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http://www.openoffice.org/issues/show_bug.cgi?id=72727
User arccoyote changed the following:
What |Old value |New value
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Status|CLOSED |UNCONFIRMED
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Priority|P4 |P3
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Resolution|INVALID |
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Summary|Intellipoint 6.1 = bad scr|Intellipoint 6.1 scroll wh
|oll wheel behavior |eel behavior
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Subcomponent|ui |code
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Target milestone|OOo Later |not determined
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Version|OOo 2.1 |OOo 2.2.1
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------- Additional comments from [EMAIL PROTECTED] Wed Aug 1 11:16:16 +0000
2007 -------
Did a little digging and this is probably a valid issue. The problem isn't a bug
in IP6.1, per se, but rather how IP6.1 changes the mousewheel behavior.
This bug also affects some mice natively (no Intellipoint installed)
The issue is how OO handles the delta values being sent in WM_MOUSEWHEEL. MS
initially dictated a value of +/- 120 per wheel detent, to allow for future
higher-resolution wheels. As it happened, Microsoft developed the free-spinning
"tiltwheel" which produces delta values proportional to the rotation speed.
-Slowly rotating the wheel will produce frequent messages with low delta values.
-Quickly spinning the wheel will produce higher delta values, but possibly less
messages.
Applications are supposed either use the variable delta to determine how to
scroll or accumulate delta until +/- 120 is reached (equivalent to one detent of
a traditional wheel)
This is documented here: http://msdn2.microsoft.com/en-us/library/ms645617.aspx
As far as I can tell, OO is ignoring deltas < +/- 120
The issue with Intellipoint arises when it installs the HID filter driver
(point32k.sys). Natively, most mice (even tiltwheel) report a fixed delta +/-
120 per wheel event. After the filter is installed, variable deltas are
generated by tiltwheels and cause problems with OO (and some other apps, such as
iTunes...)
Some mice (MS Wireless Laser 6000 for example) natively report lower deltas and
will have problems even if Intellipoint is not installed. There is no workaround
for these mice.
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