basic, initial structure for canvas widget item

libs/canvas/canvas/widget.h

@@ -0,0 +1,50 @@
+/*
+    Copyright (C) 2011-2013 Paul Davis
+    Author: Carl Hetherington <cth@carlh.net>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __CANVAS_WIDGET_H__
+#define __CANVAS_WIDGET_H__
+
+#include "canvas/visibility.h"
+#include "canvas/item.h"
+
+#include "gtkmm2ext/cairo_widget.h"
+
+namespace ArdourCanvas
+{
+
+class LIBCANVAS_API Widget : virtual public Item
+{
+public:
+	Widget (Group *, CairoWidget&);
+	
+	void render (Rect const &, Cairo::RefPtr<Cairo::Context>) const;
+	void compute_bounding_box () const;
+
+	CairoWidget const & get () const {
+		return _widget;
+	}
+
+private:
+	CairoWidget& _widget;
+	bool event_proxy (GdkEvent*);
+};
+
+}
+
+#endif