private void UnregisterItem(TreeViewItem item)
{
item.Expanded -= ExpandedChanged;
item.Collapsed -= ExpandedChanged;
foreach (var container in GetItems(item))
{
UnregisterItem(container);
}
}
private static IEnumerable <TreeViewItem> GetItems(TreeViewItem parent)
{
var item = TreeViewElementFinder.GetFirstVirtualizedItem(parent);
if (item == null)
{
yield break;
}
while (item != null)
{
yield return(item);
item = (TreeViewItem)TreeViewElementFinder.FindNextSibling(item);
}
}
private static bool IsParentOfItem(TreeViewItem item, IEnumerable <TreeViewItem> parentCandidates)
{
foreach (var parent in parentCandidates)
{
var current = item.ParentTreeViewItem;
while (current != null)
{
if (ReferenceEquals(current, parent))
{
return(true);
}
current = current.ParentTreeViewItem;
}
}
return(false);
}
private TreeViewItem GetTreeViewItem(string propertyPath)
{
IEnumerable <TreeViewItem> currentPropertyCollection = GetItems(AssociatedObject);
string[] members = propertyPath.Split('.');
TreeViewItem item = null;
foreach (var member in members.Skip(0))
{
item = currentPropertyCollection.FirstOrDefault(x => { var vm = x.DataContext as IChildViewModel; return(vm != null && GetName(vm) == member); });
if (item == null)
{
return(null);
}
currentPropertyCollection = GetItems(item);
}
return(item);
}