61 lines
1.9 KiB
Plaintext
61 lines
1.9 KiB
Plaintext
;;;;
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;;;; E x a m p l e 1 . s t k
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;;;;
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;;;; Copyright © 1994-1999 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
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;;;;
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;;;; Permission to use, copy, modify, distribute,and license this
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;;;; software and its documentation for any purpose is hereby granted,
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;;;; provided that existing copyright notices are retained in all
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;;;; copies and that this notice is included verbatim in any
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;;;; distributions. No written agreement, license, or royalty fee is
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;;;; required for any of the authorized uses.
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;;;; This software is provided ``AS IS'' without express or implied
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;;;; warranty.
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;;;;
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;;;; Author: Erick Gallesio [eg@kaolin.unice.fr]
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;;;; Creation date: 5-Aug-1994 11:11
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;;;; Last file update: 3-Sep-1999 20:08 (eg)
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(require "Canvas")
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;;;; Create canvas
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(define c (make <Canvas>))
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(pack c)
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;;;; Create items
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(define r1 (make <Rectangle> :parent c :coords '( 0 0 50 50) :fill "blue"))
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(define r2 (make <Rectangle> :parent c :coords '( 50 50 100 100) :fill "red"))
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(define o1 (make <Oval> :parent c :coords '(100 100 150 150) :fill "blue"))
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(define o2 (make <Oval> :parent c :coords '(150 150 200 200) :fill "red"))
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;;; Define some families
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(define rectangles (make <Canvas-group> :parent c))
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(define ovals (make <Canvas-group> :parent c))
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(define blue (make <Canvas-group> :parent c))
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(define red (make <Canvas-group> :parent c))
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;;;; And add members of these families
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(add-to-group rectangles r1 r2)
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(add-to-group ovals o1 o2)
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(add-to-group blue r1 o1)
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(add-to-group red r2 o2)
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;;;; Work with group
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(move rectangles 100 100)
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(move ovals -100 -100)
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(move blue 100 0)
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(destroy red)
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;;;; Find the items of a group
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(format #t "items of group blue ~s\n" (items-of-group blue))
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;;;; delete an item of a group
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(delete-from-group blue r1)
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(format #t "items of group blue ~s\n" (items-of-group blue))
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(destroy blue)
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;;; Only the blue square (r1) is alive....
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