Is there a way to pair 2 top level windows?

Hi all,

I'm new to Qt programming so please bare with me. I'm currently working with some code that has 2 top level windows open simultaneously (lets name them window 1 and window 2). The control flow of the software design demands that window 1 acts as a pseudo parent to window 2 and therefore window 2 should close every time window 1 is closed. However, the opposite will not be true. Since both windows are independent of each other, is there a way of achieving this or am I banging my head against a wall here?

Note: Unfortunately making window a child widget to window one is not possible due to the way the code has already been developed.

Thanks in advance.

You can make use of signals and slots.
Just inform one another about the events you are interested in and decide upon the action

Thanks for the response. What signal should I be using to determine if the X (close) button on window 1 has been clicked?

Install an event filter to detect QEvent::Close, e.g.

Code:

---

#include <QtGui>
 
class EventSignaller : public QObject
{
 Q_OBJECT
 
 signals:
  void closing();
 
 protected:
  bool eventFilter(QObject *object, QEvent *event)
  {
    if(event->type() == QEvent::Close)
      emit(closing());
 
    return QObject::eventFilter(object, event);
  }
};
 
int main(int argc, char *argv[])
{
  QApplication app(argc, argv);
 
  QWidget w1;
  w1.setWindowTitle("w1");
  w1.show();
 
  QWidget w2;
  w2.setWindowTitle("w2");
  w2.show();
 
  EventSignaller s;
  w1.installEventFilter(&s);
  w2.connect(&s, SIGNAL(closing()), SLOT(close()));
 
  return app.exec();
}
 
#include "main.moc"

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