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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef _E3D_SCENEUPDATER_HXX
+#define _E3D_SCENEUPDATER_HXX
+
+#include <svx/svxdllapi.h>
+
+//////////////////////////////////////////////////////////////////////////////
+// predeclarations
+
+class SdrObject;
+class E3dScene;
+namespace drawinglayer { namespace geometry {
+    class ViewInformation3D;
+}}
+
+//////////////////////////////////////////////////////////////////////////////
+// This class is a helper to encapsulate 3D object changes which shall change the
+// scene's 2D geometry. E.g. when moving one 3D object in a scene, the visualisation
+// would not change since the scene's 2D attributes are defined by it's 2D object
+// transformation and the changed content would be projected to the same 2D bounds
+// as before. To reflect the fact that the 2D positions may 'change' for the user's
+// imagination, it is necessary to calculate a new 2D object transformation of the scene
+// (the SnapRect) using the old 3D transformation stack and the eventually changed
+// 3D content and tu use it. This is only wanted if changes to the scene's
+// content are intended to change the scene's 2D geometry attributes
+
+class SVX_DLLPUBLIC E3DModifySceneSnapRectUpdater
+{
+    // the scene which may be changed. This gets set to the outmost scene
+    // of the to-be-changed 3D object when the scene has a 3d transformation
+    // stack at construction time. In all other cases it's set to zero and
+    // no action needs to be taken
+    E3dScene*                                   mpScene;
+
+    // the 3d transformation stack at the time of construction, valid when
+    // mpScene is not zero
+    drawinglayer::geometry::ViewInformation3D*  mpViewInformation3D;
+
+public:
+    // the constructor evaluates and sets the members at construction time
+    E3DModifySceneSnapRectUpdater(const SdrObject* pObject);
+
+    // the destructor will take action if mpScene is not zero and modify the
+    // 2D geomeztry of the target scene
+    ~E3DModifySceneSnapRectUpdater();
+};
+
+#endif          // _E3D_SCENEUPDATER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */