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diff --git a/ingen/client/ObjectModel.hpp b/ingen/client/ObjectModel.hpp
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+/* This file is part of Ingen.
+ * Copyright 2007-2011 David Robillard <http://drobilla.net>
+ *
+ * Ingen 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.
+ *
+ * Ingen 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 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef INGEN_CLIENT_OBJECTMODEL_HPP
+#define INGEN_CLIENT_OBJECTMODEL_HPP
+
+#include <algorithm>
+#include <cassert>
+#include <cstdlib>
+
+#include "raul/Path.hpp"
+#include "raul/SharedPtr.hpp"
+#include "raul/URI.hpp"
+
+#include "ingen/GraphObject.hpp"
+#include "ingen/client/signal.hpp"
+#include "ingen/shared/ResourceImpl.hpp"
+
+namespace Ingen {
+
+namespace Shared { class URIs; }
+
+namespace Client {
+
+class ClientStore;
+
+/** Base class for all GraphObject models (NodeModel, PatchModel, PortModel).
+ *
+ * There are no non-const public methods intentionally, models are not allowed
+ * to be manipulated directly by anything (but the Store) because of the
+ * asynchronous nature of engine control.  To change something, use the
+ * controller (which the model probably shouldn't have a reference to but oh
+ * well, it reduces Collection Hell) and wait for the result (as a signal
+ * from this Model).
+ *
+ * \ingroup IngenClient
+ */
+class ObjectModel : virtual public GraphObject
+                  , public Ingen::Shared::ResourceImpl
+{
+public:
+	virtual ~ObjectModel();
+
+	bool is_a(const Raul::URI& type) const;
+
+	const Raul::Atom& get_property(const Raul::URI& key) const;
+
+	void on_property(const Raul::URI& uri, const Raul::Atom& value);
+
+	const Raul::Path&      path()       const { return _path; }
+	const Raul::Symbol&    symbol()     const { return _symbol; }
+	SharedPtr<ObjectModel> parent()     const { return _parent; }
+	bool                   polyphonic() const;
+
+	GraphObject* graph_parent() const { return _parent.get(); }
+
+	// Signals
+	INGEN_SIGNAL(new_child, void, SharedPtr<ObjectModel>);
+	INGEN_SIGNAL(removed_child, void, SharedPtr<ObjectModel>);
+	INGEN_SIGNAL(property, void, const Raul::URI&, const Raul::Atom&);
+	INGEN_SIGNAL(destroyed, void);
+	INGEN_SIGNAL(moved, void);
+
+protected:
+	friend class ClientStore;
+
+	ObjectModel(Shared::URIs& uris, const Raul::Path& path);
+	ObjectModel(const ObjectModel& copy);
+
+	virtual void set_path(const Raul::Path& p);
+	virtual void set_parent(SharedPtr<ObjectModel> p);
+	virtual void add_child(SharedPtr<ObjectModel> c) {}
+	virtual bool remove_child(SharedPtr<ObjectModel> c) { return true; }
+
+	virtual void set(SharedPtr<ObjectModel> model);
+
+	ResourceImpl           _meta;
+	SharedPtr<ObjectModel> _parent;
+
+private:
+	Raul::Path   _path;
+	Raul::Symbol _symbol;
+};
+
+} // namespace Client
+} // namespace Ingen
+
+#endif // INGEN_CLIENT_OBJECTMODEL_HPP