101 lines
3.6 KiB
Plaintext
101 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 © 1993-1996 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
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;;;;
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;;;; Permission to use, copy, and/or distribute this software and its
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;;;; documentation for any purpose and without fee is hereby granted, provided
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;;;; that both the above copyright notice and this permission notice appear in
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;;;; all copies and derived works. Fees for distribution or use of this
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;;;; software or derived works may only be charged with express written
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;;;; permission of the copyright holder.
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;;;; This software is provided ``as is'' without express or implied 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: 13-Aug-1996 23:23
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(require "Frame")
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(require "Canvas")
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(require "Scrollbar")
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;
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;;;; <Scroll-canvas> class definition
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;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-class <Scroll-canvas> (<Tk-composite-widget> <Canvas>)
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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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(let ((hs (slot-ref o 'h-scrollbar)))
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(and (winfo 'ismapped hs)
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(get-keyword :side (pack 'info hs)))))
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:slot-set! (lambda (o v)
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(let ((hs (slot-ref o 'h-scrollbar)))
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(if v
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(pack hs :fill "x" :side v
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:before (slot-ref o 'canvas))
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(pack 'forget hs)))))
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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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(let ((vs (slot-ref o 'v-scrollbar)))
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(and (winfo 'ismapped vs)
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(get-keyword :side (pack 'info vs)))))
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:slot-set! (lambda (o v)
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(let ((vs (slot-ref o 'v-scrollbar)))
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(if v
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(pack vs :fill "y" :side v
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:before (slot-ref o 'canvas))
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(pack 'forget vs)))))
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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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;; Pack internal widgets (Warning: Order is dependant !!!!)
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(pack vs :fill 'y :side 'right)
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(pack c :expand #t :fill "both" :side 'bottom :after vs)
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(pack hs :fill 'x :after c)
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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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