First version of the x11 tablet support code for Krita 3.0

[Boudewijn Rempt]

Cool work! Ill build the branch before I have to go back to "work" -- but it might be a good idea to put hte diff on phab, too, for easier reviewing.

On Sat, 12 Dec 2015, Dmitry Kazakov wrote:

> Hi, all!
> 
> I have just pushed my branch 'krita-tablet-x11-kazakov', where I implemented the first 'forked' version of the tablet support code
> for Qt5. Please review it, and, if possible, test :)
> 
> There are a lot of things not working yet:
> 
> 1) Keyboard modifiers do not work (I didn't fork that part yet).
> 2) Popup palette doesn't have a cursor for some reason.
> 3) Canvas decorations' event filters are not tested (I just don't know if they work or not)
> 
> But the main problems are solved:
> 
> 1) There are no cursor lockups due to mixed mouse events.
> 2) The strokes are very smooth (at least on Wacom devices)
> 
> What I tested already:
> 
> 1) I tested Wacom Intuos 5, Wacom Graphire 2, Genius G-Pen 560 devices and they seem to work fine.
> 2) The devices are tested on Qt 5.4 only. The code might break on other versions of Qt, who knows...
> 
> What needs to be tested:
> 
> 1) Other versions of Qt
> 2) Other tablet devices
> 3) Configurations with multiple displays
> 
> For Michael Abrahams:
> 
> Michael, could you please review my branch and check if there might be any conflicts with the refactoring you do atm? I based my
> code on your initial implementation, but I had to revert a few commits, basically the ones which did that weird filtering for
> unordered events :)
> 
> --
> Dmitry Kazakov
> 
>

-- 
Boudewijn Rempt | http://www.krita.org, http://www.valdyas.org