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#ifndef INCLUDED_SLIDESHOW_CONTINUOUSKEYTIMEACTIVITYBASE_HXX
#define INCLUDED_SLIDESHOW_CONTINUOUSKEYTIMEACTIVITYBASE_HXX

#include "simplecontinuousactivitybase.hxx"

#include <basegfx/tools/keystoplerp.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 ::basegfx::tools::KeyStopLerp maLerper;
        };
    }
}

#endif /* INCLUDED_SLIDESHOW_CONTINUOUSKEYTIMEACTIVITYBASE_HXX */