QMainWindow destructor

Question

Why the QMainWindow's destructor is not virtual? If I inherit a class MainWindow from QMainWindow and have some pointer attribute on it I can't delete the memory using MainWindow's destructor.

Answer 1

QMainWindow's destructor is an override of an already existing destructor (QWidget::~QWidget()) which in turn is an override of a virtual destructor (virtual QObject::~QObject()). Thus, QMainWindow::~QMainWindow() is virtual. The same rules apply as with normal member functions.

Answer 2

QObject's destructor has been declared as virtual. QMainWindow is derived from QObject indirectly. I belive QMainWindow's destruct does not need virtual in this case. Did you set breakpoint in QMainWindow's destructor while deleting your derived class?