[Wayland-bugs] [Bug 87402] Allow fake middle button on clickpads

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87402

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |benjamin.tissoires at gmail.co
                   |                            |m, bugzilla at hadess.net,
                   |                            |jadahl at gmail.com,
                   |                            |jwrdegoede at fedoraproject.or
                   |                            |g, peter.hutterer at who-t.net
             Blocks|                            |85534

--- Comment #2 from Peter Hutterer <peter.hutterer at who-t.net> ---
The main question here: we do middle button emulation on left+right click - is
this not enough and why?


one of the things we're trying to do is stick to what the HW manufacturer
intended (within reason of course). Clickpads often have the left/right buttons
marked on the touchpad but there is no marker for a middle button (except on
the T440 series, that's why we enable it there). So it's not clear where
exactly that middle button should sit on each touchpad. On an x220 for example,
the area that is not clearly marked as L/R button is too small to be a middle
button.

Lenovo for example allows a million config settings, but no middle button:
http://shop.lenovo.com/us/en/laptops/thinkpad/trackpad/?bctid=3428890606001
(Windows doesn't use the middle button as much, that may just be the
explanation)

For the patches: once a middle button was enabled, the middle button emulation
should be disabled. which brings up the question of what events to send in that
case (L+R seems fine tbh)

A configuration option for that would be necessary, but I don't think it should
be "enable middle button" but rather "has middle button emulation". this way it
can be automatically enabled on touchpads and conditionally enabled on mice
(Bug 85534)

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