GTK themes in Qt applications

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Setup

The GTK style for Qt can be built by setting the gtk USE flag for dev-qt/qtwidgets.

Set the gtk USE flag:

FILE /etc/portage/package.use
dev-qt/qtwidgets gtk

Now rebuild the package with its new USE flag:

root #emerge --ask --changed-use dev-qt/qtwidgets

Configuration

You might need to reselect the preferred theme for Qt applications using qtconfig (from dev-qt/qt3support):

user $qtconfig

or 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.

GTK 2 alternative

An alternative for users of GTK 2 and Qt5 is using the QtCurve cross-toolkit theme:

root #emerge --ask x11-themes/qtcurve

The 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.