gui/collects/framework/private/preferences.ss
Robby Findler 1ceb0987e7 ..
original commit: e112bfd27b942739988461ca92e2708f1e57b5b2
2003-01-23 16:14:05 +00:00

875 lines
40 KiB
Scheme

(module preferences mzscheme
(require (lib "string-constant.ss" "string-constants")
(lib "unitsig.ss")
(lib "class.ss")
(lib "file.ss")
"sig.ss"
"../gui-utils.ss"
(lib "mred-sig.ss" "mred")
(lib "pretty.ss")
(lib "list.ss"))
(provide preferences@)
(define preferences@
(unit/sig framework:preferences^
(import mred^
[exn : framework:exn^]
[exit : framework:exit^]
[panel : framework:panel^]
[frame : framework:frame^])
(rename [-read read])
(define main-preferences-symbol 'plt:framework-prefs)
;; preferences : sym -o> (union marshalled pref)
(define preferences (make-hash-table))
;; marshall-unmarshall : sym -o> un/marshall
(define marshall-unmarshall (make-hash-table))
;; callbacks : sym -o> (listof (sym TST -> boolean))
(define callbacks (make-hash-table))
;; defaults : sym -o> default
(define defaults (make-hash-table))
(define-struct un/marshall (marshall unmarshall))
(define-struct marshalled (data))
(define-struct pref (value))
(define-struct default (value checker))
(define guard
(lambda (when p value thunk failure)
(with-handlers ([not-break-exn? failure])
(thunk))))
(define (unmarshall p marshalled)
(let/ec k
(let* ([data (marshalled-data marshalled)]
[unmarshall-fn (un/marshall-unmarshall
(hash-table-get marshall-unmarshall
p
(lambda () (k data))))])
(guard "unmarshalling" p marshalled
(lambda () (unmarshall-fn data))
(lambda (exn)
(begin0
(hash-table-get
defaults
p
(lambda ()
(raise exn)))
(message-box (format (string-constant error-unmarshalling) p)
(if (exn? exn)
(format "~a" (exn-message exn))
(format "~s" exn)))))))))
;; get-callbacks : sym -> (listof (-> void))
(define (get-callbacks p)
(hash-table-get callbacks
p
(lambda () null)))
;; pref-callback : (make-pref-callback (sym tst -> void))
;; this is used as a wrapped to hack around the problem
;; that different procedures might be eq?.
(define-struct pref-callback (cb))
;; add-callback : sym (-> void) -> void
(define (add-callback p callback)
(let ([new-cb (make-pref-callback callback)])
(hash-table-put! callbacks p
(append
(hash-table-get callbacks p (lambda () null))
(list new-cb)))
(lambda ()
(hash-table-put!
callbacks
p
(let loop ([callbacks (hash-table-get callbacks p (lambda () null))])
(cond
[(null? callbacks) null]
[else
(let ([callback (car callbacks)])
(cond
[(eq? callback new-cb)
(loop (cdr callbacks))]
[else
(cons (car callbacks) (loop (cdr callbacks)))]))]))))))
(define (check-callbacks p value)
(for-each (lambda (x)
(guard "calling callback" p value
(lambda () ((pref-callback-cb x) p value))
raise))
(get-callbacks p)))
(define (get p)
(let ([ans (hash-table-get preferences p
(lambda ()
(raise (exn:make-unknown-preference
(format "preferences:get: attempted to get unknown preference: ~e" p)
(current-continuation-marks)))))])
(cond
[(marshalled? ans)
(let* ([default-s
(hash-table-get
defaults p
(lambda ()
(raise (exn:make-unknown-preference
(format "preferences:get: no default pref for: ~e" p)
(current-continuation-marks)))))]
[default (default-value default-s)]
[checker (default-checker default-s)]
[unmarshalled (let ([unmarsh (unmarshall p ans)])
(if (checker unmarsh)
unmarsh
default))]
[pref (begin (check-callbacks p unmarshalled)
unmarshalled)])
(hash-table-put! preferences p (make-pref pref))
pref)]
[(pref? ans)
(pref-value ans)]
[else (error 'prefs.ss "robby error.1: ~a" ans)])))
(define (default-set? p)
(let/ec k
(hash-table-get defaults p (lambda () (k #f)))
#t))
(define (set p value)
(let* ([pref (hash-table-get preferences p (lambda () #f))])
(unless (default-set? p)
(error 'preferences:set "tried to set a preference but no default set for ~e, with ~e"
p value))
(cond
[(pref? pref)
(check-callbacks p value)
(set-pref-value! pref value)]
[(or (marshalled? pref)
(not pref))
(check-callbacks p value)
(hash-table-put! preferences p (make-pref value))]
[else
(error 'prefs.ss "robby error.0: ~a" pref)])))
(define set-un/marshall
(lambda (p marshall unmarshall)
(unless (default-set? p)
(error 'set-un/marshall "must call set-default for ~s before calling set-un/marshall for ~s"
p p))
(hash-table-put! marshall-unmarshall p (make-un/marshall marshall unmarshall))))
(define restore-defaults
(lambda ()
(hash-table-for-each
defaults
(lambda (p v) (set p v)))))
;; set-default : (sym TST (TST -> boolean) -> void
(define (set-default p default-value checker)
(let ([default-okay? (checker default-value)])
(unless default-okay?
(error 'set-default "~s: checker (~s) returns ~s for ~s, expected #t~n"
p checker default-okay? default-value))
(hash-table-get preferences p
(lambda ()
(hash-table-put! preferences p (make-pref default-value))))
(hash-table-put! defaults p (make-default default-value checker))))
(define (save)
(with-handlers ([(lambda (x) #t)
(lambda (exn)
(message-box
(string-constant preferences)
(format (string-constant error-saving-preferences)
(exn-message exn)))
#f)])
(let ([syms (list main-preferences-symbol)]
[vals (list (hash-table-map preferences marshall-pref))]
[res #t])
(put-preferences
syms vals
(lambda (filename)
(let* ([d (make-object dialog% (string-constant preferences))]
[m (make-object message% (string-constant waiting-for-pref-lock) d)])
(thread
(lambda ()
(sleep 2)
(send d show #f)))
(send d show #t)
(put-preferences
syms vals
(lambda (filename)
(set! res #f)
(message-box
(string-constant preferences)
(format (string-constant pref-lock-not-gone) filename)))))))
res)))
(define (marshall-pref p ht-value)
(cond
[(marshalled? ht-value) (list p (marshalled-data ht-value))]
[(pref? ht-value)
(let* ([value (pref-value ht-value)]
[marshalled
(let/ec k
(guard "marshalling" p value
(lambda ()
((un/marshall-marshall
(hash-table-get marshall-unmarshall p
(lambda ()
(k value))))
value))
raise))])
(list p marshalled))]
[else (error 'prefs.ss "robby error.2: ~a" ht-value)]))
(define (read-err input msg)
(message-box
(string-constant preferences)
(let* ([max-len 150]
[s1 (format "~s" input)]
[ell "..."]
[s2 (if (<= (string-length s1) max-len)
s1
(string-append
(substring s1 0 (- max-len
(string-length ell)))
ell))])
(string-append
(string-constant error-reading-preferences)
"\n"
msg
s2))))
(define (for-each-pref-in-file parse-pref preferences-filename)
(let/ec k
(let ([input (with-handlers
([not-break-exn?
