Configs. Touchpad-like scroll with mouse

Hi!

Tired of fixing / blowing / replacing mouse wheel every now and then? Lovin' middle-button scroll in your favourite firefox fork and wanna use it everywhere?

Let's make a touchpad-two-fingers-like-scrolling with a mouse!

(It works like this: you hold some button and drag the mouse up / down / left / right to scroll, the cursor remains in the same place.)

General GNU/Linux

Open / create /etc/X11/xorg.conf.d/99-mouse.conf and add those lines to it (this should work, but untested as I use NixOS):

Section "InputClass"
    Identifier "Mouse Defaults"
    MatchIsPointer "on"
    MatchDevicePath "/dev/input/event*"
    Driver "libinput"
    Option "ScrollMethod" "button"
    Option "ScrollButton" "button3"
EndSection

You can replace button3 (right button here) with the desired button to activate dragging scroll.
To find out the exact button I use xev util.

NixOS

These are the lines to add to your NixOS config:

services.libinput.mouse = {
  scrollMethod = "button";
  scrollButton = 3;
};

Bye!