KeyboardStateHandler.h

00001 #ifndef KEYBOARD_STATE_HANDLER_H_
00002 #define KEYBOARD_STATE_HANDLER_H_
00003 
00004 #include "kbd_mgr/KeyboardState.h"
00005 
00006 namespace kbd_mgr {
00007 
00008 /**
00009  * @brief Interface used to report a keyboard state.
00010  */
00011 class KeyboardStateHandler {
00012 public:
00013     virtual void handleState(const KeyboardState &newState) = 0;
00014     virtual ~KeyboardStateHandler() { }
00015 };
00016 
00017 template <class T>
00018 class MemberKeyboardStateHandler : public KeyboardStateHandler {
00019 public:
00020     typedef void (T::*MemberFunction)(const KeyboardState &);
00021     
00022     MemberKeyboardStateHandler(T *obj, MemberFunction fn) :
00023         object(obj), func(fn)
00024     { }
00025     
00026     virtual void handleState(const KeyboardState &newState) {
00027         (object->*func)(newState);
00028     }
00029     
00030 private:
00031     T *object;
00032     MemberFunction func;
00033 };
00034 
00035 class FunctionKeyboardStateHandler : public KeyboardStateHandler {
00036 public:
00037     typedef void (*HandlerFunction)(const KeyboardState &);
00038 
00039     FunctionKeyboardStateHandler(HandlerFunction fn) :
00040         func(fn)
00041     { }
00042 
00043     virtual void handleState(const KeyboardState &newState) {
00044         func(newState);
00045     }
00046         
00047 private:
00048     HandlerFunction func;
00049 };
00050 
00051 } // kbd_mgr
00052 
00053 #endif // KEYBOARD_STATE_HANDLER_H_