comunicmobile/lib/ui/routes/settings/application_settings.dart

import 'package:comunic/helpers/preferences_helper.dart';
import 'package:comunic/ui/widgets/async_screen_widget.dart';
import 'package:comunic/utils/intl_utils.dart';
import 'package:comunic/utils/ui_utils.dart';
import 'package:flutter/material.dart';
import 'package:settings_ui/settings_ui.dart';

/// Application settings
///
/// @author Pierre Hubert

class ApplicationSettings extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(tr("Application settings"))),
      body: _ApplicationSettingsScreen(),
    );
  }
}

class _ApplicationSettingsScreen extends StatefulWidget {
  @override
  __ApplicationSettingsScreenState createState() =>
      __ApplicationSettingsScreenState();
}

class __ApplicationSettingsScreenState
    extends State<_ApplicationSettingsScreen> {
  PreferencesHelper _preferencesHelper;

  Future<void> _refresh() async {
    _preferencesHelper = await PreferencesHelper.getInstance();
  }

  @override
  Widget build(BuildContext context) => AsyncScreenWidget(
      onReload: _refresh,
      onBuild: _buildSections,
      errorMessage: tr("Could not load settings!"));

  Widget _buildSections() {
    return SettingsList(
      sections: [_buildAppearanceSection(), _buildGeneralSection()],
    );
  }

  /// Appearance section
  SettingsSection _buildAppearanceSection() => SettingsSection(
        title: tr("Appearance"),
        tiles: [
          _PreferencesSettingsTile(
            preferencesKey: PreferencesKeyList.ENABLE_DARK_THEME,
            title: tr("Enable dark theme"),
            subtitle: null,
            onChange: _updatedSettings,
            helper: _preferencesHelper,
          ),
        ],
      );

  /// General section
  SettingsSection _buildGeneralSection() => SettingsSection(
        title: tr("General"),
        tiles: [
          SettingsTile(
            title: tr("About this application"),
            subtitle: tr("Learn more about us"),
            onTap: () => showAboutAppDialog(context),
          )
        ],
      );

  /// Apply new settings
  _updatedSettings() {
    setState(() {});
  }
}

class _PreferencesSettingsTile extends SettingsTile {
  final PreferencesKeyList preferencesKey;
  final String title;
  final String subtitle;
  final Function onChange;
  final PreferencesHelper helper;

  const _PreferencesSettingsTile({
    @required this.preferencesKey,
    @required this.title,
    @required this.subtitle,
    @required this.onChange,
    @required this.helper,
  });

  @override
  Widget build(BuildContext context) {
    return SettingsTile.switchTile(
      title: title,
      subtitle: subtitle,
      onToggle: _doChange,
      switchValue: helper.getBool(preferencesKey),
    );
  }

  void _doChange(bool value) async {
    await helper.setBool(preferencesKey, value);
    onChange();
  }
}