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21 
22 
23 
24 #ifndef INCLUDED_SLIDESHOW_DISCRETEACTIVITYBASE_HXX
25 #define INCLUDED_SLIDESHOW_DISCRETEACTIVITYBASE_HXX
26 
27 #include "activitybase.hxx"
28 #include "wakeupevent.hxx"
29 
30 #include <vector>
31 
32 
33 namespace slideshow
34 {
35     namespace internal
36     {
37         /** Specialization of ActivityBase for discrete time activities.
38 
39         	A discrete time activity is one where time proceeds in
40             discrete steps, i.e. at given time instants.
41         */
42         class DiscreteActivityBase : public ActivityBase
43         {
44         public:
45             DiscreteActivityBase( const ActivityParameters& rParms );
46 
47             /** Hook for derived classes.
48 
49 	            This method is called for each discrete time
50                 instant, with nFrame denoting the frame number
51                 (starting with 0)
52 
53                 @param nFrame
54                 Current frame number.
55 
56                 @param nRepeatCount
57                 Number of full repeats already performed
58             */
59             virtual void perform( sal_uInt32 nFrame, sal_uInt32 nRepeatCount ) const = 0;
60             virtual void dispose();
61             virtual bool perform();
62 
63         protected:
64             virtual void startAnimation();
65 
66             sal_uInt32 calcFrameIndex( sal_uInt32 		nCurrCalls,
67                                        ::std::size_t 	nVectorSize ) const;
68 
69             sal_uInt32 calcRepeatCount( sal_uInt32 		nCurrCalls,
70                                         ::std::size_t 	nVectorSize ) const;
71 
getNumberOfKeyTimes() const72             ::std::size_t getNumberOfKeyTimes() const { return maDiscreteTimes.size(); }
73 
74         private:
75             WakeupEventSharedPtr			mpWakeupEvent;
76             const ::std::vector< double >	maDiscreteTimes;
77             const double					mnSimpleDuration;
78             sal_uInt32						mnCurrPerformCalls;
79         };
80     }
81 }
82 
83 #endif /* INCLUDED_SLIDESHOW_DISCRETEACTIVITYBASE_HXX */
84