static bool Remove(ObservableList <TreeNode <TItem> > nodes, Predicate <TreeNode <TItem> > match)
{
var index = nodes.FindIndex(match);
if (index != -1)
{
nodes.RemoveAt(index);
return(true);
}
foreach (var node in nodes)
{
if (node.Nodes == null)
{
continue;
}
if (Remove(node.Nodes, match))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Recalculates the selected indices.
/// </summary>
/// <returns>The selected indices.</returns>
/// <param name="newItems">New items.</param>
protected override List <int> RecalculateSelectedIndices(ObservableList <ListNode <TItem> > newItems)
{
if (DeselectCollapsedNodes)
{
return(base.RecalculateSelectedIndices(newItems));
}
else
{
return(selectedNodes.Select <TreeNode <TItem>, int>(x => newItems.FindIndex(l => l.Node == x)).Where(x => x != -1).ToList());
}
}
/// <summary>
/// Recalculates the selected indices.
/// </summary>
/// <returns>The selected indices.</returns>
/// <param name="newItems">New items.</param>
protected override List <int> RecalculateSelectedIndices(ObservableList <ListNode <TItem> > newItems)
{
if (DeselectCollapsedNodes)
{
return(base.RecalculateSelectedIndices(newItems));
}
else
{
var indices = new List <int>();
foreach (var node in selectedNodes)
{
var index = newItems.FindIndex(l => l.Node == node);
if (index != -1)
{
indices.Add(index);
}
}
return(indices);
}
}
/// <summary>
/// Get indicies of specified nodes.
/// </summary>
/// <returns>The indicies.</returns>
/// <param name="targetNodes">Target nodes.</param>
protected List <int> Nodes2Indicies(IEnumerable <TreeNode <TItem> > targetNodes)
{
return(targetNodes.Select(x => NodesList.FindIndex(y => x == y.Node)).Where(i => i != -1).ToList());
}
