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27*cdf0e10cSrcweir 
28*cdf0e10cSrcweir #ifndef INCLUDED_SLIDESHOW_ANIMATIONFUNCTION_HXX
29*cdf0e10cSrcweir #define INCLUDED_SLIDESHOW_ANIMATIONFUNCTION_HXX
30*cdf0e10cSrcweir 
31*cdf0e10cSrcweir #include <sal/config.h>
32*cdf0e10cSrcweir #include <boost/shared_ptr.hpp>
33*cdf0e10cSrcweir 
34*cdf0e10cSrcweir 
35*cdf0e10cSrcweir /* Definition of AnimationFunction interface */
36*cdf0e10cSrcweir 
37*cdf0e10cSrcweir namespace slideshow
38*cdf0e10cSrcweir {
39*cdf0e10cSrcweir     namespace internal
40*cdf0e10cSrcweir     {
41*cdf0e10cSrcweir         /** Interface describing an abstract animation function.
42*cdf0e10cSrcweir 
43*cdf0e10cSrcweir         	Use this interface to model time-dependent animation
44*cdf0e10cSrcweir         	functions of one variable.
45*cdf0e10cSrcweir          */
46*cdf0e10cSrcweir         class AnimationFunction
47*cdf0e10cSrcweir         {
48*cdf0e10cSrcweir         public:
49*cdf0e10cSrcweir             virtual ~AnimationFunction() {}
50*cdf0e10cSrcweir 
51*cdf0e10cSrcweir             /** Operator to calculate function value.
52*cdf0e10cSrcweir 
53*cdf0e10cSrcweir             	This method calculates the function value for the
54*cdf0e10cSrcweir             	given time instant t.
55*cdf0e10cSrcweir 
56*cdf0e10cSrcweir                 @param t
57*cdf0e10cSrcweir                 Current time instant, must be in the range [0,1]
58*cdf0e10cSrcweir 
59*cdf0e10cSrcweir                 @return the function value, typically in relative
60*cdf0e10cSrcweir                 user coordinate space ([0,1] range).
61*cdf0e10cSrcweir              */
62*cdf0e10cSrcweir             virtual double operator()( double t ) const = 0;
63*cdf0e10cSrcweir 
64*cdf0e10cSrcweir         };
65*cdf0e10cSrcweir 
66*cdf0e10cSrcweir         typedef ::boost::shared_ptr< AnimationFunction > AnimationFunctionSharedPtr;
67*cdf0e10cSrcweir 
68*cdf0e10cSrcweir     }
69*cdf0e10cSrcweir }
70*cdf0e10cSrcweir 
71*cdf0e10cSrcweir #endif /* INCLUDED_SLIDESHOW_ANIMATIONFUNCTION_HXX */
72