[Wayland-bugs] [Bug 99415] RFE: Need way to report start of finger scroll

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99415

Peter Hutterer <peter.hutterer at who-t.net> changed:

           What    |Removed                     |Added
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             Status|NEEDINFO                    |ASSIGNED

--- Comment #6 from Peter Hutterer <peter.hutterer at who-t.net> ---
I guess the main issue I have with this is that we can't drop the "scroll is 0
on stop" without breaking backwards compatibility, so if we send a scroll stop
event, we'd be sending the same information twice and guarantee that it always
gets ignored. Leaving it out would result in perceived asymmetrical event
stream. That's a bit unfortunate.

But otherwise, it'd be a LIBINPUT_EVENT_POINTER_AXIS_START and
LIBINPUT_EVENT_POINTER_AXIS_CANCEL, sent only for some pointer sources. The
former is relatively trivial, the latter is the one that needs the detailed
work to avoid breaking backwards compatibility.

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