osam 1.3.3

State management library

example/lib/main.dart

import 'package:example/middleware.dart';
import 'package:example/presenter.dart';
import 'package:example/state.dart';
import 'package:flutter/material.dart';
import 'package:osam/osam.dart';

void main() => runApp(MyApp());

enum EventType { increment, incrementValue }

class MyApp extends StatelessWidget {
  final store = Store(Counter(), middleWares: [MyMiddleware()]);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: StoreProvider(
        child: MyHomePage(),
        store: store,
      ),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                'You have pushed the button this many times:',
              ),
              StreamBuilder(
                initialData: StoreProvider.of<Store<Counter>>(context).state.count,
                stream: StoreProvider.of<Store<Counter>>(context)
                    .state
                    .propertyStream<Counter, int>((state) => state.count),
                builder: (ctx, AsyncSnapshot<int> snapshot) {
                  return Text(snapshot.data.toString());
                },
              )
            ],
          ),
        ),
        floatingActionButton: PresenterProvider(
          presenter: ExamplePresenter(),
          child: Button(),
        ));
  }
}
class Button extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return FloatingActionButton(
      onPressed: () {
        StoreProvider.of<Store<Counter>>(context).dispatchEvent(
            event: Event.modify(
                reducerCaller: (state, _) => state..increment(1), type: EventType.increment));
        StoreProvider.of<Store<Counter>>(context).dispatchEvent(
            event: Event.modify(reducerCaller: (state, _) => state..increment(2)));
        StoreProvider.of<Store<Counter>>(context).dispatchEvent(
            event: Event.modify(reducerCaller: (state, _) => state..increment(3)));
      },
    );
  }

}