title: Wait for a signal with parameters in synchronously mode
body: <p>The following code works fine when I need to wait for a signal in sychronous mode. </p>
  
  <pre><code>    QEventLoop signalWaitLoop;
  
      connect(&amp;emmiter, SIGNAL(signalValue(quint8)), &amp;signalWaitLoop, SLOT(quit()));
  
      emmiter.sendSignal();
      signalWaitLoop.exec();
  </code></pre>
  
  <p>How can I nicely retrieve the emmited value <em>(quint8)</em> from the signal?</p>