Anyway, try this:
Qt Code: 
  1. #include <QtGui>
  2.  
  3.  
  4. class SignalTracker : public QObject {
  5.       int qt_metacall(QMetaObject::Call call, int id, void **args) {
  6.       id = QObject::qt_metacall(call, id, args);
  7.       if(id==-1 || call != QMetaObject::InvokeMetaMethod)
  8.         return id;
  9.         if(!m_slots.contains(id)) return -1;
  10.         Signal sig = m_slots.value(id);
  11.         qDebug() << "Object:" << sig.source->objectName() << "signal:" << sig.signal;
  12.         return -1;
  13.       }
  14. public:
  15.     SignalTracker(QObject *parent = 0) : QObject(parent) {
  16.       m_slotId = 0;
  17.     }
  18.     bool connectSignal(QObject *obj, const char *signal) {
  19.       QByteArray theSignal = QMetaObject::normalizedSignature(signal);
  20.       int signalId = obj->metaObject()->indexOfSignal(theSignal);
  21.       if(signalId == -1) {
  22.         return false;
  23.       }
  24.       m_slots[++m_slotId] = Signal(obj, theSignal);
  25.       QMetaObject::connect(obj, signalId, this, QObject::metaObject()->methodCount()+m_slotId);
  26.       return true;
  27.     }
  28. private:
  29.     int m_slotId;
  30.     struct Signal {
  31.       QObject *source;
  32.       QByteArray signal;
  33.       Signal(QObject *src, const QByteArray &ba) : source(src), signal(ba){}
  34.       Signal() : source(0){}
  35.     };
  36.     QHash<int,Signal> m_slots;
  37. };
  38.  
  39. int main(int argc, char **argv){
  40.   QApplication app(argc, argv);
  41.   SignalTracker tracker;
  42.   QPushButton button("Click me");
  43.   button.setObjectName("some button");
  44.   tracker.connectSignal(&button, "clicked()");
  45.   button.show();
  47.   le.setObjectName("some line edit");
  48.   tracker.connectSignal(&le, "textChanged(const QString &)");
  49.   le.show();
  50.   return app.exec();
  51. };
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