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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_E3DSCENEUPDATER_HXX
#define INCLUDED_SVX_E3DSCENEUPDATER_HXX
#include <svx/svxdllapi.h>
#include <drawinglayer/geometry/viewinformation3d.hxx>
#include <optional>
class SdrObject;
class E3dScene;
/** Helper for 3d object changes affecting 2d geometry
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 its 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 possibly modified 3D content and to
use it. This is only desirable if changes to the scene's content
are intended to change the scene's 2D geometry attributes
*/
class SVXCORE_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
std::optional<drawinglayer::geometry::ViewInformation3D> mpViewInformation3D;
public:
// the constructor evaluates and sets the members at construction time
E3DModifySceneSnapRectUpdater(const SdrObject* mpObject);
// the destructor will take action if mpScene is not zero and modify the
// 2D geometry of the target scene
~E3DModifySceneSnapRectUpdater();
};
#endif // INCLUDED_SVX_E3DSCENEUPDATER_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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