title: QT: Launch default exporer on a directory selecting a file
body: <p>My application displays a grid of images. When the right mouse button is clicked a context menu is displayed where the first option is "Show in Explorer".</p>
  
  <p>I was able to launch the default explorer on the directory by using:</p>
  
  <pre><code>QDesktopServices::openUrl(QUrl::fromLocalFile( directory ));
  </code></pre>
  
  <p>However I want also the file to be selected.</p>
  
  <p>Is this possible? I suppose it should be, as many apps can do that.</p>