QApplication::activeWindow always returns '0' on Mac

[dpatel]

I have an application on which I show configuration panel (QFrame) to setup the configuration. Now I want to implement functionality where I close the configuration panel if the user clicks anywhere else on my application, but if the user clicks anywhere outside the application, it should not close the application.

Currently I have the following code which works fine on Win 7 but has issues on Mac.

void ConfigurationPanel::changeEvent ( QEvent * event) 
  {
  if(event->type() == QEvent::ActivationChange)
  {
      if(!isActiveWindow())
      {
          if(QApplication::activeWindow())
          {
              close();
          }
      }
  }
}

void ConfigurationPanel::changeEvent ( QEvent * event) 
  {
  if(event->type() == QEvent::ActivationChange)
  {
      if(!isActiveWindow())
      {
          if(QApplication::activeWindow())
          {
              close();
          }
      }
  }
}

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On windows QApplication::activeWindows() returns non-zero value if we click anywhere on the application (but outside configuration panel) and zero value if I click on any other application which is what is expected. But on Mac I always get zero value from QApplication::activeWindow() no matter where I click.

Can anyone tell me how can I fix this issue?

Thanks