<![CDATA[How to properly draw QComboBox's view?]]>I subclassed QComboBox and have overridden the paintEvent() of it, but when I filter the paintEvent of the view it's still drawing the default style.

  if(event->type() == QEvent::Paint && object == view()) {
    auto e = static_cast<QPaintEvent*>(event);
    auto painter = QPainter(view());
    painter.fillRect(e->rect(), Qt::black);
    painter.fillRect(1, 1, view()->width() - 2, view()->height() - 2,
      Qt::white);
    return true;
  }

With this code I expected to see a white view with a black border and no items in the list. But, I get the default view drawn with a black border on the bottom and right edges.

How to I prevent the view from being drawn? Shouldn't returning true from the filter prevent the default view style from being drawn?

]]>https://forum.qt.io/topic/96544/how-to-properly-draw-qcombobox-s-viewRSS for NodeSat, 11 Apr 2026 20:27:18 GMTMon, 12 Nov 2018 21:23:09 GMT60<![CDATA[Reply to How to properly draw QComboBox's view? on Mon, 12 Nov 2018 21:51:48 GMT]]>@mrjj

Thanks, I'll take a look.

]]>https://forum.qt.io/post/492734https://forum.qt.io/post/492734Mon, 12 Nov 2018 21:51:48 GMT<![CDATA[Reply to How to properly draw QComboBox's view? on Mon, 12 Nov 2018 21:50:40 GMT]]>@Qt_User72653
Ah, its plenty.
Well yes, a custom view should be more optimal then.
You can use
https://code.woboq.org/qt5/qtbase/src/widgets/itemviews/qlistview.cpp.html
to have a look of handling states etc.

]]>https://forum.qt.io/post/492733https://forum.qt.io/post/492733Mon, 12 Nov 2018 21:50:40 GMT<![CDATA[Reply to How to properly draw QComboBox's view? on Mon, 12 Nov 2018 21:45:58 GMT]]>@mrjj

  • New background color for hovered item
  • Padding for hovered item
  • Custom border color for top, with a different color for bottom and sides
  • Remove the outline for the hovered item
  • Custom size for list items

That's just off the top of my head, there's a few more things I'm forgetting. Some of this works with CSS, some works with quirks, and some I can't get to work at all, so, I figured I would just draw it myself rather than try to deal with the issues with CSS.

I originally considered making a custom view for it, but I didn't want to have to deal with managing items in the list; I only wanted a custom style.

]]>https://forum.qt.io/post/492732https://forum.qt.io/post/492732Mon, 12 Nov 2018 21:45:58 GMT<![CDATA[Reply to How to properly draw QComboBox's view? on Mon, 12 Nov 2018 21:39:11 GMT]]>@Qt_User72653
Hi
Can i ask what is the goal of it ?
other background color or completely new item drawing or ?

]]>https://forum.qt.io/post/492729https://forum.qt.io/post/492729Mon, 12 Nov 2018 21:39:11 GMT<![CDATA[Reply to How to properly draw QComboBox's view? on Mon, 12 Nov 2018 21:37:49 GMT]]>@SGaist

Thanks.

I was hoping to avoid having to create a new view for it, but if that's easier I'll give that a go.

]]>https://forum.qt.io/post/492728https://forum.qt.io/post/492728Mon, 12 Nov 2018 21:37:49 GMT<![CDATA[Reply to How to properly draw QComboBox's view? on Mon, 12 Nov 2018 21:30:43 GMT]]>Hi,

If you want as custom view, it would be simpler to create your own QAbstractItemView or QListView and call setView on your combo box.

]]>https://forum.qt.io/post/492725https://forum.qt.io/post/492725Mon, 12 Nov 2018 21:30:43 GMT