Navigating through a tree

Question

I have the following situation:
A user navigates through a tree.
- at some point the issue a command to add a new entry to the
tree.
- The back end responds with a new set of data (with the new
item added)
- I replace the trees data provider
- I want to scroll back to the node where the user initiated
the command.
I can find the node in the data provider collection that I
want to display,
but I can't get the tree to scroll to that point.
Any input or things to try would be appreciated.

Answer 1

Thanks for the reply. a few more details:
If the tree is large enough a scrollToIndex is required to
scroll the node into view.
In the example on cflex, I quadrupled the size of the tree
(to more closely match my application). When searching for a node
near the bottom node was expanded but not visible. So I added:
var idx:int = myTree.selectedIndex;
myTree.scrollToIndex(idx);
Also in my application I am replacing the dataprovider with a
new collection from the backend. So I also
needed to add: myTree.validateNow();
One more note: In the same tree I decided to implement a
search function to allow users
to find specific nodes. during expandNode I would
intermittantly get an ActionScript error.
We determined (with the help of Flex Support - thanks Peter)
that a call to validateNow() was
needed while iterating and expanding the parent tree nodes.