slideshow/source/inc/hslcoloranimation.hxx

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  19
  20 #ifndef INCLUDED_SLIDESHOW_SOURCE_INC_HSLCOLORANIMATION_HXX
  21 #define INCLUDED_SLIDESHOW_SOURCE_INC_HSLCOLORANIMATION_HXX
  22
  23 #include "animation.hxx"
  24 #include "hslcolor.hxx"
  25
  26
  27 /* Definition of HSLColorAnimation interface */
  28
  29 namespace slideshow
  30 {
  31     namespace internal
  32     {
  33         /** Interface defining a HSL color animation.
  34
  35             This interface is a specialization of the Animation
  36             interface, and is used to animate attributes representable
  37             by a HSL color value.
  38          */
  39         class HSLColorAnimation : public Animation
  40         {
  41         public:
  42             typedef HSLColor ValueType;
  43
  44             /** Set the animation to the given color value
  45
  46                 @param rColor
  47                 Current animation value.
  48              */
  49             virtual bool operator()( const ValueType& rColor ) = 0;
  50
  51             /** Request the underlying value for this animation.
  52
  53                 This is necessary for pure To or By animations, as the
  54                 Activity cannot determine a sensible start value
  55                 otherwise.
  56
  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).
  60              */
  61             virtual ValueType getUnderlyingValue() const = 0;
  62         };
  63
  64         typedef ::std::shared_ptr< HSLColorAnimation > HSLColorAnimationSharedPtr;
  65
  66     }
  67 }
  68
  69 #endif // INCLUDED_SLIDESHOW_SOURCE_INC_HSLCOLORANIMATION_HXX
  70
  71 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */