slideshow/source/inc/event.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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   9  * This file incorporates work covered by the following license notice:
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  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19 #ifndef INCLUDED_SLIDESHOW_SOURCE_INC_EVENT_HXX
  20 #define INCLUDED_SLIDESHOW_SOURCE_INC_EVENT_HXX
  21
  22 #include "disposable.hxx"
  23 #include <rtl/ustring.hxx>
  24 #include <boost/shared_ptr.hpp>
  25 #include <vector>
  26
  27 namespace slideshow {
  28 namespace internal {
  29
  30 /** Definition of Event interface
  31  */
  32 class Event : public Disposable
  33 {
  34 public:
  35     Event (const OUString& rsDescription) : msDescription(rsDescription) {}
  36
  37     /** Execute the event.
  38
  39         @return true, if event was successfully executed.
  40     */
  41     virtual bool fire() = 0;
  42
  43     /** Query whether this event is still charged, i.e. able
  44         to fire.
  45
  46         Inactive events are ignored by the normal event
  47         containers (EventQueue, UserEventQueue etc.), and no
  48         explicit fire() is called upon them.
  49
  50         @return true, if this event has already been fired.
  51     */
  52     virtual bool isCharged() const = 0;
  53
  54     /** Query the activation time instant this event shall be
  55         fired, if it was inserted at instant nCurrentTime into
  56         the queue.
  57
  58         @param nCurrentTime
  59         The time from which the activation time is to be
  60         calculated from.
  61
  62         @return the time instant in seconds, on which this
  63         event is to be fired.
  64     */
  65     virtual double getActivationTime( double nCurrentTime ) const = 0;
  66
  67     const OUString& GetDescription() const { return msDescription; }
  68
  69 private:
  70     const OUString msDescription;
  71 };
  72
  73 typedef ::boost::shared_ptr< Event > EventSharedPtr;
  74 typedef ::std::vector< EventSharedPtr > VectorOfEvents;
  75
  76 } // namespace internal
  77 } // namespace presentation
  78
  79 #endif // INCLUDED_SLIDESHOW_SOURCE_INC_EVENT_HXX
  80
  81 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */