Re: mouse-wheel-scroll

[Alan Third]

On Mon, Apr 03, 2017 at 05:37:21PM +0300, Eli Zaretskii wrote:
> > Date: Mon, 03 Apr 2017 14:50:49 +0900 (JST)
> > Cc: address@hidden, address@hidden
> > From: Tak Kunihiro <address@hidden>
> > 
> > (2) Touchpad and Trackbar
> > 
> > Using touchpad or trackbar on laptop computers, I think that defaults
> > scroll too fast, especially by trackbar.  Don't you think so?
> 
> I will try that later.
> 
> > Laptop computers without mouse are common.  I wonder if unusable on
> > laptop computers without mouse beats inconvenience on desktop
> > computers with mouse.
> 
> If we can more-or-less reliably detect each situation, sure, adapting
> Emacs to each one would be an improvement.  Does anyone know how to
> detect them?

As far as I can tell on macOS the two‐finger touchpad gesture and the
scrollwheel result in different types of ‘deltas’ being returned. We
may be able to identify which type of delta is in use and treat them
differently.

I can’t speak for MS Windows, or any other environment, though.

(FWIW, I have progressive scroll turned off in Emacs.)
-- 
Alan Third