68 lines
2.9 KiB
C++
68 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_SVX_E3DSCENEUPDATER_HXX
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#define INCLUDED_SVX_E3DSCENEUPDATER_HXX
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#include <svx/svxdllapi.h>
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//////////////////////////////////////////////////////////////////////////////
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// predeclarations
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class SdrObject;
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class E3dScene;
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namespace drawinglayer { namespace geometry {
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class ViewInformation3D;
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}}
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//////////////////////////////////////////////////////////////////////////////
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// This class is a helper to encapsulate 3D object changes which shall change the
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// scene's 2D geometry. E.g. when moving one 3D object in a scene, the visualisation
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// would not change since the scene's 2D attributes are defined by it's 2D object
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// transformation and the changed content would be projected to the same 2D bounds
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// as before. To reflect the fact that the 2D positions may 'change' for the user's
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// imagination, it is necessary to calculate a new 2D object transformation of the scene
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// (the SnapRect) using the old 3D transformation stack and the eventually changed
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// 3D content and tu use it. This is only wanted if changes to the scene's
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// content are intended to change the scene's 2D geometry attributes
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class SVX_DLLPUBLIC E3DModifySceneSnapRectUpdater
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{
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// the scene which may be changed. This gets set to the outmost scene
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// of the to-be-changed 3D object when the scene has a 3d transformation
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// stack at construction time. In all other cases it's set to zero and
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// no action needs to be taken
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E3dScene* mpScene;
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// the 3d transformation stack at the time of construction, valid when
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// mpScene is not zero
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drawinglayer::geometry::ViewInformation3D* mpViewInformation3D;
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public:
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// the constructor evaluates and sets the members at construction time
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E3DModifySceneSnapRectUpdater(const SdrObject* pObject);
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// the destructor will take action if mpScene is not zero and modify the
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// 2D geomeztry of the target scene
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~E3DModifySceneSnapRectUpdater();
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};
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#endif // INCLUDED_SVX_E3DSCENEUPDATER_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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