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|
#| nokogiri-widget.jl -- high-level widget encapsulation
$Id: widget.jl,v 1.21 2003/07/30 05:56:04 jsh Exp $
Copyright (C) 2000 John Harper <john@dcs.warwick.ac.uk>
This file is part of sawfish.
sawfish is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
sawfish is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with sawfish; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|#
(define-structure sawfish.gtk.widget
(export add-widget-prefix
define-widget-type
widget-type-constructor
widget-accepts-doc-string
widget-accepts-doc-string-p
make-widget
widget-ref
widget-set
widget-clear
widget-gtk-widget
widget-valid-p
call-callback
make-signal-callback
tooltip-split
tooltip-set
set-widget-enabled
enable-widget
disable-widget
box-spacing
box-border
button-box-spacing)
((open rep
gui.gtk-2.gtk
rep.system
rep.regexp)
(access rep.structures))
(defconst box-spacing 4)
(defconst box-border 5)
(defconst button-box-spacing 8)
;; list of possible module prefixes when auto-loading widgets
(define widget-prefixes '(sawfish.gtk.widgets))
;; predefined widget types are:
;; (symbol OPTIONS...)
;; (string)
;; (number [MIN [MAX]])
;; (boolean [LABEL])
;; (color)
;; (font)
;; (or ITEMS...)
;; (and ITEMS...)
;; (v-and ITEMS...)
;; (h-and ITEMS...)
;; (labelled LABEL ITEM)
;; (optional ITEM)
;; items without arguments may be specified by name, i.e. `string'
;; instead of `(string)'
(define (add-widget-prefix arg)
(setq widget-prefixes (cons arg (delq arg widget-prefixes))))
(define (define-widget-type name constructor)
(put name 'nokogiri-widget-constructor constructor))
(define (widget-type-constructor name)
(or (get name 'nokogiri-widget-constructor)
;; try to dynamically load the widget constructor..
(catch 'out
(mapc (lambda (prefix)
(let ((module-name (intern (concat (symbol-name prefix)
#\. (symbol-name name)))))
(condition-case nil
(progn
(rep.structures#intern-structure module-name)
(throw 'out (get name 'nokogiri-widget-constructor)))
(error nil))))
widget-prefixes)
(widget-type-constructor 'unknown))))
(define (widget-accepts-doc-string name)
(put name 'nokogiri-widget-accepts-doc-string t))
(define (widget-accepts-doc-string-p name)
(widget-type-constructor name)
(get name 'nokogiri-widget-accepts-doc-string))
;; stack `and' items horizontally by default
(define and-direction (make-fluid 'horizontal))
(define callback-enabled (make-fluid t))
;;; High level widget management
;; each widget is a function taking a single argument, the operation to
;; perform on the item. Operations include:
;; (ref) => VALUE
;; (set VALUE)
;; (clear)
;; gtk-widget => GTK-WIDGET
;; (validp ARG) => BOOL
;; functional operations return the function to perform the operation
;; create a new item of type defined by CELL, either a list (TYPE ARGS...)
