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             virtual ~Animation() override {}
  51
  52             /** Notify that the animation going active soon.
  53
  54                 Implementers should preload any buffers, and create
  55                 any expensive objects at this time.
  56
  57                 @param rShape
  58                 Shape to apply this animation to.
  59
  60                 @param rAttrLayer
  61                 Attribute layer to play the animation on.
  62              */
  63             virtual void prefetch( const AnimatableShapeSharedPtr&     rShape,
  64                                    const ShapeAttributeLayerSharedPtr& rAttrLayer ) = 0;
  65
  66             /** Notify that the animation is about to begin.
  67
  68                 Implementers are free to start accompanying effects,
  69                 such as sounds, and the animation timer now.
  70
  71                 @param rShape
  72                 Shape to apply this animation to.
  73
  74                 @param rAttrLayer
  75                 Attribute layer to play the animation on.
  76              */
  77             virtual void start( const AnimatableShapeSharedPtr&     rShape,
  78                                 const ShapeAttributeLayerSharedPtr& rAttrLayer ) = 0;
  79
  80             /** Notify that the animation is about to end.
  81              */
  82             virtual void end() = 0;
  83         };
  84
  85         typedef ::std::shared_ptr< Animation > AnimationSharedPtr;
  86
  87     }
  88 }
  89
  90 #endif // INCLUDED_SLIDESHOW_SOURCE_INC_ANIMATION_HXX
  91
  92 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */