inherited_stream 1.1.0

An inherited widget for Streams, which updates its dependencies when the stream emits data.

Inherited Stream

An InheritedWidget for Streams, which updates its dependencies when the Stream emits.

Usage

Create an InheritedStream

class ProgressModel extends InheritedStream<ValueStream<double>> {
  const ProgressModel({
    Key key,
    ValueStream<double> stream,
    Widget child,
  }) : super(key: key, stream: stream, child: child);

  static double of(BuildContext context) {
    return context
        .dependOnInheritedWidgetOfExactType<ProgressModel>()
        .stream
        .value;
  }
}

Insert into the Widget Tree

class _MyState extends State<MyPage> {
  final _subject = BehaviorSubject<double>.seeded(0.0);

  @override
  void dispose() {
    _subject.close();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: ProgressModel(
        stream: _subject.stream,
        child: Progress(),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () => _subject.add(Random.nextDouble()),
      ),
    );
  }
}

Register Dependant(s)

class Progress extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return CircularProgressIndicator(value: ProgressModel.of(context));
  }
}