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27 
28 #ifndef INCLUDED_SLIDESHOW_DISCRETEACTIVITYBASE_HXX
29 #define INCLUDED_SLIDESHOW_DISCRETEACTIVITYBASE_HXX
30 
31 #include "activitybase.hxx"
32 #include "wakeupevent.hxx"
33 
34 #include <vector>
35 
36 
37 namespace slideshow
38 {
39     namespace internal
40     {
41         /** Specialization of ActivityBase for discrete time activities.
42 
43         	A discrete time activity is one where time proceeds in
44             discrete steps, i.e. at given time instants.
45         */
46         class DiscreteActivityBase : public ActivityBase
47         {
48         public:
49             DiscreteActivityBase( const ActivityParameters& rParms );
50 
51             /** Hook for derived classes.
52 
53 	            This method is called for each discrete time
54                 instant, with nFrame denoting the frame number
55                 (starting with 0)
56 
57                 @param nFrame
58                 Current frame number.
59 
60                 @param nRepeatCount
61                 Number of full repeats already performed
62             */
63             virtual void perform( sal_uInt32 nFrame, sal_uInt32 nRepeatCount ) const = 0;
64             virtual void dispose();
65             virtual bool perform();
66 
67         protected:
68             virtual void startAnimation();
69 
70             sal_uInt32 calcFrameIndex( sal_uInt32 		nCurrCalls,
71                                        ::std::size_t 	nVectorSize ) const;
72 
73             sal_uInt32 calcRepeatCount( sal_uInt32 		nCurrCalls,
74                                         ::std::size_t 	nVectorSize ) const;
75 
76             ::std::size_t getNumberOfKeyTimes() const { return maDiscreteTimes.size(); }
77 
78         private:
79             WakeupEventSharedPtr			mpWakeupEvent;
80             const ::std::vector< double >	maDiscreteTimes;
81             const double					mnSimpleDuration;
82             sal_uInt32						mnCurrPerformCalls;
83         };
84     }
85 }
86 
87 #endif /* INCLUDED_SLIDESHOW_DISCRETEACTIVITYBASE_HXX */
88