;; or a single symbol TYPE. CALLBACK is a function to be called whenever
;; the item's value changes
(define (make-widget cell #!optional callback doc-string)
(let*
((type (or (car cell) cell))
(maker (or (widget-type-constructor type)
(widget-type-constructor 'unknown))))
(if maker
(if (and doc-string (widget-accepts-doc-string-p type))
(let* ((split (tooltip-split doc-string))
(widget (apply maker callback (car split) (cdr cell))))
(when (cdr split)
(tooltip-set (widget-gtk-widget widget) (cdr split)))
widget)
(apply maker callback (cdr cell)))
(error "No widget of type %s" type))))
(define (widget-ref item) ((item 'ref)))
(define (widget-set item value)
(let-fluids ((callback-enabled nil))
((item 'set) value)))
(define (widget-clear item)
(let-fluids ((callback-enabled nil))
((item 'clear))))
(define (widget-gtk-widget item) (item 'gtk-widget))
(define (widget-valid-p item value) ((item 'validp) value))
(define (set-widget-enabled item enabled)
(gtk-widget-set-sensitive (widget-gtk-widget item) enabled))
(define (enable-widget item) (set-widget-enabled item t))
(define (disable-widget item) (set-widget-enabled item nil))
(define (call-callback fun)
(when (and fun (fluid callback-enabled))
(fun)))
(define (make-signal-callback fun) (lambda () (call-callback fun)))
;;; tooltip support
(define tooltips)
;; returns (LABEL-STRING . TOOLTIP-STRING-OR-NIL)
(define (tooltip-split doc)
(if (string-match "\n\n\\s*" doc)
(cons (substring doc 0 (match-start))
(substring doc (match-end)))
(cons doc nil)))
(define (tooltip-set widget tip-string #!optional (key "Foo"))
(unless tooltips
(setq tooltips (gtk-tooltips-new)))
(gtk-tooltips-set-tip tooltips widget tip-string key))
;;; Predefined widget constructors
(define (make-choice-item changed-callback . options)
(let ((omenu (gtk-option-menu-new))
(menu (gtk-menu-new))
(value (or (caar options) (car options))))
(let loop ((rest options)
(last nil))
(when rest
(let ((button (gtk-radio-menu-item-new-with-label-from-widget
last (_ (or (cadar rest) (symbol-name (car rest)))))))
(gtk-menu-shell-append menu button)
(gtk-widget-show button)
(g-signal-connect button "toggled"
(lambda (w)
(when (gtk-check-menu-item-active w)
(setq value (or (caar rest) (car rest)))
(call-callback changed-callback))))
(loop (cdr rest) button))))
(gtk-option-menu-set-menu omenu menu)
(gtk-widget-show-all omenu)
(lambda (op)
(case op
((set) (lambda (x)
(setq value x)
(let ((idx (option-index options x)))
(gtk-option-menu-set-history omenu (or idx 0))
(do ((i 0 (1+ i))
(rest (gtk-container-get-children menu) (cdr rest)))
((null rest))
(gtk-check-menu-item-set-active (car rest) (= i idx))))))
((clear) nop)
((ref) (lambda () value))
((gtk-widget) omenu)
((validp) (lambda (x) (option-index options x)))))))
(define-widget-type 'choice make-choice-item)
(define (make-symbol-item changed-callback #!rest options)
(let ((widget (gtk-combo-new)))
(when options
(gtk-combo-set-popdown-strings
widget (cons "" (mapcar symbol-name options))))
(when changed-callback
(g-signal-connect
(gtk-combo-entry widget)
"changed" (make-signal-callback changed-callback)))
(gtk-widget-show widget)
(lambda (op)
(case op
((set) (lambda (x)
;; Can't i18n'ize these strings..
(gtk-entry-set-text (gtk-combo-entry widget)
(if x (symbol-name x) ""))))
((clear) (lambda ()
(gtk-entry-set-text (gtk-combo-entry widget) "")))
((ref) (lambda ()
(string->symbol
(gtk-entry-get-text (gtk-combo-entry widget)))))
((gtk-widget) widget)
((validp) symbolp)))))
(define-widget-type 'symbol make-symbol-item)
(define (make-string-item changed-callback)
(let ((widget (gtk-entry-new)))
(when changed-callback
(g-signal-connect
widget "changed" (make-signal-callback changed-callback)))
(gtk-widget-show widget)
(lambda (op)
(case op
((set) (lambda (x)
(gtk-entry-set-text widget (or x ""))))
((clear) (lambda ()
(gtk-entry-set-text widget "")))
((ref) (lambda () (gtk-entry-get-text widget)))
((gtk-widget) widget)
((validp) stringp)))))
(define-widget-type 'string make-string-item)
(define (make-number-item changed-callback #!optional minimum maximum)
;; XXX backwards compat..
