;;;;
;;;; L i s t b o x . s t k 		--  Listbox class definition
;;;;
;;;; Copyright © 1993-1996 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.
;;;;
;;;;           Author: Erick Gallesio [eg@unice.fr]
;;;;    Creation date: 28-Feb-1994 14:38
;;;; Last file update:  2-Aug-1995 12:39

(require "Basics")

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;
;;;; <Listbox> class
;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(define-class <Listbox> (<Tk-simple-widget> <Tk-selectable> <Tk-sizeable>
			 <Tk-text-selectable> <Tk-xyscrollable>)
  ((set-grid		:init-keyword :set-grid
		   	:accessor     set-grid
			:tk-name      setgrid
			:allocation   :tk-virtual)
   (select-mode		:init-keyword :select-mode
			:accessor     select-mode
			:tk-name      selectm
			:allocation   :tk-virtual)
   ;; Fictive slot 
   (value		:accessor     value
			:init-keyword :value
			:allocation   :virtual
			:slot-ref     (lambda (o)
					((Id o) 'get 0 'end))
			:slot-set!    (lambda (o v)
					(let ((w  (Id o)))
					  (w 'delete 0 'end)
					  (apply w 'insert 0 v))))))

(define-method tk-constructor ((self <Listbox>))
  Tk:listbox)

;;;
;;; Listbox-activate
;;;
(define-method  listbox-activate ((self <Listbox>) index)
  ((slot-ref self 'Id) 'activate index))

;;;
;;; Bounding-box
;;;
(define-method bounding-box ((self <Listbox>) index)
  ((slot-ref self 'Id) 'bbox index))

;;;
;;; Current-selection
;;;
(define-method current-selection ((self <Listbox>))
  (let ((res ((slot-ref self 'Id) 'curselection)))
    (if (null? res) #f res)))

;;;
;;; Delete
;;; 
(define-method delete ((self <Listbox>) start . end)
  (apply (slot-ref self 'Id) 'delete start end))

;;;
;;; Get
;;;
(define-method get ((self <Listbox>) start . end)
  (apply (slot-ref self 'Id) 'get start end))

;;;
;;; Index
;;;
(define-method listbox-index ((self <Listbox>) index)
  ((slot-ref self 'Id) 'index index))

;;;
;;; Insert
;;;
(define-method insert ((self <Listbox>) index . value)
  (apply (slot-ref self 'Id) 'insert index value))

;;;
;;; Nearest
;;; 
(define-method nearest ((self <Listbox>) index)
  ((slot-ref self 'Id) 'nearest index))


;;;
;;; Mark 
;;; 
(define-method text-mark ((self <Listbox>) x y)
  ((slot-ref self 'Id) 'scan 'mark x y))

;;;
;;; Drag-to 
;;; 
(define-method text-drag-to ((self <Listbox>) x y)
  ((slot-ref self 'Id) 'scan 'dragto x y))

;;;
;;; See-item
;;;
(define-method see-item ((self <Listbox>) index)
  ((slot-ref self 'Id) 'see index))

;;;
;;; Selection-anchor
;;; 
(define-method selection-anchor ((self <Listbox>) index)
  ((slot-ref self 'Id) 'selection 'anchor index))

;;;
;;; Selection-clear
;;; 
(define-method selection-clear ((self <Listbox>) first . last)
  (apply (slot-ref self 'Id) 'selection 'clear first last))

;;;
;;; Selection-includes
;;; 
(define-method selection-includes ((self <Listbox>) index)
  ((slot-ref self 'Id) 'selection 'includes index))

;;;
;;; Selection-set
;;; 
(define-method selection-set ((self <Listbox>) first . last)
  (apply (slot-ref self 'Id) 'selection 'set first last))

;;;
;;; Size
;;; 
(define-method size ((self <Listbox>))
  ((slot-ref self 'Id) 'size))

;;;
;;; X-View
;;; 
(define-method x-view ((self <Listbox>) . args)
  (apply (slot-ref self 'Id) 'xview args))

;;;
;;; Y-View
;;; 
(define-method y-view ((self <Listbox>) args)
  (apply (slot-ref self 'Id) 'yview args))


(provide "Listbox")