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