+ void tab_toggled(bool, Msp::GLtk::Widget *);
+ void locomotive_detected(const R2C2::Driver::DetectedLocomotive &);
+ void locomotive_gone(const R2C2::Driver::DetectedLocomotive &);
+ void train_added(R2C2::Train &);
+ void train_removed(R2C2::Train &);
+ void train_name_changed(R2C2::Train &);