rjvbb added a comment.
If you read https://bugreports.qt.io/browse/QTBUG-63792?focusedCommentId=381570 the take-home message seems to be that the platform theme plugin (and KDE in general) shouldn't be messing with setStyleName() at all UNLESS asking for a font with properties that cannot be represented in the old Panose system. Such fonts should probably be rare and a priori mostly encountered in very specific applications (Krita, Karbon and the like). REPOSITORY R135 Integration for Qt applications in Plasma REVISION DETAIL https://phabricator.kde.org/D9070 To: rjvbb, #frameworks, davidedmundson, graesslin, cfeck Cc: ngraham, cfeck, fvogt, plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart