Jisho-Study-Tool/lib/view/components/search/language_selector.dart

78 lines
1.8 KiB
Dart

import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
class LanguageSelector extends StatefulWidget {
const LanguageSelector();
@override
_LanguageSelectorState createState() => new _LanguageSelectorState();
}
class _LanguageSelectorState extends State<LanguageSelector> {
late final SharedPreferences prefs;
late List<bool> isSelected;
@override
void initState() {
super.initState();
isSelected = [false, false, false];
SharedPreferences.getInstance()
.then((prefs) {
this.prefs = prefs;
setState(() {
isSelected = _getSelectedStatus() ?? isSelected;
});
});
}
void _updateSelectedStatus() async {
await prefs.setStringList('languageSelectorStatus',
isSelected
.map((b) => b ? '1' : '0')
.toList());
}
List<bool>? _getSelectedStatus() {
return prefs
.getStringList('languageSelectorStatus')
?.map((s) => s == '1')
.toList();
}
@override
Widget build(BuildContext context) {
return ToggleButtons(
isSelected: isSelected,
children: <Widget> [
_LanguageOption("Auto"),
_LanguageOption("日本語"),
_LanguageOption("English")
],
selectedColor: Colors.blue,
onPressed: (int buttonIndex) {
setState(() {
for (var i in Iterable.generate(isSelected.length)) {
isSelected[i] = i == buttonIndex;
}
_updateSelectedStatus();
});
},
);
}
}
class _LanguageOption extends StatelessWidget {
final String language;
const _LanguageOption(this.language);
@override
Widget build(BuildContext context) {
return Container(
padding: EdgeInsets.symmetric(vertical: 10.0, horizontal: 20.0),
child: Center(child: Text(language)),
);
}
}