Make Qt application not to quit when last window is closed

Question

I've created a Qt application that acts mostly as a daemon, but occasionally shows a dialog.

Now, I know the default behavior is to close the application when the last window closes, but for my program, I need it to continue running. How do I change the behavior of my application?

Answer 1

You can set the QApplication::quitOnLastWindowClosed property to false:

...
QApplication qApp;
qApp.setQuitOnLastWindowClosed(false);
...