MPX and multitouch

[Jordi Polo]

I have been thinking about an architecture for gestures etc. And it is
difficult to make it out of the toolkits.

Basically, the toolkits already have an event loop where they take events
from X.
It is easy to implement mouse gestures for simple and multi pointers there.
multitouch gestures, they much more difficult but I don't see good reasons
to move them outside that even loop.

Also, I don't even know how to do it. Having a library that intercepts mouse
events process them and send their events?
And toolkits will receive mouse events and a delayed (processing) gesture
event and they should figure out is the same thing? or that library will
filter the mouse events ? is it possible? will toolkits use it?

On the MPX front, what's the state of XBlobEvent? do you get it working with
any hardware ?

On Wed, May 14, 2008 at 8:23 AM, Peter Hutterer <peter at cs.unisa.edu.au>
wrote:

> On Wed, May 14, 2008 at 12:09:43AM +0900, Jordi Polo wrote:
> >    On Mon, May 12, 2008 at 1:13 AM, Daniel Stone <daniel at fooishbar.org>
> >    wrote:
> >
> >    On Sun, May 11, 2008 at 04:44:27PM +0100, Peter Clifton wrote:
> >    > On Mon, 2008-05-12 at 00:10 +0900, Jordi Polo wrote:
> >    > > To further clarify it, I will not create gestures from multiple
> >    cursor
> >    > > devices but from single multitouch devices.
> >    > > The basic idea is take the events from X, convert them to QEvents,
> >    > > give them to a library to create gestures and send gestures and
> >    events
> >    > > that wasn't recognized as gestures to KDE apps.
> >    >
> >    > Is there a lower level this can work at, such that the library is
> >    useful
> >    > to non KDE applications as well?
> >    >
> >    > It would be nice if this kind of logic would behave uniformly across
> >    a
> >    > platform, whether an app uses QT, GTK, other..
> >
> >      If someone wants to design a cross-toolkit library that does this,
> >      I'm
> >      sure they'd be more than welcome. :)
> >
> >    I don't feel very comfortable out of Qt but I agree that doing it so
> >    that it can be reused is the best solution. I guess that it can
> >    eventually be proposed for fd.o.
> >    I will ask to the KDE people if they would use a non-qt lib for
> >    something like that.
> >    Anyway, I don't find any reference to the blobs events in the MPX web.
> >    Tomorrow I will try to compile it (it seems difficult)
>
> unfortunately the branch containing blob events is currently orphaned and
> has
> been for a while. plans are to take it up again in the next months, but
> IIRC
> right now it doesn't even build.
>
> Cheers,
>   Peter
>
>


-- 
Jordi Polo Carres
NLP laboratory - NAIST
http://www.bahasara.org
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