private static void OnSynchronizedSelectedItemsChanged(DependencyObject dependencyObject,
DependencyPropertyChangedEventArgs e)
{
if (e.OldValue != null)
{
var synchronizer = GetSynchronizationManager(dependencyObject);
synchronizer.StopSynchronizing();
SetSynchronizationManager(dependencyObject, null);
}
var list = e.NewValue as IList;
var selector = dependencyObject as Selector;
if (list != null && selector != null)
{
var synchronizer = GetSynchronizationManager(dependencyObject);
if (synchronizer == null)
{
synchronizer = new SynchronizationManager(selector);
SetSynchronizationManager(dependencyObject, synchronizer);
}
synchronizer.StartSynchronizingList();
}
}
private static void SetSynchronizationManager(DependencyObject dependencyObject, SynchronizationManager value)
{
dependencyObject.SetValue(_synchronizationManagerProperty, value);
}
