private static void OnIsValidationScopeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var fe = d as FrameworkElement;
if (fe == null)
{
return;
}
if (Equals(e.NewValue, true))
{
var proxy = fe.GetValue(ValidationProxyProperty);
if (proxy == null)
{
proxy = new ValidationProxy(fe);
fe.SetValue(ValidationProxyProperty, proxy);
}
var proxyCollection = new ErrorProxyCollection();
d.SetErrorProxies(proxyCollection);
AddErrorHandler(fe, OnError);
}
else
{
var proxy = (ValidationProxy)fe.GetValue(ValidationProxyProperty);
if (proxy != null)
{
proxy.Dispose();
}
var collection = d.GetErrorProxies();
if (collection != null)
{
collection.Dispose();
}
d.SetErrorProxies(null);
RemoveErrorHandler(fe, OnError);
}
}
public static void SetErrorProxies(this DependencyObject element, ErrorProxyCollection value)
{
element.SetValue(ErrorProxiesPropertyKey, value);
}
