LibreScroll

Smooth inertial scrolling on Windows with any regular mouse.

https://github.com/EsportToys/LibreScroll/assets/98432183/c7fc05a5-6b10-4b91-9984-0d809a52b025

Instructions

Run LibreScroll
Hold Mouse 3 and move your mouse, the cursor will stay in-place, mouse motion is instead converted to scroll momentum.
Release middle-mouse-button to halt scroll momentum and release the cursor.

To compile from source, run

zig build-exe main.zig main.rc main.manifest --subsystem windows

The rate at which momentum decays.

(Units: deceleration per velocity, in s⁻¹)

The horizontal/vertical multiplier at which mouse movement is converted to scroll momentum.

Set a negative sensitivity to use reversed-direction scrolling, or zero to disable that axis entirely.

(Units: scroll-velocity per mouse-displacement, in s⁻¹)

The granularity at which to send scrolling inputs.

This is a workaround for some legacy apps that do not handle smooth scrolling increments correctly.

A "standard" coarse scrollwheel step is 120, and the smallest step is 1.

When enabled, releasing middle-mouse-button will not stop the scrolling momentum.

Press any button again (or move the actual wheel) to stop the momentum.

When enabled, scrolling snaps to either horizontal or vertical, never both at the same time.

This emulates how scrolling works on ThinkPad TrackPoints.

Temporarily disable the utility if you need to use the unmodified behavior in another app.

This kills the worker thread, which can be restarted by clicking Unpause or Apply.

After modifying the preference, click this to apply the configuration as displayed.

This kills and restarts the worker thread with the new configuration.

With your TrackPoint's middle button set to "middle click mode", the following configurations are recommended to emulate TPmiddle's direct scrolling:

Friction: 30
Y-Sensitivity: 90
X-Sensitivity: 90
Minimum X-Step: 10
Minimum Y-Step: 10
Flick Mode: No
ThinkPad Mode: Yes