[PATCH libinput 3/6] touchpad: make gestures optional

Bill Spitzak spitzak at gmail.com
Fri Jul 31 14:25:35 PDT 2015

On Fri, Jul 31, 2015 at 1:43 AM, Hans de Goede <hdegoede at redhat.com> wrote:

> I thought about that when doing the patch but decided for this approach on
>> purpose.  currently, a mis-detection of a pinch gesture with gestures
>> enabled means the gesture remains until the fingers are lifted. with this
>> patch otoh it just doesn't do anything until we detect a scroll gesture,
>> at
>> which point we switch to scrolling.
> I see that is a valid point.
>> the point here is that the scroll detection code is still at work, so
>> hopefully that "trains" users to perform the right scroll action. we get
>> consistent behaviour across touchpads too this way, and we avoid the
>> situations down the track of "it used to scroll this way but now it
>> doesn't
>> anymore" when we add other features, or when we manage do to gestures
>> reliably on those touchpads after all.
>> I might be overthinking this though :)
> You are :)
> But I can see the logic in not training users to use the "wrong" kind of
> 2fg
> gestures for scrolling, so lets go with your approach:

Could the scroll gesture "cancel" the pinch gesture when it is detected? Or
is cancelling only done by the compositor and not by libinput.
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