How to automatically maximize a subWindw in a QMdiArea

[Audetto]

I can do it this way:

• call QMdiArea::addSubWindow
• and then QMdiSubWindow::showMaximized

But one can see a flicker due to the 2 operations not being atomic.

None of the Qt::WindowFlags seems to help.

I am using Qt 6.4.2 on Ubuntu 24.04.

[JonB]

@Audetto
https://www.qtcentre.org/threads/41101-QMdiArea-and-adding-sub-window

try using setWindowState(Qt::WindowMaximized) on the sub window instance it self :
m_mdiArea->addSubWindow(Editor)->setWindowState(Qt::WindowMaximized) ;

That worked in Qt in 2006, so I imagine it's the same two decades later...? :)