1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ 2 /* 3 * This file is part of the LibreOffice project. 4 * 5 * This Source Code Form is subject to the terms of the Mozilla Public 6 * License, v. 2.0. If a copy of the MPL was not distributed with this 7 * file, You can obtain one at http://mozilla.org/MPL/2.0/. 8 * 9 * This file incorporates work covered by the following license notice: 10 * 11 * Licensed to the Apache Software Foundation (ASF) under one or more 12 * contributor license agreements. See the NOTICE file distributed 13 * with this work for additional information regarding copyright 14 * ownership. The ASF licenses this file to you under the Apache 15 * License, Version 2.0 (the "License"); you may not use this file 16 * except in compliance with the License. You may obtain a copy of 17 * the License at http://www.apache.org/licenses/LICENSE-2.0 . 18 */ 19 20 #ifndef INCLUDED_SVX_E3DSCENEUPDATER_HXX 21 #define INCLUDED_SVX_E3DSCENEUPDATER_HXX 22 23 #include <svx/svxdllapi.h> 24 #include <memory> 25 26 class SdrObject; 27 class E3dScene; 28 29 namespace drawinglayer { namespace geometry { 30 class ViewInformation3D; 31 }} 32 33 /** Helper for 3d object changes affecting 2d geometry 34 35 This class is a helper to encapsulate 3D object changes which shall 36 change the scene's 2D geometry. E.g. when moving one 3D object in a 37 scene, the visualisation would not change since the scene's 2D 38 attributes are defined by its 2D object transformation and the 39 changed content would be projected to the same 2D bounds as 40 before. To reflect the fact that the 2D positions may 'change' for 41 the user's imagination, it is necessary to calculate a new 2D 42 object transformation of the scene (the SnapRect) using the old 3D 43 transformation stack and the possibly modified 3D content and to 44 use it. This is only desirable if changes to the scene's content 45 are intended to change the scene's 2D geometry attributes 46 */ 47 class SVX_DLLPUBLIC E3DModifySceneSnapRectUpdater 48 { 49 // the scene which may be changed. This gets set to the outmost scene 50 // of the to-be-changed 3D object when the scene has a 3d transformation 51 // stack at construction time. In all other cases it's set to zero and 52 // no action needs to be taken 53 E3dScene* mpScene; 54 55 // the 3d transformation stack at the time of construction, valid when 56 // mpScene is not zero 57 std::unique_ptr<drawinglayer::geometry::ViewInformation3D> mpViewInformation3D; 58 59 public: 60 // the constructor evaluates and sets the members at construction time 61 E3DModifySceneSnapRectUpdater(const SdrObject* mpObject); 62 63 // the destructor will take action if mpScene is not zero and modify the 64 // 2D geometry of the target scene 65 ~E3DModifySceneSnapRectUpdater(); 66 }; 67 68 #endif // INCLUDED_SVX_E3DSCENEUPDATER_HXX 69 70 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ 71