slideshow/source/inc/enumanimation.hxx

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  19
  20 #ifndef INCLUDED_SLIDESHOW_SOURCE_INC_ENUMANIMATION_HXX
  21 #define INCLUDED_SLIDESHOW_SOURCE_INC_ENUMANIMATION_HXX
  22
  23 #include "animation.hxx"
  24
  25
  26 /* Definition of EnumAnimation interface */
  27
  28 namespace slideshow
  29 {
  30     namespace internal
  31     {
  32         /** Interface defining an enum animation.
  33
  34             This interface is a specialization of the Animation
  35             interface, and is used to animate attributes representable
  36             by a set of constant values, such as UNO constants, or enums.
  37          */
  38         class EnumAnimation : public Animation
  39         {
  40         public:
  41             typedef sal_Int16 ValueType;
  42
  43             /** Set the animation to value k
  44
  45                 @param k
  46                 Current animation value (must be in an
  47                 attribute-specific permissible range). Overflowing
  48                 values will be clipped to the permissible range
  49                 internally.
  50              */
  51             virtual bool operator()( ValueType k ) = 0;
  52
  53             /** Request the underlying value for this animation.
  54
  55                 This is necessary for pure To or By animations, as the
  56                 Activity cannot determine a sensible start value
  57                 otherwise.
  58
  59                 @attention Note that you are only permitted to query
  60                 for the underlying value, if the animation has actually
  61                 been started (via start() call).
  62              */
  63             virtual ValueType getUnderlyingValue() const = 0;
  64         };
  65
  66         typedef ::std::shared_ptr< EnumAnimation > EnumAnimationSharedPtr;
  67
  68     }
  69 }
  70
  71 #endif // INCLUDED_SLIDESHOW_SOURCE_INC_ENUMANIMATION_HXX
  72
  73 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */