216 lines
7.4 KiB
Scheme
216 lines
7.4 KiB
Scheme
(module name-message mzscheme
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(require (lib "string-constant.ss" "string-constants")
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(lib "class.ss")
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(lib "file.ss")
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(lib "list.ss")
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(lib "mred.ss" "mred")
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(lib "contract.ss"))
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(provide/contract
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(draw-button-label
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((is-a?/c dc<%>) (union false? string?) (>/c 5) (>/c 5) boolean?
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. -> .
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void?))
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(calc-button-min-sizes
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(->*
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((is-a?/c dc<%>) string?)
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(number? number?))))
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(provide name-message%)
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(define name-message%
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(class canvas%
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(inherit popup-menu get-dc get-size get-client-size min-width min-height
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stretchable-width stretchable-height
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get-top-level-window)
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(override on-event on-paint)
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(define/public (on-choose-directory dir)
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(void))
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(define paths #f)
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;; label : string
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(define label (string-constant untitled))
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;; set-message : boolean (union #f string) -> void
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(define/public (set-message file-name? path-name)
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(set! paths (if (and file-name?
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path-name
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(file-exists? path-name))
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(explode-path (normalize-path path-name))
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#f))
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(let ([new-label (cond
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[(and paths (not (null? paths)))
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(car (last-pair paths))]
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[path-name path-name]
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[else (string-constant untitled)])])
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(unless (equal? label new-label)
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(set! label new-label)
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(update-min-sizes)
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(on-paint))))
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(define full-name-window #f)
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(define mouse-grabbed? #f)
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(define (on-event evt)
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(cond
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[(and paths (not (null? paths)))
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(cond
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[(send evt button-down?)
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(let-values ([(width height) (get-client-size)])
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(set! inverted? #t)
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(on-paint)
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(let ([menu (make-object popup-menu% #f
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(lambda x
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(set! inverted? #f)
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(on-paint)))])
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(let loop ([paths (cdr (reverse paths))])
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(cond
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[(null? paths) (void)]
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[else
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(make-object menu-item% (car paths) menu
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(lambda (evt item)
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(on-choose-directory (apply build-path (reverse paths)))))
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(loop (cdr paths))]))
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(popup-menu menu
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0
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height)))]
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[else (void)])]
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[else
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(cond
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[(send evt moving?)
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(when mouse-grabbed?
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(let-values ([(max-x max-y) (get-size)])
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(let ([inside? (and (<= 0 (send evt get-x) max-x)
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(<= 0 (send evt get-y) max-y))])
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(unless (eq? inside? inverted?)
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(set! inverted? inside?)
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(on-paint)))))]
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[(send evt button-up? 'left)
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(set! mouse-grabbed? #f)
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(cond
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[inverted?
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(set! inverted? #f)
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(on-paint)
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(message-box
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(string-constant drscheme)
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(string-constant no-full-name-since-not-saved)
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(get-top-level-window))]
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[else
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(void)])]
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[(send evt button-down? 'left)
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(set! mouse-grabbed? #t)
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(set! inverted? #t)
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(on-paint)]
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[else (void)])]))
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(inherit get-parent)
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(define (update-min-sizes)
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(let-values ([(w h) (calc-button-min-sizes (get-dc) label)])
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(min-width w)
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(min-height h)
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(send (get-parent) reflow-container)))
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(define inverted? #f)
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(define (on-paint)
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(let ([dc (get-dc)])
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(let-values ([(w h) (get-client-size)])
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(when (and (> w 5) (> h 5))
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(draw-button-label dc label w h inverted?)))))
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(super-instantiate ())
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(update-min-sizes)
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(stretchable-width #f)
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(stretchable-height #f)))
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(define button-label-font
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(send the-font-list find-or-create-font
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(case (system-type)
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[(windows) 8]
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[(macosx) 10]
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[else 10])
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'decorative 'normal 'normal #f))
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(define button-label-inset 1)
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(define drop-shadow-size 2)
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(define black-color (make-object color% "BLACK"))
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(define (calc-button-min-sizes dc label)
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(send dc set-font button-label-font)
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(let-values ([(w h a d) (send dc get-text-extent label button-label-font)])
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(let ([ans-w
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(+ button-label-inset
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button-label-inset
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drop-shadow-size
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1 ;; for the outer drop shadow
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1 ;; becuase "(define ...)" has the wrong size under windows
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(max 0 (inexact->exact (ceiling w))))]
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[ans-h
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(+ button-label-inset button-label-inset
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drop-shadow-size
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1 ;; for the outer drop shadow
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(max 0 (inexact->exact (ceiling h))))])
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(values ans-w ans-h))))
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(define (offset-color color offset-one)
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(make-object color%
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(offset-one (send color red))
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(offset-one (send color green))
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(offset-one (send color blue))))
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(define light-button-color (offset-color (get-panel-background)
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(lambda (v) (floor (+ v (/ (- 255 v) 2))))))
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(define dark-button-color (offset-color (get-panel-background)
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(lambda (v) (floor (- v (/ v 2))))))
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(define (draw-button-label dc label w h inverted?)
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(send dc set-text-foreground black-color)
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(send dc set-text-background (get-panel-background))
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(send dc set-pen (send the-pen-list find-or-create-pen
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(get-panel-background) 1 'solid))
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(send dc set-brush (send the-brush-list find-or-create-brush
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(get-panel-background) 'solid))
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(send dc draw-rectangle 0 0 w h)
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(send dc set-pen (send the-pen-list find-or-create-pen
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"BLACK" 1 'solid))
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(send dc set-brush
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(send the-brush-list find-or-create-brush
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(if inverted? dark-button-color light-button-color) 'solid))
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(let ([border
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(lambda (d)
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(send dc draw-rectangle
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d d
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(- w drop-shadow-size)
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(- h drop-shadow-size)))])
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(if inverted?
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(let loop ([n 0])
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(cond
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[(= n drop-shadow-size) (void)]
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[else
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(border n)
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(loop (+ n 1))]))
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(let loop ([n drop-shadow-size])
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(cond
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[(zero? n) (void)]
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[else
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(border (- n 1))
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(loop (- n 1))]))))
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(when label
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(send dc set-font button-label-font)
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(let-values ([(tw th _2 _3) (send dc get-text-extent label)])
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;; 1 is for the outer drop shadow box
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(send dc draw-text label
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(+ button-label-inset
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(if inverted? drop-shadow-size 1))
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(+ button-label-inset
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(if inverted? drop-shadow-size 1))))))) |