251941 - listbox vertical scrollbar is being misplaced

Status: RESOLVED EXPIRED

(Core :: XUL, defect)

Description

[Mark Kaplun]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040626 Firefox/0.9.1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040626 Firefox/0.9.1

When there is a need to show a vertical scrollbar for a listbox it is rendered
at the right most edge of the content. Native listbox of windows draw the
scrollbar at the right edge of the viewing port.

In other words, the way the vertical scrollbar is handled now a user has to use
the horizontal scrollbar in order the get the vertical one into a view, while
the native listbox have it always in the view.

In an effort to find out where the location of the vertical scrollbar is set I
have reached the line "vRect.x = scrollBarRight ? scrollAreaRect.XMost() :
clientRect.x;" in function nsGfxScrollFrameInner::Layout in nsGfxScroll.cpp
IMHO scrollAreaRect.XMost() should be replaced by clientRect.XMost(), but when I
have done it I lost the scrollbar completely.

Reproducible: Always
Steps to Reproduce:
1.
2.
3.

Comment 1

[Mark Kaplun]

Attachment: listbox scrolled to the left, the vertical scrollbar not in view

Comment 2

[Mark Kaplun]

Attachment: After scrolling to the right the vertical scrollbar is finally at view

Comment 3

[Mark Kaplun]

Attachment: A native listbox

Comment 4

[R.K.Aa.]

dup of bug 55368?

Comment 5

[Mark Kaplun]

No. The scrollbars here do not disapear, they exist but they are invisible to 
the user if there is also a horizontal scrollbar. Unlike the native listbox in 
which the scrollbars are alway visible. 

Comment 6

[R.K.Aa.]

They exist in the other bug too - read the description and dups.
Resolving as dup.

*** This bug has been marked as a duplicate of 55368 ***

Comment 7

[Mark Kaplun]

This is a XUL bug, that was a theme bug, how can they be a duplicates of each 
other is beyond me. Reminds me that I have decided not to report XUL bugs, I 
wonder why I bothered to report this one.

Comment 8

[Mike Cowperthwaite]

Reporter is correct, this is not a dupe.

Comment 9

[[e-mail]]

If this is a XUL bug where is the XUL that demonstrates the bug?

Comment 10

[Mark Kaplun]

Attachment: xul of a list box wirt vert and horz scrollbars

And here is a XUL that demonstrates the problem. Launch it in a seperate
window, play with the window size to get a small viewable area, and then use
the horizontal scrollbar to scroll.

Comment 11

[Gervase Markham [:gerv]]

This is an automated message, with ID "auto-resolve01".

This bug has had no comments for a long time. Statistically, we have found that
bug reports that have not been confirmed by a second user after three months are
highly unlikely to be the source of a fix to the code.

While your input is very important to us, our resources are limited and so we
are asking for your help in focussing our efforts. If you can still reproduce
this problem in the latest version of the product (see below for how to obtain a
copy) or, for feature requests, if it's not present in the latest version and
you still believe we should implement it, please visit the URL of this bug
(given at the top of this mail) and add a comment to that effect, giving more
reproduction information if you have it.

If it is not a problem any longer, you need take no action. If this bug is not
changed in any way in the next two weeks, it will be automatically resolved.
Thank you for your help in this matter.

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Comment 12

[Gervase Markham [:gerv]]

This bug has been automatically resolved after a period of inactivity (see above
comment). If anyone thinks this is incorrect, they should feel free to reopen it.