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#ifndef INCLUDED_SD_SOURCE_UI_SLIDESORTER_INC_CONTROLLER_SLSANIMATIONFUNCTION_HXX
#define INCLUDED_SD_SOURCE_UI_SLIDESORTER_INC_CONTROLLER_SLSANIMATIONFUNCTION_HXX

#include <model/SlsSharedPageDescriptor.hxx>
#include <basegfx/point/b2dpoint.hxx>

#include <functional>
#include <vector>

namespace sd { namespace slidesorter { namespace view {
class SlideSorterView;
} } }

namespace sd { namespace slidesorter { namespace controller {

class AnimationBezierFunction
{
public:
    /** Create a cubic bezier curve whose start and end points are given
        implicitly as P0=(0,0) and P3=(1,1).  The second control point is
        implicitly given as P2=(1-nY1,1-nX1).
    */
    AnimationBezierFunction (
        const double nX1,
        const double nY1);

    ::basegfx::B2DPoint operator() (const double nT);

private:
    const double mnX1;
    const double mnY1;
    const double mnX2;
    const double mnY2;

    static double EvaluateComponent (
        const double nT,
        const double nV1,
        const double nV2);
};

/** Turn a parametric function into one whose y-Values depend on its
    x-Values.  Note a lot of interpolation takes place.  The resulting
    accuracy should be good enough for the purpose of acceleration
    function for animations.
*/
class AnimationParametricFunction
{
public:
    typedef ::std::function<basegfx::B2DPoint (double)> ParametricFunction;
    AnimationParametricFunction (const ParametricFunction& rFunction);

    double operator() (const double nX);

private:
    /** y-Values of the parametric function given to the constructor
        evaluated (and interpolated) for evenly spaced x-Values.
    */
    ::std::vector<double> maY;
};

} } } // end of namespace ::sd::slidesorter::controller

#endif

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