How/where to improve touchpad scrolling?

[David Hurka]

Hi everyone,

I’m successfully using KDE Neon on my Subnotebook now. I really like the 
circular scrolling feature on the touchpad. It allows to efficiently scroll 
long web pages. Does anyone else use it?

But there is a problem: When the finger gets close to the center of the 
touchpad, scrolling becomes unpredictable. Currently, a movement of a certain 
angle arround the center causes a scroll step, so near the center scrolling 
either does not work or instantly moves to the top/bottom of even long web 
pages. Then, the human’s focus is lost.

I want to slow down scrolling near the center, so the page doesn’t jump 
arround unpredictably. Instead, the user can recognize that the finger got too 
close to the center.

Alternatively (probably bad), the center could move adaptively to the fingers 
movement, guessing the users intention.

Where can I make improvements to the touchpad code? (Where is the touchpad 
code at all?) What do I need to be careful about?

Cheers,
David Hurka