(lambda (exn)
(message-box
(string-constant error-reading-preferences)
(string-append
(string-constant error-reading-preferences)
(format "\n~a" (exn-message exn))))
(k #f))])
(call-with-input-file preferences-filename read 'text))])
(if (eof-object? input)
(void)
(for-each-pref-in-sexp input parse-pref)))))
;; for-each-pref-in-sexp : sexp (symbol TST -> void) -> void
(define (for-each-pref-in-sexp input parse-pref)
(let/ec k
(let loop ([input input])
(when (pair? input)
(let ([pre-pref (car input)])
(if (and (pair? pre-pref)
(pair? (cdr pre-pref))
(null? (cddr pre-pref)))
(parse-pref (car pre-pref) (cadr pre-pref))
(begin (read-err input (string-constant expected-list-of-length2))
(k #f))))
(loop (cdr input))))))
;; add-raw-pref-to-ht : hash-table symbol marshalled-preference -> void
(define (add-raw-pref-to-ht ht p marshalled)
(let* ([ht-pref (hash-table-get ht p (lambda () #f))]
[unmarshall-struct (hash-table-get marshall-unmarshall p (lambda () #f))])
(cond
[unmarshall-struct
(set p ((un/marshall-unmarshall unmarshall-struct) marshalled))]
;; in this case, assume that no marshalling/unmarshalling
;; is going to take place with the pref, since an unmarshalled
;; pref was already there.
[(pref? ht-pref)
(set p marshalled)]
[(marshalled? ht-pref)
(set-marshalled-data! ht-pref marshalled)]
[(and (not ht-pref) unmarshall-struct)
(set p ((un/marshall-unmarshall unmarshall-struct) marshalled))]
[(not ht-pref)
(hash-table-put! ht p (make-marshalled marshalled))]
[else (error 'prefs.ss "robby error.3: ~a" ht-pref)])))
;; read : -> void
(define (-read)
(let/ec k
(let ([sexp (get-preference main-preferences-symbol (lambda () (k #f)))])
(install-stashed-preferences sexp))))
;; install-stashed-preferences : sexp -> void
;; ensure that `prefs' is actuall a well-formed preferences
;; table and installs them as the current preferences.
(define (install-stashed-preferences prefs)
(for-each-pref-in-sexp
prefs
(lambda (p marshalled)
(add-raw-pref-to-ht preferences p marshalled))))
;; ; ;;;
; ;
; ;
;;;; ;;; ;;;; ; ;;; ;;; ;
; ; ; ; ; ; ; ; ;
; ; ; ;;;; ; ; ; ; ;
; ; ; ; ; ; ; ; ; ;
; ; ; ; ; ; ; ; ; ;
;;; ; ;;;;; ;;; ; ;;;;;; ;;; ;;;;
;
;
;;;
;; ppanel-tree =
;; (union (make-ppanel-leaf string (union #f panel) (panel -> panel))
;; (make-ppanel-interior string (union #f panel) (listof panel-tree)))
(define-struct ppanel (name panel))
(define-struct (ppanel-leaf ppanel) (maker))
(define-struct (ppanel-interior ppanel) (children))
;; ppanels : (listof ppanel-tree)
(define ppanels null)
(define preferences-dialog #f)
(define (add-panel title make-panel)
(when preferences-dialog
(error 'add-panel "preferences dialog already open, cannot add new panels"))
(let ([titles (if (string? title)
(list title)
title)])
(add-to-existing-children
titles
make-panel
(lambda (new-subtree) (set! ppanels (cons new-subtree ppanels))))))
;; add-to-existing-children : (listof string) (panel -> panel) (ppanel -> void)
;; adds the child specified by the path in-titles to the tree.
(define (add-to-existing-children in-titles make-panel banger)
(let loop ([children ppanels]
[title (car in-titles)]
[titles (cdr in-titles)]
[banger banger])
(cond
[(null? children)
(banger (build-new-subtree (cons title titles) make-panel))]
[else
(let ([child (car children)])
(if (string=? (ppanel-name child) title)
(cond
[(null? titles)
(error 'add-child "child already exists with this path: ~e" in-titles)]
[(ppanel-leaf? child)
(error 'add-child "new child's path conflicts with existing path: ~e" in-titles)]
[else
(loop
(ppanel-interior-children child)
(car titles)
(cdr titles)
(lambda (x)
(set-ppanel-interior-children!
