static void IdChangedEventManagerChanged(object sender, DependencyPropertyChangedEventArgs e)
{
DependencyObject Element = (DependencyObject)sender;
// Clear local path, so that parent value is inherited for this element
PersistentProperty.ReEvaluateIdPath(Element);
}
private static void NotifyChildrenThatIdPathChanged(DependencyObject element)
{
if (element is Visual || element is Visual3D)
{
for (int Index = 0; Index < VisualTreeHelper.GetChildrenCount(element); Index++)
{
DependencyObject Child = VisualTreeHelper.GetChild(element, Index);
if (Child.ReadLocalValue(PersistentProperty.IdPathProperty) != DependencyProperty.UnsetValue)
{
//there is a Context registered. this means, the context path must be re-evaluated.
//re-evaluation of children will be done in the called method
PersistentProperty.ReEvaluateIdPath(Child);
}
else
{
//no context is specified here, so check the children
PersistentProperty.NotifyChildrenThatIdPathChanged(Child);
}
}
}
}