Re: [DIGImend-devel] Testing Huion GT-190 on Linux Mint 17.3

[Bernd W. <bwe...@ya...>]

Well it's a quiet time of year all right. Not much traffic on this list 
it seems.

On the flip side it affords a little free time (which I would much 
rather spend on other things but hey, I need to get the tablet working 
it was a Christmas gift ;-).

In that time I am pleased to say I have been in discussion with Daniel 
Pinheiro Lima and learned much. To wit I hacked this up quickly today:

https://github.com/bernd-wechner/tablet-config

may it be of use to others and self explanatory.

Easily the best documentation I found was here:

https://wiki.archlinux.org/index.php/Calibrating_Touchscreen

And things I have learned along the way:

 1. xinput_calibrator is broken and simply does not work for dual
    monitors. I'd be interested in trying to fix it if I can get time.
    simply needs to constrain its interest to a nominated monitor and
    not the whole X screen. I'm not sure what issues this may pose alas,
    not having a calibrator. Mostly touchscreens are pretty fine as is,
    but the purist in me certainly believes it's handy to be able to
    recalibrate.
 2. xrestrict probably does what my script does only better ;-). I
    haven't tried it yet but I hope to if I have time. In particular it
    may be easier in C to use the pen and monitor to determine the
    association between the two that is needed. But it's sloppy no
    matter what as it takes a little learning to work out where to look
    for the cursor when you approach the tablet with your pen.
 3. GIMP 2.8 can't read pen pressure though allegedly GIMP 2.6 can and
    GIMP 3.0 will be able to. Krita has no problem with it though and rocks

It would be lovely to see the connection between the monitor and pen 
made automatically using ID information probably in the EDID (that 
xrandr --verbose reveals) and the USB ID (that lsusb reveals). Somewhere 
there would need to be a mapping I suspect and this could then work out 
of the box, or?

Regards,

Bernd.