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SettingsScope with InheritedModel
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| /* | |
| * https://gist.github.com/PlugFox/320d051c5a393f56f60c3cf080d6171a | |
| * https://dartpad.dev/320d051c5a393f56f60c3cf080d6171a?null_safety=true | |
| */ | |
| import 'package:flutter/widgets.dart'; | |
| @immutable | |
| class SettingsScope extends StatefulWidget { | |
| final Widget child; | |
| const SettingsScope({ | |
| required this.child, | |
| Key? key, | |
| }) : super(key: key); | |
| static SettingsBLoC _blocOf(BuildContext context) => _InheritedSettings.stateOf(context).settingsBLoC; | |
| /// Обновить настройки приложения | |
| static void updateOf(BuildContext context, {required UserSettings settings}) => _blocOf(context).add( | |
| SettingsEvent.update( | |
| Provider.of<UserEntity>( | |
| context, | |
| listen: false, | |
| ), | |
| settings, | |
| ), | |
| ); | |
| /// Получить текущие настройки приложения | |
| static UserSettings settingsOf(BuildContext context, {bool listen = false}) => | |
| _InheritedSettings.of(context, listen: listen).settings; | |
| /// Получить и подписаться на текущую локаль приложения | |
| static String localeOf(BuildContext context) => _InheritedSettings.aspectOf(context, 'locale').locale; | |
| /// Получить и подписаться на текущую тему приложения | |
| static String themeOf(BuildContext context) => _InheritedSettings.aspectOf(context, 'theme').theme; | |
| @override | |
| State<StatefulWidget> createState() => _SettingsScopeState(); | |
| } | |
| class _SettingsScopeState extends State<SettingsScope> { | |
| UserEntity? _lastUserSettings; | |
| late SettingsBLoC settingsBLoC; | |
| @override | |
| void initState() { | |
| super.initState(); | |
| settingsBLoC = SettingsBLoC( | |
| repository: Provider.of<RepositoryStore>(context, listen: false).settingsRepository, | |
| ); | |
| } | |
| @override | |
| void didChangeDependencies() { | |
| super.didChangeDependencies(); | |
| final user = Provider.of<UserEntity>(context, listen: true); | |
| if (_lastUserSettings != user) { | |
| _lastUserSettings = user; | |
| settingsBLoC.add(SettingsEvent.getFromServer(user)); | |
| } | |
| } | |
| @override | |
| void dispose() { | |
| settingsBLoC.close(); | |
| super.dispose(); | |
| } | |
| @override | |
| Widget build(BuildContext context) => BlocBuilder<SettingsBLoC, SettingsState>( | |
| bloc: settingsBLoC, | |
| builder: (context, state) => _InheritedSettings( | |
| state: this, | |
| settings: state.settings, | |
| child: widget.child, | |
| ), | |
| ); | |
| } | |
| class _InheritedSettings extends InheritedModel<String> { | |
| final _SettingsScopeState state; | |
| final UserSettings settings; | |
| const _InheritedSettings({ | |
| required this.state, | |
| required this.settings, | |
| required Widget child, | |
| Key? key, | |
| }) : super(child: child, key: key); | |
| @override | |
| bool updateShouldNotify(covariant _InheritedSettings oldWidget) => oldWidget.settings != settings; | |
| @override | |
| bool updateShouldNotifyDependent(covariant _InheritedSettings oldWidget, Set<String> dependencies) => | |
| oldWidget.settings != settings && | |
| ((dependencies.contains('locale') && oldWidget.settings.locale != settings.locale) || | |
| (dependencies.contains('theme') && oldWidget.settings.theme != settings.theme)); | |
| static _InheritedSettings of(BuildContext context, {bool listen = false}) => listen | |
| ? context.dependOnInheritedWidgetOfExactType<_InheritedSettings>()! | |
| : (context.getElementForInheritedWidgetOfExactType<_InheritedSettings>()!.widget as _InheritedSettings); | |
| static UserSettings aspectOf(BuildContext context, String aspect) => | |
| InheritedModel.inheritFrom<_InheritedSettings>(context, aspect: aspect)!.settings; | |
| static _SettingsScopeState stateOf(BuildContext context) => of(context, listen: false).state; | |
| } |
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