33 lines
1.0 KiB
Dart
33 lines
1.0 KiB
Dart
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// lib/core/theme_manager.dart
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import 'package:flutter/material.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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class ThemeManager {
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ThemeManager._();
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static const String _prefKey = 'is_dark_mode';
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static final ValueNotifier<ThemeMode> themeMode = ValueNotifier(ThemeMode.light);
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/// Call during app startup to load saved preference.
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static Future<void> init() async {
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final prefs = await SharedPreferences.getInstance();
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final isDark = prefs.getBool(_prefKey) ?? false;
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themeMode.value = isDark ? ThemeMode.dark : ThemeMode.light;
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}
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/// Set theme and persist
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static Future<void> setThemeMode(ThemeMode mode) async {
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themeMode.value = mode;
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final prefs = await SharedPreferences.getInstance();
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await prefs.setBool(_prefKey, mode == ThemeMode.dark);
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}
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static bool get isDark => themeMode.value == ThemeMode.dark;
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/// Toggle helper
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static Future<void> toggle() async {
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final newMode = themeMode.value == ThemeMode.dark ? ThemeMode.light : ThemeMode.dark;
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await setThemeMode(newMode);
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}
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}
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