236028 - [GTK2] MouseScroll event returns incorrect target

Status: RESOLVED FIXED

(Core Graveyard :: GFX: Gtk, defect)

Description

[hachiro]

User-Agent:       
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7a) Gecko/20040229

In all GTK2 widgets, MouseScroll event returns incorrect target.
Both GTK and Windows widget return correct target.

There is already a patch to fix this bug.


Reproducible: Always
Steps to Reproduce:
1. Open test_case.xul
2. Click and scroll mousewheel at the same point 

Actual Results:  
mouse-click returns correct target.
mouse-scroll returns incorrect target.


Expected Results:  
the same target should be returned.

Comment 1

[hachiro]

Attachment: test case

Comment 2

[hachiro]

Attachment: patch

Comment 3

[Glen Nakamura]

I've also had problems scrolling with the mouse wheel on Linux GTK2 builds.
The problem occurs on pages like http://slashdot.org that *sometimes* have
large ads across the top of the page.  If the ad's width is larger than the
width of the browser window and the ad covers the upper-left corner of the
viewing area, the mouse scrollwheel gets stuck and the scrollbar must be used
to move the ad off of (0,0) before the scrollwheel works again.

The problem is indeed that *all* mouse scroll events have their coordinates
set to (0,0) so when the ad covers this point, it intercepts the mouse scroll
event preventing the mouse wheel from working properly.

I can confirm that the submitted patch fixes this problem in my build.

hachiro: Did you request a review via the "Edit" action for the patch?
If not, this bug will probably continue to be ignored...

Comment 4

[hachiro]

> hachiro: Did you request a review via the "Edit" action for the patch?
> If not, this bug will probably continue to be ignored...

OK, I did it.
I have not yet understood bugzilla's system well.
Would you tell me if there's more thing to do?

thanks for your advice.

Comment 5

[Gérard Talbot]

I tried the test case.
When I click on the description node, the alert box displays "target: description".
When I roll my mousewheel on the description node, the alert box displays
"target: undefined".
Other nodes work accordingly, as expected.
Mozilla 1.8a2 build 2004060709 under XP Pro SP1a here. I can not confirm for the
Linux os.

Comment 6

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Fix checked in to trunk, 2004-06-08 12:33 -0700.

Thanks for the patch.