i18nu 0.0.1+1

Simple internationalization intermediary classes and delegates

example/lib/main.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:i18nu/i18nu.dart';

import 'localization_delegate.dart';
import 'localizations.dart';

void main() => runApp(I18n(child: MyApp()));

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    const supported = [
      Locale('en', 'US'),
      Locale('pt', 'BR'),
      // TODO: add multi plural language(s)
    ];
    final i18n = I18n.of(context);

    return MaterialApp(
      title: 'I18nu Demo',
      theme: ThemeData(),
      localizationsDelegates: [
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
        const MyL10nDelegate(
          supported: supported,
          dataSource: AssetBundleL10nDataSource(bundlePath: 'l10n/'),
        ),
      ],
      home: const MyHomePage(supportedLocales: supported),
      locale: i18n.locale,
      supportedLocales: supported,
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({
    Key key,
    @required this.supportedLocales,
  }) : super(key: key);

  final List<Locale> supportedLocales;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;
  String _gender = '';

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final homepageL10n = HomePageL10n.of(context);
    final counterL10n = CounterL10n.of(context);

    return Scaffold(
      appBar: AppBar(title: Text(homepageL10n.title)),
      body: SingleChildScrollView(
        padding: const EdgeInsets.symmetric(vertical: 16, horizontal: 24),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.start,
          children: <Widget>[
            CupertinoSegmentedControl<Locale>(
              children: Map.fromIterable(
                widget.supportedLocales,
                key: (dynamic loc) => loc,
                value: (dynamic locale) => Text(locale.toString()),
              ),
              groupValue: Localizations.localeOf(context),
              onValueChanged: (locale) => updateLocale(context, locale),
            ),
            const Divider(height: 32),
            Text(
              homepageL10n.hello(name: 'Name', world: 'Flutter'),
              style: theme.textTheme.title,
            ),
            Text(
              homepageL10n.today(DateTime.now()),
              style: theme.textTheme.subtitle,
            ),
            CupertinoSegmentedControl<String>(
              padding: const EdgeInsets.symmetric(vertical: 8),
              children: const {
                'male': Text('MALE'),
                'female': Text('FEMALE'),
                '': Text('OTHER'),
              },
              groupValue: _gender,
              onValueChanged: updateGender,
            ),
            Text(homepageL10n.gendered(_gender)),
            const Divider(height: 32),
            Text(
              counterL10n.clicked(_counter),
              style: theme.textTheme.display1,
            ),
            FlatButton(
              child: Text(counterL10n.resetCounter),
              onPressed: resetCounter,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: incrementCounter,
        tooltip: counterL10n.clickMe,
        child: Icon(Icons.add),
      ),
    );
  }

  void incrementCounter() => setState(() => _counter++);

  void resetCounter() => setState(() => _counter = 0);

  void updateGender(String gender) => setState(() => _gender = gender);

  void updateLocale(BuildContext context, Locale locale) =>
      I18n.of(context).locale = locale;
}