[Flutter redux] #Flutter #Redux

redux.dart

import 'package:flutter/material.dart';
import 'package:flutter_redux/flutter_redux.dart';
import 'package:redux/redux.dart';

enum Actions { Increment, Decrement, Reset }

class AppState {
  final int count;
  AppState({this.count = 0});
}

AppState counterReducer(AppState state, action) {
  if (action == Actions.Increment) {
    return new AppState(count: state.count + 1);
  } else if (action == Actions.Decrement) {
    return new AppState(count: state.count - 1);
  } else if (action == Actions.Reset) {
    return new AppState(count: 0);
  }
  return state;
}

void main() {
  final store = new Store(counterReducer, initialState: new AppState(count: 0));
  runApp(new CounterApp(store: store));
}

class CounterApp extends StatelessWidget {
  final Store<AppState> store;

  CounterApp({Key key, this.store}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return new StoreProvider(
      store: store,
      child: new MaterialApp(
        home: new Scaffold(
          body: new Center(
            child: StoreConnector<AppState, Store>(
              builder: (context, _store) {
                return GestureDetector(
                  child: Text(
                    _store.state.count.toString(),
                    style: TextStyle(
                      fontSize: 30,
                    ),
                  ),
                  onTap: () => _store.dispatch(Actions.Decrement),
                  onDoubleTap: () => _store.dispatch(Actions.Reset),
                  onLongPress: () => _store.dispatch(Actions.Reset),
                );
              },
              converter: (store) {
                return store;
              },
            ),
          ),
          floatingActionButton: new StoreConnector<AppState, VoidCallback>(
              builder: (context, callback) {
            return new FloatingActionButton(
              onPressed: callback,
              child: Icon(Icons.add),
            );
          }, converter: (store) {
            return () => store.dispatch(Actions.Increment);
          }),
        ),
      ),
    );
  }
}