office-gobmx/slideshow/source/inc/pairanimation.hxx

78 lines
2.6 KiB
C++

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#ifndef INCLUDED_SLIDESHOW_PAIRANIMATION_HXX
#define INCLUDED_SLIDESHOW_PAIRANIMATION_HXX
#include "animation.hxx"
#include <basegfx/tuple/b2dtuple.hxx>
/* Definition of PairAnimation interface */
namespace slideshow
{
namespace internal
{
/** Interface defining a pair of numbers animation.
This interface is a specialization of the Animation
interface, and is used to animate attributes representable
by a pair of floating point values (e.g. a position or a
size).
*/
class PairAnimation : public Animation
{
public:
typedef ::basegfx::B2DTuple ValueType;
/** Set the animation to the given value
@param rValue
Current animation value.
*/
virtual bool operator()( const ValueType& rValue ) = 0;
/** Request the underlying value for this animation.
This is necessary for pure To or By animations, as the
Activity cannot determine a sensible start value
otherwise.
@attention Note that you are only permitted to query
for the underlying value, if the animation has actually
been started (via start() call).
*/
virtual ValueType getUnderlyingValue() const = 0;
};
typedef ::boost::shared_ptr< PairAnimation > PairAnimationSharedPtr;
}
}
#endif /* INCLUDED_SLIDESHOW_PAIRANIMATION_HXX */