bug#23786: 25.0.95 and 24.5: NS variants both scroll too much

[Jiajie Chen]

Peter Dyballa <Peter_Dyballa@Freenet.DE> writes:

This are the settings I am using:

(setq mouse-wheel-scroll-amount '(1 ((shift) . 1))) ;; one line at a time
(setq mouse-wheel-progressive-speed nil) ;; don't accelerate scrolling
(setq mouse-wheel-follow-mouse 't) ;; scroll window under mouse

Not very smooth but slow enough indeed. For more information, see 
https://www.emacswiki.org/emacs/SmoothScrolling.

> Hello!
>
> These two Emacsen,
>
> In GNU Emacs 25.0.95.1 (x86_64-apple-darwin13.4.0, NS appkit-1265.21 Version 
> 10.9.5 (Build 13F1603))
>  of 2016-06-11 built on builder10-9.local
> Windowing system distributor 'Apple', version 10.3.1404
> Configured using:
>  'configure --with-ns '--enable-locallisppath=/Library/Application
>  Support/Emacs/${version}/site-lisp:/Library/Application
>  Support/Emacs/site-lisp''
>
> Configured features:
> NOTIFY ACL LIBXML2 ZLIB TOOLKIT_SCROLL_BARS NS
>
> Important settings:
>   value of $LANG: de_DE.UTF-8
>   locale-coding-system: utf-8-unix
>
> and
>
> In GNU Emacs 24.5.1 (x86_64-apple-darwin15.4.0, NS apple-appkit-1404.46)
>  of 2016-05-13 on demucwolf85.muc.de.ad.dom
> Windowing system distributor `Apple', version 10.3.1404
> Configured using:
>  `configure --with-ns --disable-ns-self-contained
>  '--enable-locallisppath=/Library/Application Support/Emacs''
>
> Important settings:
>   locale-coding-system: utf-8-unix
>
> and
>
> In GNU Emacs 25.0.95.1 (x86_64-apple-darwin13.4.0, NS appkit-1265.21 Version 
> 10.9.5 (Build 13F1603))
>  of 2016-06-11 built on builder10-9.local
> Windowing system distributor 'Apple', version 10.3.1404
> Configured using:
>  'configure --with-ns '--enable-locallisppath=/Library/Application
>  Support/Emacs/${version}/site-lisp:/Library/Application
>  Support/Emacs/site-lisp''
>
> Configured features:
> NOTIFY ACL LIBXML2 ZLIB TOOLKIT_SCROLL_BARS NS
>
> Important settings:
>   value of $LANG: de_DE.UTF-8
>   locale-coding-system: utf-8-unix
>
> and
>
> In GNU Emacs 25.0.95.1 (x86_64-apple-darwin15.5.0, NS appkit-1404.47 Version 
> 10.11.5 (Build 15F34))
>  of 2016-06-17 built on demucwolf85.muc.de.ad.dom
> Windowing system distributor 'Apple', version 10.3.1404
> Configured using:
>  'configure --with-ns --disable-ns-self-contained
>  '--enable-locallisppath=/Library/Application Support/Emacs''
>
> Configured features:
> RSVG IMAGEMAGICK NOTIFY ACL GNUTLS LIBXML2 ZLIB TOOLKIT_SCROLL_BARS NS
>
> Important settings:
>   value of $LANG: de_DE.UTF-8
>   locale-coding-system: utf-8-unix
>
> all scroll too much when I use the extra Bluetooth trackpad of an iMac (27“, 
> Late 2013) instead of the Mighty Mouse.
>
> For example in Safari, reading an entry in Wikipedia, the scrolling action is 
> OK, I can easily synchronize speed of reading and speed of scrolling. In the 
> NS variants the scrolling is much too fast, I would need to move my two 
> fingers by µm/sec and not by human mm/sec. Or is there a hidden setting I 
> have to change?
>
> The X client,
>
> In GNU Emacs 24.5.1 (x86_64-apple-darwin15.4.0, X toolkit, Xaw3d scroll bars)
>  of 2016-05-04 on demucsculz39-02.muc.de.ad.dom
> Windowing system distributor `The X.Org Foundation', version 11.0.11604000
> Configured using:
>  `configure --with-x '--enable-locallisppath=/Library/Application
>  Support/Emacs''
>
> Important settings:
>   value of $LANG: de_DE.UTF-8
>   locale-coding-system: utf-8-unix
>
> behaves quite OK with XQuartz 2.7.8 (xorg-server 1.16.4) and XQuartz 2.7.9 
> (xorg-server 1.17.4). Here it’s possible to set the amount or speed of 
> scrolling.
>
> (Mac) OS X 10.11.5 (15F34), El Capitan. Bluetooth keyboard and Bluetooth 
> trackpad.
>
> —
>
> Greetings
>
>   Pete
>
> f u cn rd ths, itn tyg h myxbl cd.