(when (eq minimum 'nil) (setq minimum nil))
(when (eq maximum 'nil) (setq maximum nil))
(let ((widget (gtk-spin-button-new-with-range (or minimum 0)
(or maximum 65535) 1)))
(when changed-callback
(g-signal-connect
widget "changed" (make-signal-callback changed-callback)))
(gtk-widget-show widget)
(lambda (op)
(case op
((set) (lambda (x)
(when (numberp x)
(gtk-spin-button-set-value widget x))))
((clear) nop)
((ref) (lambda ()
(let ((value (gtk-spin-button-get-value widget)))
(if (integerp value)
(inexact->exact value)
value))))
((gtk-widget) widget)
((validp) numberp)))))
(define-widget-type 'number make-number-item)
(define (make-boolean-item changed-callback #!optional label)
(let ((widget (if label
(gtk-check-button-new-with-label label)
(gtk-check-button-new))))
(when label
(gtk-label-set-justify (car (gtk-container-get-children widget)) 'left))
(when changed-callback
(g-signal-connect
widget "toggled" (make-signal-callback changed-callback)))
(gtk-widget-show widget)
(lambda (op)
(case op
((set) (lambda (x)
(gtk-toggle-button-set-active widget x)))
((clear) (lambda ()
(gtk-toggle-button-set-active widget nil)))
((ref) (lambda ()
(gtk-toggle-button-get-active widget)))
((gtk-widget) widget)
((validp) (lambda () t))))))
(define-widget-type 'boolean make-boolean-item)
(widget-accepts-doc-string 'boolean)
;;; ``Meta'' widgets
(define (make-or-item changed-callback #!rest items)
(setq items (mapcar (lambda (x)
(make-widget x changed-callback)) items))
(let* ((box (gtk-vbox-new nil box-spacing))
(hboxes (mapcar (lambda ()
(gtk-hbox-new nil box-spacing)) items))
(checks (mapcar (lambda ()
(gtk-check-button-new)) items))
(enabled-item nil)
(refresh-item
(lambda ()
(let ((i 0))
(mapc (lambda (x)
(set-widget-enabled x (eq enabled-item x))
(gtk-toggle-button-set-active
(nth i checks) (eq enabled-item x))
(setq i (1+ i))) items))
(call-callback changed-callback)))
(toggle-fun
(lambda (index)
(when (or (eq (nth index items) enabled-item)
(gtk-toggle-button-get-active (nth index checks)))
(setq enabled-item (and (gtk-toggle-button-get-active
(nth index checks))
(nth index items))))
(refresh-item))))
(do ((i 0 (1+ i)))
((= i (length items)))
(g-signal-connect (nth i checks) "toggled" (lambda ()
(toggle-fun i)))
(gtk-box-pack-start box (nth i hboxes))
(gtk-box-pack-start (nth i hboxes) (nth i checks))
(gtk-box-pack-start (nth i hboxes) (widget-gtk-widget (nth i items))))
(refresh-item)
(gtk-widget-show-all box)
(lambda (op)
(case op
((set)
(lambda (x)
(if (null x)
(setq enabled-item nil)
(if (and enabled-item (widget-valid-p enabled-item x))
;; set the enabled value if possible
(widget-set enabled-item x)
;; look for a matching type
(catch 'done
(do ((i 0 (1+ i)))
((= i (length items)))
(when (widget-valid-p (nth i items) x)
(setq enabled-item (nth i items))
(widget-set enabled-item x)
(throw 'done t)))
(message (format nil (_ "No matching item for %S") x)))))
(refresh-item)))
((clear) (lambda ()
(setq enabled-item nil)
(mapc (lambda (item)
(widget-clear item)) items)
(refresh-item)))
((ref) (lambda ()
(and enabled-item (widget-ref enabled-item))))
((gtk-widget) box)
((validp) (lambda (x)
(catch 'out
(do ((i 0 (1+ i)))
((= i (length items)))
(when (widget-valid-p (nth i items) x)
(throw 'out t))))))))))
(define-widget-type 'or make-or-item)
(defun make-and-item (changed-callback #!rest items)
(setq items (mapcar (lambda (x)
