Re: [STUMP] Multitouch in StumpWM

[Alexander Popolitov]

Yes, I was talking about this series of posts.
So, I think, it is indeed a good idea to start implementing XInput in 
CLX and see, where this will lead.
Obviously, grabs on devices are the way to muffle events intended for 
other windows,
I hope, I'll find a way to inject new events as I'll get more familiar 
with XInput.

Thank you very much,
Alex

On 12/07/2013 10:34 PM, Shawn Betts wrote:
> Hi Alex,
>
> Are you talking about this:
>
> http://who-t.blogspot.ca/2011/12/multitouch-in-x-getting-events.html
>
> If so then what you need to do is implement the X Input 2.2 extension
> in CLX. It might not actually be all that hard. Hell, maybe someone
> has already done it?
>
> The X protocol is just bits and bytes sent over a socket. So anything
> can implement the protocol and be an X client. That's what CLX does.
> It implements the protocol from the ground up in Lisp. For better or
> worse that means you can't just piggyback off all the work done in C
> and write a little FFI code to get access to the functionality.
>
> Anyway, if you have the time and energy it might be a lot of fun to
> implement XInput in CLX. You'd probably get a warm round of applause
> from the lisp community.
>
> -Shawn
>
> On Fri, Dec 6, 2013 at 3:21 PM, Alexander Popolitov <address@hidden> wrote:
> > On 12/06/2013 10:12 PM, J. David Smith wrote:
> >
> > I am. I have a tablet that I've looked at converting into a mini linux box
> > and was wondering if a solution like this existed.
> >
> > So now I've read through Peter Hutterer's blog, where he explains, how to
> > get multitouch events from C code, but I'm rather confused.
> > As far as I understand, StumpWM listens to events from X server using CLX
> > library, and then dispatches those events to opened windows.
> >  From that I'd expect, that CLX would be heavily using FFI's to call
> > C-functions, but the only C-related code there seems to be in the socket.c
> > file.
> > And absence of touch* events in CLX's DECLARE-EVENT macros seems to
> > indicate, that there's no multitouch support already in CLX.
> >
> > So:
> > 1) does event-dispatching indeed occur like this (X server -> StumpWM ->
> > windows), or windows receive events somehow directly from X?
> > 2) How does CLX manage to avoid all this fuss with FFI-ying bunch of
> > C-functions? Perhaps, it's using some yet more lower-level API?
> >
> >
> > On Fri, Dec 6, 2013 at 5:38 PM, Alexander Popolitov <address@hidden>
> > wrote:
> > > Hello everyone,
> > >
> > > I've recently bought x86 tablet and managed to run on it linux + SBCL +
> > > StumpWM just fine.
> > > However, interaction still heavily relies on keyboard, and I want to make
> > > it, somewhat useable in 'touchscreen-only' mode)
> > > I've quickly hacked https://github.com/mabragor/stump-touchy-mode-line,
> > > which, together with TouchEgg launched
> > > at startup, makes the whole setup useable.
> > >
> > > So now I'm aimed at proper multitouch support within StumpWM, so the
> > > question is: is anybody interested in this
> > > other than me?
> > >
> > > Best regards,
> > > Alex
> > >
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> >
> >
> >
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