slideshow/source/inc/eventhandler.hxx

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  19
  20 #ifndef INCLUDED_SLIDESHOW_SOURCE_INC_EVENTHANDLER_HXX
  21 #define INCLUDED_SLIDESHOW_SOURCE_INC_EVENTHANDLER_HXX
  22
  23 #include <memory>
  24
  25
  26 /* Definition of EventHandler interface */
  27
  28 namespace slideshow::internal
  29     {
  30
  31         /** Interface for event handling objects.
  32
  33             Classes implementing this interface can be added to an
  34             EventMultiplexer object, and are called from there to
  35             handle events.
  36          */
  37         class EventHandler
  38         {
  39         public:
  40             virtual ~EventHandler() {}
  41
  42             /** Handle the event.
  43
  44                 @return true, if this handler has successfully
  45                 processed the event. When this method returns false,
  46                 possibly other, less prioritized handlers are called,
  47                 too.
  48              */
  49             virtual bool handleEvent() = 0;
  50         };
  51
  52         typedef ::std::shared_ptr< EventHandler > EventHandlerSharedPtr;
  53
  54 }
  55
  56 #endif // INCLUDED_SLIDESHOW_SOURCE_INC_EVENTHANDLER_HXX
  57
  58 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */