toplevel = new ArdourCanvas::Rectangle (canvas->root());
toplevel->set (ArdourCanvas::Rect (0, 0, 10, 10));
toplevel->set_fill (true);
toplevel = new ArdourCanvas::Rectangle (canvas->root());
toplevel->set (ArdourCanvas::Rect (0, 0, 10, 10));
toplevel->set_fill (true);