1 files changed, 51 insertions, 0 deletions
diff --git a/include/svx/sdrobjectuser.hxx b/include/svx/sdrobjectuser.hxx
new file mode 100644
index 0000000000..f13beeb426
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+++ b/include/svx/sdrobjectuser.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SVX_SDROBJECTUSER_HXX
+#define INCLUDED_SVX_SDROBJECTUSER_HXX
+
+#include <vector>
+
+class SdrObject;
+
+// To make things more safe, allow users of an object to register at it. The users need to be derived
+// from sdr::ObjectUser to get a call. The users do not need to call RemoveObjectUser() at the page
+// when they get called from ObjectInDestruction().
+
+namespace sdr
+{
+    class ObjectUser
+    {
+    public:
+        // this method is called from the destructor of the referenced page.
+        // do all necessary action to forget the page. It is not necessary to call
+        // RemovePageUser(), that is done from the destructor.
+        virtual void ObjectInDestruction(const SdrObject& rObject) = 0;
+
+    protected:
+        ~ObjectUser() {}
+    };
+
+    // typedef for ObjectUserVector
+    typedef ::std::vector< ObjectUser* > ObjectUserVector;
+} // end of namespace sdr
+
+#endif // INCLUDED_SVX_SDROBJECTUSER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */