internal static ITreeNodeData[] GetNodes(ITreeNodeData[] 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;
}
public override sealed bool CanDrag(ITreeNodeData[] nodes)
{
return Context.CanDragAndDrop && nodes.Length != 0 && nodes.All(a => a is IFileTreeNodeData && ((IFileTreeNodeData)a).TreeNode.Parent == Context.FileTreeView.TreeView.Root);
}