Qt: How do I handle the event of the user pressing the 'X' (close) button?

Question

I am developing an application using Qt. I don\'t know which slot corresponds to the event of \"the user clicking the \'X\'(close) button of the window frame\" i.e. this but

Answer 1

Well, I got it. One way is to override the QWidget::closeEvent(QCloseEvent *event) method in your class definition and add your code into that function. Example:

class foo : public QMainWindow
{
    Q_OBJECT
private:
    void closeEvent(QCloseEvent *bar);
    // ...
};


void foo::closeEvent(QCloseEvent *bar)
{
    // Do something
    bar->accept();
}