bug#57140: New user option mouse-wheel-text-scale-buffer

[Tyler Grinn]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Tyler Grinn <tylergrinn@gmail.com>
>> Cc: 57140@debbugs.gnu.org
>> Date: Thu, 11 Aug 2022 13:00:45 -0400
>> 
>> Eli Zaretskii <eliz@gnu.org> writes:
>> 
>> >> From: Tyler Grinn <tylergrinn@gmail.com>
>> >> Cc: 57140@debbugs.gnu.org
>> >> Date: Thu, 11 Aug 2022 11:23:51 -0400
>> >> 
>> >> Eli Zaretskii <eliz@gnu.org> writes:
>> >> 
>> >> > Thanks, but isn't it better to control the amount of scaling by
>> >> > changing the value of text-scale-mode-step instead?  Having to scroll
>> >> > the wheel several clicks without any effect would be confusing, I
>> >> > think.  And text-scale-mode-step is already a user variable that is
>> >> > available for this purpose.  So maybe you should try decreasing the
>> >> > default value to, say, 1.02, to see if that satisfies your needs.
>> >> 
>> >> For some trackpads, controlling how many 'clicks' to scroll is quite
>> >> difficult. The step size fixes the issue of scrolling too fast, but I
>> >> still have trouble choosing the exact text scale I want. My preference
>> >> is still for a larger step size and throttling scroll events.
>> >
>> > Sorry, I don't understand why you need to count clicks.  Typically
>> > when users change the text scale, they just turn the wheel until the
>> > size they get fits their needs.  Making text-scale-mode-step smaller
>> > causes finer changes, so it's easier to be more precise in finding the
>> > desired scale.
>> >
>> > Can you explain how your proposal makes it easier than that, and why?
>> 
>> Sure, let me rephrase: for two-finger scrolling, it's hard to emit a
>> single scroll event. With a smaller step size it is easier to get it
>> close to the scale I want, but regardless of the step size, choosing an
>> exact text scale is difficult. This leads to buffers having slightly
>> different text scales.
>
> If that's the problem, shouldn't that be handled by techniques we use
> in precision-scrolling?

Could you expand on that?