406020 - Linux/Gnome: Pointing at a drop-down list box and scrolling the scroll-wheel doesn't change the selected option

Status: NEW

(Core :: Layout: Form Controls, defect)

Description

[Grey Nicholson (they/them)]

In native Gnome applications, pointing at a drop-down list box and scrolling the scroll-wheel changes the selected option: scrolling up selects the previous option and scrolling down selects the next option; without the list box dropping down.

In Firefox, pointing at a drop-down list box in content and scrolling the wheel causes the page to scroll. Pointing at a drop-down list-box in chrome (for example in the Preferences dialogue) does nothing.

This is more confusing now that Firefox's list boxes *look* like real Gnome list boxes (but don't *act* like them).

Expected behaviour:
Pointing at a drop-down list box and scrolling the scroll-wheel should change the selected option, without the list box dropping down.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Pretty sure that this setup wouldn't be web-compatible (unless onchange events were somehow deferred until the user is "done scrolling", whatever that means).

Comment 2

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

I'm not sure if this is performed as default action of mouse wheel scrolling on Linux. I think that if we add a new value to LookAndFeel, we can perform this only on Linux, though.

Per comment 1 and comparing with the behavior of Gecko on other platforms, it may be risky. But I don't know the behavior on other browses on Linux.