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--- doc:appunti:linux:sa:touchpad_disable [2021/05/12 10:33] – [Using Fn+ESC on the Teclast F6] niccolo
+++ doc:appunti:linux:sa:touchpad_disable [2021/05/12 19:08] – [Mapping Fn+ESC on the Teclast F6] niccolo
@@ Line 42: / Line 42: @@
 Replace the **zero** with **1** to re-enable it.
-===== Using Fn+ESC on the Teclast F6 =====
+===== Mapping Fn+ESC on the Teclast F6 =====
+The ESC key on the **Teclast F6 notebook** has the blue label indicating that the shortcut **Fn+ESC** should trigger the **touchpad toggle** function, but it does not work in GNU/Linux.
+Using the **evtest** tool we can see that the Fn+ESC keys produces three events, i.e. it is the same as pressing three keys together:
 <code>
@@ Line 54: / Line 58: @@
 Event: time 1620808298.473572, type 4 (EV_MSC), code 4 (MSC_SCAN), value 76
 Event: time 1620808298.473572, type 1 (EV_KEY), code 85 (KEY_ZENKAKUHANKAKU), value 1
+</code>
+The keys are **Left Control**, **Left Meta** (also known as //Left Logo// or //Lef Windows// key) and the key used to toggle from Zenkaku (full-width) to Hankaku (half-width) Japanese character spacing :-O
+Using **udev** I remapped the ''ZENKAKUHANKAKU'' key to the more useable **ESC** (see this page about **[[remap_keyboard_keys#customize_events_using_udev|customize udev events]]**):
+<file>
+evdev:atkbd:dmi:*
+ KEYBOARD_KEY_76=esc
+</file>
+Finally, using the XFCE **Settings** => **Keyboard**, I associated the **Ctrl+Super+Escape** keyboard shortcut (where //Super// means //Left Win//) to the following shell script **/usr/local/bin/touchpad-toggle**:
+<code bash>
+#!/bin/sh
+STATE="$(xinput --list-props 11 | egrep '^\s+Device Enabled' | rev | awk '{print $1}')"
+set_on() {
+    xinput set-prop 11 154 1
+    echo "Touchpad enabled"
+}
+set_off() {
+    xinput set-prop 11 154 0
+    echo "Touchpad disabled (pass \"1\" as first option to re-enable it)"
+}
+case "$1" in
+    on|yes|1)
+        set_on
+        ;;
+    off|no|0)
+        set_off
+        ;;
+    *)
+        if [ "$STATE" -eq "1" ]; then
+            set_off
+        else
+            set_on
+        fi
+        ;;
+esac
 </code>