Expanded node and children are seen only after second expansion

Hi,
I am using a simple JTree control. I am populating children of nodes dynamically when the node is expanded. For this, I first add a "dummy" item for each node under the root, so that the "+" sign appears next to the node. When a node is expanded, I delete the "dummy" node and add children to it. However, the first time I expand the node, the node actually doesn't expand, though treeExpanded() gets called and all children are added correctly (I verified by debugging). When I expand the tree the second time, I can see the expanded node.
I am using TreeModel's removeNodeFromParent(childNode) and insertNodeInto(childNode, parentNode, childIndex) method to remove and add children respectively.I believe we don't have to explicitly call TreeModel's nodeChanged(), nodesWereInserted() etc?
Could you please let me know if I am missing something fundamental here?
Thanks in advance,
Praneeth

Hi db,
I didn't realize that there was a response to my earlier thread. I added the thread to my watchlist. I was under the impression that I would be notified via email in case of a reply to the thread. However, I didn't receive any. Anyway, I did reply to that response there now.

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Expanded node and children are seen only after second expansion

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