+Duple
+Item::item_to_window (ArdourCanvas::Duple const & d) const
+{
+ return _canvas->canvas_to_window (item_to_canvas (d));
+}
+
+Duple
+Item::window_to_item (ArdourCanvas::Duple const & d) const
+{
+ return _canvas->window_to_canvas (canvas_to_item (d));
+}
+
+ArdourCanvas::Rect
+Item::item_to_window (ArdourCanvas::Rect const & r) const
+{
+ return _canvas->canvas_to_window (item_to_canvas (r));
+}
+