Florence.GtkSharp.PlotWidget.UpdateCache C# (CSharp) Method

        void UpdateCache()
        {
            if (!allocated)
                return;

            if (bitmap_cache != null)
                bitmap_cache.Dispose ();

            int width = current_allocation.Width;
            int height = current_allocation.Height;

            bitmap_cache = new System.Drawing.Bitmap (width, height);
            using (Graphics g = Graphics.FromImage (bitmap_cache)) {
                // wrong: since x,y usually > 0 -> plot shifted down and right: current_allocation.X, current_allocation.Y
                var bounds = new Rectangle (0, 0, width, height);
                this.InteractivePlotSurface2D.DoDraw (g, bounds);
            }
        }