QWidget container / Promote a widget without using Creator or Designer

[wysota]

You are missing a layout on some level, most probably your VBoxLayout's parent widget is not placed in a layout.

I have no idea why does the title of this thread refer to promoting widgets, though.

[Gavin Harper]

The reason I used the terminology of promoting widgets is that that is what I did to obtain the same result in Creator.

Create a widget on the form -> promote widget -> include header + class name and it then appeared on the main window.

Thank you for your suggestion regarding adding parent widget. I will try that now!

[wysota]

The reason I used the terminology of promoting widgets is that that is what I did to obtain the same result in Creator.

From what I understand you just want to use a custom widget. But it has nothing to do with your problem. You'd be having the same problem if you wanted to use QPushButton or any of the other widget classes. Your C++ code is simply incorrect.

[Gavin Harper]

Solved.

I was adding my layout to a QWidget and doing widget->show(); instead of setCentralWidget(widget);