How to make QMainWindiow title , frame etc visible?

Anonymous_Banned275

Addendum

This may better illustrate current state - in all "sub windows" the frame, title .etc. is missing ...

I cannot see my last post - so here is a new copy.

I am replacing custom class "console" ( access to serial port) with QMDIArea.
I had to start with plain MainWindiow....and then I added QMDiArea. I will add the original "console " as MDI subwindow...

It works as expected , but I cannot actually see the added QMainWindow derived frame , title, etc - the common components of QMainWindow.

I can add menu bar item , status bar text ... but cannot add window title
What did I do wrong?
(Please - I am asking for solution / suggestions to resolve this ...)

I have not tried to resize the window...

PS
How do I add customary "ICON bar " to the QMainWindow?

   // orignal code
    // setCentralWidget(m_console);
    // add plain window
     setCentralWidget(MainWindow_MDI_Area_MainWindow); // (new

Christian Ehrlicher

@AnneRanch said in How to make QMainWindiow title , frame etc visible?:

I cannot see my last post - so here is a new copy.

https://forum.qt.io/topic/144407/