void add_cinema_clicked ();
void edit_cinema_clicked ();
void remove_cinema_clicked ();
void add_screen_clicked ();
void edit_screen_clicked ();
void remove_screen_clicked ();
void add_cinema_clicked ();
void edit_cinema_clicked ();
void remove_cinema_clicked ();
void add_screen_clicked ();
void edit_screen_clicked ();
void remove_screen_clicked ();