51 lines
1.1 KiB
Dart
51 lines
1.1 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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class ThemeProvider extends ChangeNotifier {
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final SharedPreferences _prefs;
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static const String _themeKey = 'theme_mode';
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ThemeMode _themeMode = ThemeMode.system;
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ThemeMode get themeMode => _themeMode;
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ThemeProvider(this._prefs) {
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_loadTheme();
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}
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void _loadTheme() {
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final themeString = _prefs.getString(_themeKey);
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switch (themeString) {
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case 'light':
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_themeMode = ThemeMode.light;
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break;
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case 'dark':
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_themeMode = ThemeMode.dark;
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break;
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default:
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_themeMode = ThemeMode.system;
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break;
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}
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}
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Future<void> setThemeMode(ThemeMode mode) async {
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if (mode == _themeMode) return;
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_themeMode = mode;
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notifyListeners();
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String themeString;
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switch (mode) {
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case ThemeMode.light:
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themeString = 'light';
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break;
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case ThemeMode.dark:
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themeString = 'dark';
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break;
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case ThemeMode.system:
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default:
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themeString = 'system';
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break;
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}
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await _prefs.setString(_themeKey, themeString);
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}
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}
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