QObject method children returns empty list.

[Anticross]

I reimplement the QApplication's method notify to handle some key events. The task is to block all event handlers of it and make it i one place, but not for all QObjects. I mean I have some objects when I need to handle it by standard event handler. So there is the code:
@public: bool notify(QObject * obj, QEvent * event) {

const QMetaObject * objMeta = obj->metaObject();
QString clName = objMeta->className();

bool bProceed = false;
bool bisWidgetWindow = (obj->children().isEmpty() == false);

if (event->type() == QEvent::KeyPress) {     

 QKeyEvent * keyEvent = static_cast <QKeyEvent *>(event);
 
 if (bisWidgetWindow == false && obj->inherits("QTextEdit") == false)
  bProceed = onKeyPress(keyEvent);     

} else if (event->type() == QEvent::KeyRelease) {

 QKeyEvent * keyEvent = static_cast <QKeyEvent *>(event);
 
 if (bisWidgetWindow == false && obj->inherits("QTextEdit") == false)
  bProceed = onKeyRelease(keyEvent);
 
} else
 bProceed = true;    

if (bProceed)
 return QApplication::notify(obj, event);  

if (bisWidgetWindow)
 return QApplication::notify(obj, event); 

if (obj->inherits("QTextEdit"))
 return QApplication::notify(obj, event); 

return false;

}@
And the methods that handles keyEvent:
@private slots : bool onKeyPress(QKeyEvent * event) { // returns true if need to call standard event handler

     if (event->key() == Qt::Key_Space) {

   emit spaceBarPressed();
   return false;
  }

  return true;
 }

//--------------------------------------------------------------------------------------------------
private slots : bool onKeyRelease(QKeyEvent * event) { // returns true if need to call standard event handler

  if (event->key() == Qt::Key_Space) {

   emit spaceBarReleased();
   return false;
  }

  return true;
 }@

But I'm facing with the problem: @obj->children();@ always reterns empty list, even when this object has child objects. So now I replace this by: @obj->inherits("QWidgetWindow");@ . It works, but it wrong, cause I can have more then two-level parent-child relation.