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Re: mouse-wheel-scroll

From: Eli Zaretskii
Subject: Re: mouse-wheel-scroll
Date: Sun, 02 Apr 2017 19:37:55 +0300

> From: Richard Copley <address@hidden>
> Date: Sun, 2 Apr 2017 11:41:39 +0100
> Cc: Dani Moncayo <address@hidden>, Emacs Development <address@hidden>
> >> if what Raymond Chen calls a
> >> "sub-detent mouse" was involved. (See "Scrollbars bart [sic] 6 – The 
> >> wheel",
> >> "https://blogs.msdn.microsoft.com/oldnewthing/20030807-00/?p=42963";.)
> >
> > What that blog suggests, AFAIU, means that the amount of scrolling
> > could not be controlled via the system customization interfaces, only
> > via Emacs's user options.
> I'm confused. The blog says "the amount of scrolling is a user setting
> which must be respected", and the sample code "requeries the user's
> desired scroll delta at each mouse wheel message". But I don't see
> anything there that applies to Emacs's user options. They are outside
> its scope.

They mean system-wide user settings, not settings specific to

> > Is that what we want?  It would mean that
> > Emacs behaves differently from other applications on the same system.
> Confused again. The blog is only about the interpretation of wheel messages.
> How we respond to the messages is under our control. What they mean is not.

My reading of the code presented there is that, if we go the way they
suggest, scrolling in Emacs will be unaffected by the system-wide
customizations.  Maybe I misunderstood.

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