(cons
x
(ppanel-interior-children child)))))])
(loop
(cdr children)
title
titles
(lambda (x)
(set-cdr! children
(cons x (cdr children)))))))])))
;; build-new-subtree : (cons string (listof string)) (panel -> panel) -> ppanel
(define (build-new-subtree titles make-panel)
(let loop ([title (car titles)]
[titles (cdr titles)])
(cond
[(null? titles) (make-ppanel-leaf title #f make-panel)]
[else
(make-ppanel-interior
title
#f
(list (loop (car titles) (cdr titles))))])))
(define (hide-dialog)
(when preferences-dialog
(send preferences-dialog show #f)))
(define (show-dialog)
(save)
(if preferences-dialog
(send preferences-dialog show #t)
(set! preferences-dialog
(make-preferences-dialog))))
(define (add-can-close-dialog-callback cb)
(set! can-close-dialog-callbacks
(cons cb can-close-dialog-callbacks)))
(define (add-on-close-dialog-callback cb)
(set! on-close-dialog-callbacks
(cons cb on-close-dialog-callbacks)))
(define on-close-dialog-callbacks null)
(define can-close-dialog-callbacks null)
(define (make-preferences-dialog)
(letrec ([stashed-prefs (get-preference main-preferences-symbol (lambda () null))]
[frame-stashed-prefs%
(class frame:basic%
(rename [super-show show])
(define/override (show on?)
(when on?
(set! stashed-prefs
(get-preference main-preferences-symbol
(lambda () null))))
(super-show on?))
(super-instantiate ()))]
[frame
(make-object frame-stashed-prefs%
(string-constant preferences))]
[build-ppanel-tree
(lambda (ppanel tab-panel single-panel)
(send tab-panel append (ppanel-name ppanel))
(cond
[(ppanel-leaf? ppanel)
((ppanel-leaf-maker ppanel) single-panel)]
[(ppanel-interior? ppanel)
(let-values ([(tab-panel single-panel) (make-tab/single-panel single-panel #t)])
(for-each
(lambda (ppanel) (build-ppanel-tree ppanel tab-panel single-panel))
(ppanel-interior-children ppanel)))]))]
[make-tab/single-panel
(lambda (parent inset?)
(letrec ([spacer (and inset?
(instantiate vertical-panel% ()
(parent parent)
(border 10)))]
[tab-panel (instantiate tab-panel% ()
(choices null)
(parent (if inset? spacer parent))
(callback (lambda (_1 _2)
(tab-panel-callback
single-panel
tab-panel))))]
[single-panel (instantiate panel:single% ()
(parent tab-panel))])
(values tab-panel single-panel)))]
[tab-panel-callback
(lambda (single-panel tab-panel)
(send single-panel active-child
(list-ref (send single-panel get-children)
(send tab-panel get-selection))))]
[panel (make-object vertical-panel% (send frame get-area-container))]
[_ (let-values ([(tab-panel single-panel) (make-tab/single-panel panel #f)])
(for-each
(lambda (ppanel)
(build-ppanel-tree ppanel tab-panel single-panel))
ppanels)
(let ([single-panel-children (send single-panel get-children)])
(unless (null? single-panel-children)
(send single-panel active-child (car single-panel-children))
(send tab-panel set-selection 0)))
(send tab-panel focus))]
[bottom-panel (make-object horizontal-panel% panel)]
[ok-callback (lambda args
(when (andmap (lambda (f) (f))
can-close-dialog-callbacks)
(for-each
(lambda (f) (f))
on-close-dialog-callbacks)
(save)
(hide-dialog)))]
[cancel-callback (lambda (_1 _2)
(hide-dialog)
(install-stashed-preferences stashed-prefs))])
(gui-utils:ok/cancel-buttons
bottom-panel
ok-callback
cancel-callback)
(make-object grow-box-spacer-pane% bottom-panel)
(send* bottom-panel
(stretchable-height #f)
(set-alignment 'right 'center))
(send frame show #t)
frame))
(define (add-to-scheme-checkbox-panel f)
(set! scheme-panel-procs
(let ([old scheme-panel-procs])
(lambda (parent) (old parent) (f parent)))))
(define (add-to-editor-checkbox-panel f)
(set! editor-panel-procs
(let ([old editor-panel-procs])
