slideshow/source/engine/activities/simplecontinuousactivitybase.hxx

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  19
  20 #ifndef INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_SIMPLECONTINUOUSACTIVITYBASE_HXX
  21 #define INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_SIMPLECONTINUOUSACTIVITYBASE_HXX
  22
  23 #include "activitybase.hxx"
  24 #include <canvas/elapsedtime.hxx>
  25
  26 namespace slideshow
  27 {
  28     namespace internal
  29     {
  30         /** Simple, continuous animation.
  31
  32             This class implements a simple, continuous animation
  33             without considering repeats or acceleration on the
  34             perform call. Only useful as a base class, you
  35             probably want to use ContinuousActivityBase.
  36         */
  37         class SimpleContinuousActivityBase : public ActivityBase
  38         {
  39         public:
  40             explicit SimpleContinuousActivityBase( const ActivityParameters& rParms );
  41
  42             virtual double calcTimeLag() const override;
  43             virtual bool perform() override;
  44
  45         protected:
  46             /** Hook for derived classes
  47
  48                 This method will be called from perform().
  49
  50                 @param nSimpleTime
  51                 Simple animation time, without repeat,
  52                 acceleration or deceleration applied. This value
  53                 is always in the [0,1] range, the repeat is
  54                 accounted for with the nRepeatCount parameter.
  55
  56                 @param nRepeatCount
  57                 Number of full repeats already performed
  58             */
  59             virtual void simplePerform( double nSimpleTime, sal_uInt32 nRepeatCount ) const = 0;
  60
  61             virtual void startAnimation() override;
  62
  63         private:
  64             /// Time elapsed since activity started
  65             ::canvas::tools::ElapsedTime    maTimer;
  66
  67             /// Simple duration of activity
  68             const double                    mnMinSimpleDuration;
  69
  70             /// Minimal number of frames to show (see ActivityParameters)
  71             const sal_uInt32                mnMinNumberOfFrames;
  72
  73             /// Actual number of frames shown until now.
  74             sal_uInt32                      mnCurrPerformCalls;
  75         };
  76     }
  77 }
  78
  79 #endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_SIMPLECONTINUOUSACTIVITYBASE_HXX
  80
  81 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */