I'm trying to use tcl/tk for doing interactive graphics from the toplevel.
 And, lord help me, I'm trying to do it on cygwin.
My basic solution I came up with is this:  I have one thread doing all the
labltk calls.  That thread also polls a channel where it effectively picks
up RPC requests.  SO, when I want to draw something on the screen, I stuff
the appropriate function into the channel, the TclTk thread picks it up
and executes that function, and then sends back a response, at which point
the calling thread continues.
Anyway, it all seems well and good, but when I actually try to do it, for
some reason the i/o on the caml toplevel locks up.  So if I type:
# Graphing.init (); print_string "Hello World!\n";;
Hello World!
- : unit = ()
#

Graphing.init starts up the Tcl/Tk window as expected, and the print
works, also as expected.  But from that point on until I kill the Tcl/Tk
window, I can't get the toplevel to respond to keypresses.  It's as if the
Tcl/Tk thread has stolen stdin.  Does anyone know how to work around this?
y


-- 
|--------/            Yaron M. Minsky              \--------|
|--------\ http://www.cs.cornell.edu/home/yminsky/ /--------|

Open PGP --- KeyID B1FFD916 (new key as of Dec 4th)
Fingerprint: 5BF6 83E1 0CE3 1043 95D8 F8D5 9F12 B3A9 B1FF D916



-------------------
To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr
Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/
Beginner's list: http://groups.yahoo.com/group/ocaml_beginners