fht-compositor

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Input device configuration ​

You can configure various input device functionality under fht-compositor thanks to libinput.

Keyboard configuration ​

NOTE

As of writing this, keyboard configuration is only global, IE. you can't set it per-device. This is a limitation of the wl-seat protocol, allowing for only one configuration at a time.

rules, model, layout, variant, options ​

These are all XKB settings.

  • You can find out available keyboard rules, variants and options from the /usr/share/X11/xkb/rules/base.lst file, or using localectl (see man 5 localectl)
  • You can find the correct keyboard layout for yourself on this page

By default, all these are empty strings (using system defaults), and layout is us

repeat-rate, repeat-delay ​

These two options control key repeating. repeat-delay is the delay in milliseconds that you should hown a key for key repeating to start. repeat-rate is the frequency at which the key is repeated.

Default settings are repeat-rate=25, repeat-delay=250

Mouse settings ​

Mouse settings. The compositor (libinput) will figure out automatically which setting should be applied or not, and whether the connected mouse type supports a given feature.

Depending on your mouse type, you can use:

  • mouse: For generic mice
  • touchpad: For laptop touchpads
  • trackpoint: For trackpoint (usually found on Thinkpads)

Default mouse settings

If an option does not have a default specified, it is up to the device driver (IE. libinput) to choose one.

acceleration-profile ​

How should the pointer cursor accelerate with mouse movement. Available values are:

  • adaptive: Takes the current speed of the device into account when deciding on acceleration.
  • linear: Constant factor acceleration-speed applied to all deltas, regardless of the speed of motion.

acceleration-speed ​

A factor to multiply mouse movement delta with. Must be in the range [-1.0, 1.0]

Default is 1.0

left-handed ​

Whether to enable left handed mode for the device. This will swap the left and right clicks.

scroll-method ​

For touchpads, determines how to emulate a scroll wheel using only your fingers (and no dedicated button). Available values are:

  • no-scroll: Disable scrolling emulation.
  • two-finger: Scrolling is triggered by two fingers being placed on the surface of the touchpad.
  • edge: Scrolling is triggered by moving a single finger along the right edge (vertical scroll) or bottom edge (horizontal scroll).
  • on-button-down: Converts the motion of a device into scroll events while a designated button is held down. This is common in ThinkPad trackpoints

scroll-button, scroll-button-lock ​

The button used to enable on-button-down scroll method. When scroll-button-lock is enabled, the button does not need to be held down, and insteads turns the button into a toggle switch.

click-method ​

Determines how button events are triggered on a touchpad/clickpads. Available values are:

  • button-areas: The bottom area is divided into three thirds, like the following:

  • click-finger: Emulate clicks based on the number of fingers used, 1 is left, 2 is right, 3 is middle.

natural-scrolling ​

Whether to enable natural scrolling.

Natural scrolling matches the motion of the scroll device with the motion of the content

middle-button-emulation ​

Whether to emulate a left+right click at the same time as a middle click. The middle click is the one you have when you click on your mouse's scroll wheel.

disable-while-typing ​

The name is clear enough.

tap-to-click, tap-button-map ​

Whether to emulate clicking on touchpads/clickpads by tapping the surface.

tap-button-map changes how tap-to-click behaves. Available maps/modes are: left-right-middle, left-middle-right (for 1 finger, 2 finger and 3 finger taps respectively)

tap-and-drag, drag-lock ​

Whether to enable Tap-and-drag. If a tap is shortly followed by the finger being held down, moving the finger around will drag around the selected item from the tap.

Having drag-lock enabled will make the dragging process persist even when lifting the finger from the touchpad, and instead will require a final tap to let go of the grabbed item.

Per-device configuration ​

You can configure each registered input device individually. Per-device configuration is a table, which keys can be:

  • The device pretty name (AKA. the readable name, which you would see in a device manager)
  • A raw device path, /dev/input/eventX

To find out which devices you have connected, you can execute in a shell

sh
# You might need root privileges to run this
libinput list-devices | grep Device:
  • disable: Whether to completely disable this device.
  • mouse: Same as input.mouse/touchpad/trackpoint, but for this device only.