Expand item in NSOutlineView

FROM : Alain Schartz
DATE : Fri Aug 31 10:52:59 2007

Hello List,

Can someone tell me how to expand the root node in an NSOutlineView (bound to an NSTreeController, managing entities) ?

With "rootNode" being the topmost NSManagedObject in the hierarchy (i.e. having a "parent == nil" predicate), [treeView expandItem: [treeView rootNode]] simply does nothing and I think I'm missing out one something basic here...

Thanks in advance for any helpful input !
Alain