/// <summary>
/// Constructor
/// </summary>
/// <param name="targetNode">Target node that will be the parent of the new nodes</param>
protected AsyncNodeProvider(TreeNodeData targetNode)
{
lockObj = new object();
this.targetNode = targetNode;
dispatcher = Dispatcher.CurrentDispatcher;
uiThreadActions = new List <Action>();
cancellationTokenSource = new CancellationTokenSource();
cancellationToken = cancellationTokenSource.Token;
thread = new Thread(ThreadMethodImpl);
thread.IsBackground = true;
}
/// <summary>
/// Adds a new node
/// </summary>
/// <param name="node">New node</param>
protected void AddNode(TreeNodeData node)
{
if (node is null)
{
throw new ArgumentNullException(nameof(node));
}
lock (lockObj) {
nodesToAdd.Add(node);
if (nodesToAdd.Count == 1)
{
UI(AddNodes_UI);
}
}
}
/// <summary>
/// Gets the ancestor of a certain type
/// </summary>
/// <typeparam name="T">Desired type</typeparam>
/// <param name="self">This</param>
/// <returns></returns>
public static T GetAncestorOrSelf <T>(this TreeNodeData self) where T : TreeNodeData
{
while (self != null)
{
if (self is T found)
{
return(found);
}
var parent = self.TreeNode.Parent;
if (parent == null)
{
break;
}
self = parent.Data;
}
return(null);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="node">Node</param>
/// <param name="removed">true if it was removed</param>
public TreeViewNodeRemovedEventArgs(TreeNodeData node, bool removed)
{
Node = node;
Removed = removed;
}
/// <summary> /// Gets all descendants including itself /// </summary> /// <param name="self">This</param> /// <returns></returns> public static IEnumerable <TreeNodeData> DescendantsAndSelf(this TreeNodeData self) => self.TreeNode.DescendantsAndSelf().Select(a => a.Data);
