[enhancement] Support two-finger right click on clickpads

[Lukáš Tinkl]

Actual:
Right clicking on a touchpad device produces a regular (left) click

Expected:
The right click should behave the same as on X11, doing the same as a RMB click.

[Daniel van Vugt (vanvugt)]

In general Mir's touchpad support is incidental and not really done yet. I think it's coming soon with libinput.

BTW, by "right click" are you using a separate button or two fingers on a clickpad?

[Lukáš Tinkl (lukas-kde)]

2-finger click on a clickpad

[Daniel van Vugt (vanvugt)]

Cool, thanks. Technically a two-finger click counts as gesture recognition. So that's probably a separate task for each shell right now.

[Daniel van Vugt (vanvugt)]

Although we may put common gesture recognition into Mir for all to use. Maybe with libinput. Maybe further after that.

[Lukáš Tinkl (lukas-kde)]

BTW, here's my X config file:

# This option enables the bottom right corner to be a right button on clickpads
# and the right and middle top areas to be right / middle buttons on clickpads
# with a top button area.
# This option is only interpreted by clickpads.
Section "InputClass"
        Identifier "Default clickpad buttons"
        MatchDriver "synaptics"
        Option "Clickpad" "true"
        Option "ClickFinger2" "0" # no action when clicking with 2 fingers
        Option "ClickFinger3" "2" # middle click on 3-finger click
        Option "PalmDetect" "1"
        Option "TapButton2" "0" # no action when tapping with 2 fingers
        Option "TapAndDragGesture" "0" # no tap and drag
        Option "SoftButtonAreas" "50% 0 82% 0 0 0 0 0"
        #Option "SecondarySoftButtonAreas" "58% 0 0 15% 42% 58% 0 15%" # those are on top of the touchpad
EndSection

[Daniel van Vugt (vanvugt)]

That's a little spanner in the works. I was thinking you wanted the more common setting like:
   synclient ClickFinger2=3
which makes two finger clicking the same as Mac, ChromeOS and many Windows machines. I think it's a sane default, although comment #5 suggests you're asking for something totally configurable like the X synaptics driver. That's also reasonable but I would hope in the new world of Mir and Unity8 that we start with providing people a GUI for configuring it all :)

[Gerry Boland (gerboland)]

Is Mir's job to interpret such gestures, QtMir just passes the interpreted events to the shell.

[Daniel van Vugt (vanvugt)]

That's an interesting assertion. I'm not saying it's wrong, but it is a major statement of a feature Mir does not have yet and we have not discussed yet.

The road between raw touch events and high-level gestures is well travelled, but I'm not yet sure how far along we want Mir to provide such features. As demonstrated with synclient, it's something people like to configure for themselves too.

If Mir provided the gesture conversion of a two finger click into a right click then at some stage someone would probably ask for a way to disable that feature and get the raw touch data instead.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.