57941 - Animated GIF in combobox causes scrollbar flickering in forms

Status: RESOLVED WORKSFORME

(Core :: XUL, defect, P3)

Description

[Christian Mattar]

Open the attached testcase (it is derived from Test #16).

Open the right combobox with the animated gif in it.

Now observe the scrollbar of the left listbox. It's flickering between enabled 
and disabled state.
It seems like the animation of the GIF triggers a repopulation of the listbox.
Since this is not happening if the GIF is outside the combobox, this is probably 
an XPToolkit issue, not an Imagelib one. 

I am using build 2000101620 on Win98.

Comment 1

[Christian Mattar]

Attachment: GIF-file for testcase

Comment 2

[Christian Mattar]

Attachment: Testcase showing problem

Comment 3

[Christian Mattar]

Whoops, forgot finishing the summary.

Comment 4

[Christian Mattar]

You should wait until the testcase is completely loaded before you open the 
combobox, or else you'll see the effects of bug 57944.

Comment 5

[Peter Trudelle]

->evaughan/future.  looks to me like it is just getting a flashing thumb.
Doesn't happen on Linux.  Seems to be other problems getting the second combobox
to popup, doesn't happen for me until second click. Is that reported?

Comment 6

[Christian Mattar]

I have no problems opening the combobox with one click

Comment 7

[Jesse Ruderman]

I think there are three bugs here:
- animated image causes reflow once per animation loop. (probably bug 60880)
- <select>'s scrollbar flickers on reflow, showing a bogus thumb for a split-
second.
- animated image is sometimes animated when not visible.

Comment 8

[basic]

looks like fixed to me (on build 2001102903 win32)

Comment 9

[Christian Mattar]

It's been a long time since I filed this bug, but it looks fine to me, too.

Marking Worksforme.