-
-
Save DiegoCarvalho75/aa06f811b9c4fd38b483a86e0d8db7a2 to your computer and use it in GitHub Desktop.
Using Riverpod for Widget generation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import 'dart:async'; | |
import 'package:flutter/material.dart'; | |
import 'package:flutter_riverpod/flutter_riverpod.dart'; | |
import 'package:riverpod_annotation/riverpod_annotation.dart'; | |
part 'generated.g.dart'; | |
@riverpod | |
class GeneratedWidget extends _$GeneratedWidget { | |
@override | |
Widget build(BuildContext context) { | |
return const Text('Generated widget!'); | |
} | |
} | |
@riverpod | |
class StreamWidget extends _$StreamWidget { | |
@override | |
Stream<Widget> build(BuildContext context) async* { | |
final controller = StreamController<int>(); | |
final timer = Timer.periodic(const Duration(seconds: 1), (timer) { | |
controller.add(timer.tick); | |
}); | |
yield* controller.stream.map((event) => Text('Stream widget: $event')); | |
timer.cancel(); | |
await controller.close(); | |
} | |
} | |
@riverpod | |
class FutureWidget extends _$FutureWidget { | |
@override | |
Future<Widget> build(BuildContext context) async { | |
await Future.delayed(const Duration(seconds: 3)); | |
return const Text('Future completed!'); | |
} | |
} | |
class Example extends StatelessWidget { | |
const Example({super.key}); | |
@override | |
Widget build(BuildContext context) { | |
return MaterialApp( | |
home: Scaffold( | |
body: Column( | |
children: [ | |
Consumer(builder: (context, ref, child) { | |
final generated = ref.watch(generatedWidgetProvider(context)); | |
return generated; | |
}), | |
Consumer(builder: (context, ref, child) { | |
final stream = ref.watch(streamWidgetProvider(context)); | |
return stream.when( | |
data: (data) => data, | |
error: (error, stack) => Text(error.toString()), | |
loading: () => const CircularProgressIndicator(), | |
); | |
}), | |
Consumer(builder: (context, ref, child) { | |
final future = ref.watch(futureWidgetProvider(context)); | |
return future.when( | |
data: (data) => data, | |
error: (error, stack) => Text(error.toString()), | |
loading: () => const CircularProgressIndicator(), | |
); | |
}), | |
], | |
), | |
), | |
); | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment