[Wayland-bugs] [Bug 93803] Tap-and-drag is actively problematic when using things like gmail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93803

            Bug ID: 93803
           Summary: Tap-and-drag is actively problematic when using things
                    like gmail
           Product: Wayland
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: luto at mit.edu

I enabled tapping on my touchpad in the GNOME control panel on Fedora 23.  The
tapping feature itself works nicely.  The tap and drag is a showstopper.

In particular, it makes using gmail nearly impossible.  Gmail presents a list
of messages, each of which has a checkbox next to it.  Sometimes I want to
check several of the checkboxes.  With a real mouse, I would point to one,
click (and release), point to the next one, click, etc.  With tapping off, I
point to one, press and release the button, point to the next one, press and
release the button, etc.

If I use the tap gesture, the obvious (and only AFAICT) way to do this is to
point, tap and release, point, tap and release, etc.  But libinput's tap and
drag is far to clever for this usecase: the sequence (tap, release, move
cursor) is exactly the gesture to initiate a tap-and-drag.  The result is that
I start dragging gmail messages around instead of selecting them.

I can work around it by pointing tapping and releasing, waiting, pointing,
etc., but then I'm just playing a game of chicken against libinput's
tap-and-drag timeout.

Please consider either making tap-and-drag configurable or fine-tuning it so
that tap-and-drag is clearly distinguished from click-and-point-elsewhere.


This is stock Fedora 23.  I have:

libinput-1.1.4-2.fc23.x86_64
libinput-devel-1.1.4-2.fc23.x86_64
xorg-x11-drv-libinput-0.16.0-1.fc23.x86_64

If this bug is against the wrong component, please let me know.

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