riverbloc 1.0.0 riverbloc: ^1.0.0 copied to clipboard
BlocProvider implementation with riverpod as alternative to provider, similar to StateNotifierProvider
import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:riverbloc/riverbloc.dart';
void main() {
runApp(const ProviderScope(
child: MyApp(),
));
}
class CounterCubit extends Cubit<int> {
CounterCubit(int state) : super(state);
void increment() => emit(state + 1);
}
final counterProvider =
BlocProvider<CounterCubit, int>((ref) => CounterCubit(0));
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends ConsumerWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
Widget build(BuildContext context, WidgetRef ref) {
// Rebuilds the widget if the cubit/bloc changes.
// But does not rebuild if the state changes with the same cubit/bloc
final counterCubit = ref.watch(counterProvider.notifier);
return Scaffold(
appBar: AppBar(
title: Text(title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'initial counterCubit.state: ${counterCubit.state}',
),
Consumer(builder: (context, ref, __) {
// Rebuilds on every emitted state
final _counter = ref.watch(counterProvider);
return Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
);
}),
//HookConsumer(builder: (context, ref, __) {
// final provider = useMemoized(() {
// return counterProvider
// .when((prev, curr) => (curr + prev) % 5 == 0);
// });
// final _counter = ref.watch(provider.select((state) => 2 * state));
// return Text(
// '$_counter',
// style: Theme.of(context).textTheme.headline4,
// );
//}),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () => ref.read(counterProvider.notifier).increment(),
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}