Variable windows: BLT or ???

[Keith Seitz <keiths at cygnus dot com>]

Hi,

Ok, so here we are. At long last, we are ready to whack tix from our
repository. This is the moment for which I've been waiting for a long,
long time. I'm sure Jim, Fernando, and Martin are equally happy to see us
come this far along.

Any way, in order to completely remove tix from our repository, we need to
have a solution for the variable windows. This is (and has been) the
biggest stumbling block for us whacking tix. We need some sort of
hierachial tree widget.

I see three options:

1) Pull in and update the "tree" widget that Source Navigator uses
2) Pull in BLT and use its hiertree widget.
3) Look for another alternative (including writing our own)

Having been through the SN tree widget, my inclination is to go with #2
right now, even though it will take some non-trivial effort (for me) to
upgrade BLT to build on cygwin.

Anyone have any comments on BLT, SN's tree widget, other alternatives?
Keith