window.signal_close.connect(sigc::bind(sigc::mem_fun(this, &Engineer::exit), 0));
root = new GLtk::Root(ui_res, &window, &keyboard, &mouse);
window.signal_close.connect(sigc::bind(sigc::mem_fun(this, &Engineer::exit), 0));
root = new GLtk::Root(ui_res, &window, &keyboard, &mouse);