Bug#792119: Plugin is installed to kde4 path

[Josep Febrer <josep@josepfebrer.com>]

El Diumenge, 12 de juliol de 2015, a les 11:56:22, Lisandro Damián Nicanor 
Pérez Meyer va escriure:
> I have just found out that running qtconfig-qt4 and selecting "Desktop
> theme", saving and restarting it will make it use Breeze theme on Plasma 5.
> 
> If the kde4 plugin gets in QT_PLUGIN_PATH then it's also showed in qtconfig-
> qt4, but I higly doubt that's sensible enough.
> 
> Maybe what we are missing is a way to select qt4's theming from inside
> Plasma 5 itself.

I think this issue is related to this upstream bug:

https://bugs.kde.org/show_bug.cgi?id=349371

Also you can see the Fedora related bug report:

https://bugzilla.redhat.com/show_bug.cgi?id=1233298

You can fix editing the startkde script and commenting the lines 221, 223 and 
224.

Then if you want that Qt4 applications uses KDE4 styles under Plasma 5 you can 
write a Plasma 5 startup script under ~/.config/plasma-workspace/env.
For example I created one called qt4pluginpath.sh with this content.

#!/bin/sh

export QT_PLUGIN_PATH=/usr/lib/x86_64-linux-
gnu/qt4/plugins/:/usr/lib/kde4/plugins/

After that and login back to Plasma 5, the Qt4 applications can use for 
example the Breeze style.

Best regards,

Josep