sd/source/ui/accessibility/AccessibleViewForwarder.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 "AccessibleViewForwarder.hxx"
  21 #include <svx/svdpntv.hxx>
  22 #include <vcl/outdev.hxx>
  23 #include <svx/sdrpaintwindow.hxx>
  24
  25 namespace accessibility {
  26
  27 /** For the time being, the implementation of this class will not use the
  28     member mrDevice.  Instead the device is retrieved from the view
  29     every time it is used.  This is necessary because the device has to stay
  30     up-to-date with the current view and the class has to stay compatible.
  31     May change in the future.
  32 */
  33
  34 AccessibleViewForwarder::AccessibleViewForwarder (SdrPaintView* pView, OutputDevice& rDevice)
  35     : mpView (pView),
  36       mnWindowId (0),
  37       mrDevice (rDevice)
  38 {
  39     // Search the output device to determine its id.
  40     for(sal_uInt32 a(0L); a < mpView->PaintWindowCount(); a++)
  41     {
  42         SdrPaintWindow* pPaintWindow = mpView->GetPaintWindow(a);
  43         OutputDevice& rOutDev = pPaintWindow->GetOutputDevice();
  44
  45         if(&rOutDev == &rDevice)
  46         {
  47             mnWindowId = (sal_uInt16)a;
  48             break;
  49         }
  50     }
  51 }
  52
  53 AccessibleViewForwarder::~AccessibleViewForwarder()
  54 {
  55     // empty
  56 }
  57
  58 bool AccessibleViewForwarder::IsValid() const
  59 {
  60     return true;
  61 }
  62
  63 Rectangle AccessibleViewForwarder::GetVisibleArea() const
  64 {
  65     Rectangle aVisibleArea;
  66
  67     if((sal_uInt32)mnWindowId < mpView->PaintWindowCount())
  68     {
  69         SdrPaintWindow* pPaintWindow = mpView->GetPaintWindow((sal_uInt32)mnWindowId);
  70         aVisibleArea = pPaintWindow->GetVisibleArea();
  71     }
  72
  73     return aVisibleArea;
  74 }
  75
  76 /** Tansform the given point into pixel coordiantes.  After the pixel
  77     coordiantes of the window origin are added to make the point coordinates
  78     absolute.
  79 */
  80 Point AccessibleViewForwarder::LogicToPixel (const Point& rPoint) const
  81 {
  82     OSL_ASSERT (mpView != NULL);
  83     if((sal_uInt32)mnWindowId < mpView->PaintWindowCount())
  84     {
  85         SdrPaintWindow* pPaintWindow = mpView->GetPaintWindow((sal_uInt32)mnWindowId);
  86         OutputDevice& rOutDev = pPaintWindow->GetOutputDevice();
  87         Rectangle aBBox(static_cast<vcl::Window&>(rOutDev).GetWindowExtentsRelative(0L));
  88         return rOutDev.LogicToPixel (rPoint) + aBBox.TopLeft();
  89     }
  90     else
  91         return Point();
  92 }
  93
  94 Size AccessibleViewForwarder::LogicToPixel (const Size& rSize) const
  95 {
  96     OSL_ASSERT (mpView != NULL);
  97     if((sal_uInt32)mnWindowId < mpView->PaintWindowCount())
  98     {
  99         SdrPaintWindow* pPaintWindow = mpView->GetPaintWindow((sal_uInt32)mnWindowId);
 100         OutputDevice& rOutDev = pPaintWindow->GetOutputDevice();
 101         return rOutDev.LogicToPixel (rSize);
 102     }
 103     else
 104         return Size();
 105 }
 106
 107 /** First subtract the window origin to make the point coordinates relative
 108     to the window and then transform them into internal coordinates.
 109 */
 110 Point AccessibleViewForwarder::PixelToLogic (const Point& rPoint) const
 111 {
 112     OSL_ASSERT (mpView != NULL);
 113     if((sal_uInt32)mnWindowId < mpView->PaintWindowCount())
 114     {
 115         SdrPaintWindow* pPaintWindow = mpView->GetPaintWindow((sal_uInt32)mnWindowId);
 116         OutputDevice& rOutDev = pPaintWindow->GetOutputDevice();
 117         Rectangle aBBox (static_cast<vcl::Window&>(rOutDev).GetWindowExtentsRelative(0L));
 118         return rOutDev.PixelToLogic (rPoint - aBBox.TopLeft());
 119     }
 120     else
 121         return Point();
 122 }
 123
 124 Size AccessibleViewForwarder::PixelToLogic (const Size& rSize) const
 125 {
 126     OSL_ASSERT (mpView != NULL);
 127     if((sal_uInt32)mnWindowId < mpView->PaintWindowCount())
 128     {
 129         SdrPaintWindow* pPaintWindow = mpView->GetPaintWindow((sal_uInt32)mnWindowId);
 130         OutputDevice& rOutDev = pPaintWindow->GetOutputDevice();
 131         return rOutDev.PixelToLogic (rSize);
 132     }
 133     else
 134         return Size();
 135 }
 136
 137 } // end of namespace accessibility
 138
 139 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */