🚀 go-pugleaf

I'm trying to get a pretty complicated hypertext system I wrote under
InterViews 2.6 to work with 3.0.1, and having lots of problems.  I've now
getting everything to compile, but I can't get past displaying an empty window
frame, the crashing.

As far as I can tell, the basic problem is that my code relies on the canvas
being set for reshaping/resizing a scene prior to drawing.  And the canvas
is staying nil, even after I've done a World::InsertApplication(), and a
GetTopLevelWindow()->map().

Can anyone make any suggestions about what I might doing wrong, or how I could
fix things?  Is there any way to make sure that a canvas gets mapped, or an
alternative way of getting the geometry of particular components of a scene?
(Do these questions make sense?  I wrote this code a couple years ago, and I
don't yet remember too well how InterViews works.)  Unfortunately, I don't have
the time to rewrite the system completely for IV 3.0.

Thanks in advance.

Mike Schiff
schiff@cs.berkeley.edu