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ID Category Severity Reproducibility Date Submitted Last Update
0003721 [Squeak] VM minor always 05-26-06 15:06 12-29-07 03:32
Reporter VSV View Status public  
Assigned To andreas
Priority normal Resolution open  
Status assigned   Product Version
Summary 0003721: [FIX] Wheel Scrolling Misbehavior in Win32 with Genius Mouse Driver
Description If using the mouse wheel with any of "Genius NetScroll[+] [Optical] Mouse", scrolling works only down, scrolling up causes 'shaking' and/or scrolls down.
All current win32 VMs (including Croquet) are affected .
Additional Information In the "sqWin32Window.c" -> "MainWndProc", where the "WM_MOUSEWHEEL"
messages are translated to <ctrl-up> and <crtl-down> keystrokes (in
3.7.1 souces on line 0000218), the conditional expression is
"evt->charCode = (zDelta > 0) ? 30 : 31;", causing the zero to be
aligned as *negative* value.
The Genius driver in it's enhanced mode sends two messages for every wheel movement - first with maximal (+-120) and second with minimal zDelta-value, but the driver treats *zero* as the minimal positive value (-1 is the negative).
That may be also considered a bug, but the the fact is - zero *should
be* ever aligned as positive.

This can be easily fixed by reversing the condition to:
"evt->charCode = (zDelta < 0) ? 31 : 30;"
I'm using a fixed VM for several months and it works all right.

Attached is the fixed file from 3.7.1 sources.
Attached Files  sqWin32Window.c.gz [^] (22,952 bytes) 05-26-06 15:06

- Relationships
child of 0006671closed tim Build VMMaker for 3.9 

- Notes
(0005083 - 165 - 171 - 171 - 171 - 171 - 171)
VSV
05-26-06 15:13

I did't expect how the report form handles the $# character, there should be only a hint the line nuber is 218;
this issue has nothing to do with croquet bug 0218.
 

- Issue History
Date Modified Username Field Change
05-26-06 15:06 VSV New Issue
05-26-06 15:06 VSV File Added: sqWin32Window.c.gz
05-26-06 15:07 VSV Issue Monitored: VSV
05-26-06 15:13 VSV Note Added: 0005083
07-13-06 07:51 tim Status new => assigned
07-13-06 07:51 tim Assigned To  => tim
09-14-07 00:08 tim Relationship added child of 0006671
12-29-07 03:32 tim Assigned To tim => andreas


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