// Constructor.
public DrawingGraphics(IToolkit toolkit, Xsharp.Graphics graphics)
: base(toolkit)
{
this.graphics = graphics;
this.font = null;
this.gaveHdc = false;
}
// Handle a paint event from Xsharp.
protected override void OnPaint(Xsharp.Graphics graphics)
{
if(sink != null)
{
System.Drawing.Region clip = DrawingWindow.RegionToDrawingRegion
(graphics.ExposeRegion);
DrawingGraphics g = new DrawingGraphics(toolkit, graphics);
using(System.Drawing.Graphics gr =
ToolkitManager.CreateGraphics(g, clip))
{
sink.ToolkitExpose(gr);
}
}
}
// Convert an Xsharp.Region to System.Drawing.Region
internal static System.Drawing.Region RegionToDrawingRegion
(Xsharp.Region region)
{
Xsharp.Rectangle[] rectangles = region.GetRectangles();
System.Drawing.Region newRegion = new System.Drawing.Region();
newRegion.MakeEmpty();
for(int i = 0; i < rectangles.Length; i++)
{
Xsharp.Rectangle rect = rectangles[i];
newRegion.Union(new System.Drawing.Rectangle
(rect.x, rect.y, rect.width, rect.height));
}
return newRegion;
}