Sets up 2d scroll for trackball

trackball.sh

#!/bin/bash

# use xinput to get hardware id, xinput --list-props id to get order of
# hardware buttons for your mouse
#		hardware						software
# 1 	large one left					left click
# 2 	both large ones					middle click
# 3 	large one right					right click
# 4 	trackball down					scroll up
# 5 	trackball up					scroll down
# 6 	trackball left					scroll left
# 7 	trackball right					scroll right
# 8 	small one left					thumb 1
# 9 	small one right					thumb 2
# 10									ExtBt7
# 11									ExtBt8

if [[ $(xinput list) =~ 'Trackball' ]]; then
	echo "Setting up Logitech trackball"
	# this line doesn't seem to work. It does have an effect, though.
	xinput set-button-map 'Logitech USB Trackball' '1 2 3 4 5 6 7 2 2'
	# enable wheel emulation
	xinput --set-prop --type='int' --format='8'		'Logitech USB Trackball' 'Evdev Wheel Emulation'			'1'
	# which buttons to use for scrolling
	xinput --set-prop --type='int' --format='8'		'Logitech USB Trackball' 'Evdev Wheel Emulation Button'		'8' 
	# pixels before scrolling reacts
	xinput --set-prop --type='int' --format='16'	'Logitech USB Trackball' 'Evdev Wheel Emulation Inertia'	'1' 
	# milliseconds before scrolling reacts, less is more comfortable for scrolling, but middle mouse click is only registered if it's faster than this.
	xinput --set-prop --type='int' --format='16'	'Logitech USB Trackball' 'Evdev Wheel Emulation Timeout'	'120' 
	# disable middle button emulation
	xinput --set-prop --type='int' --format='8'		'Logitech USB Trackball' 'Evdev Middle Button Emulation'	'0'
fi