chk_power->signal_toggled().connect(sigc::mem_fun(this, &MainPanel::ui_power_changed));
hbox->pack_start(*manage(chk_halt = new Gtk::CheckButton("Halt")), false, true);
chk_power->signal_toggled().connect(sigc::mem_fun(this, &MainPanel::ui_power_changed));
hbox->pack_start(*manage(chk_halt = new Gtk::CheckButton("Halt")), false, true);