On 27 Oct 2006 22:58:14 +0200, Nicolas Neuss <neuss@math.uka.de> wrote:

Hello LTK users,

As a complete GUI programming newbie I wanted to try LTK, but immediately
have several questions:

1. Are there any example programs using LTK?

Last I looked, there was a substantial little demo at the end of the source file. may have been called ltktest. That even has something pretty close to what you are trying to do (and a lot more).

2. I don't know anything about Tk, unfortunately. Is there some tutorial
to GUI programming with Tk?

Just go to the Tcl/Tk site and you'll find quite a lot of info.

3. My current goal is to have a small window which displays a new random
   number whenever I press a button.  I thought about using
   message/textvariable in the following code snippet:

(defun zufallszahl ()
  (with-ltk ()
    (let* ((x "0")
       (f (make-instance 'frame))
       (text (make-instance 'message :text x :width 100))
       (button (make-instance 'button
                  :master f
                  :text "Next"
                  :command (lambda ()
                     (setq x (format nil "~D" (random 10)))))))
      (pack f)
      (pack text :side :top)
      (pack button :side :bottom)
      (configure f :borderwidth 3)
      (configure f :relief :sunken)
      )))

Unfortunately, (make-instance 'message :textvariable x :width 100) does not
work.  Is this a bug?

4. How can I put the message above the button?  I tried several
   combinations of :side XXX, none did achieve it.

5. How can I change the text of the message into something larger?

Thank you very much for any hints,

I think I see quite a few problems (and my LTk is rusty) so I will defer to others. In the meantime you might start over with ltktest.

kt