Re: [Chicken-users] callbacks returning twice

[Matt Welland]

Hi Jörg,

I've been using IUP for quite a while and I don't recall seeing the message "callback returned twice". Perhaps it is something with the newer version of IUP you appear to be using. I would be interested to know if it works with chicken-iup? My virtualbox install seems to have broken in some recent upgrade and I have no access to Windows to try it myself. I can't run your code on Linux as my install of iup is probably too old:

> csc iuprep.scm

Warning: reference to possibly unbound identifier `gridbox'

Error: module unresolved: ask-repl

Error: shell command terminated with non-zero exit status 256: '/mfs/pkgs/chicken/4.9.0.1_for_14.04/bin/chicken' 'iuprep.scm' -output-file 'iuprep.c'

I was curious to see what I could learn from your code but unfortunately it is appears beyond my current skill level and is mostly incomprehensible to me. I'll keep trying :)

Matt
-=-

BTW: chicken-iup is at www.kiatoa.com/fossils/chicken-iup

On Thu, Jun 25, 2015 at 2:54 PM, "Jörg F. Wittenberger" <address@hidden> wrote:

Hi all,

for a couple of days I've been looking into iup for chicken.  This is
close to the best thing since sliced bread in a way.

Except that it crashes all the time.  "callback returned twice"

So what's the recipe to hit that problem?

(The code is fairly trivial; I'm just exploring.  Actually I was about
to ask "what I'm doing there in the first module is so basic textbook
stuff, which egg do I actually want to use instead of mimicking it
here?" - It registers some callbacks around data to propagate updates to
the gui elements.)

Thanks for any suggestions.

/Jörg

(I attach my code here for reference.  Just in case.  It really does not
too much; the second and third tab are only useful in connection with a
server, just the first one usable out of the box.  Not much different to
csi, just with a gui.)

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