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27 
28 #ifndef INCLUDED_SLIDESHOW_EVENTHANDLER_HXX
29 #define INCLUDED_SLIDESHOW_EVENTHANDLER_HXX
30 
31 #include <boost/shared_ptr.hpp>
32 
33 
34 /* Definition of EventHandler interface */
35 
36 namespace slideshow
37 {
38     namespace internal
39     {
40 
41         /** Interface for event handling objects.
42 
43         	Classes implementing this interface can be added to an
44         	EventMultiplexer object, and are called from there to
45         	handle events.
46          */
47         class EventHandler
48         {
49         public:
50             virtual ~EventHandler() {}
51 
52             /** Handle the event.
53 
54             	@return true, if this handler has successfully
55             	processed the event. When this method returns false,
56             	possibly other, less prioritized handlers are called,
57             	too.
58              */
59             virtual bool handleEvent() = 0;
60         };
61 
62         typedef ::boost::shared_ptr< EventHandler > EventHandlerSharedPtr;
63 
64     }
65 }
66 
67 #endif /* INCLUDED_SLIDESHOW_EVENTHANDLER_HXX */
68