Which event when raising a window

[Caius Aérobus]

Hello,
I have 2 main windows and I would like that each time one of them is raised by the user - by clicking on it - the other one be raised so as to always have all windows either visible or not, ie not hidden by another application (otherwise I have to raise each window individually).
I was about to solve it by overloading the changeEvent() method but this method is not called when a window is raised by clicking on it. Any idea?

void
myClass::changeEvent(QEvent *event)
{
  if (event->type() == QEvent::WindowStateChange) {
    if (this->windowState() & Qt::WindowActive) {
      printf("raised\n");
    }
    QWidget::changeEvent(event);
  }
}

void
myClass::changeEvent(QEvent *event)
{
  if (event->type() == QEvent::WindowStateChange) {
    if (this->windowState() & Qt::WindowActive) {
      printf("raised\n");
    }
    QWidget::changeEvent(event);
  }
}

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