void AttachResizeGrip()
{
this.ExposeEvent += HandleExposeEvent;
this.MotionNotifyEvent += HandleMotionNotifyEvent;
this.ButtonPressEvent += HandleButtonPressEvent;
this.VisibilityNotifyEvent += HandleVisibilityNotifyEvent;
if ((this.WidgetFlags & Gtk.WidgetFlags.Realized) == 0)
this.Realized += HandleRealized;
else
HandleRealized (this, null);
}