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GTK+ themes in Qt applications
Qt Desktop applications need a little help to use your desktop theme in GNOME.
Setup
The GTK+ style for Qt can be built by setting the gtk USE flag for dev-qt/qtwidgets.
Set the gtkstyle USE flag.:
/etc/portage/package.usedev-qt/qtwidgets gtk
and rebuild the package with its new USE flag:
root #emerge --ask --changed-use qtguiConfiguration
You might need to reselect the preferred theme for Qt applications using qtconfig (from dev-qt/qt3support):
user $qtconfigor just delete the previous configuration files:
user $rm -r ~/.config/Trolltech*Select the Default theme to use your system settings or set it to use the GTK+ style explicitly by selecting GTK+ theme.
Tips
- Individual applications might have their own configuration settings for their GUI, e.g. in VLC this is located in Tools → Preferences.
Caveats
- 32bit applications on multilib systems are still unaware of the system's GTK+ theme, probably because app-emulation/emul-linux-x86-qtlibs is compiled without the gtkstyle USE flag enabled.
GTK+2 alternative
An alternative for users of GTK+2 and Qt5 is using the QtCurve cross-toolkit theme:
root #emerge --ask qtcurveThe downsides of this method are that it's not available for GTK+3 yet, and currently the only configuration GUI needs Qt5 and KDE Frameworks 5.