Re: GUI, Tk, with-wish

[Giuseppe Attardi <attardi@DI.Unipi.IT>]

I had started working on an interface between CL and Tk.
It is based on the ideas of STklos, except it is for real CLOS and CL.
I also replaced completely TCL with Lisp.
This was working for Tk 3.6, then a new release was announced that
promised to be less interpreter independent.
Tk 4.0 however moved more stuff to TCL, so I was discouraged to continue.
Anyhow, the code is available in the current ECL distribution:

	ftp://ftp.di.unipi.it/pub/lang/lisp/ecl-0.26.tar.gz

Even though Tk and CL run in the same process, there is no
problem in dealing with redraw when Lisp is waiting for read:
this is done through a change in the readc primitive used by ECL,
which checks for the presence of events, before taking input from
the stream. Look at the code for the 8 queens problem (in file
ecl/src/tk/Demos/queen.lsp).
The advantage is that you can pass real Lisp expressions (or even closures) to
Tk for use as callbacks.

-- Beppe