77 lines
1.8 KiB
Dart
77 lines
1.8 KiB
Dart
import 'package:blog_app/utils/theme_utils.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 ThemeProvider with ChangeNotifier {
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static const String _themeKey = 'selected_theme';
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static const String _darkModeKey = 'is_dark_mode';
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bool isDarkMode = false;
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ThemeColor currentTheme = defaultThemes[0];
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late SharedPreferences _prefs;
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bool isInitialized = false;
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ThemeProvider() {
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_initPreferences();
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}
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// 初始化 SharedPreferences
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Future<void> _initPreferences() async {
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_prefs = await SharedPreferences.getInstance();
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_loadPreferences();
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isInitialized = true;
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notifyListeners();
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}
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// 加载存储的设置
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void _loadPreferences() {
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isDarkMode = _prefs.getBool(_darkModeKey) ?? false;
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// 加载主题色
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final themeName = _prefs.getString(_themeKey);
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if (themeName != null) {
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currentTheme = getThemeColor(themeName);
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}
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}
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// 保存主题色
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Future<void> _saveTheme() async {
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await _prefs.setString(_themeKey, currentTheme.name);
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}
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// 保存暗黑模式
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Future<void> _saveDarkMode() async {
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await _prefs.setBool(_darkModeKey, isDarkMode);
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}
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List<ThemeColor> get availableThemes => defaultThemes;
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// 切换明暗模式
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void toggleDarkMode(bool value) {
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isDarkMode = value;
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_saveDarkMode();
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notifyListeners();
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}
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// 更改主题色
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void changeTheme(ThemeColor theme) {
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currentTheme = theme;
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_saveTheme();
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notifyListeners();
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}
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ThemeData get currentThemeData {
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return ThemeData(
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primarySwatch: currentTheme.materialColor,
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colorScheme: ColorScheme.fromSeed(
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seedColor: currentTheme.primaryColor,
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brightness: isDarkMode ? Brightness.dark : Brightness.light,
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),
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useMaterial3: true,
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fontFamily: 'CustomFont',
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);
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}
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}
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