112 lines
3.6 KiB
Plaintext
112 lines
3.6 KiB
Plaintext
;;;;
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;;;; S c r o l l c a n v a s . s t k -- Scroll Canvas composite widget
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;;;;
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;;;; Copyright © 1993-1999 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: 25-Mar-1995 11:03
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;;;; Last file update: 3-Sep-1999 20:14 (eg)
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(require "Basics")
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(select-module STklos+Tk)
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;=============================================================================
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;
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; < S c r o l l - c a n v a s >
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;
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;=============================================================================
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;;;;
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;;;; Resources
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;;;;
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;;;;
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;;;; Class definition
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;;;;
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(define-class <Scroll-canvas> (<Tk-composite-widget> <Canvas>)
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((class :init-keyword :class
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:init-form "ScrollCanvas")
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(canvas :accessor canvas-of)
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(h-scrollbar :accessor h-scrollbar-of)
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(v-scrollbar :accessor v-scrollbar-of)
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(h-scroll-side :accessor h-scroll-side
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:allocation :virtual
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:init-keyword :h-scroll-side
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:slot-ref (lambda (o)
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(STk:h-scroll-side (slot-ref o 'h-scrollbar)))
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:slot-set! (lambda (o v)
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(STk:h-scroll-side-set!
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(slot-ref o 'h-scrollbar) v)))
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(v-scroll-side :accessor v-scroll-side
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:allocation :virtual
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:init-keyword :v-scroll-side
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:slot-ref (lambda (o)
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(STk:v-scroll-side (slot-ref o 'v-scrollbar)))
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:slot-set! (lambda (o v)
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(STk:v-scroll-side-set!
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(slot-ref o 'v-scrollbar) v)))
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;; Non allocated slots
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(background :accessor background
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:init-keyword :background
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:allocation :propagated
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:propagate-to (frame canvas h-scrollbar v-scrollbar))
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(border-width :accessor border-width
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:allocation :propagated
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:init-keyword :border-width
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:propagate-to (frame))
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(relief :accessor relief
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:init-keyword :relief
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:allocation :propagated
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:propagate-to (frame))))
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;;;;
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;;;; <Scroll-canvas> methods
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;;;;
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(define-method initialize-composite-widget ((self <Scroll-canvas>) initargs parent)
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(let* ((hs (make <Scrollbar> :parent parent :orientation "horizontal"))
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(vs (make <Scrollbar> :parent parent :orientation "vertical"))
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(c (make <Canvas> :parent parent)))
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;; Set internal true slots
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(slot-set! self 'Id (slot-ref c 'Id))
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(slot-set! self 'canvas c)
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(slot-set! self 'h-scrollbar hs)
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(slot-set! self 'v-scrollbar vs)
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;; Place internal widgets
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(grid hs :row 0 :column 1 :sticky "we")
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(grid c :row 1 :column 1 :sticky "nswe")
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(grid vs :row 1 :column 2 :sticky "ns")
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(grid 'rowconf parent 1 :weight 1)
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(grid 'columnconf parent 1 :weight 1)
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;; Attach command to scrollbar and canvas
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(slot-set! c 'x-scroll-command (lambda l (apply (slot-ref hs 'Id) 'set l)))
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(slot-set! c 'y-scroll-command (lambda l (apply (slot-ref vs 'Id) 'set l)))
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(slot-set! hs 'command (lambda args (apply (slot-ref c 'Id) 'xview args)))
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(slot-set! vs 'command (lambda args (apply (slot-ref c 'Id) 'yview args)))
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))
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(provide "Scrollcanvas")
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#|
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Example:
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(define c (make <Scroll-Canvas> :scroll-region '(-1000 -1000 1000 1000)))
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(define r (make <Oval> :coords '(0 0 300 300) :fill "blue" :parent c))
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(pack c :expand #t :fill "both")
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|#
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