/// <summary>
/// Handles changes to the Hierarchy property.
/// </summary>
/// <param name="d">
/// The <see cref="DependencyObject"/> on which
/// the property has changed value.
/// </param>
/// <param name="e">
/// Event data that is issued by any event that
/// tracks changes to the effective value of this property.
/// </param>
private static void OnHierarchyChanged(
DependencyObject d, DependencyPropertyChangedEventArgs e)
{
HierarchicalDataTemplate oldHierarchy = (HierarchicalDataTemplate)e.OldValue;
HierarchicalDataTemplate newHierarchy = (HierarchicalDataTemplate)d.GetValue(HierarchyProperty);
//if (oldHierarchy != null)
// oldHierarchy.ClearValue(FrameworkElement.DataContextProperty);
//if (newHierarchy != null)
// newHierarchy.SetBinding(
// FrameworkElement.DataContextProperty,
// new Binding
// {
// Path = new PropertyPath("DataContext"),
// Source = d
// });
}
/// <summary>
/// Sets the Hierarchy property. This dependency property
/// indicates the hierarchical template extensions to use for data-bound hierarchical controls.
/// </summary>
public static void SetHierarchy(DependencyObject d, HierarchicalDataTemplate value)
{
d.SetValue(HierarchyProperty, value);
}