Client side Validation for Drag Drop in Radtreeview

[chithuraj]

Hi,
I have a radtreeview which is having 3 nodes say for example,

There are 3 parent nodes namely A,B,C each having 4 child nodes, I am doing client site drag and drop what ever mentioned in telerik demo.
My problem is the child nodes in parent node A should not be drag and drop to Parent node B.
Again parent node A should not be drag and drop to any other child nodes of B or C.

Here is my code what i am doing for drag and drop on client side:

function onNodeDragging(sender, args)
            {
                var target = args.get_htmlElement();

                if(!target) return;

                if (target.tagName == "INPUT")
                {
                    target.style.cursor = "hand";
                }
            }

            function onNodeDropping(sender, args)
            {
                var dest = args.get_destNode();
                if (dest)
                {
                    clientSideEdit(sender, args);
                    args.set_cancel(true);
                    return;
                    dropOnTree(args);
                }
            }

            function dropOnTree(args)
            {
                var text = "";

                if(args.get_sourceNodes().length)
                {
                    var i;
                    for(i=0; i < args.get_sourceNodes().length; i++)
                    {
                        var node = args.get_sourceNodes()[i];
                        texttext = text + ', ' +node.get_text();
                    }
                }
            }

            function clientSideEdit(sender, args)
            {
             var destinationNode = args.get_destNode();
             if(destinationNode)
             {
                    var firstTreeView = $find("<%=RadTreeView1.ClientID %>");
                    firstTreeView.trackChanges();
                    var sourceNodes = args.get_sourceNodes();
                    for (var i = 0; i < sourceNodes.length; i++)
                    {
                       var sourceNode = sourceNodes[i];
                       sourceNode.get_parent().get_nodes().remove(sourceNode);
                        if(args.get_dropPosition() == "over")
                        { destinationNode.get_nodes().add(sourceNode);}   return GenerateNodesAsXML();
                          if(args.get_dropPosition() == "above")     insertBefore(destinationNode, sourceNode);
                            if(args.get_dropPosition() == "below")     insertAfter(destinationNode, sourceNode);
                    }
                   destinationNode.set_expanded(true);
                   firstTreeView.commitChanges();
             }
            }

            function insertBefore(destinationNode, sourceNode)
            {
             var destinationParent = destinationNode.get_parent();
             var index = destinationParent.get_nodes().indexOf(destinationNode);
             destinationParent.get_nodes().insert(index, sourceNode);

             return GenerateNodesAsXML();
            }

            function insertAfter(destinationNode, sourceNode)
            {
             var destinationParent = destinationNode.get_parent();
             var index = destinationParent.get_nodes().indexOf(destinationNode);
             destinationParent.get_nodes().insert(index+1, sourceNode);

             return GenerateNodesAsXML();
            }

Please help me on this

Any help will be appreciated.

Thanks in advance.
Vinod

[Robert]

Vinod,

I have a similar predicament and have tried several approaches to show the user which nodes (and spaces in between nodes) he can drop a dragged node onto.  But it appears impossible (or insanely unwieldy) with the current version of the RadTreeView.

Robert