/// <summary>
		/// Returns true if the nodes can be dragged
		/// </summary>
		/// <param name="nodes">Nodes</param>
		/// <returns></returns>
		public sealed override bool CanDrag(TreeNodeData[] nodes) =>
			Context.CanDragAndDrop && nodes.Length != 0 &&
			nodes.All(a => a is DocumentTreeNodeData &&
			((DocumentTreeNodeData)a).TreeNode.Parent == Context.DocumentTreeView.TreeView.Root);
Exemple #2
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		internal static TreeNodeData[] GetNodes(TreeNodeData[] nodes) {
			if (nodes == null)
				return null;
			if (nodes.Length == 0 || !nodes.All(a => a.TreeNode.Parent != null && a.TreeNode.Parent.Parent == null))
				return null;
			return nodes;
		}