392200 - clicking scroll arrow, dragging mouse off and back onto arrow starts, stops, but does not resume scrolling

Status: NEW

(Core :: XUL, defect)

Description

[timeless]

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a8pre) Gecko/200708070505 Minefield/3.0a8pre

Testcase:
1. load a page or document that's at least a couple of pages long.
2. make sure the scrollbar thumb is at the top of the track.
3. click and hold on the down scroll arrow.
3' watch the thumb start moving down
4. drag mouse (without releasing left button...) off scroll button
4' thumb should stop moving
5. drag mouse back over scroll button

Expected results:
thumb should resume moving.

Actual results:
thumb does not resume moving.

Variations:
1. run notepad and open %systemroot%\system32\eula.txt
2. make sure the scrollbar thumb is at the top of the track.
3. click and hold on the down scroll arrow.
3' watch the thumb start moving down
4. drag mouse (without releasing left button...) off scroll button
4' thumb should stop moving
5. drag mouse back over scroll button
5' thumb should resume moving.

1. run explorer and open %systemroot%\system32 (view>details and if necessary click "show all files" or whatever the link is to get the normal view)
2. make sure the scrollbar thumb is at the top of the track.
3. click and hold on the down scroll arrow.
3' watch the thumb start moving down
4. drag mouse (without releasing left button...) off scroll button
4' thumb should stop moving
5. drag mouse back over scroll button
5' thumb should resume moving.

Also tested: MS Outlook 2003 (same wXPsp2 box).
Opera 8 and Opera 9 on Linux.

Known quirks:
most gtk apps seem to ignore mouse out. I don't really care about Linux, (or gtk apps for that matter). I'm only filing this about Windows, but as I'm working with Linux, I would not cry if we had the same behavior as Windows.

As is, our behavior is universally bad/wrong (well, I'll test OS X if I go home).

Comment 1

[Martijn Wargers (dead)]

Duplicate of bug 41577?