Hi,

I'm using NSTreeController to display an object graph in an outline view. The 
object graph is not CoreData based, this is a very simple model where each 
object represent a node and may have an array of children.

I do something very simple.

I create a root node and insert it to the tree controller content array.
I then create 20 children nodes and insert them in the root node.

Now come the funny part. If I remove an object from the model, the outline and 
the controller are properly updated, but removed NSTreeNode not always released.

First leak I encounter is when I delete a selected node. The selected node is 
never released (but NSTreeController's selection is properly updated though).
An other case where NSTreeNode are not released is when I expand my root item, 
and then delete it. Once again, controller and outline view contents are 
properly updated, but NSTreeNodes are not released.
The NSTreeController keep a references to the deleted nodes and release them 
only when it is destroyed (and do not reuse them as the count of living 
instances increase each time I create new nodes). 

Unfortunately I cannot rebuild my tree controller each time the user update the 
model.

Does somebody already coped with this problem ?

-- Jean-Daniel




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