title: QT - Show Widget without blocking his GUI
body: <p>I want to show a widget for displaying an animated loading gif while another function (<code>pthread</code>) computes a task.</p>
  
  <p>I have tried to subclass my widget with a <code>QThread</code> class, and implemented the method <code>run()</code> where I call the method <code>show()</code>. However, my widget GUI froze.</p>
  
  <p>How can I launch a widget where the GUI is processed separately?</p>