Tab size of QTabBar in QMdiArea

Question

My QMainWindow is using QMdiArea. The viewMode of the QMdiArea is set to TabbedView. The Tab size of MdiArea takes entire width of the MdiArea:

If more tabs are added, they divide MdiArea width and consume entire width:

I understand that the MdiArea in tabbedView uses QTabBar, but I'm not able to find a way to set MdiArea's TabBar setExpanding property to false.

Any clue (Qt, PyQt or PySide) will be helpful.

Answer 1

The tab-bar of a QMdiArea can be accessed, but there's currently no public API for it. A work-around is to first ensure the view-mode is set to TabbedView, and then use findChild to get the QTabBar object. It will then be possible to change the expanding property of the tab-bar:

mdiArea.setViewMode(QMdiArea.TabbedView)
tabs = mdiArea.findChild(QTabBar)
tabs.setExpanding(False)