/// <summary>
/// Copies tree from data to display.
/// Returns "bindings", mapping data->display (so, if you have data node, you can find it's counterpart on display)
///
/// filter method is called for each data node, and if returns false, display node is not created (and data children are not iterated)
/// updateAction is called for each newly created display node, first parameter is data node, second one is display node
/// </summary>
/// <returns></returns>
public static TreeNodeBindings CopyTree(TreeView data, TreeView display, Func <TreeNode, bool> filter, Action <TreeNode, TreeNode> updateAction)
{
var bindings = new TreeNodeBindings();
display.Nodes.Clear();
CopyTree(data.Nodes, display.Nodes, bindings,
filter ?? (_ => true),
updateAction ?? ((dataNode, displayNode) => { }));
return(bindings);
}
private static void CopyTree(TreeNodeCollection source, TreeNodeCollection target, TreeNodeBindings bindings, Func <TreeNode, bool> filter, Action <TreeNode, TreeNode> updateAction)
{
foreach (TreeNode node in source)
{
if (!filter(node))
{
continue;
}
TreeNode newNode;
if (node is TreeNodeWithConnectionInfo)
{
newNode = ((TreeNodeWithConnectionInfo)node).CloneShallow();
}
else
{
newNode = CloneShallow(node);
}
target.Add(newNode);
bindings.BindNodes(node, newNode);
CopyTree(node.Nodes, newNode.Nodes, bindings, filter, updateAction);
if (node.IsExpanded)
{
newNode.Expand();
}
updateAction(node, newNode);
}
}
