54212 - Trees still get out of sync

Status: VERIFIED DUPLICATE of bug 54049

(Core :: XUL, defect, P3)

Description

[selmer (gone)]

9/26 09 mn6

goto the mail 3 pane and select some message in the middle of the list.  grab
the scroll bar and just move it up and down for a while (maybe 10 times each
way.)  Click on the message just above the message you previously selected.

Result: 2 message are now highlighted and the subjects become off-by-one.  In
addition, if you do this near the end of the list you'll get an unselectable
item as the last list element.

Comment 1

[selmer (gone)]

Granted, it's not likely people will do this, but it indicates there's an
underlying scrolling problem that can be reproduced.  nom rtm.

Comment 2

[selmer (gone)]

Not sure if it's related, but just scrolling slowly can cause painting problems.
 When I did this, I got a line that was 99% blank and only the last couple rows
of pixels were painted.  It seems to only happen when the display "jumps", that
is, when you start scrolling and a bunch of whitespace is shown and a pause
happens before it fills in.  Oftentimes, the item that was at the bottom of the
scroll area is the one that gets whacky.

Comment 3

[selmer (gone)]

On win98, almost all forms of scrolling results in a blank row somewhere.  Slow
scrolling gave me an even wierder result:

item 1
...
item n
blank row
item n _again_
...

Comment 4

[selmer (gone)]

Peter, this bug seems to be distinct from 51084 (which was fixed on 9/20.)

Comment 5

[selmer (gone)]

Since 54049 is already reviewed and partially approved, I'm going to dup this
one against that one rather than the reverse.


*** This bug has been marked as a duplicate of 54049 ***

Comment 6

[Stephen Walker]

vrfy dup