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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#ifndef INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_SIMPLECONTINUOUSACTIVITYBASE_HXX
#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_SIMPLECONTINUOUSACTIVITYBASE_HXX

#include "activitybase.hxx"
#include <canvas/elapsedtime.hxx>

namespace slideshow
{
    namespace internal
    {
        /** Simple, continuous animation.

            This class implements a simple, continuous animation
            without considering repeats or acceleration on the
            perform call. Only useful as a base class, you
            probably want to use ContinuousActivityBase.
        */
        class SimpleContinuousActivityBase : public ActivityBase
        {
        public:
            SimpleContinuousActivityBase( const ActivityParameters& rParms );

            virtual double calcTimeLag() const SAL_OVERRIDE;
            virtual bool perform() SAL_OVERRIDE;

        protected:
            /** Hook for derived classes

                This method will be called from perform().

                @param nSimpleTime
                Simple animation time, without repeat,
                acceleration or deceleration applied. This value
                is always in the [0,1] range, the repeat is
                accounted for with the nRepeatCount parameter.

                @param nRepeatCount
                Number of full repeats already performed
            */
            virtual void simplePerform( double nSimpleTime, sal_uInt32 nRepeatCount ) const = 0;

            virtual void startAnimation() SAL_OVERRIDE;

        private:
            /// Time elapsed since activity started
            ::canvas::tools::ElapsedTime    maTimer;

            /// Simple duration of activity
            const double                    mnMinSimpleDuration;

            /// Minimal number of frames to show (see ActivityParameters)
            const sal_uInt32                mnMinNumberOfFrames;

            /// Actual number of frames shown until now.
            sal_uInt32                      mnCurrPerformCalls;
        };
    }
}

#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_SIMPLECONTINUOUSACTIVITYBASE_HXX

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