670090 - Don't override system default for (vertical) mouse scrolling

Status: NEW

(SeaMonkey :: Preferences, defect)

Description

[Raj Bhaskar]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0.1) Gecko/20110608 Firefox/4.0.1 SeaMonkey/2.1
Build ID: 20110608021133

Steps to reproduce:

From Gecko 1.9.2 (visible in SeaMonkey 2.1) onwards, bug 513817 overrides the system default scrolling using a mouse wheel in Windows to match Chrome.

SeaMonkey has a pref that explicitly says to use the system default for the number of lines scrolled when using the mouse wheel.  This is now being ignored because of the new default.

This is controlled by the pref "mousewheel.system_scroll_override_on_root_content.enabled".  I believe that in SeaMonkey, this should default to false.

See also http://forums.mozillazine.org/viewtopic.php?f=3&t=2246033


Actual results:

Each "clicky" of the scroll wheel scrolls the page by six lines.


Expected results:

Each "clicky" of the scroll wheel should scroll the page by the system default number of lines.

Comment 1

[therube]

Confirmed.

Comment 2

[David E. Ross]

Windows XP SP3
Mozilla/5.0 (Windows NT 5.1; rv:2.0.1) Gecko/20110608 SeaMonkey/2.1

I am not seeing this problem.  I have mousewheel.system_scroll_override_on_root_content.enabled set to "true".  With no modifier key, vertical scrolling is set to use system default, which is 1 line.  I do get only one line of scrolling when using the mouse wheel.  

Is it possible that the situation is affected by the Windows version?

Comment 3

[Raj Bhaskar]

@David: I've got no idea, but there wasn't anything obvious in bug 513817, which added the new behaviour.

Comment 4

[[e-mail]]

(In reply to comment #2)
> I am not seeing this problem.  I have
> mousewheel.system_scroll_override_on_root_content.enabled set to "true". 
> With no modifier key, vertical scrolling is set to use system default, which
> is 1 line.  I do get only one line of scrolling when using the mouse wheel.  
The override only affects users who haven't changed the Windows default of 3.

Comment 5

[David E. Ross]

In Windows XP SP3, I have my Control Panel/Mouse settings for Scroller:Scrolling Size: 1 line.  

My [Preferences > Advanced > Mouse Wheel] is set under "Vertical Scrolling" with the "Scroll the document by" radio button selected and the "Use system default" checkbox checked.  

With SeaMonkey 2.2, my scroll wheel does a vertical scroll of exactly one line.