multi_listenable_builder 1.0.0

A widget builder whose content stays synced with one or more Listenables.

example/main.dart

import 'package:flutter/material.dart';
import 'package:multi_listenable_builder/multi_listenable_builder.dart';

void main() {
  runApp(const MyApp());
}

class CounterModel extends ChangeNotifier {
  int _count = 0;

  void increment() {
    _count++;
    notifyListeners();
  }

  int get count => _count;
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  MyHomePage({super.key});

  // create model
  final CounterModel _counterModel = CounterModel();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('My Home Page'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'You have pushed the button this many times:',
            ),
            MultiListenableBuilder(
              // supply the instance of `ChangeNotifier` model,
              // whether you get it from the build context or anywhere
              notifiers: [_counterModel],
              // this builder function will be executed,
              // once the `ChangeNotifier` model is updated
              builder: (BuildContext context, _) {
                return Text(
                  '${_counterModel.count}',
                  style: Theme.of(context).textTheme.headlineMedium,
                );
              },
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _counterModel.increment,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ),
    );
  }
}