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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 _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: */
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