Weird widgets that you don&#x27;t normally see Cocoa OSX apps, like toolbars or non-standard file pickers. The worst offenders are those tabbed form widgets with the pill buttons: <a href="http:&#x2F;&#x2F;doc.qt.io&#x2F;qt-5&#x2F;qtwidgets-index.html#styles" rel="nofollow">http:&#x2F;&#x2F;doc.qt.io&#x2F;qt-5&#x2F;qtwidgets-index.html#styles</a>