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support general transformation matrix

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original commit: d7289c253f4e561a416a4dfa8c321f9effb4af26
This commit is contained in:
Matthew Flatt 2010-07-28 06:43:38 -05:00
parent e4ffd5e6c1
commit fb772f19e8
1 changed files with 19 additions and 2 deletions
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21
collects/tests/gracket/draw.rkt
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@ -226,7 +226,9 @@
[save-filename #f]
[save-file-format #f]
[clip 'none]
[current-alpha 1.0])
[current-alpha 1.0]
[current-rotation 0.0]
[current-skew? #f])
(send hp0 stretchable-height #f)
(send hp stretchable-height #f)
(send hp2.5 stretchable-height #f)
@ -965,6 +967,10 @@
(send dc start-page)
(send dc set-alpha current-alpha)
(send dc set-rotation current-rotation)
(send dc set-initial-matrix (if current-skew?
(vector 1 0 0.2 1 3 0)
(vector 1 0 0 1 0 0)))
(if clip-pre-scale?
(begin
@ -1243,7 +1249,18 @@
(unless (= a current-alpha)
(set! current-alpha a)
(send canvas refresh))))
10 '(horizontal plain))))
10 '(horizontal plain))
(make-object slider% "Rotation" 0 100 hp4
(lambda (s e)
(let ([a (* pi 1/4 (/ (send s get-value) 100.0))])
(unless (= a current-rotation)
(set! current-rotation a)
(send canvas refresh))))
0 '(horizontal plain))
(make-object check-box% "Skew" hp4
(lambda (c e)
(set! current-skew? (send c get-value))
(send canvas refresh)))))
(send f show #t))