Zakaria
94 lines
2.8 KiB
Dart
94 lines
2.8 KiB
Dart
import 'dart:collection';
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import 'package:flutter/material.dart';
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import 'package:flutter_gen/gen_l10n/app_localizations.dart';
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import 'package:locale_names/locale_names.dart';
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import '../../services/locale_helper.dart';
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class LanguageList extends StatefulWidget {
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const LanguageList({super.key});
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@override
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State<LanguageList> createState() => _LanguageListState();
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}
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class _LanguageListState extends State<LanguageList> {
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// yeah I'm a computer science student how could you tell
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// (sorts locales without having to copy them into a list first)
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final locales = SplayTreeMap<String?, Locale>.fromIterable(
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AppLocalizations.supportedLocales,
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key: (element) => (element as Locale).defaultDisplayLanguage,
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value: (element) => element,
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);
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@override
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Widget build(BuildContext context) {
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return Scrollbar(
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// We have a ValueListenableBuilder here to rebuild all the ListTiles when
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// the language changes
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child: ValueListenableBuilder(
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valueListenable: LocaleHelper.localeListener,
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builder: (_, __, ___) {
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return CustomScrollView(
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slivers: [
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// For some reason, setting the null (system) LanguageListTile to
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// const stops it from switching when going to/from the same
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// language as the system language (e.g., system to English on a
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// device set to English)
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// ignore: prefer_const_constructors
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SliverList(
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// ignore: prefer_const_constructors
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delegate: SliverChildListDelegate.fixed([
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// ignore: prefer_const_constructors
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LanguageListTile(),
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const Divider(),
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]),
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),
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SliverList(
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delegate: SliverChildBuilderDelegate(
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(context, index) {
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final locale = locales.values.elementAt(index);
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return LanguageListTile(locale: locale);
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},
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childCount: locales.length,
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),
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)
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],
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);
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},
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),
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);
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}
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}
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class LanguageListTile extends StatelessWidget {
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const LanguageListTile({
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super.key,
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this.locale,
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});
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final Locale? locale;
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@override
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Widget build(BuildContext context) {
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return RadioListTile<Locale?>(
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title: Text(locale?.nativeDisplayLanguage ??
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AppLocalizations.of(context)!.system),
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subtitle: locale == null
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? null
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: Text((LocaleHelper.locale == null
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? locale!.defaultDisplayLanguage
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: locale!.displayLanguageIn(LocaleHelper.locale!)) ??
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"???"),
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value: locale,
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groupValue: LocaleHelper.locale,
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onChanged: (_) {
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LocaleHelper.setLocale(locale);
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},
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);
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}
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}
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