I had this problem in the tasklist module that
collapsed node trees would sometimes reexpand when
other parts of the node tree were updated. This
makes it really hard to use - you want to look at
a later part in the tree, but the top part (which
you had collapsed) keeps expanding and hiding

I've tracked it down and believe the problem is in
TreeTable.java, specifically 
org.openide.explorer.view.TreeTable$1.treeNodesRemoved(TreeTable.java:426)


        protected TreeModelListener
createTreeModelListener() {
            return new JTree.TreeModelHandler() {
                public void
treeNodesRemoved(TreeModelEvent e) {
                    tree.setSelectionPath
(TreeView.findSiblingTreePath (e.getTreePath (),
e.getChildIndices ()));
                }
            };
        }

Note that the above code is called for ALL deleted
nodes that are visible - not when the selected
node is deleted.

Note also that setSelectionPath is documented to
expand nodes as necessary.

So, after doing some document deletions,
findSibling goes into a neighbor tree and expands it.


I think the above code is an attempt to select the
"next" element when the node that is selected is
deleted - but that doesn't currently happen - so
the above code doesn't achieve that.

What it -does- however achieve is to expand
collapsed nodes, something the user does not want.

I commented out this code, and things work much
better in the tasklist module.

Are there any scenarios in netbeans the above is
serving - if so, what are they?  If not, can I
request that the above is removed?