Good morning, this is a call to KDE experts on this line.
In order to react to KDE color scheme changes, Qt listens to DBus for changes (under more) of the keys * "ColorScheme" in org.kde.kdeglobals.General * "widgetStyle" in org.kde.kdeglobals.KDE A DBus signal correctly received and processed by Qt would look like that: ---snip--- method return time=1682062165.741561 sender=org.freedesktop.DBus -> destination=:1.87 serial=50 reply_serial=89 signal time=1682062165.742192 sender=:1.28 -> destination=(null destination) serial=38 path=/org/freedesktop/portal/desktop; interface=org.freedesktop.impl.portal.Settings; member=Setting Changed string "org.kde.kdeglobals.General" string "ColorScheme" variant string "BreezeLight" ---snap--- On some systems, however, none of signals mentioned gets emitted. As a consequence, Qt doesn't notify its applications: https://bugreports.qt.io/browse/QTBUG-103093 => I fail to reproduce the bug, so I can only assume that it a local configuration issue (e.g. Plasma only installation). => OTOH I can't find the spot in the KDE documentaiton, where it is defined how to reliably subscribe to changes of color scheme, widget style and the like. Questions: a) In which cases are the mentioned DBus emitted or not? b) Could you point me at the respective spot in the KDE documentation? Thanks and brgds axel
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