slideshow/source/inc/pairanimation.hxx

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  19
  20 #ifndef INCLUDED_SLIDESHOW_SOURCE_INC_PAIRANIMATION_HXX
  21 #define INCLUDED_SLIDESHOW_SOURCE_INC_PAIRANIMATION_HXX
  22
  23 #include "animation.hxx"
  24 #include <basegfx/tuple/b2dtuple.hxx>
  25
  26
  27 /* Definition of PairAnimation interface */
  28
  29 namespace slideshow::internal
  30     {
  31         /** Interface defining a pair of numbers animation.
  32
  33             This interface is a specialization of the Animation
  34             interface, and is used to animate attributes representable
  35             by a pair of floating point values (e.g. a position or a
  36             size).
  37          */
  38         class PairAnimation : public Animation
  39         {
  40         public:
  41             typedef ::basegfx::B2DTuple ValueType;
  42
  43             /** Set the animation to the given value
  44
  45                 @param rValue
  46                 Current animation value.
  47              */
  48             virtual bool operator()( const ::basegfx::B2DTuple& rValue ) = 0;
  49
  50             /** Request the underlying value for this animation.
  51
  52                 This is necessary for pure To or By animations, as the
  53                 Activity cannot determine a sensible start value
  54                 otherwise.
  55
  56                 @attention Note that you are only permitted to query
  57                 for the underlying value, if the animation has actually
  58                 been started (via start() call).
  59              */
  60             virtual ::basegfx::B2DTuple getUnderlyingValue() const = 0;
  61         };
  62
  63         typedef ::std::shared_ptr< PairAnimation > PairAnimationSharedPtr;
  64
  65 }
  66
  67 #endif // INCLUDED_SLIDESHOW_SOURCE_INC_PAIRANIMATION_HXX
  68
  69 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */