163577 - IFRAMEs flicker when scrolled and when parent window is resized

Status: VERIFIED FIXED

(Core :: Layout: Images, Video, and HTML Frames, defect, P3)

Description

[Thamer Mahmoud]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.1) Gecko/20020812
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.1) Gecko/20020812

It's happening to every iframe and can be reproduced in many ways.

Reproducible: Always

Steps to Reproduce:
1. Go to http://bugzilla.mozilla.org/enter_bug.cgi?product=Browser&format=guided
2. Wait for the iframe to load
3. scroll main window

or

1. Go to URL
2. Resize browser window and watch the iframe flickers


Actual Results:  
Flickery frames.

Expected Results:  
No flicker or redraw side effects (compare to IE6)

Comment 1

[David W. Jeske]

New Summary shoudl be: IFRAMEs flicker black on MS Windows during resize/redraw

This bug appears to only affect Mozilla/Win32. It does NOT affect Mozilla/Linux.

It is most obvious during resize/refresh of an iframe. Here is a much better
test case:

http://mozart.chat.net/~jeske/Projects/Mozilla/bugs/4.html

Comment 2

[Thamer Mahmoud]

changing summary

Comment 3

[Amarendra Hanumanula]

Works fine with trunk build: 2002-09-04-08 build on WIN2K. I do not see any 
flickering during window resizing.

Comment 4

[Thamer Mahmoud]

It's a redraw problem. The complexity of the IFrame content, as well as the
machine speed, are both factors of how severe this bug is. How fast is your
machine? 

I'm on a P3@500 and as soon as I have many programs open and many tabs in
Mozilla, I see *more* IFrame flickering. 

Also, this has been reported a couple of times already. (Bug 159893 and Bug 165551)

Comment 5

[Nick Lott]

Perhaps this should be a new bug, but I am seeing iframes as permanently black.
On the test URL above
(http://mozart.chat.net/~jeske/Projects/Mozilla/bugs/4.html) All three frames
are black, also on the bugzilla report page
(http://bugzilla.mozilla.org/enter_bug.cgi?product=Browser&format=guided) the
background is black but the foreground colours are correct.

BuildID 2002100108 on W2K

Comment 6

[José Jeria]

To see this flickering just view Mozillas own Demo on frames/iframes:
resource:///res/samples/test9.html
(/Debug/Viewer Demos/#9 Frames)

Scroll the frame 3 in the top frame and you will see the flickering.

Comment 7

[José Jeria]

Yet another url where you can scroll an iframe and see the black flickering:
http://www.htmlgoodies.com/tutors/fr4t5.html

Is this a regression?

Comment 8

[José Jeria]

Ok, last url..
http://bugzilla.mozilla.org/enter_bug.cgi?product=Browser&format=guided

Just click on the page so it gets focus, now click on the iframe showing the
dupes. The iframe will flicker

Comment 9

[Christopher Hoess (gone)]

*** Bug 179385 has been marked as a duplicate of this bug. ***

Comment 10

[Thamer Mahmoud]

*** Bug 169969 has been marked as a duplicate of this bug. ***

Comment 11

[Thamer Mahmoud]

*** Bug 168975 has been marked as a duplicate of this bug. ***

Comment 12

[José Jeria]

Attachment: Testcase.

Follow instructions in testcase to reproduce bug.

Comment 13

[José Jeria]

*** Bug 176144 has been marked as a duplicate of this bug. ***

Comment 14

[Thamer Mahmoud]

*** Bug 159893 has been marked as a duplicate of this bug. ***

Comment 15

[Hector Fabio Meza]

Attachment: another test case

I'm also seeing iframes flicker, however, it happens when there are form
components (specially drop-down selects) in the page. The testcase is simply
this bug's page inside an iframe. 

Just click on the drop down selects, and watch the iframe flicker. Seeing this
with build 1.3a 2002120208, on win98se, Pentium 3, 64 mb of ram

Comment 16

[José Jeria]

Latest testcase really shows how bad this bug is. Every iframe containing a
select box flickers like a christmas tree when clicked on.

Comment 17

[Laurens van den Oever]

Attachment: Grows an iframe, flicker starts when horizontal scrollbar disappears.

This testcase clearly shows the bug is related to the presence of UI
components. 

Click the body of the HTML page to start the iframe growing. At first the
iframe just flickers because it isn't redrawed fast enough. However, when it's
big enough to hide the horizontal scrollbar, a new black flicker starts.

Comment 18

[Thamer Mahmoud]

*** Bug 186629 has been marked as a duplicate of this bug. ***

Comment 19

[Marc]

This does also happen, if the iframe is overlapped by divs that get position
changed/showed/hidden using code (i.e. a dhtml menu opening over the iframe or
dhtml window)

Comment 20

[Marc]

sorry...the flickering when overlapped by divs is gone with 2002121215 (1.3a) on
W2K. Still had a 1.21 when testing before (I know, I know...sorry). :-)

Anyways, I noticed, that when being inside the page the div problem is gone
away, but upon focusing the address text field, the iframe flickers again (the
ususal black redraw flash).

Comment 21

[Thamer Mahmoud]

*** Bug 188568 has been marked as a duplicate of this bug. ***

Comment 22

[Charles Capps]

The recursive sample in bug 193334 is a very good demonstration of this
particular bug... let it load recursively a few dozen times, then click on the
innermost iframe.  There's no way to miss that, even on very fast machines.  

Comment 23

[Joseph Wilhelm]

*** Bug 195097 has been marked as a duplicate of this bug. ***

Comment 24

[arman]

Is there any chance that this problem is going to fixed soon?  Given the number
of duplicates, I'm guessing that a lot of people are running into it.

Comment 25

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

I can't reproduce this bug with 2003031204-trunk/WinXP.

Comment 26

[Jason A.]

Confirming this bug cannot be reproduced with Mozilla/5.0 (Windows; U; Windows
NT 5.0; en-US; rv:1.4a) Gecko/20030312.

Comment 27

[Thamer Mahmoud]

--> Fixed through bug 196308

Comment 28

[:deanis74]

actually a dupe, but whatever.  verifying

Comment 29

[:deanis74]

Forget that last comment, I didn't realize how old this bug is.  But yes, this
bug is fixed.

Comment 30

[José Jeria]

*** Bug 198434 has been marked as a duplicate of this bug. ***

Comment 31

[José Jeria]

*** Bug 197017 has been marked as a duplicate of this bug. ***