From: Eli Zaretskii <eliz@gnu.org>
To: Po Lu <luangruo@yahoo.com>
Cc: emacs-devel@gnu.org
Subject: Re: master 101bbd1392: Add support for pinch gestures to the XI2 build
Date: Sun, 26 Dec 2021 13:01:00 +0200 [thread overview]
Message-ID: <838rw7pr4j.fsf@gnu.org> (raw)
In-Reply-To: <87v8zb4oph.fsf@yahoo.com> (message from Po Lu on Sun, 26 Dec 2021 18:58:50 +0800)
> From: Po Lu <luangruo@yahoo.com>
> Cc: emacs-devel@gnu.org
> Date: Sun, 26 Dec 2021 18:58:50 +0800
>
> >> DX and DY are represented in an imaginary unit where 1.0 is the
> >> horizontal width and vertical height of the touchpad (or more precisely,
> >> depedent touch device, which might include Wacom tablets if their
> >> drivers are configured in a special way) respectively.
>
> > This should be documented.
>
> Yes, I'll do that.
>
> > But I wonder how these two values are useful, if their units are not
> > pixels and not anything that can be converted to pixels?
>
> You are supposed to multiply it by the dimensions of whatever object is
> onscreen: in image-mode, it could be the dimensions of the image, while
> in a message buffer it could instead be the dimensions of the window's
> text area.
But you said above that the value 1.0 is the size of the touchpad, not
of the image or text window? So now I'm confused.
next prev parent reply other threads:[~2021-12-26 11:01 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-26 7:36 master 101bbd1392: Add support for pinch gestures to the XI2 build Eli Zaretskii
2021-12-26 10:03 ` Po Lu
2021-12-26 10:31 ` Eli Zaretskii
2021-12-26 10:39 ` Po Lu
2021-12-26 10:48 ` Eli Zaretskii
2021-12-26 11:09 ` Po Lu
2021-12-26 11:28 ` Eli Zaretskii
2021-12-26 11:37 ` Po Lu
2021-12-26 11:44 ` Po Lu
2021-12-26 11:51 ` Eli Zaretskii
2021-12-26 11:53 ` Po Lu
2021-12-26 11:58 ` Eli Zaretskii
2021-12-26 12:12 ` Po Lu
2021-12-26 10:42 ` Eli Zaretskii
2021-12-26 10:51 ` Po Lu
2021-12-26 10:55 ` Eli Zaretskii
2021-12-26 10:58 ` Po Lu
2021-12-26 11:01 ` Eli Zaretskii [this message]
2021-12-26 11:26 ` Po Lu
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