Re: master 101bbd1392: Add support for pinch gestures to the XI2 build

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: emacs-devel@gnu.org
> Date: Sun, 26 Dec 2021 19:09:01 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Please explain how the angle deltas make sense as part of a pinch
> > gesture, I don't think I understand that.
> 
> Basically, this delta is only reported by the X server when the finger
> rotates _after_ a pinch gesture is detected, for example if the user
> zooms in, and while doing so, also rotates his fingers.  The rationale
> is that some applications might have a reason to handle these events
> separately (such as to ignore them, or to do something else with them),
> instead of simply rotating the display.

Then the current text should be amended, because it entirely misses
this aspect.