Virtual Touch Events for XTEST

[Prakash P]

Thanks for your valuable help peter.

As you suggested, I am able to simulate touch events by  using uinput
"virtual touch driver" and modified xorg.conf to load it. But the only
quirk is, I have to create a separate "virtual touch device" and xorg.conf
for each instance of X session.

Commands I used,


*> Xorg -noreset +extension GLX +extension RANDR +extension RENDER -logfile
./12.log  -config ./session20.xorg.conf :20> *
The session20.xog.conf contains InputClass Entry to load only the Virtual
Touch Device. ( I removed all generic touch device Input classes from the
default xorg.conf otherwise the virtual touch device is getting loaded for
all x sessions.)







*Section "InputClass"        Identifier "Virtual Touch Device - 0x20"
    MatchProduct "Virtual Touch Device - 0x20"        MatchIsTouchscreen
"on"        MatchDevicePath "/dev/input/event*"        Driver
"evdev"EndSection*

I am unable to figure out how to share an "uinput device" across virtual X
sessions.

The sample code for "Virtual Touch Device" can be found in
https://drive.google.com/file/d/0B2lQr8WlvKmzUVNDN0dETUVodEU/view?usp=sharing

Thanks,
Prakash

On 23 February 2017 at 08:29, Peter Hutterer <peter.hutterer at who-t.net>
wrote:

> On Wed, Feb 22, 2017 at 12:25:07PM +0530, Prakash P wrote:
> > ​​
> > Hi,
> >
> > I want to create an virtual test environment for my web application. I
> got
> > it working with the help of xvfb and running google-chrome inside it. I
> am
> > able to send keytrokes and mouse events through the xdotool
> > http://www.semicomplete.com/projects/xdotool which internally uses
> XTEST.
> >
> > I do have some test cases where I have to send touch events to the chrome
> > browser. Unfortunately the xdotool does not support sending touch
> events. I
> > am unable to find any info about whether XTEST supports touch events or
> not..
>
> it doesn't support touch events, so going down that route isn't possible.
>
> > I tried creating a "virtual touch device" using user mode input subsystem
> > "uinput" which works only on the logged in x-org session. I am able to
> send
> > touch events [Code attached in the bottom].
> >
> > But the Xvfb dont care about the virtual uinput devices the "xinput list"
> > revealed only the following.
> >
> > >sudo DISPLAY=localhost:2.0 xinput list
>
> xvfb only initializes dummy input devices that don't do anything.
>
> > *⎡ Virtual core pointer                          id=2    [master pointer
> > (3)]⎜   ↳ Virtual core XTEST pointer                id=4    [slave
> > pointer  (2)]⎜   ↳ Xvfb mouse                                id=6
> > [slave  pointer  (2)]⎣ Virtual core keyboard
> > id=3    [master keyboard (2)]    ↳ Virtual core XTEST
> > keyboard               id=5    [slave  keyboard (3)]    ↳ Xvfb
> > keyboard                             id=7    [slave  keyboard (3)]*
> >
> >
> > I also tried the virtual uinput device with "Xorg X11 dummy video driver"
> > https://xpra.org/trac/wiki/Xdummy which is also not detecting the my
> > "virtual touch device" ( I ran the xorg as non root).
> >
> >
> > I am struck. I don't know where to proceed further.
> > Is there any other options available? Do I have to implement something
> else?
>
> The only option I can see is to run a full Xorg with the uinput touch
> device. Short of that, I don't think anything will help.
>
> Cheers,
>    Peter
>
> >
> > Any help would be greatly appreciated.
> >
> > Thanks,
> > Prakash
> >
> >
> > Notes,
> > 1. Starting X virtual frame buffer -  "Xvfb :2 -screen 0 1600x900x24"
> > 2. virtual touch device uinput code -
> > https://drive.google.com/open?id=0B2lQr8WlvKmzZjhJOHB0b0x4ZGc   (with
> the
> > help of  http://thiemonge.org/getting-started-with-uinput )
> > 3. For the xvfb - I used CentOS 7.3 with Xorg -  1.17.2, pixman 0.34.0,
> > kernel -3.10.0
> > 4. For the x dummy driver - I used ubuntu 16.10 with Xorg 1.18.4, pixman
> -
> > 0.33.6 , kernel -4.10.
> >
> >
> > --
> > Anyone who has never made a mistake has never tried anything new.
>
>


-- 
Anyone who has never made a mistake has never tried anything new.
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