inherited_stream

Description:

inherited stream

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