system.hpp

00001 #ifndef _SYSTEM_HPP
00002 #define _SYSTEM_HPP
00003 
00004 #include "key_handler.hpp"
00005 #include <string>
00006 
00007 class State;
00008 class DisplayManager;
00009 class KeyboardManager;
00010 class DtmfGenerator;
00011 
00012 
00013 class System : public KeyHandler {
00014 public:
00015     enum StateId { 
00016         Init, Edit, Command, Sending,
00017         NumStates
00018     };
00019 
00020     System(DisplayManager *display, KeyboardManager *keyboard, DtmfGenerator *dtmf);
00021 
00022     DisplayManager *display() { return this->display_; }
00023     KeyboardManager *keyboard() { return this->keyboard_; }
00024     DtmfGenerator *dtmf() { return this->dtmf_; }
00025         
00026     void registerState(StateId id, State *state);
00027     void unregisterState(State *state);
00028     
00029     void setState(StateId newState);
00030     State * state() const { return this->state_; }
00031 
00032     void insertSymbol(char ch);
00033     void deleteCurrentSymbol();
00034     void clearText();
00035     const std::string &text() const { return this->text_; }
00036     std::size_t text_size() const { return this->len_; }
00037     
00038     void moveCursorTo(int pos);
00039     void moveCursorBy(int delta);
00040     std::size_t cursor() const { return this->pos_; }
00041     
00042     // KeyHandler implementation
00043     virtual void handleKey(char ch);
00044      
00045 private:
00046     void setCursorPosition(int pos);
00047     
00048     DisplayManager *display_;
00049     KeyboardManager *keyboard_;
00050     DtmfGenerator *dtmf_;
00051 
00052     State *state_;
00053     State *states_[NumStates];
00054 
00055     std::string text_;
00056     std::size_t len_;
00057     std::size_t pos_;
00058 };
00059 
00060 #endif