https://bugs.kde.org/show_bug.cgi?id=431200

            Bug ID: 431200
           Summary: Unable to set double click for right click in touchpad
                    settings
           Product: systemsettings
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: kcm_touchpad
          Assignee: plasma-b...@kde.org
          Reporter: a....@moronet.pl
  Target Milestone: ---

Created attachment 134597
  --> https://bugs.kde.org/attachment.cgi?id=134597&action=edit
kcm_touchpad X11

KCM Touchpad settings don't allow setting up "clickfinger" Click method also
known as "Press anywhere with two fingers" option for right click.

Tested this on 2 Thinkpads: T450s and ThinkPad X1 Carbon Gen 8

Under X the option is displayed but is disabled and cannot be enabled. Under
wayland this option is completely missing.

Under wayland libinput list-devices properly shows the properties are
available:

Device:           Synaptics TM3053-004
Kernel:           /dev/input/event17
Group:            8
Seat:             seat0, default
Size:             97x53mm
Capabilities:     pointer gesture
Tap-to-click:     disabled
Tap-and-drag:     enabled
Tap drag lock:    disabled
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: disabled
Calibration:      n/a
Scroll methods:   *two-finger edge 
Click methods:    *button-areas clickfinger 
Disable-w-typing: enabled
Accel profiles:   flat *adaptive
Rotation:         n/a

It's possible to manually enable the method via dbus:
qdbus org.kde.KWin /org/kde/KWin/InputDevice/event17
org.kde.KWin.InputDevice.clickMethodClickfinger true


STEPS TO REPRODUCE
1. Open System settings
2. Click on Input Devices category
3. Click on Touchpad Input Devices



OBSERVED RESULT

Depending if under X11 or wayland the option is disabled or completely missing

EXPECTED RESULT
Option "Right click" is available and possible to choose via a radio option
type with the following choices available:
- Press bottom-right corner
- Press anywhere with two fingers

SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Fedora 33 
(available in About System)
KDE Plasma Version: 5.20.4
KDE Frameworks Version: 5.77.0
Qt Version: 5.15.2

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