49 lines
1.3 KiB
Dart
49 lines
1.3 KiB
Dart
import 'dart:async';
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import 'package:bloc/bloc.dart';
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import 'package:flutter/material.dart';
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import 'bloc_module.dart';
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class SwappingBloc<TBloc> {
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final TBloc initialBloc;
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final StreamController<TBloc> updater = StreamController<TBloc>();
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SwappingBloc(this.initialBloc);
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void swap(TBloc bloc) {
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updater.add(bloc);
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}
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}
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class SwappingBlocModule<TBloc extends StateStreamableSource<TState>, TState> extends StatefulWidget {
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final SwappingBloc<TBloc> bloc;
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final Widget Function(BuildContext context, TBloc bloc, TState state) child;
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const SwappingBlocModule({super.key, required this.bloc, required this.child});
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@override
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State<SwappingBlocModule<TBloc, TState>> createState() => _SwappingBlocModuleState<TBloc, TState>();
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}
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class _SwappingBlocModuleState<TBloc extends StateStreamableSource<TState>, TState> extends State<SwappingBlocModule<TBloc, TState>> {
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late TBloc bloc;
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@override
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void initState() {
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super.initState();
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bloc = widget.bloc.initialBloc;
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widget.bloc.updater.stream.listen((event) {
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setState(() {
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bloc = event;
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});
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});
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}
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@override
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Widget build(BuildContext context) => BlocModule<TBloc, TState>(
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autoRebuild: true,
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create: (context) => bloc,
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child: (context, bloc, state) => widget.child(context, bloc, state),
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);
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}
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