title: Customize style in QtQuick
body: <p>I'm working with Qt5.7, QtQuick2.7 and QtQuick.Controls 2.0.
  I wanted to custom my progressBar but the property "style" is not accepted.</p>
  
  <p>If has already fixed a similar problem with same versions..</p>
  
  <p><a href="https://i.stack.imgur.com/doeOg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/doeOg.png" alt="enter image description here"></a></p>
  
  <p>Thanks a lot!</p>