227015 - Link clicks "fall through" CSS popup menus.

Status: RESOLVED DUPLICATE of bug 102578

(Core :: CSS Parsing and Computation, defect)

Description

[Fredrik Tolf]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6a) Gecko/20031122
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6a) Gecko/20031122

On mezzoblue.com, the bottomright part of the top banner has two popup menus
that are made through CSS. If you hover the mouse over either "about" or
"weblog", a menu div pops up with some links. These divs are rendered above some
links to some other of the author's projects. If I click on one of the links in
the menu div, however, the click "falls through" to the underlying links. For
example, if I open the weblog menu and try to click "current", the click fall
through to the link to the "blue spark" project that the menu renders above.

The same thing sometimes happen on the CSS Zen Garden with the "This is Cereal"
design:
http://www.csszengarden.com/?cssfile=/057/057.css&page=0
On mezzoblue.com, however, the bug is always reproducible, while on the CSS Zen
Garden, it is only reproducible when a part of the popup menu that does not
contain a link is clicked (for example, if you open the Designs menu and click
on the "view css file" link that is rendered below the menu).


Reproducible: Always

Steps to Reproduce:
Open the menu.
Click a link in it.
Actual Results:  
Mozilla activates the link below the popup div.

Expected Results:  
It should have activated the link in the menu.

Comment 1

[Anne (:annevk)]

WFM: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6b) Gecko/20031119

Comment 2

[Fredrik Tolf]

I forgot to say before, the same thing happens in my stable build of Mozilla
1.4, only it works even worse in it - It's very hard even to make the links on
the CSS Zen Garden page to work.

Comment 3

[Hermann Schwab]

wfm Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.6b) Gecko/20031126
I´m on 800x600 screen resolution, and I opened the 'about' menu, and clicked the
'about mezzoblue' link, which is overlaying the 'Zen Garden' link, in my screen
resolution. Of course screen resolution shouldn´t play a role, but this is a bug
here, maybe it´s dependent on the resolution.

But imho there is a design flaw on the site:
When hovering over 'Zen Garden' 'Blue Spark' 'Modernalus' so that the forefinger
of the mousepointer (hand) just touches the letters, the menus are highlited,
when the pointer still is out of the highlited area.
Reason: the mouse sensitive areas are rectangular, the visual vertical borders
of the menus are tilted, so when the forefinger is going from 'd' to 'e' of 'Zen
Garden', the pointer is on 'zen garden', but 'blue spark' is highlighted and, on
click, loaded.

Comment 4

[Fredrik Tolf]

I just tried the latest MozillaFirebird builds on both Windows and Linux, and it
seems that while it works perfectly on the Windows build, on Linux it behaves
just like Mozilla, so I'm beginning to think that this is an X-specific fault.

I used the GTK2 Firebird build on Linux, while Mozilla uses GTK1, so it seems
that it is toolkit-independent. Therefore I'm guessing that it has something
with some X-specific component to do.

Linux version: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5) Gecko/20031007
Firebird/0.7
The laptop that was running Windows just ran out of battery power, so I can't
check the Firebird version on it right now, but it is the same build as the
Linux one.

I'm using XFree86 4.3.0, if that makes any difference.

Comment 5

[Boris Zbarsky [:bzbarsky]]

What windowmanager are you using?  Could you test a current nightly build?  Some
windowmanagers deliver bogus mouseout events that builds until very recently did
not handle at all well.

Comment 6

[Fredrik Tolf]

It worked perfectly in the latest nightly build. Does that mean that it's fixed,
or might it just be coincidence?

Comment 7

[Boris Zbarsky [:bzbarsky]]

That means you were seeing the problem I thought you were seeing.  ;)  It's fixed.

*** This bug has been marked as a duplicate of 102578 ***