A script to auto-disable a trackpad N seconds after last press.

disable-trackpad-timeout.py

#!/bin/python

import time
import subprocess
import threading


def get_device_node(name, strip_path=False):
    # output = subprocess.check_output(["xinput", "list-props", name]).decode('utf-8')
    # for line in output.splitlines():
    #     if line.strip().startswith('Device Node'):
    #         device_node = line.strip().split()[-1].strip('"')
    #         if strip_path:
    #             device_node = device_node.split('/')[-1]
    #         return device_node
    output = subprocess.check_output(["toggle_touchpad.sh", "1"]).decode('utf-8')
    if '/' in output:
        node = output.split('/')[-1]
        if node.startswith('event'):
            return node.strip()
    raise ValueError(f"device node not found")


def disable_after_t(device_name, t_thresh=5.0):
    event_n = get_device_node(device_name, strip_path=True)
    process = subprocess.Popen(['libinput', 'debug-events'], stdout=subprocess.PIPE, universal_newlines=True)
    t_last = time.time()
    for line in process.stdout:
        if line.strip().startswith(event_n):
            t_last = time.time()
        if time.time() - t_last > t_thresh:
            break
    #subprocess.run(["xinput", "disable", device_name])
    subprocess.run(["toggle_touchpad.sh", "0"])
    process.kill()


#name = "Apple Inc. Magic Trackpad 2"
#subprocess.run(["xinput", "enable", name])
subprocess.run(["toggle_touchpad.sh", "1"])
disable_after_t(name, t_thresh=5.0)

toggle_touchpad.sh

#!/bin/bash

# original from https://gist.github.com/jpsutton/ba3b40ae5d2e44b88bd6ce9a0f9971d6
# added argument to enable/disable, added print event node

SERVICE="org.kde.KWin"
DBUS_PATH="/org/kde/KWin/InputDevice"
INTERFACE="org.kde.KWin.InputDevice"
METHOD_GET="org.freedesktop.DBus.Properties.Get"
METHOD_SET="org.freedesktop.DBus.Properties.Set"

function find_touchpad {
    DM_INTERFACE="org.kde.KWin.InputDeviceManager"
    DM_PROPERTY="devicesSysNames"


    for sysname in $(qdbus "$SERVICE" "$DBUS_PATH" "$METHOD_GET" "$DM_INTERFACE" "$DM_PROPERTY"); do
        is_touchpad=$(qdbus "$SERVICE" "${DBUS_PATH}/${sysname}" "$METHOD_GET" "$INTERFACE" touchpad)

        if [ "$is_touchpad" == "true" ]; then
            echo "$sysname"
            break
        fi
    done
}

function toggle_touchpad {
    DBUS_PATH="${DBUS_PATH}/$(find_touchpad)"
    PROPERTY="enabled"

    echo $DBUS_PATH

    if [ "$1" == "1" ]; then
        status="true"
    elif [ "$1" == "0" ]; then
        status="false"
    else
        # Get the current status of the touchpad
        status=$(qdbus "$SERVICE" "$DBUS_PATH" "$METHOD_GET" "$INTERFACE" "$PROPERTY")

        # Flip the status
        status=$([[ "$status" == "false" ]] && echo true || echo false)
    fi
    # Set the new status
    qdbus "$SERVICE" "$DBUS_PATH" "$METHOD_SET" "$INTERFACE" "$PROPERTY" "$status"
}

toggle_touchpad "$1"

updated for wayland based on https://gist.github.com/jpsutton/ba3b40ae5d2e44b88bd6ce9a0f9971d6

fusuma config is now this

swipe:
  3:
    up:
      command: "killall disable-trackpad-timeout.py ; /path/to/disable-trackpad-timeout.py"
    down:
      command: "killall disable-trackpad-timeout.py ; /path/to/toggle_touchpad.sh 0"
      # command: "killall disable-trackpad-timeout.py ; xinput disable \"Apple Inc. Magic Trackpad 2\""