KeyboardEventServer.h

00001 #ifndef KEYBOARD_EVENT_SERVER_H_
00002 #define KEYBOARD_EVENT_SERVER_H_
00003 
00004 #include <cstdlib>
00005 
00006 namespace kbd_mgr {
00007 
00008 template <class HandlerClass>
00009 class KeyboardEventServer {
00010 protected:
00011     KeyboardEventServer() : handler_(NULL), ownHandler_(false) { }
00012 
00013     ~KeyboardEventServer()
00014     {
00015         clearHandler();
00016     }
00017     
00018     void setHandler(HandlerClass *h, bool owner = true) {
00019         this->handler_ = h;
00020         this->ownHandler_ = owner;
00021     }
00022     
00023     void clearHandler() {
00024         if (this->ownHandler_) {
00025             delete this->handler_;
00026         }
00027         this->handler_ = NULL;
00028         this->ownHandler_ = false;
00029     }
00030 
00031     HandlerClass *handler() const { return this->handler_; }
00032 
00033     bool hasHandler() const { return this->handler_ != NULL; }
00034     
00035 public:
00036     void attach(HandlerClass *handler) {
00037         setHandler(handler, false);
00038     }
00039     void attach(HandlerClass &handler) {
00040         setHandler(&handler, false);
00041     }
00042     
00043     void detach() {
00044         clearHandler();
00045     }
00046 
00047 private:
00048     HandlerClass *handler_;
00049     bool ownHandler_;
00050 };
00051 
00052 } // kbd_mgr
00053 
00054 #endif // KEYBOARD_EVENT_SERVER_H_