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diff --git a/src/gui/MachinaCanvas.hpp b/src/gui/MachinaCanvas.hpp
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+/*
+  This file is part of Machina.
+  Copyright 2007-2013 David Robillard <http://drobilla.net>
+
+  Machina 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 3 of the License, or any later version.
+
+  Machina 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 Machina.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef MACHINA_CANVAS_HPP_HPP
+#define MACHINA_CANVAS_HPP_HPP
+
+#include <string>
+
+#include "ganv/Canvas.hpp"
+#include "machina/types.hpp"
+
+using namespace Ganv;
+
+namespace machina {
+
+namespace client { class ClientObject; }
+
+namespace gui {
+
+class MachinaGUI;
+class NodeView;
+
+class MachinaCanvas : public Canvas
+{
+public:
+	MachinaCanvas(MachinaGUI* app, int width, int height);
+
+	void on_new_object(SPtr<machina::client::ClientObject> object);
+	void on_erase_object(SPtr<machina::client::ClientObject> object);
+
+	MachinaGUI* app() { return _app; }
+
+protected:
+	bool on_event(GdkEvent* event);
+
+	bool node_clicked(NodeView* node, GdkEventButton* ev);
+
+private:
+	void action_create_node(double x, double y);
+	void action_connect(NodeView* tail, NodeView* head);
+	void action_disconnect(NodeView* tail, NodeView* head);
+
+	static void connect_nodes(GanvNode* node, void* data);
+
+	MachinaGUI* _app;
+	NodeView*   _connect_node;
+	bool        _did_connect;
+};
+
+}  // namespace machina
+}  // namespace gui
+
+#endif // MACHINA_CANVAS_HPP_HPP