event/Listener.h

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#ifndef SDL_EVENT_LISTENER_H
#define SDL_EVENT_LISTENER_H

#include <SDL.h>

namespace sdl {
namespace event {
    class basic_Listener {
        public:
            virtual ~basic_Listener () {
            };

            virtual bool operator== (const SDL_Event* event) { 
                return false; 
            };

            virtual void operator() (const SDL_Event* event) = 0;
    }; //basic_Listener

    template<class EventType, class Handler>
    class Listener : public basic_Listener {
        public:
            typedef void (Handler::*HandleFunc) (const EventType& event);

            virtual bool operator== (const SDL_Event* event) { 
                return EventType::is (event); 
            };

            Listener (Handler& h, HandleFunc func)
              : basic_Listener (), h_ (h), func_ (func) {
            }; 

            virtual ~Listener () {
            };

            virtual void operator() (const SDL_Event* event) {
              (h_.*func_) (EventType (event));
            };

        private:
            Handler& h_;

            HandleFunc func_;
    }; //Listener
}; //event
}; //sdl

#endif //SDL_EVENT_LISTENER_H