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#ifndef INCLUDED_SLIDESHOW_CONTINUOUSKEYTIMEACTIVITYBASE_HXX
#define INCLUDED_SLIDESHOW_CONTINUOUSKEYTIMEACTIVITYBASE_HXX

#include "simplecontinuousactivitybase.hxx"
#include <vector>


namespace slideshow
{
    namespace internal
    {
        /** Interpolated, key-times animation.

            This class implements an interpolated key-times
            animation, with continuous time.
        */
        class ContinuousKeyTimeActivityBase : public SimpleContinuousActivityBase
        {
        public:
            ContinuousKeyTimeActivityBase( const ActivityParameters& rParms );

            using SimpleContinuousActivityBase::perform;

            /** Hook for derived classes

                This method will be called from perform(), already
                equipped with the modified time (nMinNumberOfFrames, repeat,
                acceleration and deceleration taken into account).

                @param nIndex
                Current index of the key times/key values.

                @param nFractionalIndex
                Fractional value from the [0,1] range, specifying
                the position between nIndex and nIndex+1.

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

            /// From SimpleContinuousActivityBase class
            virtual void simplePerform( double      nSimpleTime,
                                        sal_uInt32  nRepeatCount ) const;

        private:
            const ::std::vector< double >   maKeyTimes;

            /// last active index in maKeyTimes (to avoid frequent searching)
            mutable ::std::size_t           mnLastIndex;
        };
    }
}

#endif /* INCLUDED_SLIDESHOW_CONTINUOUSKEYTIMEACTIVITYBASE_HXX */