[Interest] Qt and x11/MPX

[Thiago Macieira]

On terça-feira, 14 de fevereiro de 2012 14.14.49, Robert Voinea wrote:
> Hi
> 
> Update:
> 
> I have installed and tested Ubuntu 11.10... But I have no luck.
> I can confirm that qt has the xinput-2.1 patch applied since
> 4:4.7.1-0ubuntu10 (see changelog here:
> https://launchpad.net/ubuntu/+source/qt4-x11/+changelog)

That's not an upstream patch. You need to talk to Ubuntu if it doesn't work.

> Just to be clear, my setup is a two-touchscreen dual monitor setup.
> For some reason the touch-screens are seen as mice... But that does not seem
> to bother X... since the demo app works even in this case.
> 
> "fingerpaint" is not working. Mouse interactions work (menu & stuff) but no
> painting... (no TouchEvent).
> 
> Apparently... this type of setup (multiple master pointers) is not supported
> by the [meego] patch. I don't know if the ubuntu patch is the same as the
> one for meego... but... if this is the case... I'm out of luck.
> 
> https://bugs.meego.com/show_bug.cgi?id=17865#c2

You're not using the MeeGo patch. You're using Ubuntu's. The MeeGo patch is an 
XInput 2.0 hack.

> [quote]
> MeeGo 1.2 only supports a single master pointer per display.
> 
> Support for multiple master pointers requires more invasive patches into Qt
> 4.7.x and were out of scope for 1.2.
> [/quote]

Note that master pointers are not the same thing as touch points. Each master 
device can have multiple touch points.

What Qt does not support is multiple pointers, including multiple focus. 
That's what MPX is for and there are no plans of supporting that, ever. Touch 
is different.

> *New approach :D*
> 
> ...Does anyone know of a device driver for X that combines "mouse events"
> into one touch event? :D

The MeeGo "mtev" driver as well as XInput 2.1 and 2.2.

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
   Software Architect - Intel Open Source Technology Center
      PGP/GPG: 0x6EF45358; fingerprint:
      E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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