+ threshold_adjustment.signal_value_changed().connect (sigc::mem_fun (*this, &GMCPGUI::threshold_changed));
+
+ label = manage (new Label (_("Threshold:")));
+ label->set_alignment (0, 0.5);
+ table->attach (*label, 0, 1, n, n + 1);
+ table->attach (threshold_spinner, 1, 2, n, n + 1);
+ ++n;
+
+ threshold_spinner.show ();
+ label->show ();
+