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20 #ifndef INCLUDED_SLIDESHOW_SOURCE_INC_HSLCOLORANIMATION_HXX
21 #define INCLUDED_SLIDESHOW_SOURCE_INC_HSLCOLORANIMATION_HXX
23 #include "animation.hxx"
24 #include "hslcolor.hxx"
27 /* Definition of HSLColorAnimation interface */
33 /** Interface defining a HSL color animation.
35 This interface is a specialization of the Animation
36 interface, and is used to animate attributes representable
39 class HSLColorAnimation
: public Animation
42 typedef HSLColor ValueType
;
44 /** Set the animation to the given color value
47 Current animation value.
49 virtual bool operator()( const ValueType
& rColor
) = 0;
51 /** Request the underlying value for this animation.
53 This is necessary for pure To or By animations, as the
54 Activity cannot determine a sensible start value
57 @attention Note that you are only permitted to query
58 for the underlying value, if the animation has actually
59 been started (via start() call).
61 virtual ValueType
getUnderlyingValue() const = 0;
64 typedef ::boost::shared_ptr
< HSLColorAnimation
> HSLColorAnimationSharedPtr
;
69 #endif // INCLUDED_SLIDESHOW_SOURCE_INC_HSLCOLORANIMATION_HXX
71 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */