this.ConvertPointFromView (theEvent.LocationInWindow, null);
this.Host.FireMouseDown (Host, new MouseEventArgs (MouseButtons.Left, theEvent.ClickCount, (int)point.X, (int)point.Y, 0));
base.MouseDown (theEvent);
}
public override void MouseDragged (NSEvent theEvent)