0003721: [FIX] Wheel Scrolling Misbehavior in Win32 with Genius Mouse Driver

Viewing Issue Simple Details [ Jump to Notes ]

[ View Advanced ] [ Issue History ] [ Print ]

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

0006671

closed

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

Mantis 1.0.8[^]

46 total queries executed.
33 unique queries executed.