Re: Touchscreen support

[Lars Ingebrigtsen]

Po Lu via "Emacs development discussions." <emacs-devel@gnu.org> writes:

> I implemented the events required for full touchscreen support for
> XInput 2.  These events are generated only for DirectTouch devices,
> which means real touchscreens only, no touchpads.

That's fantastic -- proper touchscreen support is something I've been
wanting to have in Emacs for at least a decade.

One question:

> Please take a look and see if the API I'm exposing is useful, and also
> easy enough to implement on non-X platforms.
> +The low-level touchscreen events described below can be used to
> +implement all the touch sequences described above.  In those events,
> +each point is represented by a cons of an arbitrary number identifying
> +the point and a mouse position list (@pxref{Click Events}) specifying
> +the position of the finger when the event occurred.

What would the implementation of a (for instance) "three finger swipe
left" event look like based on these primitives?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no