slideshow/source/inc/eventhandler.hxx

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  30
  31 #ifndef INCLUDED_SLIDESHOW_EVENTHANDLER_HXX
  32 #define INCLUDED_SLIDESHOW_EVENTHANDLER_HXX
  33
  34 #include <boost/shared_ptr.hpp>
  35
  36
  37 /* Definition of EventHandler interface */
  38
  39 namespace slideshow
  40 {
  41     namespace internal
  42     {
  43
  44         /** Interface for event handling objects.
  45
  46             Classes implementing this interface can be added to an
  47             EventMultiplexer object, and are called from there to
  48             handle events.
  49          */
  50         class EventHandler
  51         {
  52         public:
  53             virtual ~EventHandler() {}
  54
  55             /** Handle the event.
  56
  57                 @return true, if this handler has successfully
  58                 processed the event. When this method returns false,
  59                 possibly other, less prioritized handlers are called,
  60                 too.
  61              */
  62             virtual bool handleEvent() = 0;
  63         };
  64
  65         typedef ::boost::shared_ptr< EventHandler > EventHandlerSharedPtr;
  66
  67     }
  68 }
  69
  70 #endif /* INCLUDED_SLIDESHOW_EVENTHANDLER_HXX */