/// <summary>
/// Sets the first visible node in the tree. Clears all nodes if not empty.
/// </summary>
/// <param name="node"></param>
public void SetTopNode(DataViewNode node)
{
// clear nodes if not empty
if (Nodes.Count != 0)
{
Nodes.Clear();
}
// initialize its view as it will be the first visible node
node.InitializeView();
// add top node
Nodes.Add(node);
}
public void ExpandNode(DataViewNode viewModel)
{
// check if the first child node is a dummy node
if (viewModel.Nodes.Count > 0 && viewModel.Nodes[0].Text.Length == 0)
{
// initialize the view so the user doesn't get to see the dummy node
viewModel.InitializeView(true);
}
foreach (DataViewNode childNode in viewModel.Nodes)
{
if (childNode.Nodes.Count == 0 && childNode.NodeFlags.HasFlag(DataViewNodeFlags.Branch))
{
// HACK: add a dummy node for each branch
// so the expand icon shows up even when a node hasn't initialized yet
childNode.Nodes.Add(new TreeNode());
}
}
}
