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

[bugzilla-daemon at freedesktop.org]

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

            Bug ID: 99415
           Summary: Need way to report start of finger scroll
           Product: Wayland
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: adam at spicenitz.org

It would be good to be able to have kinetic scrolling stop if fingers go back
down on a touchpad in a scrolling gesture (two fingers, edge, etc). This lets
you fling with two fingers, then stop the scrolling by putting fingers back
down.

To do this, we need to get some event that represents scroll-finger down, but
not yet moved.

I think emitting a zero event would work for this, the same as finger up and
button down.

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