private static void OnIsShowingChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { var element = (UIElement)d; if (Equals(e.NewValue, true)) { var adorner = element.GetAdorner(); if (adorner == null) { adorner = new ContentAdorner(element); element.SetAdorner(adorner); } SetIfNotNull(d, ContentProperty, adorner, ContentAdorner.ContentProperty); SetIfNotNull(d, ContentTemplateProperty, adorner, ContentAdorner.ContentTemplateProperty); SetIfNotNull(d, ContentTemplateSelectorProperty, adorner, ContentAdorner.ContentTemplateSelectorProperty); SetIfNotNull(d, ContentPresenterStyleProperty, adorner, ContentAdorner.ContentPresenterStyleProperty); AdornerService.Show(adorner); } else { var adorner = element.GetAdorner(); if (adorner != null) { AdornerService.Remove(adorner); } element.ClearValue(AdornerProperty); } }
private static void SetIfNotNull( DependencyObject source, DependencyProperty sourceProperty, ContentAdorner adorner, DependencyProperty adornerProperty) { var value = source.GetValue(sourceProperty); if (value != null) { adorner.SetValue(adornerProperty, value); } }
private static void SetAdorner(this DependencyObject element, ContentAdorner value) { element.SetValue(AdornerProperty, value); }