void dsbListItems_PerformSearch(object sender, PerformSearchEventArgs e)
{
if (chkRetainGroups.Checked)
{
foreach (ComboTreeNode node in dsbListItems.AllNormalNodes)
{
e.CancellationToken.ThrowIfCancellationRequested();
if (dsbListItems.DefaultSearchPredicate(node, e.SearchTerm))
{
// get all ancestor nodes (including the result)
Stack <ComboTreeNode> ancestors = new Stack <ComboTreeNode>();
ComboTreeNode current = node;
while (current != null)
{
ancestors.Push(current);
current = current.Parent;
}
// copy ancestor nodes into search results (or re-use existing)
ComboTreeNodeCollection collection = e.Results;
while (ancestors.Any())
{
current = ancestors.Pop();
ComboTreeNode copy = e.Results.Find(x => dsbListItems.DefaultEquivalencePredicate(x, current), true);
if (copy == null)
{
collection.Add(copy = current.Clone());
}
collection = copy.Nodes;
}
}
}
e.Handled = true;
}
}
