+ return last_call.equals(call);
+ }
+
+ void show(AltosState state, AltosListenerState listener_state) {
+ if (!same_call(state.callsign)) {
+ value.setText(state.callsign);
+ if (state.callsign == null)
+ setVisible(false);
+ else
+ setVisible(true);
+ last_call = state.callsign;
+ }