wsg  

Re: [WSG] please help me understand how Opera (9.5) deals with em, % and pixel

Gunlaug Sørtun
Thu, 18 Sep 2008 11:13:03 -0700

tee wrote:
Hi  Georg, very nice to 'see' you :)

:-)

http://lotusseedsdesign.com/opera-test/opera-has-issue.png

I am narrowing down to the % and em that are causing many problems I have encountered. The site is in my localhost therefor I can't post it, but I will move it to a webserver maybe tomorrow or in the weekend, and email you the url (can't show the site to public) as I have stumbled 3 more issues after my post.

Some of Opera's '%' and 'em' issues are old as ****, and should have
been fixed half a decade ago.
I'll see if any of those issues are creating problems for you when I get
the page for debugging.

Problem in debugging is that I can't recreate the exact conditions of OS
and parallels you use. Should be able to improve things for the average
end-user though - to the degree Opera is willing to cooperate.

I see problems in that page, but even after side-by-side comparison
with Fx3.0.1 I can't see opacity problems. Care to explain? You can mail me off-list if it becomes long-ish.

http://marinersq.com Sorry, the opacity bug is in the homepage, the large slide show.

I looked at the correct page first time around, but couldn't decide what
intended rendering-effects should be. Looked a bit "challenged" in all
my browsers.

When the image pan out, it turns to semi-transparent and fading, but Opera shows a solid image.

Indeed. Opera starts fading too late and behaves as if it it "hangs" on
fading at cross-points.

I reported this before and talked to the author who wrote the slideshow script, he couldn't figure out even though he was very keen
 to fix it.

Something for those at Opera, me thinks. Looks like an excellent
real-world test case.

Re the unclickable and unselectable issue, here is the page. http://lotusseedsdesign.com/opera-test/opera.html

Bruno wrote he has no problem selecting the content and clicking the
 link 'go there'.

No problems with select or functions in Opera 9.20 <---> 9.60beta
versions on win2K or winXP at my end.

I trashed my Opera from both Mac and PC version (via Parallels), re-installed it but the problem doesn't go away. I am also seeing the same behavior (links not clickable) in the site I was working in my local server. I figure it must be something to do with %, pixel and em units I have for font size, margins, padding, width and line-height and Opera isn't smart enough to do the math.

Sounds like a problem in the relationship between Opera and MacOSX, and
I've quit updating/using Mac so can't test.

Though very unlikely, I have started thinking maybe the problem occurs because I have more than 1 classes declared in a div.

Never observed any "multiple classes" problems in Opera. Don't think
there are any.

Also, in the above page, do you know which checkbox/radio button is the correct rendering in Opera?

When 'Enable Styling On Forms' is checked (default) in 'opera:config',
all instances of checkbox/radio button in your page look like in your
image in Opera 9.20 <---> 9.60beta version on win2K.
In Opera on winXP the colored area of checkbox is smaller - the size of
unstyled checkbox, and therefore bordered area wider than colored area
with white space in the "gap".

How "far" you style those elements should have no effect on function.

regards
        Georg
--
http://www.gunlaug.no


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