/// <summary>
/// Convert nodes tree to list.
/// </summary>
/// <returns>The list.</returns>
/// <param name="sourceNodes">Source nodes.</param>
/// <param name="depth">Depth.</param>
/// <param name="list">List.</param>
protected virtual int Nodes2List(IObservableList <TreeNode <TItem> > sourceNodes, int depth, ObservableList <ListNode <TItem> > list)
{
var added_nodes = 0;
foreach (var node in sourceNodes)
{
if (!node.IsVisible)
{
continue;
}
list.Add(new ListNode <TItem>(node, depth));
if ((node.IsExpanded) && (node.Nodes != null) && (node.Nodes.Count > 0))
{
var used = Nodes2List(node.Nodes, depth + 1, list);
node.UsedNodesCount = used;
}
else
{
node.UsedNodesCount = 0;
}
added_nodes += 1;
}
return(added_nodes);
}