sigc::signal<void, const std::string &, float> signal_control_changed;
sigc::signal<void, unsigned, bool> signal_function_changed;
sigc::signal<void, const Route *> signal_route_changed;
+ sigc::signal<void, Block &> signal_advanced;
sigc::signal<void> signal_arrived;
sigc::signal<void, const std::string &> signal_status_changed;