stk/STklos/Tk/Composite/Scrolltext.stklos

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;;;;
;;;; S c r o l l t e x t . s t k -- Scroll Text composite widget
;;;;
;;;; Copyright © 1993-1998 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: Scrolltext.stklos 1.2 Wed, 04 Feb 1998 11:34:59 +0100 eg $
;;;;
;;;; Author: Erick Gallesio [eg@kaolin.unice.fr]
;;;; Creation date: 4-Apr-1995 11:19
;;;; Last file update: 4-Feb-1998 11:11
(require "Basics")
(select-module STklos+Tk)
;=============================================================================
;
; < S c r o l l - t e x t >
;
;=============================================================================
(define-class <Scroll-text> (<Tk-composite-widget> <Text>)
((text :accessor text-of)
(h-scrollbar :accessor h-scrollbar-of)
(v-scrollbar :accessor v-scrollbar-of)
(h-scroll-side :accessor h-scroll-side
:allocation :virtual
:init-keyword :h-scroll-side
:slot-ref (lambda (o)
(STk:h-scroll-side (slot-ref o 'h-scrollbar)))
:slot-set! (lambda (o v)
(STk:h-scroll-side-set!
(slot-ref o 'h-scrollbar) v)))
(v-scroll-side :accessor v-scroll-side
:allocation :virtual
:init-keyword :v-scroll-side
:slot-ref (lambda (o)
(STk:v-scroll-side (slot-ref o 'v-scrollbar)))
:slot-set! (lambda (o v)
(STk:v-scroll-side-set!
(slot-ref o 'v-scrollbar) v)))
;; Non allocated slots
(background :accessor background
:init-keyword :background
:allocation :propagated
:propagate-to (frame text h-scrollbar v-scrollbar))
(border-width :accessor border-width
:allocation :propagated
:init-keyword :border-width
:propagate-to (frame))
(relief :accessor relief
:init-keyword :relief
:allocation :propagated
:propagate-to (frame))))
;;;;
;;;; <Scroll-text> methods
;;;;
(define-method initialize-composite-widget ((self <Scroll-text>) initargs parent)
(let* ((hs (make <Scrollbar> :parent parent :orientation "horizontal"))
(vs (make <Scrollbar> :parent parent :orientation "vertical"))
(t (make <Text> :parent parent)))
;; Set internal true slots
(slot-set! self 'Id (slot-ref t 'Id))
(slot-set! self 'text t)
(slot-set! self 'h-scrollbar hs)
(slot-set! self 'v-scrollbar vs)
;; Place internal widgets
(grid hs :row 0 :column 1 :sticky "we") (grid 'remove hs)
(grid t :row 1 :column 1 :sticky "nswe")
(grid vs :row 1 :column 2 :sticky "ns")
(grid 'rowconf parent 1 :weight 1)
(grid 'columnconf parent 1 :weight 1)
;; Attach command to scrollbar and text
(slot-set! t 'x-scroll-command (lambda l (apply (slot-ref hs 'Id) 'set l)))
(slot-set! t 'y-scroll-command (lambda l (apply (slot-ref vs 'Id) 'set l)))
(slot-set! hs 'command (lambda args (apply (slot-ref t 'Id) 'xview args)))
(slot-set! vs 'command (lambda args (apply (slot-ref t 'Id) 'yview args)))
))
(provide "Scrolltext")
#|
Example:
(define x (make <Scroll-Text> :width 40 :height 5 :wrap 'word))
(pack x :expand #t :fill 'both)
|#