title: How to use QPen with QpainterPath?
body: <p>I have a code like:</p>
  
  <pre><code>     QPainterPath groupPath;
       QPen pen; // new
  
       pen.setCosmetic(1); // new
  
       groupPath.setPen(pen); // error (error: class "QPainterPath" has no member "setPen")
       groupPath.moveTo(60.0, 40.0);
       groupPath.arcTo(40.0, 35.0, 40.0, 10.0, 180.0, 180.0);
       groupPath.moveTo(40.0, 40.0);
       groupPath.lineTo(40.0, 80.0);
       groupPath.arcTo(40.0, 75.0, 40.0, 10.0, 0.0, 180.0);
       groupPath.lineTo(80.0, 80.0);
       groupPath.lineTo(80.0, 40.0);
       groupPath.closeSubpath();
  </code></pre>
  
  <p>How can I use setPen to use Cosmetic in my code?</p>