private static void ReEvaluateIdPath(DependencyObject element)
{
PersistentProperty.ClearIdPath(element);
//Get (inherited) parent path
string ParentIdPath = PersistentProperty.GetIdPath(element);
string Id = PersistentProperty.GetId(element);
if (Id != null)
{
//Compute and set new path
PersistentProperty.SetIdPath(element, ParentIdPath != null ? $"{ParentIdPath}.{Id}" : Id);
}
PersistentProperty.NotifyChildrenThatIdPathChanged(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);
}
}
}
}