svx/source/engine3d/e3dsceneupdater.cxx

   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 #include <svx/e3dsceneupdater.hxx>
  21 #include <drawinglayer/geometry/viewinformation3d.hxx>
  22 #include <svx/obj3d.hxx>
  23 #include <svx/scene3d.hxx>
  24 #include <svx/sdr/contact/viewcontactofe3dscene.hxx>
  25
  26
  27 E3DModifySceneSnapRectUpdater::E3DModifySceneSnapRectUpdater(const SdrObject* pObject)
  28 :   mpScene(nullptr)
  29 {
  30     // Secure old 3D transformation stack before modification
  31     const E3dObject* pE3dObject = DynCastE3dObject(pObject);
  32     if(!pE3dObject)
  33         return;
  34
  35     mpScene = pE3dObject->getRootE3dSceneFromE3dObject();
  36
  37     if(nullptr == mpScene || mpScene->getRootE3dSceneFromE3dObject() != mpScene)
  38         return;
  39
  40     // if there is a scene and it's the outmost scene, get current 3D range
  41     const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(mpScene->GetViewContact());
  42     const basegfx::B3DRange aAllContentRange(rVCScene.getAllContentRange3D());
  43
  44     if(aAllContentRange.isEmpty())
  45     {
  46         // no content, nothing to do
  47         mpScene = nullptr;
  48     }
  49     else
  50     {
  51         // secure current 3D transformation stack
  52         mpViewInformation3D = rVCScene.getViewInformation3D(aAllContentRange);
  53     }
  54 }
  55
  56 E3DModifySceneSnapRectUpdater::~E3DModifySceneSnapRectUpdater()
  57 {
  58     if(!(mpScene && mpViewInformation3D))
  59         return;
  60
  61     // after changing parts of the scene, use the secured last 3d transformation stack and the new content
  62     // range to calculate a new, eventually expanded or shrunk, 2D geometry for the scene and apply it.
  63     // Get new content range
  64     const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(mpScene->GetViewContact());
  65     basegfx::B3DRange aAllContentRange(rVCScene.getAllContentRange3D());
  66
  67     // only change when there is still content; else let scene stay at old SnapRect
  68     if(aAllContentRange.isEmpty())
  69         return;
  70
  71     // check if object transform of scene has changed
  72     if(mpViewInformation3D->getObjectTransformation() != mpScene->GetTransform())
  73     {
  74         // If Yes, it needs to be updated since it's - for historical reasons -
  75         // part of the basic 3d transformation stack of the scene
  76         mpViewInformation3D = drawinglayer::geometry::ViewInformation3D(
  77             mpScene->GetTransform(), // replace object transformation with new local transform
  78             mpViewInformation3D->getOrientation(),
  79             mpViewInformation3D->getProjection(),
  80             mpViewInformation3D->getDeviceToView(),
  81             mpViewInformation3D->getViewTime(),
  82             mpViewInformation3D->getExtendedInformationSequence());
  83     }
  84
  85     // transform content range to scene-relative coordinates using old 3d transformation stack
  86     aAllContentRange.transform(mpViewInformation3D->getObjectToView());
  87
  88     // build 2d relative content range
  89     basegfx::B2DRange aSnapRange(
  90         aAllContentRange.getMinX(), aAllContentRange.getMinY(),
  91         aAllContentRange.getMaxX(), aAllContentRange.getMaxY());
  92
  93     // transform to 2D world coordinates using scene's 2D transformation
  94     aSnapRange.transform(rVCScene.getObjectTransformation());
  95
  96     // snap to (old) integer
  97     const tools::Rectangle aNewSnapRect(
  98         sal_Int32(floor(aSnapRange.getMinX())), sal_Int32(floor(aSnapRange.getMinY())),
  99         sal_Int32(ceil(aSnapRange.getMaxX())), sal_Int32(ceil(aSnapRange.getMaxY())));
 100
 101     // set as new SnapRect and invalidate bound volume
 102     if(mpScene->GetSnapRect() != aNewSnapRect)
 103     {
 104         mpScene->SetSnapRect(aNewSnapRect);
 105         mpScene->InvalidateBoundVolume();
 106     }
 107 }
 108
 109 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */