Mouse wheel event's angleDelta().y() always 0 with Alt key modifier

[Florian Bruhin]

On Fri, Nov 25, 2022 at 10:01:39AM +0100, Tobias Megies wrote:
> When Alt key is held down, mouse wheel events always report 0 for
> "angleDelta().y()", i.e. it is impossible to tell in which direction the
> mouse wheel was scrolled. Not sure if Alt is the only affected modifier, in
> any case some other common keys like shift or control are not affected.

It's a Qt problem, or rather probably intended Qt feature.
Pressing Alt and scrolling leads to a horizontal scroll:

https://bugreports.qt.io/browse/QTBUG-91556
https://bugreports.qt.io/browse/QTBUG-78550

Florian

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