title: QPushButton css pressed
body: <p>I need to change the background image of a <code>QPushButton</code> when its state is pressed. I tried with this css:</p>
  
  <pre><code>QPushButton { background: transparent; border: none;} 
  QPushButton:pressed { image: url(\mypath\settings_press.png); }
  </code></pre>
  
  <p>but a runtime I got the following error:</p>
  
  <blockquote>
    <p>Could not parse stylesheet of widget</p>
  </blockquote>
  
  <p>Any idea?</p>