title: How to pause and restart the Qtimer on QT
body: <p>I have a Ubuntu , and i'am working with IDE <code>QT</code> on <code>C++</code> . 
  I will to pause and resume the Qtimer , for exampe : </p>
  
  <pre><code>void Ordonnancer_les_taches::on_pushButton_clicked()
  {
  
      connect(&amp;dataTimer, SIGNAL(timeout()), this, SLOT(l_odonnancement()));
      dataTimer.start(5000);
  }
  </code></pre>
  
  <p>How to <code>Pause</code> and how <code>Restart</code> ? 
  give me an exmple </p>