private static bool UpdateAppStyle(AppTheme selectedTheme)
{
if (selectedTheme == AppTheme.FollowSystem)
{
selectedTheme = (AppTheme)App.Current.RequestedTheme;
}
ResourceDictionary theme = selectedTheme switch
{
AppTheme.Dark => new DarkTheme(),
AppTheme.Light => new LightTheme(),
_ => throw new InvalidOperationException("Unsupported theme"),
};
ICollection <ResourceDictionary> resources = Application.Current.Resources.MergedDictionaries;
if (resources.FirstOrDefault()?.GetType() == theme.GetType())
{
return(false);
}
try
{
resources.Clear();
resources.Add(theme);
}
catch (Exception ex)
{
ExceptionService.LogException(ex);
}
return(true);
}
public static bool SetAppTheme()
{
AppTheme selectedTheme = SettingsRepository.Settings.Theme;
UpdateNativeStyle(selectedTheme);
UpdateAppStyle(selectedTheme);
MessagingCenter.Send(Application.Current, MessageTypes.ThemeChanged, selectedTheme);
return(true);
}
private static void UpdateNativeStyle(AppTheme selectedTheme)
{
NightModeStyle style = selectedTheme switch
{
AppTheme.Dark => NightModeStyle.Yes,
AppTheme.Light => NightModeStyle.No,
AppTheme.FollowSystem => NightModeStyle.FollowSystem,
_ => throw new InvalidOperationException("Unsupported theme"),
};
var nightModeManager = DependencyService.Get <INightModeManager>();
nightModeManager.DefaultNightMode = style;
}
