slideshow/source/inc/coloranimation.hxx

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  30
  31 #ifndef INCLUDED_SLIDESHOW_COLORANIMATION_HXX
  32 #define INCLUDED_SLIDESHOW_COLORANIMATION_HXX
  33
  34 #include "animation.hxx"
  35 #include "rgbcolor.hxx"
  36
  37
  38 /* Definition of ColorAnimation interface */
  39
  40 namespace slideshow
  41 {
  42     namespace internal
  43     {
  44         /** Interface defining a color animation.
  45
  46             This interface is a specialization of the Animation
  47             interface, and is used to animate attributes representable
  48             by a color value.
  49          */
  50         class ColorAnimation : public Animation
  51         {
  52         public:
  53             typedef RGBColor ValueType;
  54
  55             /** Set the animation to the given color value
  56
  57                 @param rColor
  58                 Current animation value.
  59              */
  60             virtual bool operator()( const ValueType& rColor ) = 0;
  61
  62             /** Request the underlying value for this animation.
  63
  64                 This is necessary for pure To or By animations, as the
  65                 Activity cannot determine a sensible start value
  66                 otherwise.
  67
  68                 @attention Note that you are only permitted to query
  69                 for the underlying value, if the animation has actually
  70                 been started (via start() call).
  71              */
  72             virtual ValueType getUnderlyingValue() const = 0;
  73         };
  74
  75         typedef ::boost::shared_ptr< ColorAnimation > ColorAnimationSharedPtr;
  76
  77     }
  78 }
  79
  80 #endif /* INCLUDED_SLIDESHOW_COLORANIMATION_HXX */