changes method

@override Stream<void> changes()

Implementation

@override
Stream<void> changes() {
  // https://github.com/dart-lang/linter/issues/1381
  // ignore: close_sinks
  late StreamController<void> controller;
  SemanticsHandle? handle;

  void onStart() {
    handle = _pipelineOwner.ensureSemantics(
      listener: () => controller.add(null),
    );
  }

  void onStop() {
    handle?.dispose();
    handle = null;
  }

  controller = StreamController<void>(
    onListen: onStart,
    onPause: onStop,
    onResume: onStart,
    onCancel: onStop,
  );

  return controller.stream;
}