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diff --git a/libs/glibmm2/glibmm/propertyproxy_base.h b/libs/glibmm2/glibmm/propertyproxy_base.h
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+++ b/libs/glibmm2/glibmm/propertyproxy_base.h
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+// -*- c++ -*-
+#ifndef _GLIBMM_PROPERTYPROXY_BASE_H
+#define _GLIBMM_PROPERTYPROXY_BASE_H
+/* $Id$ */
+
+/* propertyproxy_base.h
+ *
+ * Copyright 2002 The gtkmm Development Team
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <glibmm/value.h>
+#include <glibmm/signalproxy.h>
+
+
+namespace Glib
+{
+
+class ObjectBase;
+
+/// Use the connect() method, with sigc::ptr_fun() or sig::mem_fun() to connect signals to signal handlers.
+class SignalProxyProperty : public SignalProxyBase
+{
+public:
+  friend class PropertyProxy_Base;
+
+  SignalProxyProperty(Glib::ObjectBase* obj, const gchar* property_name);
+  ~SignalProxyProperty();
+
+  typedef sigc::slot<void> SlotType;
+  sigc::connection connect(const SlotType& sl);
+
+protected:
+  static void callback(GObject* object, GParamSpec* pspec, gpointer data);
+
+  const char* property_name_; //Should be a static string literal.
+
+private:
+  SignalProxyProperty& operator=(const SignalProxyProperty&); // not implemented
+};
+
+
+class PropertyProxy_Base
+{
+public:
+  PropertyProxy_Base(ObjectBase* obj, const char* property_name);
+  PropertyProxy_Base(const PropertyProxy_Base& other);
+
+  ///This signal will be emitted when the property changes.
+  SignalProxyProperty signal_changed();
+
+  ObjectBase* get_object()   const { return obj_; }
+  const char* get_name() const { return property_name_; }
+
+protected:
+  void set_property_(const Glib::ValueBase& value);
+  void get_property_(Glib::ValueBase& value) const;
+  void reset_property_();
+
+  ObjectBase* obj_; //The C++ wrapper instance of which this PropertyProxy is a member.
+  const char* property_name_; //Should be a static string literal.
+
+private:
+  //Declared as private, but not implemented to prevent any automatically generated implementation.
+  PropertyProxy_Base& operator=(const PropertyProxy_Base&);
+};
+
+} // namespace Glib
+
+#endif /* _GLIBMM_PROPERTYPROXY_BASE_H */
+