Qt Designer (creator) widget box like widget
<p>Is there a good example or complete code for Qt Designer (creator) widget box like widget with QWidget or QFrame within? So it should work like QToolBox or QTabWidget but be expandable: possible to view few pages (widgets) at a time, not single one like QToolBox or QTabWidget or QStackedWidget provide.</p>

<p><a href="https://i.stack.imgur.com/HgSGe.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HgSGe.png" alt="enter image description here"></a></p>

<p>Or need to write myself using QTreeWidget for example? Need same look and feel with same root decoration on category button (or panel) in in Qt Creator or with line like following:</p>

<pre><code>+ ——- Category 1 ————
widgets
widgets
+ ——- Category 2 ————
widgets
widgets
etc
</code></pre>

<p>If it exists with plugin to Qt Creator - even better.</p>