tgl_forward->set_geometry(GLtk::Geometry(geom.w-30, geom.h-59, 20, 27));
tgl_forward->set_value(!train.get_locomotive().get_reverse());
tgl_forward->signal_toggled.connect(sigc::mem_fun(this, &TrainPanel::forward_toggled));
tgl_forward->set_geometry(GLtk::Geometry(geom.w-30, geom.h-59, 20, 27));
tgl_forward->set_value(!train.get_locomotive().get_reverse());
tgl_forward->signal_toggled.connect(sigc::mem_fun(this, &TrainPanel::forward_toggled));