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     if(const E3dObject* pE3dObject = dynamic_cast< const E3dObject* >(pObject))
  32     {
  33         mpScene = pE3dObject->getRootE3dSceneFromE3dObject();
  34
  35         if(nullptr != mpScene && mpScene->getRootE3dSceneFromE3dObject() == mpScene)
  36         {
  37             // if there is a scene and it's the outmost scene, get current 3D range
  38             const sdr::contact::ViewContactOfE3dScene& rVCScene = static_cast< sdr::contact::ViewContactOfE3dScene& >(mpScene->GetViewContact());
  39             const basegfx::B3DRange aAllContentRange(rVCScene.getAllContentRange3D());
  40
  41             if(aAllContentRange.isEmpty())
  42             {
  43                 // no content, nothing to do
  44                 mpScene = nullptr;
  45             }
  46             else
  47             {
  48                 // secure current 3D transformation stack
  49                 mpViewInformation3D.reset(
  50                     new drawinglayer::geometry::ViewInformation3D(
  51                         rVCScene.getViewInformation3D(aAllContentRange)));
  52             }
  53         }
  54     }
  55 }
  56
  57 E3DModifySceneSnapRectUpdater::~E3DModifySceneSnapRectUpdater()
  58 {
  59     if(mpScene && mpViewInformation3D)
  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         {
  70             // check if object transform of scene has changed
  71             if(mpViewInformation3D->getObjectTransformation() != mpScene->GetTransform())
  72             {
  73                 // If Yes, it needs to be updated since it's - for historical reasons -
  74                 // part of the basic 3d transformation stack of the scene
  75                 drawinglayer::geometry::ViewInformation3D* pNew = new drawinglayer::geometry::ViewInformation3D(
  76                     mpScene->GetTransform(), // replace object transformation with new local transform
  77                     mpViewInformation3D->getOrientation(),
  78                     mpViewInformation3D->getProjection(),
  79                     mpViewInformation3D->getDeviceToView(),
  80                     mpViewInformation3D->getViewTime(),
  81                     mpViewInformation3D->getExtendedInformationSequence());
  82                 mpViewInformation3D.reset(pNew);
  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 }
 110
 111 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */