bug#35389: 27.0.50; [PATCH] Emacs on macOS sets mouse-wheel variables directly

[Eli Zaretskii]

> From: Tak Kunihiro <homeros.misasa@gmail.com>
> Cc: Tak Kunihiro <homeros.misasa@gmail.com>,  alan@idiocy.org,  
> 35389@debbugs.gnu.org,  rpluim@gmail.com,  npostavs@gmail.com
> Cc: tkk@misasa.okayama-u.ac.jp
> Date: Sat, 18 May 2019 17:50:58 +0900
> 
> To maintain relationship that is to scroll less on Shift, scroll with
> Shift should be 3 pixel when scroll without Shift is 1 line (15 pixel).
> I thought it is not possible to do even using float value.

Doesn't the macOS implementation adds pixels until it gets enough for
scroll, before scrolling?  If so, why would it be impossible to equate
a mouse-wheel action to sub-line pixel number?