(make-widget x changed-callback)) items))
(let
((box ((if (eq (fluid and-direction) 'horizontal)
gtk-hbox-new
gtk-vbox-new) nil box-spacing)))
(do ((i 0 (1+ i)))
((= i (length items)))
(gtk-box-pack-start box (widget-gtk-widget (nth i items)) t t))
(gtk-widget-show-all box)
(lambda (op)
(case op
((set) (lambda (x)
(do ((i 0 (1+ i)))
((= i (length items)))
(widget-set (nth i items) (nth i x)))))
((clear) (lambda () (mapc widget-clear items)))
((ref) (lambda () (mapcar widget-ref items)))
((gtk-widget) box)
((validp) (lambda (x)
(cond ((null x))
((or (not (listp x))
(/= (length x) (length items)))
nil)
(t
(catch 'out
(do ((i 0 (1+ i)))
((= i (length items)))
(unless (widget-valid-p
(nth i items) (nth i x))
(throw 'out nil)))
t)))))))))
(define-widget-type 'and make-and-item)
(define-widget-type 'h-and (lambda (#!rest args)
(let-fluids ((and-direction 'horizontal))
(apply make-and-item args))))
(define-widget-type 'v-and (lambda (#!rest args)
(let-fluids ((and-direction 'vertical))
(apply make-and-item args))))
(define (make-labelled-item changed-callback label item)
(let ((box (gtk-hbox-new nil box-spacing)))
(setq item (make-widget item changed-callback))
;; XXX i18n the label string?
(gtk-box-pack-start box (gtk-label-new label))
(gtk-container-add box (widget-gtk-widget item))
(gtk-widget-show-all box)
(lambda (op)
(if (eq op 'gtk-widget)
box
(item op)))))
(define-widget-type 'labelled make-labelled-item)
(define (make-optional-item changed-callback item)
(let ((box (gtk-hbox-new nil box-spacing))
(check (gtk-check-button-new)))
(setq item (make-widget item changed-callback))
(gtk-box-pack-start box check)
(gtk-box-pack-start box (widget-gtk-widget item))
(g-signal-connect
check "toggled"
(lambda ()
(set-widget-enabled item (gtk-toggle-button-get-active check))
(call-callback changed-callback)))
(gtk-toggle-button-set-active check nil)
(disable-widget item)
(gtk-widget-show-all box)
(lambda (op)
(case op
((set) (lambda (x)
(when x
(widget-set item x))
(set-widget-enabled item x)
(gtk-toggle-button-set-active check x)))
((clear) (lambda ()
(widget-clear item)
(disable-widget item)
(gtk-toggle-button-set-active check nil)))
((ref) (lambda ()
(and (gtk-toggle-button-get-active check)
(widget-ref item))))
((gtk-widget) box)
((validp) (lambda (x)
(or (null x) (widget-valid-p item x))))))))
(define-widget-type 'optional make-optional-item)
(define (make-quoted-item changed item)
(let ((widget (make-widget item changed)))
(lambda (op)
(case op
((ref) (lambda ()
(list 'quote (widget-ref widget))))
((set) (lambda (x)
(widget-set widget (cadr x))))
((validp) (lambda (x)
(and (eq (car x) 'quote)
(widget-valid-p widget (cadr x)))))
(t (widget op))))))
(define-widget-type 'quoted make-quoted-item)
;;; widget used for unknown widget types
(define (make-unknown-item changed-callback)
(declare (unused changed-callback))
(let ((label (gtk-label-new (format nil (_ "** unknown widget ** "))))
value)
(gtk-widget-show label)
(lambda (op)
(case op
((set) (lambda (x) (setq value x)))
((clear) (lambda () (setq value nil)))
((ref) (lambda () value))
((gtk-widget) label)
((validp) (lambda (x) (declare (unused x)) t))))))
(define-widget-type 'unknown make-unknown-item)
;;; utility functions
(define string->symbol intern)
(define (option-index lst x)
(let loop ((i 0) (rest lst))
(cond ((null rest) nil)
((eq (or (caar rest) (car rest)) x) i)
(t (loop (1+ i) (cdr rest)))))))
|