(lambda (parent) (old parent) (f parent)))))
(define (add-to-warnings-checkbox-panel f)
(set! warnings-panel-procs
(let ([old warnings-panel-procs])
(lambda (parent) (old parent) (f parent)))))
(define scheme-panel-procs void)
(define editor-panel-procs void)
(define warnings-panel-procs void)
(define (add-checkbox-panel label proc)
(add-panel
label
(lambda (parent)
(let* ([main (make-object vertical-panel% parent)])
(send main set-alignment 'left 'center)
(proc main)
main))))
;; make-check : panel symbol string (boolean -> any) (any -> boolean)
;; adds a check box preference to `main'.
(define (make-check main pref title bool->pref pref->bool)
(let* ([callback
(lambda (check-box _)
(set pref (bool->pref (send check-box get-value))))]
[pref-value (get pref)]
[initial-value (pref->bool pref-value)]
[c (make-object check-box% title main callback)])
(send c set-value initial-value)
(add-callback pref
(lambda (p v)
(send c set-value (pref->bool v))))))
(define (make-recent-items-slider parent)
(let ([slider (instantiate slider% ()
(parent parent)
(label (string-constant number-of-open-recent-items))
(min-value 1)
(max-value 100)
(init-value (get 'framework:recent-max-count))
(callback (lambda (slider y)
(set 'framework:recent-max-count
(send slider get-value)))))])
(add-callback
'framework:recent-max-count
(lambda (p v)
(send slider set-value v)))))
(define (add-scheme-checkbox-panel)
(letrec ([add-scheme-checkbox-panel
(lambda ()
(set! add-scheme-checkbox-panel void)
(add-checkbox-panel
(list
(string-constant editor-prefs-panel-label)
(string-constant scheme-prefs-panel-label))
(lambda (scheme-panel)
(make-check scheme-panel
'framework:highlight-parens
(string-constant highlight-parens)
values values)
(make-check scheme-panel
'framework:fixup-parens
(string-constant fixup-parens)
values values)
(make-check scheme-panel
'framework:paren-match
(string-constant flash-paren-match)
values values)
(scheme-panel-procs scheme-panel)
(make-highlight-color-choice scheme-panel))))])
(add-scheme-checkbox-panel)))
(define (make-highlight-color-choice panel)
(let* ([hp (instantiate horizontal-panel% ()
(parent panel)
(stretchable-height #f))]
[msg (make-object message% (string-constant paren-match-color) hp)]
[scheme-higlight-canvas (make-object scheme-highlight-canvas% hp)]
[button (make-object button%
(string-constant choose-color)
hp
(lambda (x y) (change-highlight-color panel)))])
(void)))
(define scheme-highlight-canvas%
(class canvas%
(inherit get-client-size get-dc)
(define/override (on-paint)
(do-draw (get 'framework:paren-match-color)))
(define/public (do-draw color)
(let ([dc (get-dc)])
(send dc set-pen (send the-pen-list find-or-create-pen
color
1
'solid))
(send dc set-brush (send the-brush-list find-or-create-brush
color
'solid))
(let-values ([(w h) (get-client-size)])
(send dc draw-rectangle 0 0 w h))))
(super-instantiate ())
(inherit stretchable-width min-width)
(add-callback
'framework:paren-match-color
(lambda (p v)
(do-draw v)))))
(define (change-highlight-color parent)
(let ([new-color
(get-color-from-user (string-constant choose-paren-highlight-color)
(send parent get-top-level-window)
(get 'framework:paren-match-color))])
(when new-color
(set 'framework:paren-match-color new-color))))
(define (add-editor-checkbox-panel)
(letrec ([add-editor-checkbox-panel
(lambda ()
(set! add-editor-checkbox-panel void)
(add-checkbox-panel
(list (string-constant editor-prefs-panel-label)
(string-constant general-prefs-panel-label))
(lambda (editor-panel)
(make-recent-items-slider editor-panel)
(make-check editor-panel
'framework:autosaving-on?
