456423 - Pixel scrolling (two-finger touchpad) poor diagonal scrolling

Status: RESOLVED FIXED

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[Simon Howes]

User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1b1pre) Gecko/20080922020341 Minefield/3.1b1pre
Build Identifier: 

Movement in a diagonal movement using two-finger gesture results a large jump to the left/right, then a large jump up/down, depeding on direction of gesture of course.  

Results not a smooth diagonal movement as expected.

Reproducible: Always

Comment 1

[Markus Stange [:mstange]]

There are two problems here:
 1. Our scroll events can only carry one axis. We split diagonal scroll
    gestures up and scroll separately in each axis.
 2. Scrolling is synchronous, bug 418351.

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

For 1. we could add some bit to the first event we dispatch and scroll only after
we get the second event.

Comment 3

[S Woodside]

I also have this, and only occurs when both vertical and horizontal scroll bars are visible/possible. Compare it with how smooth Safari is. Also, see bug 458554, in general the new pixel scrolling isn't as smooth as Safari.

Comment 4

[Markus Stange [:mstange]]

This was fixed by bug 457864 some time ago.