[Interest] Probable Qt bug in widgets display

Etienne Sandré-Chardonnal etienne.sandre at m4x.org
Wed Apr 20 10:56:08 CEST 2016

Here are two screenshots:

Normal display : http://www.eclat-digital.com/downloads/qtbug-normal.png
Bugged display : http://www.eclat-digital.com/downloads/qtbug-issue.png

It seems this also happens with windows RDP sessions.



2016-04-19 14:20 GMT+02:00 Etienne Sandré-Chardonnal <etienne.sandre at m4x.org

> Dear all,
> I have what seems to be a Qt bug in a desktop application. I'm using Qt
> 5.4.1 under windows, compiled with minGW.
> My application is based on a QMainWindow with toolboxes, status bar, and a
> tabbed central area. I use the Fusion style, redefined all the palette with
> QApplication::setPalette for having a dark theme, and customized a few
> widgets with stylesheets. All this customization is done once in main() on
> the QApplication instance.
> The interface is displayed as it should 99% of the time.
> But sometimes, I think when exiting from the screen saver, some GUI zones
> are rendered white instead of dark gray. These are:
>  - the empty spaces in QTabBar (central widget and stacked toolboxes)
>  - The status bar
>  - Bottom docked toolbox
> The status bar is not customized with QSS.
> As this had been observed only on my windows 7 development machine, I
> initially thought of a bug on my system related to messed up GPU drivers.
> But has also been reported by my customers now, under windows 10, on a
> clean system.
> Actual question : Is this already identified as a bug? I could not find a
> related entry in the bug tracker but this is not easy to find
> I will try getting a screenshot of the issue along with the equivalent
> "normal" display
> Thanks in advance,
> Etienne
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