(string-constant auto-save-files)
values values)
(make-check editor-panel 'framework:backup-files? (string-constant backup-files) values values)
(make-check editor-panel 'framework:delete-forward? (string-constant map-delete-to-backspace)
not not)
(make-check editor-panel 'framework:show-status-line (string-constant show-status-line) values values)
(make-check editor-panel 'framework:col-offsets (string-constant count-columns-from-one) values values)
(make-check editor-panel
'framework:display-line-numbers
(string-constant display-line-numbers)
values values)
(make-check editor-panel
'framework:auto-set-wrap?
(string-constant wrap-words-in-editor-buffers)
values values)
(make-check editor-panel
'framework:search-using-dialog?
(string-constant separate-dialog-for-searching)
values values)
(make-check editor-panel
'framework:open-here?
(string-constant reuse-existing-frames)
values values)
(make-check editor-panel
'framework:menu-bindings
(string-constant enable-keybindings-in-menus)
values values)
(unless (eq? (system-type) 'unix)
(make-check editor-panel
'framework:print-output-mode
(string-constant automatically-to-ps)
(lambda (b)
(if b 'postscript 'standard))
(lambda (n) (eq? 'postscript n))))
(editor-panel-procs editor-panel))))])
(add-editor-checkbox-panel)))
(define (add-warnings-checkbox-panel)
(letrec ([add-warnings-checkbox-panel
(lambda ()
(set! add-warnings-checkbox-panel void)
(add-checkbox-panel
(string-constant warnings-prefs-panel-label)
(lambda (warnings-panel)
(make-check warnings-panel
'framework:verify-change-format
(string-constant ask-before-changing-format)
values values)
(make-check warnings-panel
'framework:verify-exit
(string-constant verify-exit)
values values)
(warnings-panel-procs warnings-panel))))])
(add-warnings-checkbox-panel)))
(define (local-add-font-panel)
(let* ([font-families-name/const
(list (list "Default" 'default)
(list "Decorative" 'decorative)
(list "Modern" 'modern)
(list "Roman" 'roman)
(list "Script" 'script)
(list "Swiss" 'swiss))]
[font-families (map car font-families-name/const)]
[font-size-entry "defaultFontSize"]
[font-default-string "Default Value"]
[font-default-size (case (system-type)
[(windows) 10]
[(macosx) 13]
[else 12])]
[font-section "mred"]
[build-font-entry (lambda (x) (string-append "Screen" x "__"))]
[font-file (find-graphical-system-path 'setup-file)]
[build-font-preference-symbol
(lambda (family)
(string->symbol (string-append "framework:" family)))]
[set-default
(lambda (build-font-entry default pred)
(lambda (family)
(let ([name (build-font-preference-symbol family)]
[font-entry (build-font-entry family)])
(set-default name
default
(cond
[(string? default) string?]
[(number? default) number?]
