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[Wolfgang Lindner <address@hidden>]

Thanks for your hints and links, Max.

I will follow your advice with great interest.

PS: I like TeXmacs and the possibility to run programs like Maxima, Octave, Pari, Macauly, Scheme etc. in it very much.

Thanks for all wizzards, who develop this nice piece of software.

Wolfgang

--

Am 12.12.2022 um 17:07 schrieb Massimiliano Gubinelli <address@hidden>:

TeXmacs/Guile can interact with the user via popup windows in the UI. Please give a look at the files

$TEXMACS_PATH/progs/kernel/texmacs/tm-dialogue.scm

where you have functions like the following:

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; Questions with user interaction

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(define-public (user-ask prompt cont)

  (tm-interactive cont

    (if (string? prompt)

        (list (build-interactive-arg prompt))

        (list prompt))))

(define-public (user-confirm prompt default cont)

  (let ((k (lambda (answ) (cont (yes? answ)))))

    (if default

        (user-ask (list prompt "question" (translate "yes") (translate "no")) k)

        (user-ask (list prompt "question" (translate "no") (translate "yes")) k))))

(define-public (user-url prompt type cont)

  (user-delayed (lambda () (choose-file cont prompt type))))

(define-public (user-delayed cont)

  (exec-delayed cont))

they work via continuations, so you will have to rewrite a bit your program.

Also you can create full-fedged widgets, look for example the file

$TEXMACS_PATH/progs/kernel/gui/tm-menu-test.scm

Best

Max

On 12 Dec 2022, at 15:11, Wolfgang Lindner <address@hidden> wrote:

Hi group,

Currently I work through the book of G Springer about Scheme using TeXmacs/Guile.

Until ch. 5 there were no problems and all programs run like a charm.

Now in Ch.6 about input/output I run into problems.

Here is a typical one.

;------------------------------------------------------------------

; - Program 6.6, pg. 174 -

(define read-demo

  (lambda ()

    (display "Enter data (enter done when finished): ")

    (let ((response (read)))

      (cond

        ((eq? response 'done) (display "Thank you. Good-bye."))

        (else (display "You entered: ")

              (write response)

              (newline)

              (read-demo))))))

; - End Program -

;------------------------------------------------------------------

Is it possible to use Texmacs-Guile interactive?

I know: use ‚format ..' instead of write/display ..

But what to do with (read) ??

How to work with user input and output?

Any hints or making the program about working are very welcome-

Best, Wolfgang

----
Dr. Wolfgang Lindner
Leichlingen, Germany
send from my iMac