153 lines
4.5 KiB
Plaintext
153 lines
4.5 KiB
Plaintext
;;;;
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;;;; C h o i c e b o x . s t k -- Choice Box composite widget
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;;;;
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;;;; Copyright © 1993-1998 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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;;;; $Id: Choicebox.stklos 1.3 Wed, 04 Feb 1998 11:34:59 +0100 eg $
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;;;;
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;;;; Author: Erick Gallesio [eg@kaolin.unice.fr]
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;;;; Creation date: 22-Mar-1994 13:05
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;;;; Last file update: 3-Feb-1998 19:22
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(require "Basics")
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(select-module STklos+Tk)
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(export add-choice)
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;=============================================================================
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;
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; < C h o i c e - b o x >
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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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(option 'add "*ChoiceBox*Entry*Background" "white" "widgetDefault")
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(option 'add "*ChoiceBox*Entry*Relief" "ridge" "widgetDefault")
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(option 'add "*ChoiceBox*Menu*TearOff" "false" "widgetDefault")
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;;
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;; Utilities for accesing the set of choices as a whole (slot 'choices)
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;;
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(define (get-choices cb)
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;; This is a little bit compilated because the type of the element of the
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;; list depends of the :string-value option
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(letrec ((menu (menu-of cb))
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(last (menu-index menu 'last))
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(get-item (lambda (i res)
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(if (< i 0)
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res
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(let ((item ((Id menu) 'entrycget i :label)))
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(get-item (- i 1)
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(cons (if (string-value cb)
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item
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(read-from-string item))
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res)))))))
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(if (equal? last "none")
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'()
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(get-item last '()))))
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(define (set-choices! cb v)
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(let ((menu (menu-of cb)))
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;; Delete the current choices
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(delete menu 0 (menu-index menu 'last))
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;; Add the current value by suuceesive calls to add-choice
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(for-each (lambda (x) (add-choice cb x)) v)))
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;;
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;; Class definition
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;;
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(define-class <Choice-box> (<Tk-composite-widget> <Labeled-Entry>)
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((lentry :accessor lentry-of)
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(menu :accessor menu-of)
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(menubutton :accessor menubutton-of)
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(class :init-keyword :class
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:init-form "ChoiceBox")
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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 lentry menu menubutton))
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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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(choices :accessor choices
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:init-keyword :choices
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:allocation :virtual
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:slot-ref get-choices
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:slot-set! set-choices!)
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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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;;;; <Choice-box> methods
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;;;;
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(define-method initialize-composite-widget ((self <Choice-box>) initargs parent)
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(let* ((l #f)
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(mb (make <Menu-button> :parent parent :text "" :relief "flat"
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:borderwidth 0 :highlight-thickness 0
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:indicator-on #t))
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(m (make <Menu> :parent mb)))
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(next-method)
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(set! l self)
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(pack (Id l) :side "left" :fill "x" :expand #t)
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(pack mb :side "right")
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;; Initialize true slots
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(slot-set! self 'Id (slot-ref l 'Id))
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(slot-set! self 'lentry l)
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(slot-set! self 'menu m)
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(slot-set! self 'menubutton mb)
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;; Attach menu m to menu button mb
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(set! (menu-of mb) m)))
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;;
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;; add-choice permits to add a new choice (a string) in the associated
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;; Choice-box menu
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;;
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(define-method add-choice ((self <Choice-box>) mess)
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(menu-add (Menu-of self)
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'command
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:label mess
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:command (lambda ()
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(let ((s (state self)))
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(set! (state self) "normal")
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(set! (value self) mess)
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(set! (state self) s)))))
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(provide "Choicebox")
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#|
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Examples:
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(define c1 (make <Choice-box> :title "Enter your choice"
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:title-anchor 'e :title-width 20
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:value "Type <Return> to add"))
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(bind c1 "<Return>" (lambda () (add-choice c1 (value c1))))
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;; Now one with a set of value pre-defined and no other value allowed
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(define c2 (make <Choice-box> :title "Enter another choice"
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:title-anchor 'e :title-width 20
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:state "disabled" :choices '(1 2 3 4)))
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(pack c1 c2)
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|#
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