slideshow/source/inc/animation.hxx

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  19
  20 #ifndef INCLUDED_SLIDESHOW_SOURCE_INC_ANIMATION_HXX
  21 #define INCLUDED_SLIDESHOW_SOURCE_INC_ANIMATION_HXX
  22
  23 #include "animatableshape.hxx"
  24 #include "shapeattributelayer.hxx"
  25 #include "disposable.hxx"
  26
  27
  28 /* Definition of Animation interface */
  29
  30 namespace slideshow
  31 {
  32     namespace internal
  33     {
  34         /** Interface defining a generic animation.
  35
  36             This interface is used by objects implementing the
  37             Activity interface to drive the animation effect. Objects
  38             implementing this interface will receive time-varying
  39             animation values, which they can forward to the
  40             appropriate attributes. The type of these animation values
  41             is given in derived interfaces.
  42
  43             @see NumberAnimation
  44             @see ColorAnimation
  45             @see PairAnimation
  46          */
  47         class Animation : public virtual SharedPtrAble
  48         {
  49         public:
  50             /** Notify that the animation going active soon.
  51
  52                 Implementers should preload any buffers, and create
  53                 any expensive objects at this time.
  54
  55                 @param rShape
  56                 Shape to apply this animation to.
  57
  58                 @param rAttrLayer
  59                 Attribute layer to play the animation on.
  60              */
  61             virtual void prefetch( const AnimatableShapeSharedPtr&     rShape,
  62                                    const ShapeAttributeLayerSharedPtr& rAttrLayer ) = 0;
  63
  64             /** Notify that the animation is about to begin.
  65
  66                 Implementers are free to start accompanying effects,
  67                 such as sounds, and the animation timer now.
  68
  69                 @param rShape
  70                 Shape to apply this animation to.
  71
  72                 @param rAttrLayer
  73                 Attribute layer to play the animation on.
  74              */
  75             virtual void start( const AnimatableShapeSharedPtr&     rShape,
  76                                 const ShapeAttributeLayerSharedPtr& rAttrLayer ) = 0;
  77
  78             /** Notify that the animation is about to end.
  79              */
  80             virtual void end() = 0;
  81         };
  82
  83         typedef ::std::shared_ptr< Animation > AnimationSharedPtr;
  84
  85     }
  86 }
  87
  88 #endif // INCLUDED_SLIDESHOW_SOURCE_INC_ANIMATION_HXX
  89
  90 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */