stk/STklos/Examples/E1.stklos

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1996-09-27 06:29:02 -04:00
;;;;
;;;; E x a m p l e 1 . s t k
;;;;
;;;; Copyright (C) 1993,1994,1995 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.
;;;;
;;;; Author: Erick Gallesio [eg@kaolin.unice.fr]
;;;; Creation date: 5-Aug-1994 11:11
;;;; Last file update: 5-Aug-1994 16:41
(require "Canvas")
;;;; Create canvas
(define c (make <Canvas>))
(pack c)
;;;; Create items
(define r1 (make <Rectangle> :parent c :coords '( 0 0 50 50) :fill "blue"))
(define r2 (make <Rectangle> :parent c :coords '( 50 50 100 100) :fill "red"))
(define o1 (make <Oval> :parent c :coords '(100 100 150 150) :fill "blue"))
(define o2 (make <Oval> :parent c :coords '(150 150 200 200) :fill "red"))
;;; Define some families
(define rectangles (make <Canvas-group> :parent c))
(define ovals (make <Canvas-group> :parent c))
(define blue (make <Canvas-group> :parent c))
(define red (make <Canvas-group> :parent c))
;;;; And add members of these families
(add-to-group rectangles r1 r2)
(add-to-group ovals o1 o2)
(add-to-group blue r1 o1)
(add-to-group red r2 o2)
;;;; Work with group
(move rectangles 100 100)
(move ovals -100 -100)
(move blue 100 0)
(destroy red)
;;;; Find the items of a group
(format #t "items of group blue ~s\n" (items-of-group blue))
;;;; delete an item of a group
(delete-from-group blue r1)
(format #t "items of group blue ~s\n" (items-of-group blue))
(destroy blue)
;;; Only the blue square (r1) is alive....