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From: Po Lu <luangruo@yahoo.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: master 101bbd1392: Add support for pinch gestures to the XI2 build
Date: Sun, 26 Dec 2021 18:58:50 +0800	[thread overview]
Message-ID: <87v8zb4oph.fsf@yahoo.com> (raw)
In-Reply-To: <83bl13pre2.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 26 Dec 2021 12:55:17 +0200")

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Po Lu <luangruo@yahoo.com>
>> Cc: emacs-devel@gnu.org
>> Date: Sun, 26 Dec 2021 18:51:21 +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.

Thanks.



  reply	other threads:[~2021-12-26 10:58 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 [this message]
2021-12-26 11:01           ` Eli Zaretskii
2021-12-26 11:26             ` Po Lu

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