Remapping Kensington Expert Trackball Buttons with wayland

90-kensington-expert-trackball-remap.hwdb

# Button remap for Kensington Expert Wireless Trackball to:
#  BACK   MIDDLE
#       O
#  LEFT   RIGHT
# save this file under '/etc/udev/hwdb.d/90-kensington-expert-trackball-remap.hwdb'
# run `sudo systemd-hwdb update` and reboot
#
# source: https://askubuntu.com/questions/1145057/remapping-mouse-buttons-to-keyboard-keys
# and: https://gist.github.com/dnlvgl/d16fd822bc90dcdaaae262a76fad884e
#
# /sys/class/input/event11/device/id/bustype:0003
# /sys/class/input/event11/device/id/product:8018
# /sys/class/input/event11/device/id/vendor:047d
# /sys/class/input/event11/device/id/version:0111


evdev:input:b0003v047Dp8018e0111*
 ID_INPUT_KEY=1
 KEYBOARD_KEY_90001=272
 KEYBOARD_KEY_90002=273
 KEYBOARD_KEY_90003=275
 KEYBOARD_KEY_90004=274

README.md

You only need one:

• 90-kensington-expert-trackball-remap.hwdb is for wayland
• Kensington_Expert_Setup.sh for X11

The x11 script at least on kubunt has a weird effect - it reverts scroll direction. If I go to KDE settings and switch to invert, apply, normal, apply it returns to normal.

Kensington_Expert_Setup.sh

#!/usr/bin/env bash

# for x11
# source: https://github.com/ArtiomSu/kensington-expert-trackball-linux-config.
#
# xinput list 
# Default layout
# "Button Middle"       "Button Wheel Up"      "Button Horiz Wheel Left"    "Button Side"
#       2                   4                         6                                           8         "Button Extra"
#                                                                                              9
# "Button Left"     "Button Wheel Down"    "Button Horiz Wheel Right"   "Button Right"
#       1                                       5                         7                       3


# "Button Left" "Button Middle" "Button Right" "Button Wheel Up" "Button Wheel Down" "Button Horiz Wheel Left" "Button Horiz Wheel Right" "Button Side" "Button Extra"
#       1              2             3              4                   5                  6                               7                   8             9
#

mouse_name="Kensington Expert Wireless TB Mouse"

check=$(xinput | grep "$mouse_name")

if [[ ! -z "$check" ]]; then
        mouse_id=$(xinput | grep "$mouse_name" | sed 's/^.*id=\([0-9]*\)[ \t].*$/\1/')
        # swap right and back button then swap middle and back button
        xinput set-button-map $mouse_id 1 8 3 4 5 6 7 2 9
        # enable better scrolling 
        xinput set-prop $mouse_id "libinput Natural Scrolling Enabled" 1
        # disable acceliration for the ball
        xinput set-prop $mouse_id "libinput Accel Profile Enabled" 0, 1

        # allow scrolling by holding middle mouse button and using the ball to scroll ( really smooth and fast ). 
        xinput set-prop $mouse_id "libinput Scroll Method Enabled" 0, 0, 1
        # allow the remmaped middle mouse to be used for middle mouse scroll
        xinput set-prop $mouse_id "libinput Button Scrolling Button" 3
fi

# read more here https://askubuntu.com/questions/492744/how-do-i-automatically-remap-buttons-on-my-mouse-at-startup

# Default properties, so if you change yours around alot you can refer here for default config.
# xinput list-props
# Device 'Kensington Expert Wireless TB Mouse':
#       Device Enabled (153):   1
#       Coordinate Transformation Matrix (155): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
#       libinput Natural Scrolling Enabled (289):       0
#       libinput Natural Scrolling Enabled Default (290):       0
#       libinput Scroll Methods Available (291):        0, 0, 1
#       libinput Scroll Method Enabled (292):   0, 0, 0
#       libinput Scroll Method Enabled Default (293):   0, 0, 0
#       libinput Button Scrolling Button (294): 2
#       libinput Button Scrolling Button Default (295): 2
#       libinput Button Scrolling Button Lock Enabled (296):    0
#       libinput Button Scrolling Button Lock Enabled Default (297):    0
#       libinput Middle Emulation Enabled (298):        0
#       libinput Middle Emulation Enabled Default (299):        0
#       libinput Accel Speed (300):     0.000000
#       libinput Accel Speed Default (301):     0.000000
#       libinput Accel Profiles Available (302):        1, 1
#       libinput Accel Profile Enabled (303):   1, 0
#       libinput Accel Profile Enabled Default (304):   1, 0
#       libinput Left Handed Enabled (305):     0
#       libinput Left Handed Enabled Default (306):     0
#       libinput Send Events Modes Available (274):     1, 0
#       libinput Send Events Mode Enabled (275):        0, 0
#       libinput Send Events Mode Enabled Default (276):        0, 0
#       Device Node (277):      "/dev/input/event9"
#       Device Product ID (278):        1149, 32792
#       libinput Drag Lock Buttons (307):       <no items>
#       libinput Horizontal Scroll Enabled (308):       1

90003   90004
      O
90001   90002

BTN_LEFT - 272
BTN_RIGHT - 273

then

BTN_MIDDLE - 274
BTN_SIDE - 275 (back)

Either run sudo systemd-hwdb update and reboot (or run sudo udevadm control --reload-rules && sudo udevadm trigger).