57 lines
1.9 KiB
Plaintext
57 lines
1.9 KiB
Plaintext
;;;; animate.stk -- A simple image animation (Demo)
|
|
;;;;
|
|
;;;; Copyright © 1998 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
|
|
;;;;
|
|
;;;; Permission to use, copy, and/or distribute this software and its
|
|
;;;; documentation for any purpose and without fee is hereby granted, provided
|
|
;;;; that both the above copyright notice and this permission notice appear in
|
|
;;;; all copies and derived works. Fees for distribution or use of this
|
|
;;;; software or derived works may only be charged with express written
|
|
;;;; permission of the copyright holder.
|
|
;;;; This software is provided ``as is'' without express or implied warranty.
|
|
;;;;
|
|
;;;; $Id: animate.stk 1.1 Tue, 10 Mar 1998 21:43:37 +0100 eg $
|
|
;;;;
|
|
;;;; Author: Erick Gallesio [eg@unice.fr]
|
|
;;;; Creation date: 9-Mar-1998 18:51
|
|
;;;;Last file update: 9-Mar-1998 21:07
|
|
|
|
(define *img* #f)
|
|
|
|
(define (make-animation pattern parent delay)
|
|
(let* ((files (sort (glob pattern) string<?))
|
|
(size (length files))
|
|
(images (make-vector size))
|
|
(name (gensym (& (if (eq? parent *root*) "" parent) ".l")))
|
|
(widget (label name :bd 0 :relief "flat" :background "white"
|
|
:env (the-environment))))
|
|
;; Store in the image vector all the components of the animation
|
|
(dotimes (i size)
|
|
(let ((key (list-ref files i)))
|
|
(vector-set! images
|
|
i
|
|
(make-image key :file key))))
|
|
|
|
;; Display the first image of the animation
|
|
(tk-set! widget :image (vector-ref images 0))
|
|
|
|
;; Animate the image
|
|
(letrec ((anim (let ((i 0))
|
|
(lambda ()
|
|
(if (>= delay 0)
|
|
(when (winfo (quote exists) widget)
|
|
(if (>= i size) (set! i 0))
|
|
(tk-set! widget :image (vector-ref images i))
|
|
(set! i (+ i 1))
|
|
(update)
|
|
(after (abs delay) anim))
|
|
(after 100 anim))))))
|
|
(after 'idle anim))
|
|
widget))
|
|
|
|
|
|
(define (change-animation-delay w delay)
|
|
(let ((env (tk-get w :env)))
|
|
(eval `(set! delay ,delay) env)))
|
|
|