/// <summary>
/// Registers an event sink for <see cref="AppearanceManager"/> to weakly handle its events.
/// </summary>
/// <param name="manager"></param>
/// <param name="eventSink"></param>
public static void RegisterEventSink(this AppearanceManager manager, IAppearanceManagerEventSink eventSink)
{
if (manager == null)
{
throw new ArgumentNullException(nameof(manager));
}
if (eventSink == null)
{
throw new ArgumentNullException(nameof(eventSink));
}
AppearanceManager.AccentColorChanged += new WeakEventHandler <IAppearanceManagerEventSink, object, object, EventArgs>(eventSink)
{
Handle = (t, o, e) => t.OnAccentColorChanged(o, e),
Detach = (h, m) => AppearanceManager.AccentColorChanged -= h.OnEvent
}.OnEvent;
AppearanceManager.SystemAccentColorChanged += new WeakEventHandler <IAppearanceManagerEventSink, object, object, EventArgs>(eventSink)
{
Handle = (t, o, e) => t.OnSystemAccentColorChanged(o, e),
Detach = (h, m) => AppearanceManager.SystemAccentColorChanged -= h.OnEvent
}.OnEvent;
manager.ThemeChanged += new WeakEventHandler <IAppearanceManagerEventSink, AppearanceManager, object, EventArgs>(eventSink)
{
Handle = (t, o, e) => t.OnThemeChanged(o, e),
Detach = (h, m) => m.ThemeChanged -= h.OnEvent
}.OnEvent;
}
/// <summary>
/// Gets the appearance manager for the current window (app view).
/// </summary>
/// <returns></returns>
public static AppearanceManager GetForCurrentView()
{
var root = Window.Current?.Content?.GetAncestorsAndSelf().OfType <FrameworkElement>().Last();
if (root == null)
{
return(null);
}
var manager = (AppearanceManager)root.GetValue(AppearanceManagerProperty);
if (manager == null)
{
manager = new AppearanceManager(root);
root.SetValue(AppearanceManagerProperty, manager);
}
return(manager);
}
/// <summary>
/// Gets the appearance manager for the current window (app view).
/// </summary>
/// <returns></returns>
public static AppearanceManager GetForCurrentView()
{
var root = Window.Current?.Content?.GetAncestorsAndSelf().OfType<FrameworkElement>().Last();
if (root == null) {
return null;
}
var manager = (AppearanceManager)root.GetValue(AppearanceManagerProperty);
if (manager == null) {
manager = new AppearanceManager(root);
root.SetValue(AppearanceManagerProperty, manager);
}
return manager;
}
