[DIGImend-users] Fwd: Re: Genius Mousepen and Krita

[Nikolai K. <sp...@gm...>]

Forwarding to DIGImend-users maillist to keep others posted.

-------- Original Message --------
Subject: Re: Genius Mousepen and Krita
Date: Thu, 17 May 2012 17:29:32 +0300
From: Nikolai Kondrashov <sp...@gm...>
To: Donnie Bigers <cha...@be...>

Hi Donnie,

On 05/17/2012 08:54 AM, Donnie Bigers wrote:
> Hi. First of all, thanks for all of your efforts in helping fellow Linux users.

You're welcome :)

> My question concerns pressure sensitivity with Krita and the UC-Logic
> Technology Corp. Tablet WP8060U.
>
> The tablet is a Genius 8x6 Mousepen combo. I do not care if I ever get the
> mouse portion of the tablet to work since I don't use it. Pressure
> sensitivity for the pen is my main concern.
>
> As you probably guessed, it works fine in Gimp and in MyPaint. I believe
> the EVDev picks it up, so it works fine in those programs.
>
> I believe the problem is that Krita uses QT. Qt does not support non wacom
> tablets. So I was thinking if I could find a way to get this tablet
> recognised as a Wacom, it might work in Krita as well.
>
> Any ideas on how I need to proceed would be appreciated. I am not entirely
> sure I will even keep using Krita (I just recently discovered it) but it
> would be nice to have pressure if I do decide to continue using the
> program.

I have such a tablet myself (in fact it was the reason I started all this
work about 8 years ago). I've just tried it with Ubuntu 12.04 and Krita and
indeed it doesn't work. Although, I remember it working with Krita before.

There is no easy solution, unfortunately. Without a doubt, Qt should be
fixed and I see Viktoria Simon has already reported a bug
(https://bugreports.qt-project.org/browse/QTBUG-25329). There is already a
quick fix to Qt mentioned there.

Another approach for now would be to make your tablet appear as a Wacom one.
However, it's not easy to do, because the wacom driver doesn't easily agree
with tablets not reporting pen proximity (such as yours). It could be made
to, but last time I checked (about 2 years ago) it required quite noticeable
changes.

So, your best bet is to push for proper Qt fix and maybe try to use the
quick fix mentioned above.

Will you be able to build your own version of Qt packages with the fix
applied? If not, I could try building one for you, but am not sure when I'll
find the time.

Sincerely,
Nick