How to toggle a window from fullscreen to normal mode programmatically?

Question

I am using this code to toggle a window from normal mode to fullscreen:

void MainWindow::on_action_Fullscreen_triggered()
{
    showFullScreen();
}

How to return back to normal mode when I trigger this action again?

Answer 1

After a minute session with Qt's reference:

void MainWindow::on_action_Fullscreen_triggered()
{
    isFullScreen() ? showNormal() : showFullScreen();
}