Key Mapper

A Linux tool to change and program the mapping of your input device buttons.

Ubuntu/Debian • Manjaro/Arch • Git

Usage

After installing, you should log out and back in for the changed user groups to take effect and for the background service to start.

To open the UI to modify the mappings, look into your applications menu and search for 'Key Mapper' in settings. You can also start it via key-mapper-gtk. It works with both Wayland and X11.

Macros

It is possible to write timed macros into the center column:

k(1).k(2) 1, 2
r(3, k(a).w(500)) a, a, a with 500ms pause
m(Control_L, k(a).k(x)) CTRL + a, CTRL + x

Documentation:

r repeats the execution of the second parameter
w waits in milliseconds
k writes a single keystroke
m holds a modifier while executing the second parameter
. executes two actions behind each other

For a list of supported keystrokes and their names, check the output of xmodmap -pke

Installation

Ubuntu/Debian

sudo dpkg -i $(wget TODO)
sudo usermod -a -G plugdev,input $USER

Manjaro/Arch

pacaur -S key-mapper-git

Git

git clone https://github.com/sezanzeb/key-mapper.git
sudo pip install key-mapper
sudo usermod -a -G plugdev,input $USER

Tests

pylint keymapper --extension-pkg-whitelist=evdev
sudo pip install . && python3 tests/test.py

Roadmap

show a dropdown to select valid devices
creating presets per device
renaming presets
show a mapping table
make that list extend itself automatically
read keycodes with evdev
inject the mapping
keep the system defaults for unmapped buttons
button to stop mapping and using system defaults
highlight changes and alert before discarding unsaved changes
automatically load presets on login for plugged in devices
make sure it works on wayland
support timed macros, maybe using some sort of syntax
add to the AUR, provide .deb file
automatically load presets when devices get plugged in after login

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