I have several KDE apps in my KDE session (e.g. Dolphin, Kate, Kontact) that use a Gtk-style appearance. For example, Dolphin shows different symbols for the tree expansion and also disobeys my single-click option for file opening:
http://i.stack.imgur.com/dN8nQ.png
On a different machine, my Dolphin looks and works just fine:
http://i.stack.imgur.com/7wbNV.png
Other apps (e.g. KGpg, Kile) do not show this unexpected behaviour. I have used the KDE settings to configure the Gtk look and feel but to no avail. Removing the gtk3 package from the system fixes the issue (although it breaks other stuff so not an option).

I am using Archlinux with up-to-date Plasma 5/ applications.

If you change the 'KDE System Settings > Application Style > Widget style' to the Breeze/GTK+ is the change also marked to the ~/.config/kdeglobals ?

Line is:

Code: Select all

widgetStyle=breeze

When I change the 'KDE System Settings > Application Style > Widget style' the change is written to

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~/.config/kdeglobals

. Btw, the System Settings are also not affected by by single click configuration.

Other apps (e.g. KGpg, Kile) do not show this unexpected behaviour...

Both KGpg and the Kile are KDE4/Qt4 applications. Dolphin is a KDE Frameworks 5 / Qt5 application.

The Arch has wiki: 'Uniform look for Qt and GTK applications' - https://wiki.archlinux.org/index.php/Un ... plications
Are you using the environment variable overrides ?

Arch wiki: Environment variables - https://wiki.archlinux.org/index.php/en ... _variables

At here setting the 'QT_STYLE_OVERRIDE' so the 'printenv' is showing:

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$ printenv | grep QT_STYLE_OVERRIDE
QT_STYLE_OVERRIDE=GTK+


After the problem initially occurred I set QT_STYLE_OVERRIDE to Breeze. Using printenv, I see that it is set. It does not seem to have an effect.

It also affects the colour theme of my applications.

What is the value of the QT_QPA_PLATFORMTHEME environment variable?