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

From: Tak Kunihiro <[email-masked]>
Date: Fri, 17 May 2019 08:24:48 +0900

>> >>   3. Value (1 ((shift) . 5) ((control))) is good for typical scroll and
>> >>   occasional fast scroll with the muscle memory.
>> >
>> > Item 3, the current default on macOS, makes Shift have the opposite
>> > effect from what it produces on other platforms.  Which is in general
>> > against our policy, AFAIU.
>> 
>> Value (1 ((shift) . 1) ((control))) isn't as useful as value (1 ((shift)
>> . 5) ((control))), is it?
>
> The values can be floats, not just integers.

True.  However, scrolling with float value is relative to number of
lines in a screen.  Value (1 ((shift) . 0.2) ((control))) is equal to
value (1 ((shift) . 10) ((control))).

To scroll less on shift, pixel-wise scroll is required, which is
possible on theory.