669738 - swipe gesture in <select> is flaky

Status: NEW

(Core :: Widget: Cocoa, defect)

Description

[Justin Dolske [:Dolske]]

Scrolling a long <select> is flaky when using two-finger swipe gesture on my MBP. The list starts to scroll, and then suddenly disappears.

STR:

1) Find a long <select> list (like, say, the Component dropdown in bugzilla)
2) Click it to bring up the dropdown list (should have a scroll bar)
3) Place mouse cursor over list, an item will hilight
4) 2-finger swipe up or down.

Expected:

5) pointer stays still, list scrolls up and down, stopping and ends.

Actual:

5) pointer stays still, list starts to scroll up or down, then suddenly disappears. No item was selected from list.

It's definitely flakey, I just did it a bunch of times with Bugzilla, but now it's working ok. I switched to another page and reproduced it again, but then it started working again!

It's possible this is something flaky in the menupopup related code, probably need to do some event debugging to see who's doing what.

I first noticed this on http://myrental-living.com/select-community.aspx

Comment 1

[Justin Dolske [:Dolske]]

Oh, forgot to add: the swipe was working fine for me when I swiped fairly slowly. It was only with a more rapid swipe that it did this. So the OS momentum scrolling seemed like the most-likely culprit.