public void Invalidate (Rect area) { area.Offset (Allocation.X, Allocation.Y); OnInvalidate (area); }
protected void InvalidateRender (Rect area) { if (Parent == null) { OnInvalidate (area); } else { var alloc = Parent.ContentAllocation; area.Offset (alloc.X, alloc.Y); Parent.Invalidate (area); } }