41 lines
1.0 KiB
Dart
41 lines
1.0 KiB
Dart
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/// Theme switching service - singleton pattern matching OverheatMonitor
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///
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/// Manages dark/bright mode state and notifies listeners on change.
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/// Default is dark mode. Call setDarkMode() from sensor readings.
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class ThemeService {
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ThemeService._();
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static final instance = ThemeService._();
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bool _isDarkMode = true;
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final List<void Function()> _listeners = [];
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/// Current theme mode
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bool get isDarkMode => _isDarkMode;
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/// Set theme mode. Notifies listeners if changed.
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void setDarkMode(bool dark) {
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if (_isDarkMode == dark) return;
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_isDarkMode = dark;
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_notifyListeners();
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}
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/// Toggle between dark and bright
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void toggle() => setDarkMode(!_isDarkMode);
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/// Add a listener for theme changes
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void addListener(void Function() listener) {
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_listeners.add(listener);
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}
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/// Remove a listener
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void removeListener(void Function() listener) {
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_listeners.remove(listener);
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}
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void _notifyListeners() {
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for (final listener in _listeners) {
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listener();
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}
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}
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}
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