Developing an GLFW app that links makes use of KWindowEffects?

[David Faure]

On mercredi 16 octobre 2019 09:30:13 CEST Christian Parpart wrote:
> Hi guys,
> 
> I hope I landed into the right channel (it's many many years ago I did
> stuff with KDE), so I've to apologize in advance, eventually. :-)
> 
> I am developing an OpenGL / GLFW application (for highest platform
> independence and easiest porting efforts). It's basically a terminal
> emulator, and I want the background to be optionally transparent (done) but
> also blurred (done for windows, not linux/mac). I found out, that for KDE's
> konsole, it's not doing it by itself but using
> KWindowEffects::enableBlurBehind(...) instead, which is more or less how
> you do it on Windows 10 too. However, making use of it and linking against
> KF5::WindowSystem tells me that it couldn't find any plugins.
> *org.kde.kwindowsystem: Could not find any platform plugin*

That is "just" a deployment problem.

Did you build KWindowSystem yourself or use a Linux package?
In the first case, does `make install` show a file like
.../plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
?
And if this isn't in a standard location like /usr/lib, did you export 
QT_PLUGIN_PATH to point to that plugins library? (without the kf5/org.[...])

> Also, I highly doubt I can just pump in the X11 `Window` (XID) handle to
> `enableBlurBehind`'s first param, but I couldn't figure how to construct a
> `WId` without fully transforming my program into a full KDE/Qt app.

Well, if you do have a X11 Window ID, I actually believe you can just pass 
that, that's what Qt's WId means, on X11.

> Is there a way without fully converting into KDE app

This sentence, nowadays, doesn't mean what you think it does ;)
This app isn't developed by the KDE community, so it's not a KDE app, by 
definition. You mean "without using other KF5 frameworks", and the answer is 
yes, you can use KWindowSystem without using other KDE Frameworks.

Hope this helps,

-- 
David Faure, faure at kde.org, http://www.davidfaure.fr
Working on KDE Frameworks 5