sd/source/ui/presenter/CanvasUpdateRequester.cxx

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  31
  32 #include "precompiled_sd.hxx"
  33
  34 #include "CanvasUpdateRequester.hxx"
  35 #include <vcl/svapp.hxx>
  36 #include <com/sun/star/lang/XComponent.hpp>
  37
  38 using namespace ::com::sun::star;
  39 using namespace ::com::sun::star::uno;
  40 using ::rtl::OUString;
  41
  42 namespace sd { namespace presenter {
  43
  44 //===== CanvasUpdateRequester::Deleter ========================================
  45
  46 class CanvasUpdateRequester::Deleter
  47 {
  48 public:
  49     void operator() (CanvasUpdateRequester* pObject) { delete pObject; }
  50 };
  51
  52
  53
  54
  55 //===== CanvasUpdateRequester =================================================
  56
  57 CanvasUpdateRequester::RequesterMap CanvasUpdateRequester::maRequesterMap;
  58
  59 ::boost::shared_ptr<CanvasUpdateRequester> CanvasUpdateRequester::Instance (
  60     const Reference<rendering::XSpriteCanvas>& rxSharedCanvas)
  61 {
  62     RequesterMap::const_iterator iRequester;
  63     for (iRequester=maRequesterMap.begin(); iRequester!=maRequesterMap.end(); ++iRequester)
  64     {
  65         if (iRequester->first == rxSharedCanvas)
  66             return iRequester->second;
  67     }
  68
  69     // No requester for the given canvas found.  Create a new one.
  70     ::boost::shared_ptr<CanvasUpdateRequester> pRequester (
  71         new CanvasUpdateRequester(rxSharedCanvas), Deleter());
  72     maRequesterMap.push_back(RequesterMap::value_type(rxSharedCanvas,pRequester));
  73     return pRequester;
  74 }
  75
  76
  77
  78
  79 CanvasUpdateRequester::CanvasUpdateRequester (
  80     const Reference<rendering::XSpriteCanvas>& rxCanvas)
  81     : mxCanvas(rxCanvas),
  82       mnUserEventId(0),
  83       mbUpdateFlag(sal_False)
  84 {
  85     Reference<lang::XComponent> xComponent (mxCanvas, UNO_QUERY);
  86     if (xComponent.is())
  87     {
  88         //xComponent->addEventListener(this);
  89     }
  90 }
  91
  92
  93
  94
  95 CanvasUpdateRequester::~CanvasUpdateRequester (void)
  96 {
  97     if (mnUserEventId != 0)
  98         Application::RemoveUserEvent(mnUserEventId);
  99 }
 100
 101
 102
 103
 104 void CanvasUpdateRequester::RequestUpdate (const sal_Bool bUpdateAll)
 105 {
 106     if (mnUserEventId == 0)
 107     {
 108         mbUpdateFlag = bUpdateAll;
 109         mnUserEventId = Application::PostUserEvent(LINK(this, CanvasUpdateRequester, Callback));
 110     }
 111     else
 112     {
 113         mbUpdateFlag |= bUpdateAll;
 114     }
 115 }
 116
 117
 118
 119 IMPL_LINK(CanvasUpdateRequester, Callback, void*, EMPTYARG)
 120 {
 121     mnUserEventId = 0;
 122     if (mxCanvas.is())
 123     {
 124         mxCanvas->updateScreen(mbUpdateFlag);
 125         mbUpdateFlag = sal_False;
 126     }
 127     return 0;
 128 }
 129
 130
 131 } } // end of namespace ::sd::presenter