/// <summary>
/// Creates a node from the specified item.
/// </summary>
/// <param name="item">The item.</param>
/// <returns>The node.</returns>
private BindableTreeNode CreateNodeFromItem(object item)
{
BindableTreeNode node = new BindableTreeNode();
node.DataBinding += Node_DataBinding;
node.DataBound += Node_DataBound;
node.DataSource = item;
return(node);
}
/// <summary>
/// Gets the expande state of each child node in the specified node.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="expandedState">The expanded state of each node.</param>
private void GetExpandedState(BindableTreeNode node, Dictionary <Guid, bool> expandedState)
{
foreach (BindableTreeNode childNode in node.Nodes)
{
if (!expandedState.ContainsKey(childNode.ID) && childNode.Nodes.Count > 0)
{
expandedState.Add(childNode.ID, node.IsExpanded);
}
}
}
/// <summary>
/// Finds a node with the specified ID within the specified node.
/// </summary>
/// <param name="node">The node to search.</param>
/// <param name="id">The ID to find.</param>
private BindableTreeNode Find(BindableTreeNode node, Guid id)
{
BindableTreeNode foundNode = node.ID == id ? node : default(BindableTreeNode);
for (int nodeIndex = 0; nodeIndex < node?.Nodes.Count && foundNode == default(BindableTreeNode); nodeIndex++)
{
foundNode = Find((BindableTreeNode)node.Nodes[nodeIndex], id);
}
return(foundNode);
}
/// <summary>
/// Finds a node with the specified ID.
/// </summary>
/// <param name="id">The ID to find.</param>
public BindableTreeNode Find(Guid id)
{
BindableTreeNode node = default(BindableTreeNode);
for (int nodeIndex = 0; nodeIndex < Nodes.Count && node == default(BindableTreeNode); nodeIndex++)
{
node = Find((BindableTreeNode)Nodes[nodeIndex], id);
}
return(node);
}
/// <summary>
/// Sets the expanded state of each child node in the specified node.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="expandedState">The expanded state of each node.</param>
private void SetExpandedState(BindableTreeNode node, Dictionary <Guid, bool> expandedState)
{
if (expandedState.ContainsKey(node.ID))
{
if (expandedState[node.ID] && !node.IsExpanded)
{
node.Expand();
}
else if (expandedState[node.ID] && node.IsExpanded)
{
node.Collapse();
}
}
foreach (BindableTreeNode childNode in node.Nodes)
{
SetExpandedState(childNode, expandedState);
}
}
/// <summary>
/// Creates nodes for each item in the DataMember list.
/// </summary>
private void CreateNodes()
{
Dictionary <Guid, bool> initialState = GetExpandedState();
BeginUpdate();
Nodes.Clear();
foreach (object item in currencyManager.List)
{
BindableTreeNode node = new BindableTreeNode();
node.DataBinding += Node_DataBinding;
node.DataBound += Node_DataBound;
node.DataSource = item;
Nodes.Add(node);
}
SetExpandedState(initialState);
EndUpdate();
}
public NodeEventArgs(BindableTreeNode node)
{
Node = node;
}
