void set_bind_button_state (guint button, guint statemask);
void get_bind_button_state (guint &button, guint &statemask);
bool button_press_handler (GdkEventButton *);
void set_bind_button_state (guint button, guint statemask);
void get_bind_button_state (guint &button, guint &statemask);
bool button_press_handler (GdkEventButton *);