mailing-list for TeXmacs Users

[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