259 lines
8.8 KiB
Scheme
259 lines
8.8 KiB
Scheme
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(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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;; min-w, min-h : number -> contract
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;; determines if the widths and heights are suitable
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(define (min-w h) (flat-named-contract "draw-button-label-width" (lambda (w) (w . > . (- h (* 2 border-inset))))))
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(define (min-h w) (flat-named-contract "draw-button-label-height" (lambda (h) (h . > . (* 2 border-inset)))))
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(provide/contract
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(pad-xywh (number? number? (>=/c 0) (>=/c 0) . -> . (values number? number? (>=/c 0) (>=/c 0))))
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(draw-button-label
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(->r ([dc (is-a?/c dc<%>)]
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[label (union false/c string?)]
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[x number?]
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[y number?]
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[w (and/c number? (min-w h))]
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[h (and/c number? (min-h w))]
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[mouse-over? boolean?]
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[grabbed? boolean?])
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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 refresh)
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(define paths #f)
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;; label : string
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(init-field [label (string-constant untitled)])
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(define full-name-window #f)
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(define mouse-grabbed? #f)
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(define mouse-over? #f)
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(define/public (on-choose-directory dir)
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(void))
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;; set-message : boolean (union #f path string) -> void
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;; if file-name? is #t, path-name should be a path (or #f)
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;; if file-name? is #f, path-name should be a string (or #f)
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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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(map path->string (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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(refresh))))
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(define/public (fill-popup menu reset)
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(if (and paths (not (null? paths)))
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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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(reset)
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(on-choose-directory (apply build-path (reverse paths)))))
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(loop (cdr paths))]))
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(let ([i (make-object menu-item%
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(string-constant no-full-name-since-not-saved)
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menu void)])
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(send i enable #f))))
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(define/override (on-event evt)
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(let-values ([(max-x max-y) (get-size)])
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(let ([inside? (and (not (send evt leaving?))
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(<= 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? mouse-over?)
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(set! mouse-over? inside?)
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(refresh))))
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(cond
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[(send evt button-down?)
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(let-values ([(width height) (get-size)]
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[(reset) (lambda ()
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(set! mouse-grabbed? #f)
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(set! mouse-over? #f)
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(refresh))])
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(set! mouse-over? #t)
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(set! mouse-grabbed? #t)
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(let ([menu (make-object popup-menu% #f
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(lambda x
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(reset)))])
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(fill-popup menu reset)
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;; Refresh the screen (wait for repaint)
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(set! paint-sema (make-semaphore))
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(refresh)
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(yield paint-sema)
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(set! paint-sema #f)
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;; Popup menu
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(popup-menu menu
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0
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height)))]))
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(define paint-sema #f)
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(inherit get-parent)
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(define/private (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/override (on-paint)
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(when paint-sema
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(semaphore-post paint-sema))
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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 0 0 w h mouse-over? mouse-grabbed?)))))
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(super-new [style '(transparent)])
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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 small-control-font)
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(define button-label-inset 1)
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(define black-color (make-object color% "BLACK"))
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(define triangle-width 10)
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(define triangle-height 14)
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(define triangle-color (make-object color% 50 50 50))
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(define border-inset 1)
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(define triangle-space 0)
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(define circle-spacer 4)
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(define rrect-spacer 3)
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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 mouse-over-color (case (system-type)
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[(macosx) "darkgray"]
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[else (make-object color% 230 230 230)]))
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(define mouse-grabbed-color (make-object color% 100 100 100))
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(define grabbed-fg-color (make-object color% 220 220 220))
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(define (calc-button-min-sizes dc label)
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(let-values ([(w h a d) (send dc get-text-extent label button-label-font)])
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(let-values ([(px py pw ph) (pad-xywh 0 0 w h)])
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(values pw ph))))
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(define (pad-xywh tx ty tw th)
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(let* ([ans-h
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(+ button-label-inset
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(max 0
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(+ 2 (inexact->exact (ceiling th)))
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(+ 2 triangle-height))
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button-label-inset)]
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[ans-w
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(max
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(+ ans-h ans-h)
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(+ circle-spacer
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button-label-inset
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1 ;; becuase "(define ...)" has the wrong size under windows
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(max 0 (inexact->exact (ceiling tw)))
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triangle-space
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triangle-width
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circle-spacer
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button-label-inset))])
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(values
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(- tx (quotient (- ans-w tw) 2))
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(- ty (quotient (- ans-h th) 2))
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ans-w
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ans-h)))
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(define (draw-button-label dc label dx dy w h mouse-over? grabbed?)
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(when (or mouse-over? grabbed?)
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(let ([color (if grabbed?
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mouse-grabbed-color
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mouse-over-color)]
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[xh (- h (* 2 border-inset))])
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(case (system-type)
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[(macosx)
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(send dc set-pen (send the-pen-list find-or-create-pen color 1 'solid))
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(send dc set-brush (send the-brush-list find-or-create-brush color 'solid))
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(let ([old-smooth (send dc get-smoothing)])
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(send dc set-smoothing 'aligned)
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(send dc draw-ellipse (+ dx border-inset) (+ dy border-inset) xh xh)
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(send dc draw-ellipse (+ dx (- w xh)) (+ dy border-inset) xh xh)
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(send dc set-smoothing old-smooth))
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(send dc set-pen (send the-pen-list find-or-create-pen "black" 1 'transparent))
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(send dc draw-rectangle (+ dx (quotient xh 2)) (+ dy border-inset) (- w xh) xh)
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(send dc set-pen (send the-pen-list find-or-create-pen color 1 'solid))
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(send dc draw-line
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(+ dx (quotient xh 2))
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(+ dy border-inset)
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(+ dx (- w (quotient xh 2)))
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(+ dy border-inset))
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(send dc draw-line
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(+ dx (quotient xh 2))
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(+ dy (- h 1 border-inset))
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(+ dx (- w (quotient xh 2)))
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(+ dy (- h 1 border-inset)))]
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[else
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(send dc set-pen (send the-pen-list find-or-create-pen triangle-color 1 'solid))
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(send dc set-brush (send the-brush-list find-or-create-brush color 'solid))
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(send dc draw-rounded-rectangle (+ dx rrect-spacer) (+ dy border-inset) (- w border-inset rrect-spacer) xh 2)])))
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(when label
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(send dc set-text-foreground (if grabbed? grabbed-fg-color black-color))
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(send dc set-font button-label-font)
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(let-values ([(tw th _1 _2) (send dc get-text-extent label)])
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(send dc draw-text label
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(+ dx (+ circle-spacer button-label-inset))
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(+ dy (- (/ h 2) (/ th 2)))
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#t)))
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(send dc set-pen (send the-pen-list find-or-create-pen
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(if grabbed? grabbed-fg-color triangle-color)
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1 'solid))
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(let ([x (- w triangle-width circle-spacer)]
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[y (- (/ h 2) (/ triangle-height 2))])
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(let loop ([x-off 0][off-y 5])
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(unless (= 5 x-off)
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(send dc draw-line
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(+ dx (+ x 1 x-off))
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(+ dy (+ y off-y))
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(+ dx (+ x (- triangle-width 1 x-off)))
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(+ dy (+ y off-y)))
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(loop (+ x-off 1) (+ off-y 1)))))
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(void)))
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