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@anthonyshew for your review.

The config values are subjective and based on personal preference. I tried to match native scrolling as closely as possible. While trackpads could benefit from custom settings, it's not possible to reliably distinguish between trackpad and mouse wheel, and behavior varies a lot across devices and OSes. This still feels like a significant improvement to me.

@MendyLanda, this is great! Thank you!

I tried it out and it feels much better than what we have now. Significantly better.

I'm testing with a trackpad and it felt like I would go from "no momentum" to "ALL THE MOMENTUM!!!" Could we tune the ramping? I don't have a mouse wheel around to try with so I don't know if it feels great there and re-tuning would make it feel terrible. I can suggest what values feel right to me for the trackpad if you don't have one around.

Very excited about this.

it's not possible to reliably distinguish between trackpad and mouse wheel, and behavior varies a lot across devices and OSes

And, yes, agree with this. Let's get to some best effort that feels good (particularly for trackpad vs. mouse wheel) as best we can.

@anthonyshew for trackpad setting you can try this:
THROTTLE_FACTOR: u8 = 3
ACCELERATION: f32 = 0.2

@anthonyshew for trackpad setting you can try this: THROTTLE_FACTOR: u8 = 3 ACCELERATION: f32 = 0.2

But this completely voids mouse wheel.

I am looking at Ghostty's implementation of this, maybe I can find some ideas. If you have any suggestion I'd love to know!

@anthonyshew for trackpad setting you can try this: THROTTLE_FACTOR: u8 = 3 ACCELERATION: f32 = 0.2

Confirming that these values feel great for my trackpad. 👍

I am looking at Ghostty's implementation of this, maybe I can find some ideas.

TL;DR:
It’s impossible to detect precision scrolling (touchpad) and apply the delta conditionally. This is a limitation of crossterm (ANSI codes).
So, we have two options:

1. Let the user toggle between touchpad and mouse wheel mode.
   [+] Scrolling always feels great.
   [–] We already have too many scroll-related keybinds, so adding another for something that’s usually a one-off isn’t ideal.

2. Find an acceptable middle ground that works (mostly) for both.
   [+] Doesn’t add another keybind; users don’t need to know about this.
   [+] Still feels better than what we currently have.
   [–] Could be improved further.

@anthonyshew, your call. Option 2 feels more reasonable, but personally, I’d prefer option 1 😄.
If we go with option 2, these settings seem to be a good middle ground:

const ACCELERATION: f32 = 0.3; // 2.0 is optimal for mouse wheel, but higher values make the touchpad too jumpy.
const DECAY_TIME: Duration = Duration::from_millis(350); // less than 300ms is too fast for mouse wheel; 350ms slightly favors mouse wheel.
const THROTTLE_FACTOR: u8 = 3; // Lower values make the touchpad unusable.

That feels great for me on trackpad. Soft-approved from me! Looking for a teammate with a mouse to confirm their mouse feels right...

Thank you so much for the PR! I suggested some changes in MendyLanda#1 that make it feel a little better with a mouse scroll wheel.

Thank you so much for the PR! I suggested some changes in MendyLanda#1 that make it feel a little better with a mouse scroll wheel.

Thank you! This was the missing piece! feels great on both my mouse (logitech mx2) and my mb trackpad!