🚀 go-pugleaf

HeaderViewer has a neat UI for flattening parts of its browser tree;
you can control-click on nodes with a tree of subnodes underneath, and
get a flattened version of the tree displayed there.  Very slick;
HeaderViewer is a shining gem of user interface design, IMHO.

But what I want to do in my app is control click on nodes which can be
LEAF nodes, and expand them.  See, each node in my tree has an array
associated with it, and I want to display the contents of the array
underneath the node in the browser.  If I control-click on the node, I
can have my browser:fillMatrix:inColumn: method change the node from
leaf to nonleaf, if necessary, but it's too late then; the NXBrowser
has already gotten the click and interpreted it as a click on a leaf
node.  I can't expand the node in the browser until the next mouse
click.

What I'd like would be a method like "performClickOnSelectedCell" that
I could send to the NXBrowser, or better yet, "expandSelectedCell".
Nothing resembling these facilities seem to be present.  Anybody have
ideas on how to fake it?

Thanks in advance.
-- 
jdawson@ccwf.cc.utexas.edu (John Dawson)