title: How to realize the slider with circular hollow handle in qt
body: <p>is there a way to implement the slide bar with a circular <strong>hollow handle</strong> in QT?</p>
  <p><a href="https://i.stack.imgur.com/7ojFm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7ojFm.png" alt="image" /></a></p>