reactiv 0.2.5

Reactive state management approach and dependency injection inspired by GetX

example/lib/main.dart

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

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

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

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

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {


  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: const LaunchPage(),
    );
  }
}

class LaunchPage extends StatelessWidget {
  const LaunchPage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Center(
      child: ElevatedButton(
        onPressed: () {
          Navigator.of(context).push(MaterialPageRoute(builder: (context) {
            return const CounterScreen();
          }));
        },
        child: const Text('Next Page'),
      ),
    );
  }
}




class CounterController extends ReactiveController {
  final count = ReactiveInt(0);

  void increment() {
    count.value++;
  }
}

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

  @override
  State<CounterScreen> createState() => _CounterScreenState();
}

class _CounterScreenState extends State<CounterScreen> {

  @override
  void initState() {
    super.initState();
    ///Inject Dependency => Controller instance
    Dependency.put(CounterController());
  }

  @override
  Widget build(BuildContext context) {
    ///Find Dependency => Controller instance
    final controller = Dependency.find<CounterController>();
    return Scaffold(
      appBar: AppBar(
        title: const Text('Reactiv Counter'),
      ),
      body: Center(
        child: Observer(
          listenable: controller.count, // Listen to the reactive variable
          listener: (count) {
            return Text(
              'Count: $count',
              style: const TextStyle(fontSize: 24),
            );
          },
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          controller.increment();
        },
        child: const Icon(Icons.add),
      ),
    );
  }
}