How to close all windows in C++ and QT?

Question

Qt

Good afternoon!
There is a main window in QtCreator: MainWindow
I need that: if the main window was closed, then all the others would be closed.

Side windows are created with:
label->show();
Thanks for the reply!

Answer 1

Make a signal in MainWindow::onWindowClosed and call it in MainWindow::closeEvent(QCloseEvent *event)
Connect the signal to all separate windows in hide() or close()