static void UpdateAllArea(PixelFarm.Drawing.Skia.MySkiaCanvas mycanvas, IRenderElement topWindowRenderBox)
        {
            mycanvas.OffsetCanvasOrigin(-mycanvas.Left, -mycanvas.Top);
            Rectangle rect = mycanvas.Rect;
            topWindowRenderBox.DrawToThisCanvas(mycanvas, rect);
#if DEBUG
            topWindowRenderBox.dbugShowRenderPart(mycanvas, rect);
#endif

            mycanvas.IsContentReady = true;
            mycanvas.OffsetCanvasOrigin(mycanvas.Left, mycanvas.Top);
        }