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);
}
