private static void OnVisibleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FrameworkElement adornedElement = d as FrameworkElement;
if (adornedElement == null)
{
throw new InvalidOperationException("Adorners can only be applied to elements deriving from FrameworkElement");
}
AdornerLayer layer = AdornerLayer.GetAdornerLayer(adornedElement);
if (layer == null)
{
throw new InvalidOperationException("Cannot show adorner since no adorner layer was found in the visual tree");
}
SmartAdorner adorner = GetAdorner(adornedElement);
bool isVisible = (bool)e.NewValue;
if (isVisible && adorner == null)
{
adorner = new SmartAdorner(adornedElement);
SetAdorner(adornedElement, adorner);
layer.Add(adorner);
}
else if (!isVisible && adorner != null)
{
layer.Remove(adorner);
SetAdorner(d, null);
}
}
private static void OnTemplateSelectorChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
SmartAdorner adorner = GetAdorner(d);
if (adorner != null)
{
adorner.TemplateSelector = (DataTemplateSelector)e.NewValue;
}
}
private static void SetAdorner(DependencyObject obj, SmartAdorner value)
{
obj.SetValue(AdornerProperty, value);
}
