+ start = cyl->start.mbar;
+ end = cyl->end.mbar;
+ set = start || end;
+ if (!set) {
+ start = cyl->sample_start.mbar;
+ end = cyl->sample_end.mbar;
+ }
+ gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(cylinder->pressure_button), set);
+ gtk_widget_set_sensitive(cylinder->start, set);
+ gtk_widget_set_sensitive(cylinder->end, set);
+