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2cdf0e10cSrcweir  *
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21*aaef562fSAndrew Rist 
22*aaef562fSAndrew Rist 
23cdf0e10cSrcweir 
24cdf0e10cSrcweir #ifndef INCLUDED_SLIDESHOW_PAIRANIMATION_HXX
25cdf0e10cSrcweir #define INCLUDED_SLIDESHOW_PAIRANIMATION_HXX
26cdf0e10cSrcweir 
27cdf0e10cSrcweir #include "animation.hxx"
28cdf0e10cSrcweir #include <basegfx/tuple/b2dtuple.hxx>
29cdf0e10cSrcweir 
30cdf0e10cSrcweir 
31cdf0e10cSrcweir /* Definition of PairAnimation interface */
32cdf0e10cSrcweir 
33cdf0e10cSrcweir namespace slideshow
34cdf0e10cSrcweir {
35cdf0e10cSrcweir     namespace internal
36cdf0e10cSrcweir     {
37cdf0e10cSrcweir         /** Interface defining a pair of numbers animation.
38cdf0e10cSrcweir 
39cdf0e10cSrcweir         	This interface is a specialization of the Animation
40cdf0e10cSrcweir         	interface, and is used to animate attributes representable
41cdf0e10cSrcweir         	by a pair of floating point values (e.g. a position or a
42cdf0e10cSrcweir         	size).
43cdf0e10cSrcweir          */
44cdf0e10cSrcweir         class PairAnimation : public Animation
45cdf0e10cSrcweir         {
46cdf0e10cSrcweir         public:
47cdf0e10cSrcweir             typedef ::basegfx::B2DTuple ValueType;
48cdf0e10cSrcweir 
49cdf0e10cSrcweir             /** Set the animation to the given value
50cdf0e10cSrcweir 
51cdf0e10cSrcweir                 @param rValue
52cdf0e10cSrcweir                 Current animation value.
53cdf0e10cSrcweir              */
54cdf0e10cSrcweir             virtual bool operator()( const ValueType& rValue ) = 0;
55cdf0e10cSrcweir 
56cdf0e10cSrcweir             /** Request the underlying value for this animation.
57cdf0e10cSrcweir 
58cdf0e10cSrcweir             	This is necessary for pure To or By animations, as the
59cdf0e10cSrcweir             	Activity cannot determine a sensible start value
60cdf0e10cSrcweir             	otherwise.
61cdf0e10cSrcweir 
62cdf0e10cSrcweir                 @attention Note that you are only permitted to query
63cdf0e10cSrcweir                 for the underlying value, if the animation has actually
64cdf0e10cSrcweir                 been started (via start() call).
65cdf0e10cSrcweir              */
66cdf0e10cSrcweir             virtual ValueType getUnderlyingValue() const = 0;
67cdf0e10cSrcweir         };
68cdf0e10cSrcweir 
69cdf0e10cSrcweir         typedef ::boost::shared_ptr< PairAnimation > PairAnimationSharedPtr;
70cdf0e10cSrcweir 
71cdf0e10cSrcweir     }
72cdf0e10cSrcweir }
73cdf0e10cSrcweir 
74cdf0e10cSrcweir #endif /* INCLUDED_SLIDESHOW_PAIRANIMATION_HXX */
75