#+title: Trackball
#+setupfile: ../../headers

* Trackball
I use a trackball on some of my machines, and I middle-click by
pressing the left and right buttons together rather than through a
dedicated button. That’s the only downside of the two trackballs I
own; otherwise, I can’t recommend one enough. Here’s the
=nixos.trackball= module enabling this behaviour.
#+begin_src nix :tangle yes
{
  flake.modules.nixos.trackball = {
    <<middle-emulation>>
  };
}
#+end_src

Enabling middle-click emulation is simple:
#+name: middle-emulation
#+begin_src nix
services.libinput.mouse.middleEmulation = true;
#+end_src