private static void OnPropertyChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args)
{
if (args.Property == RepeatedIndexProperty)
{
var item = obj as TreeViewItem;
var indexPath = item.GetIndexPath();
if (item.SelectionModel != null)
{
item.IsSelected = IsRealized(indexPath) ? item.SelectionModel.IsSelectedAt(indexPath) : false;
}
AutomationProperties.SetLevel(item, indexPath.GetSize());
}
else
if (args.Property == SelectionModelProperty)
{
if (args.OldValue != null)
{
(args.OldValue as SelectionModel).PropertyChanged -= (obj as TreeViewItem).OnselectionModelChanged;
}
if (args.NewValue != null)
{
(args.NewValue as SelectionModel).PropertyChanged += (obj as TreeViewItem).OnselectionModelChanged;
}
}
}
