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27*cdf0e10cSrcweir 
28*cdf0e10cSrcweir #include "precompiled_sd.hxx"
29*cdf0e10cSrcweir 
30*cdf0e10cSrcweir #include "slideshow.hxx"
31*cdf0e10cSrcweir #include "ViewShellBase.hxx"
32*cdf0e10cSrcweir #include <rtl/ref.hxx>
33*cdf0e10cSrcweir #include <tools/link.hxx>
34*cdf0e10cSrcweir #include <boost/enable_shared_from_this.hpp>
35*cdf0e10cSrcweir 
36*cdf0e10cSrcweir namespace sd {
37*cdf0e10cSrcweir 
38*cdf0e10cSrcweir /** This class is used when a display is removed or added to restart the
39*cdf0e10cSrcweir     slide show.  This is necessary at least with DirectX because
40*cdf0e10cSrcweir     deactivating a display invalidates DirectX resources.  Accessing those
41*cdf0e10cSrcweir     leads to a crash.
42*cdf0e10cSrcweir 
43*cdf0e10cSrcweir     During a restart a possibly installed presenter extension is given the
44*cdf0e10cSrcweir     oportunity to show or hide depending on the number of available displays.
45*cdf0e10cSrcweir */
46*cdf0e10cSrcweir class SlideShowRestarter
47*cdf0e10cSrcweir     : public boost::enable_shared_from_this<SlideShowRestarter>
48*cdf0e10cSrcweir {
49*cdf0e10cSrcweir public:
50*cdf0e10cSrcweir     /** Create a new SlideShowRestarter object.
51*cdf0e10cSrcweir         @param rpSlideShow
52*cdf0e10cSrcweir             The slide show is used to determine the current slide, which is
53*cdf0e10cSrcweir             restored after the restart, and of course to stop and start the
54*cdf0e10cSrcweir             slide show.
55*cdf0e10cSrcweir         @param pViewShellBase
56*cdf0e10cSrcweir             Used to get access to a slot dispatcher.
57*cdf0e10cSrcweir     */
58*cdf0e10cSrcweir     SlideShowRestarter (
59*cdf0e10cSrcweir         const ::rtl::Reference<SlideShow>& rpSlideShow,
60*cdf0e10cSrcweir         ViewShellBase* pViewShellBase);
61*cdf0e10cSrcweir     virtual ~SlideShowRestarter (void);
62*cdf0e10cSrcweir 
63*cdf0e10cSrcweir     /** Restarting the slide show is an asynchronous multi step process
64*cdf0e10cSrcweir         which is started by calling this method.
65*cdf0e10cSrcweir     */
66*cdf0e10cSrcweir     void Restart (void);
67*cdf0e10cSrcweir 
68*cdf0e10cSrcweir private:
69*cdf0e10cSrcweir     sal_Int32 mnEventId;
70*cdf0e10cSrcweir     ::rtl::Reference<SlideShow> mpSlideShow;
71*cdf0e10cSrcweir     ViewShellBase* mpViewShellBase;
72*cdf0e10cSrcweir     ::boost::shared_ptr<SlideShowRestarter> mpSelf;
73*cdf0e10cSrcweir     sal_Int32 mnDisplayCount;
74*cdf0e10cSrcweir     SfxDispatcher* mpDispatcher;
75*cdf0e10cSrcweir     sal_Int32 mnCurrentSlideNumber;
76*cdf0e10cSrcweir 
77*cdf0e10cSrcweir     /** The display count is used to determine whether the number of
78*cdf0e10cSrcweir         displays has changed and thus whether restarting the slide show is
79*cdf0e10cSrcweir         really necessary.
80*cdf0e10cSrcweir     */
81*cdf0e10cSrcweir     sal_Int32 GetDisplayCount (void);
82*cdf0e10cSrcweir 
83*cdf0e10cSrcweir     DECL_LINK(EndPresentation, void*);
84*cdf0e10cSrcweir 
85*cdf0e10cSrcweir     /** Restart the presentation on the slide last shown before the restart
86*cdf0e10cSrcweir         was initiated.
87*cdf0e10cSrcweir     */
88*cdf0e10cSrcweir     void StartPresentation (void);
89*cdf0e10cSrcweir };
90*cdf0e10cSrcweir 
91*cdf0e10cSrcweir } // end of namespace sd
92