[else (error 'internal-error.set-default "unrecognized default: ~a~n" default)]))
(add-callback
name
(lambda (p new-value)
(write-resource
font-section
font-entry
(if (and (string? new-value)
(string=? font-default-string new-value))
""
new-value)
font-file))))))])
(for-each (set-default build-font-entry font-default-string string?)
font-families)
((set-default (lambda (x) x)
font-default-size
number?)
font-size-entry)
(add-panel
(string-constant default-fonts)
(lambda (parent)
(letrec ([font-size-pref-sym (build-font-preference-symbol font-size-entry)]
[ex-string (string-constant font-example-string)]
[main (make-object vertical-panel% parent)]
[fonts (cons font-default-string (get-face-list))]
[make-family-panel
(lambda (name)
(let* ([pref-sym (build-font-preference-symbol name)]
[family-const-pair (assoc name font-families-name/const)]
[edit (make-object text%)]
[_ (send edit insert ex-string)]
[set-edit-font
(lambda (size)
(let ([delta (make-object style-delta% 'change-size size)]
[face (get pref-sym)])
(if (and (string=? face font-default-string)
family-const-pair)
(send delta set-family (cadr family-const-pair))
(send delta set-delta-face (get pref-sym)))
(send edit change-style delta 0 (send edit last-position))))]
[horiz (make-object horizontal-panel% main '(border))]
[label (make-object message% name horiz)]
[message (make-object message%
(let ([b (box "")])
(if (and (get-resource
font-section
(build-font-entry name)
b)
(not (string=? (unbox b)
"")))
(unbox b)
font-default-string))
horiz)]
[button
(make-object button%
(string-constant change-font-button-label)
horiz
(lambda (button evt)
(let ([new-value
(get-choices-from-user
(string-constant fonts)
(format (string-constant choose-a-new-font)
name)
fonts)])
(when new-value
(set pref-sym (list-ref fonts (car new-value)))
(set-edit-font (get font-size-pref-sym))))))]
[canvas (make-object editor-canvas% horiz
edit
(list 'hide-hscroll
'hide-vscroll))])
(set-edit-font (get font-size-pref-sym))
(add-callback
pref-sym
(lambda (p new-value)
(send horiz change-children
(lambda (l)
(let ([new-message (make-object message%
new-value
horiz)])
(set! message new-message)
(update-message-sizes font-message-get-widths
font-message-user-min-sizes)
(list label
new-message
button
canvas))))))
(send canvas set-line-count 1)
(vector set-edit-font
(lambda () (send message get-width))
(lambda (width) (send message min-width width))
(lambda () (send label get-width))
(lambda (width) (send label min-width width)))))]
[set-edit-fonts/messages (map make-family-panel font-families)]
[collect (lambda (n) (map (lambda (x) (vector-ref x n))
set-edit-fonts/messages))]
[set-edit-fonts (collect 0)]
[font-message-get-widths (collect 1)]
[font-message-user-min-sizes (collect 2)]
[category-message-get-widths (collect 3)]
[category-message-user-min-sizes (collect 4)]
[update-message-sizes
(lambda (gets sets)
(let ([width (foldl (lambda (x l) (max l (x))) 0 gets)])
(for-each (lambda (set) (set width)) sets)))]
[size-panel (make-object horizontal-panel% main '(border))]
[initial-font-size
(let ([b (box 0)])
(if (get-resource font-section
font-size-entry
b)
(unbox b)
font-default-size))]
[size-slider
(make-object slider%
(string-constant font-size-slider-label)
1 127
size-panel
(lambda (slider evt)
(set font-size-pref-sym (send slider get-value)))
initial-font-size)])
(update-message-sizes font-message-get-widths font-message-user-min-sizes)
(update-message-sizes category-message-get-widths category-message-user-min-sizes)
(add-callback
font-size-pref-sym
(lambda (p value)
(for-each (lambda (f) (f value)) set-edit-fonts)
(unless (= value (send size-slider get-value))
(send size-slider set-value value))
#t))
(for-each (lambda (f) (f initial-font-size)) set-edit-fonts)
(make-object message% (string-constant restart-to-see-font-changes) main)
main))))
(set! local-add-font-panel void))
(define (add-font-panel) (local-add-font-panel)))))