How to disable maximize button in QT?

Question

I want to disable maximize button in Qt

I tried

setWindowFlags( (windowFlags() | Qt::CustomizeWindowHint) & ~Qt::WindowMaximizeButtonHint); 

Answer 1

In ui-> setupUi (this);

setWindowFlags(Qt::Window | Qt::WindowMinimizeButtonHint | Qt::WindowCloseButtonHint);

Answer 2

SetWindowsFlags (); didn't work for me on Ubuntu 16.04, but under ui-> setupUi (this) I added this line:

setFixedSize(width(), height());

and it works great.