https://doc.qt.io/qt-6.8/qheaderview.html
QHeaderView Class | Qt Widgets 6.8.7
The QHeaderView class provides a header row or header column for item views.
classqtwidgets
https://forum.qt.io/topic/68941/css-qtableview-qheaderview-font-weight-ignored
CSS + QTableView/QHeaderView: font-weight ignored? | Qt Forum
Jul 4, 2016 - Hi all, As the title says... When selecting a table row the default behaviour is to set the vertical and horizontal header(s) to bold. My attempt was to forc...
cssfontweightignoredqt