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racket/gui: get get-scroll-pos', etc., arguments for canvas%'

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This commit is contained in:
Matthew Flatt 2012-09-02 10:03:58 -06:00
parent 9f9f91207f
commit 19b2ee5e90
1 changed files with 13 additions and 6 deletions
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19
collects/mred/private/mrcanvas.rkt
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@ -204,12 +204,19 @@
(when y-on? (unless has-y? (bad "vertical" 'vscroll)))
(send wx show-scrollbars x-on? y-on?)))
(define get-scroll-pos (entry-point (lambda (d) (send wx get-scroll-pos d))))
(define set-scroll-pos (entry-point (lambda (d v) (send wx set-scroll-pos d v))))
(define get-scroll-range (entry-point (lambda (d) (send wx get-scroll-range d))))
(define set-scroll-range (entry-point (lambda (d v) (send wx set-scroll-range d v))))
(define get-scroll-page (entry-point (lambda (d) (send wx get-scroll-page d))))
(define set-scroll-page (entry-point (lambda (d v) (send wx set-scroll-page d v))))
(define/private (check-scroll name d v must-positive?)
(unless (or (eq? d 'horizontal) (eq? d 'vertical))
(raise-argument-error (who->name `(method canvas% ,name)) "(or/c 'horizontal 'vertical)" d))
(let ([bottom (if must-positive? 1 0)])
(unless (<= bottom v 10000000)
((check-bounded-integer bottom 10000000 #f) `(method canvas% ,name) v))))
(define get-scroll-pos (entry-point (lambda (d) (check-scroll 'get-scroll-pos d 1 #f) (send wx get-scroll-pos d))))
(define set-scroll-pos (entry-point (lambda (d v) (check-scroll 'set-scroll-pos d v #f) (send wx set-scroll-pos d v))))
(define get-scroll-range (entry-point (lambda (d) (check-scroll 'get-scroll-range d 1 #f) (send wx get-scroll-range d))))
(define set-scroll-range (entry-point (lambda (d v) (check-scroll 'set-scroll-range d v #f) (send wx set-scroll-range d v))))
(define get-scroll-page (entry-point (lambda (d) (check-scroll 'get-scroll-page d 1 #t) (send wx get-scroll-page d))))
(define set-scroll-page (entry-point (lambda (d v) (check-scroll 'set-scroll-page d v #t) (send wx set-scroll-page d v))))
(public get-scroll-pos set-scroll-pos
get-scroll-range set-scroll-range
get-scroll-page set-scroll-page)