title: Customize QToolBar extension button
body: <p>Good morning, or good afternoon :)</p>
  
  <p>I am trying to custom a QToolBar.
  I managed to custom the buttons of my toolbar, but I can't find a way to set the expansion button to the two default arrows... </p>
  
  <p>Here is an illustration to help you understand : 
  <a href="https://i.stack.imgur.com/tpoiq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tpoiq.png" alt="enter image description here"></a></p>
  
  <p>On this toolbar, you can see a double arrow at the end of the second toolbar but none at the end of the first tool bar (after Variable)... I would like to set the qt_toolbar_ext_button to the image at this path :/images/images/extension-arrows.png.</p>
  
  <p>The code I used to custom them is :</p>
  
  <pre><code>m_toolbar1-&gt;setStyleSheet(
      "QToolBar {border-bottom: 1px solid #808d97;"
      "border-top: 1px solid #808d97; background-color: #3a4f5e;} "
  
      "QToolButton {background:#3a4f5e; border: 1px solid #585858;"
      "border-style: outset; border-radius: 4px; min-width: 5em; min-height: 1.5em; color: white}"
  
      "QToolButton:hover {background: #5d7180; border: 1px groove #293843;}"
  
      "QToolButton:pressed {background:#475864; border: 1px groove #293843;}"
      "QToolButton#qt_toolbar_ext_button {"
          "border: none;"
          "background: url(:/images/images/extension-arrows.png);"
          "padding-top: 20;"
          "width: 20px;"
          "font: bold 14px;"
          "color: red;}");
  
  m_toolbar2-&gt;setStyleSheet("background-color: #3a4f5e; color:white;");
  </code></pre>
  
  <p>This code was inspired by : <a href="https://stackoverflow.com/questions/8385309/how-to-set-the-qtoolbuttons-icons-using-style-sheet?rq=1">How to set the QToolButton&#39;s icons using style sheet?</a></p>
  
  <p>Thank you in advance for your help ! :D</p>