ltk-user December 2009

ltk-user@common-lisp.net

7 participants
2 discussions

[ltk-user] get noticed when the scale is changed
by Martin Kielhorn 18 Dec '09

18 Dec '09

Hi, the scale of the program in the bottom doesn't work as I want. I want the :command lambda to be called whenever the scale changes. Is there a different way of being informed of the changes? In ltk.lisp:1761 the tk command scale is actually called with the option "-command" I don't understand the code enough to fiddle in my callback without breaking the existing one. ;; test program (not working as expected): (require :asdf) (require :ltk) (defpackage :mk (:use :cl :ltk)) (in-package :mk) (with-ltk () (let* ((f (make-instance 'frame)) (s (make-instance 'scale :orientation :horizontal :master f :command (lambda () (format t "SCALE NOW ~d~%" (value s))) ;; why can't i write command here )) (b (make-instance 'button :text "get" :master f :command (lambda () (format t "SCALE IS ~d~%" (value s)))))) (pack f) (pack (list s b)))) Regards, Martin -- Martin Kielhorn Randall Division of Cell & Molecular Biophysics King's College London, New Hunt's House Guy's Campus, London SE1 1UL, U.K. tel: +44 (0) 207 848 6519, fax: +44 (0) 207 848 6435

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[ltk-user] First use of ltk
by Greg Bennett 11 Dec '09

11 Dec '09

I am trying to move an application from Windows -> Linux and the graphics part seems to be the most difficult. I hope that ltk can help me along. Under ubuntu 8.10 and SBCL 1.0.23 I have downloaded ltk-0.91.tgz and extracted it into its own directory. SBCL happily compiled ltk.lisp and ltk.fasl loaded too. When I tried to run (ltktest) SBCL became unhappy: Couldn't write to #<SB-SYS:FD-STREAM for "descriptor 6" {B98E79}>: Broken pipe. Perhaps I have put ltk in the wrong place ? Perhaps there is something which I have failed to set up correctly. I see from the troubleshooting file that some web connections/applications can cause difficulty. I am running firefox - from which I retrieve ltk! Any and all advice/comments gratefully received Cheers /Greg Bennett

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ltk-user December 2009