Dynamic tree

[cuthbe]

All

I have a simple TreeGrid and I want to be able to dynamically create a parent node and then link children under that node when they are received from the server.

So when I receive a new event from the server I do the following

Step 1. Try and lookup the parent within the tree using the name field.

TreeNode parentNode = this.display.getTreeGrid().getData().find("Name", parentId);

If I can't find a parent there is not one in the tree so I create one

if(parentNode == null) {
     String nodeId = "RC:"+Random.nextDouble();
     parentNode = new ExecutionTreeNode(nodeId, "1", parentId);
     getDataSource().addData(parentNode);
     getTreeGrid().getData().add(parentNode, "1");
}

Then after that I try and add a child node to that parent

getTreeGrid().getData().add(childNode, parentNode);

Now the in the display I see the parent but the child record does not exist.
The only way I have been able to get this working is to create a predefined parent when the tree is build so something like

TreeNode node1 = new TreeNode("2", "1", "Parent");
getDataSource().addData(node1);

So 2 is the nodeId and 1 is what is should link to.

The I change all child nodes to link to id 2.

Is it possible to create a tree without a parent and dynamically create the parents?