Qt 5.11: Passing mouse events to QtQuick from a transparent overlay window

Following on from the previous post... I need to forward events from the transparent window to my Qt Quick Widget. I am currently using the following:

bool TransparentWidget::event(QEvent *event)
{
  switch (event->type())
  {
    case QEvent::MouseButtonPress:
    case QEvent::MouseButtonRelease:
    case QEvent::MouseButtonDblClick:
    case QEvent::MouseMove:
      // QMouseEvent
      event->ignore();
      event->setAccepted(false);
      ((MyQuickWidget*)parentWidget())->event(event);
      ((MyQuickWidget*)parentWidget())->setEnabled(true);
      break;

    default:
      break;
  }
  return QWidget::event(event);
}

This works but the positions are relative to the transparent window. Not sure if this is going to be a problem but if it is than I can use mapToParent and create a new mouse event.