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21 
22 
23 
24 #ifndef INCLUDED_SLIDESHOW_EVENTHANDLER_HXX
25 #define INCLUDED_SLIDESHOW_EVENTHANDLER_HXX
26 
27 #include <boost/shared_ptr.hpp>
28 
29 
30 /* Definition of EventHandler interface */
31 
32 namespace slideshow
33 {
34     namespace internal
35     {
36 
37         /** Interface for event handling objects.
38 
39         	Classes implementing this interface can be added to an
40         	EventMultiplexer object, and are called from there to
41         	handle events.
42          */
43         class EventHandler
44         {
45         public:
~EventHandler()46             virtual ~EventHandler() {}
47 
48             /** Handle the event.
49 
50             	@return true, if this handler has successfully
51             	processed the event. When this method returns false,
52             	possibly other, less prioritized handlers are called,
53             	too.
54              */
55             virtual bool handleEvent() = 0;
56         };
57 
58         typedef ::boost::shared_ptr< EventHandler > EventHandlerSharedPtr;
59 
60     }
61 }
62 
63 #endif /* INCLUDED_SLIDESHOW_EVENTHANDLER_HXX */
64