event_bus_global 1.0.1

Type-safe global event bus for Flutter.

example/lib/main.dart

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

final counterEvent = EventBusIdentifier<int>('counter');

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

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

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  int _total = 0;
  ListenerDisposable? _subscription;

  @override
  void initState() {
    super.initState();
    _subscription = EventBusGlobal.event(counterEvent).listenManually((value) {
      setState(() => _total += value);
    }, sticky: true);
  }

  @override
  void dispose() {
    _subscription?.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: const Text('event_bus_global')),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              EventBusBuilder<int>(
                event: counterEvent,
                sticky: true,
                builder: (context, value) => Text(
                  '${value ?? 0}',
                  style: const TextStyle(fontSize: 48),
                ),
              ),
              const SizedBox(height: 24),
              Text(
                'Total (listener manual): $_total',
                style: const TextStyle(fontSize: 16),
              ),
            ],
          ),
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: () => EventBusGlobal.event(counterEvent).emit(1),
          child: const Icon(Icons.add),
        ),
      ),
    );
  }
}