sm_view_model 0.1.8

SMViewModel

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:sm_view_model/sm_view_model.dart';

void main() {
  runApp(const ProviderScope(child: MyApp()));
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      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
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(backgroundColor: Theme.of(context).colorScheme.inversePrimary, title: Text(widget.title)),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            ProviderScope(
              overrides: [_counterProvider.overrideWith((ref) => _CounterViewModel(1))],
              child: Consumer(
                builder: (BuildContext context, WidgetRef ref, Widget? child) {
                  var vms = ref.watch(_counterProvider);
                  var vm = ref.read(_counterProvider.notifier);
                  return Row(
                    children: [
                      Text('${vms.data}', style: Theme.of(context).textTheme.headlineMedium),
                      FloatingActionButton(onPressed: vm.increment, tooltip: 'Increment', child: const Icon(Icons.add)),
                    ],
                  );
                },
              ),
            ),
            ProviderScope(
              overrides: [_counterProvider.overrideWith((ref) => _CounterViewModel(2))],
              child: Consumer(
                builder: (BuildContext context, WidgetRef ref, Widget? child) {
                  var vms = ref.watch(_counterProvider);
                  var vm = ref.read(_counterProvider.notifier);
                  return Row(
                    children: [
                      Text('${vms.data}', style: Theme.of(context).textTheme.headlineMedium),
                      FloatingActionButton(onPressed: vm.increment, tooltip: 'Increment', child: const Icon(Icons.add)),
                    ],
                  );
                },
              ),
            ),
          ],
        ),
      ),
    );
  }
}

final _counterProvider = StateNotifierProvider((ref) {
  return _CounterViewModel(0);
});

class _CounterViewModel extends SMViewModel<int> {
  _CounterViewModel(int super.value);

  void increment() {
    var value = data! + 1;
    finish(value);
  }
}