title: How to get the list of image files only in a folder
body: <p>I want to get the names of image files (*.png, *.jpg, *.bmp) from a folder. </p>
  
  <p>What I could do so far is this :</p>
  
  <pre><code> fileInfoList = dir.entryInfoList(QDir::Files|QDir::NoDotAndDotDot);
  </code></pre>
  
  <p>But how to get only the *.png, *.bmp and *.jpg files ?</p>