Tree.openFolder() Doesn't Appear To Work

[ccocco]

I was hoping to force a folder TreeNode to open when a user single-clicks it, by calling Tree.openFolder(TreeNode) which in turn would dispatch a onFolderOpened() event but this does not seem to work. My test case below does call the openFolder() method on a single click but I never receive the onFolderOpened(). Should this work or am I interpreting it incorrectly? Thanks!

    class TreeNodeClickHandler implements CellClickHandler
    {
        protected IMODTreeGrid treeGrid;
        
        public TreeNodeClickHandler(IMODTreeGrid treeGrid)
        {
            this.treeGrid = treeGrid;
        }
        
        public void onCellClick(CellClickEvent event)
        {
            System.out.println("onCellClick() called...");
            
            if (event.getRecord() instanceof IMODTreeNode)
            {
                IMODTreeNode treeNode = (IMODTreeNode) event.getRecord();
                
                if (treeGrid.getData().isFolder(treeNode) && !treeGrid.getData().isOpen(treeNode))
                {
                    treeGrid.getData().openFolder(treeNode);
                }
            }
        }
    }

    class TreeNodeFolderOpenedHandler implements FolderOpenedHandler
    {
       protected IMODTreeGrid treeGrid;
        
        public TreeNodeFolderOpenedHandler(IMODTreeGrid treeGrid)
        {
            this.treeGrid = treeGrid;
        }
        
        public void onFolderOpened(FolderOpenedEvent event)
        {
            System.out.println("onFolderOpened() called...");
            
            if (event.getNode() instanceof IMODTreeNode)
            {
                expandFolder(treeGrid, (IMODTreeNode) event.getNode(), false);
            }
        }
    }