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swissonid/i18n.dart

Last active December 5, 2017 08:00
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Flutter App
Raw
gistfile2.txt
import 'package:bill_scanner/generated/i18n.dart';
import 'package:flutter/material.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
localizationsDelegates: [S.delegate],
supportedLocales: S.delegate.supportedLocales,
localeResolutionCallback: S.delegate.resolution(fallback: new Locale("en", "")),
theme: new ThemeData(
// This is the theme of your application.
//
// Try running your application with "flutter run". You'll see the
// application has a blue toolbar. Then, without quitting the app, try
// changing the primarySwatch below to Colors.green and then invoke
// "hot reload" (press "r" in the console where you ran "flutter run",
// or press Run > Flutter Hot Reload in IntelliJ). Notice that the
// counter didn't reset back to zero; the application is not restarted.
primarySwatch: Colors.blue,
),
home: new MyHomePage(title: "test title"),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
// This widget is the home page of your application. It is stateful, meaning
// that it has a State object (defined below) that contains fields that affect
// how it looks.
// This class is the configuration for the state. It holds the values (in this
// case the title) provided by the parent (in this case the App widget) and
// used by the build method of the State. Fields in a Widget subclass are
// always marked "final".
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
// This call to setState tells the Flutter framework that something has
// changed in this State, which causes it to rerun the build method below
// so that the display can reflect the updated values. If we changed
// _counter without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_counter++;
});
}
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return new Scaffold(
appBar: new AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: new Text(widget.title),
),
body: new Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
child: new Column(
// Column is also layout widget. It takes a list of children and
// arranges them vertically. By default, it sizes itself to fit its
// children horizontally, and tries to be as tall as its parent.
//
// Invoke "debug paint" (press "p" in the console where you ran
// "flutter run", or select "Toggle Debug Paint" from the Flutter tool
// window in IntelliJ) to see the wireframe for each widget.
//
// Column has various properties to control how it sizes itself and
// how it positions its children. Here we use mainAxisAlignment to
// center the children vertically; the main axis here is the vertical
// axis because Columns are vertical (the cross axis would be
// horizontal).
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Text(
'You have pushed the button this many times:',
),
new Text(
'$_counter',
style: Theme.of(context).textTheme.display1,
),
],
),
),
floatingActionButton: new FloatingActionButton(
onPressed: _incrementCounter,
tooltip: S.of(context).title,
child: new Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
Raw
i18n.dart
import 'dart:async';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
class S {
Locale _locale;
String _lang;
S(this._locale) {
_lang = getLang(_locale);
print(_lang);
}
static final GeneratedLocalizationsDelegate delegate =
new GeneratedLocalizationsDelegate();
static S of(BuildContext context) {
var s = Localizations.of<S>(context, S);
s._lang = getLang(s._locale);
return s;
}
String get title => "Flutter Demo Home Page";
}
class en extends S {
en(Locale locale) : super(locale);
}
class GeneratedLocalizationsDelegate extends LocalizationsDelegate<S> {
const GeneratedLocalizationsDelegate();
List<Locale> get supportedLocales {
return [
new Locale("en", ""),
];
}
LocaleResolutionCallback resolution({Locale fallback}) {
return (Locale locale, Iterable<Locale> supported) {
var languageLocale = new Locale(locale.languageCode, "");
if (supported.contains(locale))
return locale;
else if (supported.contains(languageLocale))
return languageLocale;
else {
var fallbackLocale = fallback ?? supported.first;
assert(supported.contains(fallbackLocale));
return fallbackLocale;
}
};
}
Future<S> load(Locale locale) {
String lang = getLang(locale);
switch (lang) {
case "en":
return new SynchronousFuture<S>(new en(locale));
default:
return new SynchronousFuture<S>(new S(locale));
}
}
bool isSupported(Locale locale) => supportedLocales.contains(getLang(locale));
bool shouldReload(GeneratedLocalizationsDelegate old) => false;
}
String getLang(Locale l) =>
l.countryCode.isEmpty ? l.languageCode : l.toString();
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