Android(Chromebook) Build - USI Pen Right Click support

[Sharaf Zaman]

Hi!

>  - Can someone confirm why USI Pen right click does not work? Is the too
low Android API level a reasonable root cause?

I took a quick look at the code, we don't handle the case where the button
would be BUTTON_SECONDARY (Right click) in Qt. A simple general `else`
handling would fix the problem :)

> - Is there a different instruction I can follow to rebuild Krita for
Android?

Instructions to build haven't changed, besides that we build with API level
23. The reason you get an error is because the checkout 4.4.1 uses a
different way to build kf5 which recently broke. Try 4.4.2-beta2, it should
build fine.


On Mon, Dec 28, 2020 at 9:12 PM Rafał Sontowski <rafal.sont at gmail.com>
wrote:

> Hello,
>
> I recently started using Krita on Chromebook with USI Pen support (Acer
> Chromebook Spin 713). Even in Beta Krita already is the best drawing
> application available on Chromebook! It is a pleasure to use it with a USI
> Pen with pressure supported.
>
> *Problem* - Krita does not recognize USI Pen right click, or to be strict
> - Krita does not recognize right click when I touch the canvas with USI Pen
> having Pen button pressed (this works as right click in other apps) - hence
> I cannot change the drawing tool using tools wheel :(.
>
> *Potential root cause*: support for USI Pen buttons has been added in
> Android 6.0 (API 23) -
> https://developer.android.com/about/versions/marshmallow/android-6.0#bluetooth-stylus,
> Looks like Krita for Android(and Chromebooks) is build with Android API 21,
> or 22 (at least this is what I found in building instructions)
>
> I tried to rebuild Krita myself to check if the statement above is
> correct. I am new to building KDE applications and I failed :(. I was able
> to build Krita for Linux fine, by following instructions from
> https://docs.krita.org/en/untranslatable_pages/building_krita.html#building-on-linux,
> but failed to build Krita for Android following
> https://docs.krita.org/en/untranslatable_pages/building_krita.html#building-on-android
> It stopped while building few kf5 components due to QT versions mismatch:
> {code}
> CMake Error at CMakeLists.txt:15 (find_package):
> Could not find a configuration file for package "Qt5" that is compatible
> with requested version "5.14.0".
>
> The following configuration files were considered but not accepted:
>
> /home/appimage/build/i/lib/cmake/Qt5/Qt5Config.cmake, version: 5.12.9
> {code}
> I used "git clone / git checkout tags/4.4.1" to get sources. I faced the
> same problem while I was trying to use Docker container for building as
> described at:
> https://docs.krita.org/en/untranslatable_pages/building/build_krita_with_docker_on_linux.html
>
> *Questions*:
> - Can someone confirm why USI Pen right click does not work? Is the too
> low Android API level a reasonable root cause?
> - Is there a different instruction I can follow to rebuild Krita for
> Android?
>
> regards, Rafał
>
>
>

-- 
Kind Regards,
Sharaf Zaman
https://www.sh-zam.com
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