layout.signal_train_added.connect(sigc::mem_fun(this, &Engineer::train_added));
layout.signal_block_reserved.connect(sigc::hide<1>(sigc::mem_fun(this, &Engineer::reset_block_color)));
layout.signal_emergency.connect(sigc::mem_fun(this, &Engineer::set_status));
layout.signal_train_added.connect(sigc::mem_fun(this, &Engineer::train_added));
layout.signal_block_reserved.connect(sigc::hide<1>(sigc::mem_fun(this, &Engineer::reset_block_color)));
layout.signal_emergency.connect(sigc::mem_fun(this, &Engineer::set_status));