Disable QDialogs default close button (upper left "cross button")?

Question

Is it possible to disable/delete the QDialogs default close button at the upper left of the dialog?

Answer 1

At least in (embedded) Linux, you can do this:

setWindowFlags(Qt::Window | Qt::WindowTitleHint | Qt::CustomizeWindowHint);

With that, I get a window which has the title but no buttons.

Answer 2

Clearing WindowCloseButtonHint in WindowFlags may do what you want. Check out the example here.