Re: Context menus and mouse-3

[chad <yandros@gmail.com>]

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On Thu, Sep 17, 2020 at 1:28 AM Juri Linkov <juri@linkov.net> wrote:

> >>> - Horizontal scroll by wheel is supported.
> >>> - Moving text using mouse is supported.
> >
> >> Please explain how horizontal scroll by wheel is supported.
> >> Also please explain how moving text using mouse is supported.
> >
> > Try something like this.
> >
> > (setq mouse-wheel-tilt-scroll t)
>
> I tried this, but still it doesn't scroll horizontally
> with the mouse wheel.  It seems this feature expects the
> mouse events mouse-6 and mouse-7, but scrolling the mouse wheel
> produces mouse-4 and mouse-5.
>

FWIW, emacs uses the "original" (I think they started with XFree86?)
bindings that treat up/down mouse wheel as mouse buttons 4/5, while
left/right are 6&7, so this is working as (at least at one point in the
past) intended. There might be a communication issue around "by wheel"
here: are you using a mouse with a wheel that tilts to the left/right? I
believe that's what the OP had in mind.

(There is some added complication here, in that windows and macos seem to
use mouse-up/down/left/right, whereas the x11 code uses mouse-4/5/6/7. My
current environment is a little odd, but it seems like gtk (ala emacs-pgtk)
ise still using the numbers rather than the names.)

Poking around the internet suggests that the "standard" for horizontal
roll-the-wheel-scrolling is to add shift to rolling the wheel (and this
works in the couple apps that I tried). Emacs' mwheel.el doesn't currently
do this, but it looks like it wouldn't be hard to add.

~Chad

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