<![CDATA[QComboBox returns incorrect rect on Mac]]>I am doing some custom painting inside a QComboBox. I call QComboBox::rect() to get the area to paint into inside paintEvent() in my derived class. This works fine on Windows. But is incorrect on Mac.

What I want:

0_1555067656190_2019-04-12_12-11-21.png
What I get painting inside QComboBox::rect():

0_1555067663931_2019-04-12_12-12-33.png
The QRect returned is 30 pixels high, but the actual QComboBox is only 20 pixels high. I can adjust the QRect by a few pixels to get the correct area, but I am worried this fudge won't work on all versions of macOS (past and present). Is there a reliable way get the QRect?

I use a QItemDelegate to paint the customized drop-down menu for the QComboBox and that works fine (QStyleOptionViewItem::rect is correct). But there doesn't seem to be way to use the delegate to paint the unclicked state.

0_1555068032595_2019-04-12_12-19-15.png

Any ideas?

--
Andy Brice
http://www.hyperplan.com

]]>https://forum.qt.io/topic/101718/qcombobox-returns-incorrect-rect-on-macRSS for NodeSun, 03 May 2026 16:47:10 GMTFri, 12 Apr 2019 11:21:33 GMT60<![CDATA[Reply to QComboBox returns incorrect rect on Mac on Mon, 15 Apr 2019 21:40:02 GMT]]>Did you check with a more recent version ?

]]>https://forum.qt.io/post/523195https://forum.qt.io/post/523195Mon, 15 Apr 2019 21:40:02 GMT<![CDATA[Reply to QComboBox returns incorrect rect on Mac on Sun, 14 Apr 2019 21:50:27 GMT]]>@SGaist I am using Qt 5.12.0 on Mac.

]]>https://forum.qt.io/post/522995https://forum.qt.io/post/522995Sun, 14 Apr 2019 21:50:27 GMT<![CDATA[Reply to QComboBox returns incorrect rect on Mac on Fri, 12 Apr 2019 20:42:49 GMT]]>Hi,

What version of Qt are you using ?

]]>https://forum.qt.io/post/522823https://forum.qt.io/post/522823Fri, 12 Apr 2019 20:42:49 GMT<![CDATA[Reply to QComboBox returns incorrect rect on Mac on Fri, 12 Apr 2019 11:27:48 GMT]]>It might be related to high DPI. I am on a Mac Retina display.

--
Andy Brice
http://www.hyperplan.com

]]>https://forum.qt.io/post/522708https://forum.qt.io/post/522708Fri, 12 Apr 2019 11:27:48 GMT<![CDATA[Reply to QComboBox returns incorrect rect on Mac on Fri, 12 Apr 2019 11:25:35 GMT]]>@AndyBrice Just an idea: could it be related to High DPI scaling?

]]>https://forum.qt.io/post/522706https://forum.qt.io/post/522706Fri, 12 Apr 2019 11:25:35 GMT