[Development] Removing Wacom support in Qt5

[Laszlo Agocs]

About the state of QTabletEvent in Qt 5: For platforms other than xcb this
event will never be delivered. To be on par with Qt 4 somebody needs to
step up and add support for Windows and OS X. The support on QPA level is
there in QWindowSystemInterface, now it's up to the platform plugins to do
something with it.

On Linux, QTabletEvents are supported, I added this a few months back using
my Wacom Bamboo. It should be considered experimental though. Event
delivery, position and pressure, proximity enter/leave seem to work. Other
things (e.g. additional properties like tilt which I cannot test with the
Bamboo) may not.

Laszlo

On Thu, Sep 6, 2012 at 10:41 AM, Boudewijn Rempt <boud at valdyas.org> wrote:

> On Thursday 06 September 2012 Sep, Thiago Macieira wrote:
> > On quinta-feira, 6 de setembro de 2012 09.13.01, Boudewijn Rempt wrote:
> > > > But since I made the suggestion to remove it: if we can't get it
> tested
> > > > and  get it to work, just disable the support. No code needs to be
> > > > removed. Just make the loading of the Wacom DLL always fail.
> > >
> > > So, basically, QTabletEvent will still exist, but will be useless?
> >
> > It will never be delivered.
>
> Right, so it will be useless, then. Code will compile, but the application
> will be broken and porting to Qt5 will become a really difficult task.
>
> I know that there are problems with Qt and tablet support -- that with
> some versions of the wacom driver on Windows, there are way too many events
> happening for an application to manage, or that on Linux only Wacom tablets
> and no non-wacom tablets are supported and so on (though there's a patch in
> Jira for that).
>
> For me as an application developer, I wonder what the alternative would
> be. I guess to write two platform specific event handlers myself (win and
> X11, I cannot afford a Mac) and synthesize the QTabletEvents... Do a fund
> raiser to get me some different kinds of tablets and see how to support
> those.
>
> --
> Boudewijn Rempt
> http://www.valdyas.org, http://www.krita.org, http://www.boudewijnrempt.nl
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