protected override IEnumerable <IDisposable> Initialize()
{
// Content
_appBarButtonWrapper = new AppBarButtonWrapper();
if (Element.Content is FrameworkElement content && content.Visibility == Visibility.Visible)
{
var elementsParent = Element.Parent;
_appBarButtonWrapper.SetParent(elementsParent);
}
yield return(Disposable.Create(() => _appBarButtonWrapper = null));
yield return(Element.RegisterDisposableNestedPropertyChangedCallback(
(s, e) => Invalidate(),
new[] { AppBarButton.LabelProperty },
new[] { AppBarButton.IconProperty },
new[] { AppBarButton.IconProperty, BitmapIcon.UriSourceProperty },
new[] { AppBarButton.ContentProperty },
new[] { AppBarButton.ContentProperty, FrameworkElement.VisibilityProperty },
new[] { AppBarButton.OpacityProperty },
new[] { AppBarButton.ForegroundProperty },
new[] { AppBarButton.ForegroundProperty, SolidColorBrush.ColorProperty },
new[] { AppBarButton.ForegroundProperty, SolidColorBrush.OpacityProperty },
new[] { AppBarButton.VisibilityProperty },
new[] { AppBarButton.IsEnabledProperty },
new[] { AppBarButton.IsInOverflowProperty }
));
Native.Clicked += OnNativeClicked;
yield return(Disposable.Create(() => { Native.Clicked -= OnNativeClicked; }));
}
