sd/source/ui/presenter/CanvasUpdateRequester.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
  21 #include "CanvasUpdateRequester.hxx"
  22 #include <vcl/svapp.hxx>
  23 #include <com/sun/star/lang/XComponent.hpp>
  24
  25 using namespace ::com::sun::star;
  26 using namespace ::com::sun::star::uno;
  27
  28 namespace sd { namespace presenter {
  29
  30 //===== CanvasUpdateRequester::Deleter ========================================
  31
  32 class CanvasUpdateRequester::Deleter
  33 {
  34 public:
  35     void operator() (CanvasUpdateRequester* pObject) { delete pObject; }
  36 };
  37
  38
  39
  40
  41 //===== CanvasUpdateRequester =================================================
  42
  43 CanvasUpdateRequester::RequesterMap CanvasUpdateRequester::maRequesterMap;
  44
  45 ::boost::shared_ptr<CanvasUpdateRequester> CanvasUpdateRequester::Instance (
  46     const Reference<rendering::XSpriteCanvas>& rxSharedCanvas)
  47 {
  48     RequesterMap::const_iterator iRequester;
  49     for (iRequester=maRequesterMap.begin(); iRequester!=maRequesterMap.end(); ++iRequester)
  50     {
  51         if (iRequester->first == rxSharedCanvas)
  52             return iRequester->second;
  53     }
  54
  55     // No requester for the given canvas found.  Create a new one.
  56     ::boost::shared_ptr<CanvasUpdateRequester> pRequester (
  57         new CanvasUpdateRequester(rxSharedCanvas), Deleter());
  58     maRequesterMap.push_back(RequesterMap::value_type(rxSharedCanvas,pRequester));
  59     return pRequester;
  60 }
  61
  62
  63
  64
  65 CanvasUpdateRequester::CanvasUpdateRequester (
  66     const Reference<rendering::XSpriteCanvas>& rxCanvas)
  67     : mxCanvas(rxCanvas),
  68       mnUserEventId(0),
  69       mbUpdateFlag(sal_False)
  70 {
  71     Reference<lang::XComponent> xComponent (mxCanvas, UNO_QUERY);
  72     if (xComponent.is())
  73     {
  74         //xComponent->addEventListener(this);
  75     }
  76 }
  77
  78
  79
  80
  81 CanvasUpdateRequester::~CanvasUpdateRequester (void)
  82 {
  83     if (mnUserEventId != 0)
  84         Application::RemoveUserEvent(mnUserEventId);
  85 }
  86
  87
  88
  89
  90 void CanvasUpdateRequester::RequestUpdate (const sal_Bool bUpdateAll)
  91 {
  92     if (mnUserEventId == 0)
  93     {
  94         mbUpdateFlag = bUpdateAll;
  95         mnUserEventId = Application::PostUserEvent(LINK(this, CanvasUpdateRequester, Callback));
  96     }
  97     else
  98     {
  99         mbUpdateFlag |= bUpdateAll;
 100     }
 101 }
 102
 103
 104
 105 IMPL_LINK_NOARG(CanvasUpdateRequester, Callback)
 106 {
 107     mnUserEventId = 0;
 108     if (mxCanvas.is())
 109     {
 110         mxCanvas->updateScreen(mbUpdateFlag);
 111         mbUpdateFlag = sal_False;
 112     }
 113     return 0;
 114 }
 115
 116
 117 } } // end of namespace ::sd::presenter
 118
 119 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */