sd/source/ui/slideshow/SlideShowRestarter.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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   9  * This file incorporates work covered by the following license notice:
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  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
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  19
  20 #ifndef INCLUDED_SD_SOURCE_UI_SLIDESHOW_SLIDESHOWRESTARTER_HXX
  21 #define INCLUDED_SD_SOURCE_UI_SLIDESHOW_SLIDESHOWRESTARTER_HXX
  22
  23 #include <rtl/ref.hxx>
  24 #include <tools/link.hxx>
  25 #include <memory>
  26
  27 namespace sd { class SlideShow; }
  28 namespace sd { class ViewShellBase; }
  29 class SfxDispatcher;
  30 struct ImplSVEvent;
  31
  32 namespace sd {
  33
  34 /** This class is used when a display is removed or added to restart the
  35     slide show.  This is necessary at least with DirectX because
  36     deactivating a display invalidates DirectX resources.  Accessing those
  37     leads to a crash.
  38
  39     During a restart a possibly installed presenter extension is given the
  40     opportunity to show or hide depending on the number of available displays.
  41 */
  42 class SlideShowRestarter
  43     : public std::enable_shared_from_this<SlideShowRestarter>
  44 {
  45 public:
  46     /** Create a new SlideShowRestarter object.
  47         @param rpSlideShow
  48             The slide show is used to determine the current slide, which is
  49             restored after the restart, and of course to stop and start the
  50             slide show.
  51         @param pViewShellBase
  52             Used to get access to a slot dispatcher.
  53     */
  54     SlideShowRestarter (
  55         const ::rtl::Reference<SlideShow>& rpSlideShow,
  56         ViewShellBase* pViewShellBase);
  57     virtual ~SlideShowRestarter();
  58
  59     /** Restarting the slide show is an asynchronous multi step process
  60         which is started by calling this method.
  61         @param bForce
  62            Used to force a re-start, even if the display count is unchanged.
  63     */
  64     void Restart (bool bForce);
  65
  66 private:
  67     ImplSVEvent * mnEventId;
  68     ::rtl::Reference<SlideShow> mpSlideShow;
  69     ViewShellBase* mpViewShellBase;
  70     ::std::shared_ptr<SlideShowRestarter> mpSelf;
  71     sal_Int32 mnDisplayCount;
  72     SfxDispatcher* mpDispatcher;
  73     sal_Int32 mnCurrentSlideNumber;
  74
  75     DECL_LINK(EndPresentation, void*, void);
  76
  77     /** Restart the presentation on the slide last shown before the restart
  78         was initiated.
  79     */
  80     void StartPresentation();
  81 };
  82
  83 } // end of namespace sd
  84
  85 #endif // INCLUDED_SD_SOURCE_UI_SLIDESHOW_SLIDESHOWRESTARTER_HXX
  86
  87 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */