[PATCH weston 4/8] shell: Update bindings to conform to pointer axis protocol

[Pekka Paalanen]

On Fri, 28 Sep 2012 13:46:05 +0200
Jonas Ådahl <jadahl at gmail.com> wrote:

> Regarding regular mouse wheels, reading the documentation[0] I'm not
> sure about the expected behavior and cannot test it my self yet due to
> lack of hardware. Considering that REL_WHEEL/REL_HWEEL events are
> grouped together with other REL_* events one can think that they
> should have the same measurement, or if not it should be documented
> what they do. This might not be the case though. If the wheel events
> behave as the wayland axis ones does it should work out of the box and
> would have been broken before, otherwise they need to be addressed as
> well. I'll get myself a mouse and test it sooner or later to see
> what's actually going on.
> 
> There are also different kinds of scroll wheels out there, both the
> discrete stepped one, and the "smooth" ones. Would be interesting to
> see how these behave differently from an evdev point of view.

I have an old discrete-stepped mouse wheel, it reports:

Event: time 1348834027.330811, type 2 (EV_REL), code 8 (REL_WHEEL), value 1
Event: time 1348834027.330812, -------------- SYN_REPORT ------------

and the other direction:

Event: time 1348834027.906825, type 2 (EV_REL), code 8 (REL_WHEEL), value -1
Event: time 1348834027.906827, -------------- SYN_REPORT ------------

So it reports literally the number of "steps" it rotates. In urxvt on X,
each step seems to scroll 5 lines.

I don't have a smooth one to test.


Thanks,
pq