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win32: ignore inapplicable WM_HSCROLL and WM_VSCROLL events

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original commit: 342964b10a7fe95f648f2d652518786b4ebf5ddb
This commit is contained in:
Matthew Flatt 2011-04-03 15:17:10 -06:00
parent 9722fe9427
commit cca9680f76
1 changed files with 4 additions and 2 deletions
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6
collects/mred/private/wx/win32/canvas.rkt
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@ -219,10 +219,12 @@
1)
(default w msg wParam lParam))]
[(= msg WM_HSCROLL)
(on-scroll-change SB_HORZ (LOWORD wParam))
(when hscroll?
(on-scroll-change SB_HORZ (LOWORD wParam)))
0]
[(= msg WM_VSCROLL)
(on-scroll-change SB_VERT (LOWORD wParam))
(when vscroll?
(on-scroll-change SB_VERT (LOWORD wParam)))
0]
[else (super wndproc w msg wParam lParam default)]))