Flash problem on change tab into TabSheet component

[Thomas]

Flash appears when user has changed scroll position on table and when he decide to change Tab selection.
Problem seems to be similar than this ticket.

I used itmill-toolkit-5.3.0_trunk_20080901.jar. See Project in attachment to reproduce it.

[Thomas]

I proceed to a new project test with complex component into TabSheet?, I think the problem is more visible (cf Attachment).

[Jouni Koivuviita]

Using the application provided in the zip

[Jouni Koivuviita]

Hi Thomas,

Added a video clip of the application in operation using latest trunk from today and a pretty new WebKit? build. I also tested this with Firefox 3, and the only difference is in performance (quite a heavy table there :))

I see nothing erraneous in the behaviour, no flashing of any kind. The only problem I am able to see, is the blank table after I switch back to "Test" tab. But that is another bug and another ticket. If that is the bug you're trying to explain here (blank table after switching between tabs), then I will close this ticket as invalid and create a new ticket for that (if not already found within Trac).

Please review the video, and tell us if you have experience something other in your environment. But be sure to test it with the latest nightly build, to see if the problem is already resolved. Thanks!

[Jouni Koivuviita]

Added a test case in [5399].

[Thomas]

Hi Jouni,

Thanks for your video, and as you say I can't see my flash problem into ! But after some new tests I probably know why. To make the following tests I use project in attachment and look if I use your last build build 01/09/2008.
I'm under Linux (Ubuntu Hardy), I use FireFox v3.0 and I think it's the cause of my problem. So, to prove it I have just done some new tests with different web browser to reproduce it.

• IE v6.0 (under Wine) -> ok
• Safari v3.1.2 (under Wine) -> ok
• Opera v9.5.2 -> ok
• FireFox v3.0.1 -> flash problem
• Epiphany v2.22.2 -> flash problem

I think that is the version of Gecko engine with FireFox under Linux who is the problem. (Mozilla/5.0 (X11; U; Linux i686; fr; rv:1.9.0.1) Gecko/2008072820 Firefox/3.0.1)
To be sure that's not a plugin with my !firefox I made my tests and video capture with Epiphany. But note that the problem is exactly the same under FireFox, Iceweasel, Epiphany who use Gecko engine.

I will upload the video to show flash problem between tab into Accordion and TabSheet Component.
About the blank table I've got the same problem too, if this problem is not referenced into your track I will open a new Ticket about that.

Thanks !!

[Thomas]

Flash problem under Epiphany

[Joonas Lehtinen]

If we can repeat the problem under more common circumstances, priority will be raised. For now, this will be dropped from the 5.3.0 milestone.

[Thomas]

Reproduce some Tests under FireFox v3.0.3 ( details : Mozilla/5.0 (X11; U; Linux i686; fr; rv:1.9.0.3) Gecko/2008092510 Ubuntu/8.04 (hardy)) and Opera.
Using ItMill 5.2.10 and reduce Test Case (see class in attachment).
Currently the flash problem when user scroll down into table and switch tabs stills present under FF and doesn't appear under Opera.

[Joonas Lehtinen]

Thanks for the test-case. It looks simple enough to me. Moving the ticket back to 5.3.0RC.

[Thomas]

Just to add some more details about this ticket.
Today I have done some new tests under different web browser and I can confirm that the problem come from Gecko v1.9 and probably under version. The problem is not present when web browser uses Webkit like Safari, Google Chrome. It's ok under Opera.

[Artur Signell]

The problem is clearly a Firefox bug present in both FF2 and FF3.

The way tabs are changed in a tabsheet is changed in [5801] and this should work around the flickering problems.

The same flicker problem is however still present in Accordion.

[Artur Signell]

Accordion problems worked around in [5886].

Just as a note it will not be possible to back port these changes to 5.2.x. as they heavily depend on 5.3.x architectural changes.