--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/mobility/mobility-model-notifier.h	Mon Jul 23 15:53:54 2007 +0200
@@ -0,0 +1,72 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2007 INRIA
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
+ */
+#ifndef MOBILITY_MODEL_NOTIFIER_H
+#define MOBILITY_MODEL_NOTIFIER_H
+
+#include "ns3/object.h"
+#include "ns3/component-manager.h"
+#include "ns3/callback.h"
+#include "mobility-model.h"
+
+namespace ns3 {
+
+/**
+ * \brief notify listeners of position changes.
+ */
+class MobilityModelNotifier : public Object
+{
+public:
+  static const InterfaceId iid;
+  static const ClassId cid;
+
+  typedef Callback<void,Ptr<const MobilityModel> > Listener;
+
+  /**
+   * Create a new position notifier
+   */
+  MobilityModelNotifier ();
+
+  /**
+   * \param position the position which just changed.
+   */
+  void Notify (Ptr<const MobilityModel> position) const;
+
+  /**
+   * \param listener listener to add
+   *
+   * The listener will be notified upon every position change.
+   */
+  void RegisterListener (Listener listener);
+  /**
+   * \param listener listener to remove
+   *
+   * The listener will not be notified anymore upon every 
+   * position change. It is not an error to try to unregister
+   * a non-registered liste
+   */
+  void UnregisterListener (Listener listener);
+private:
+  std::list<Listener> m_listeners;
+};
+
+} // namespace ns3
+
+#endif /* MOBILITY_MODEL_NOTIFIER_H */