Unsolved After using my Qt desktop application for a while and also using other applications simultaneously the stylesheet of my Qt desktop application changes.
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I am using Qt 5.15.3 on Windows 10 and Widgets (no QML).
At startup my application loads a light theme stylesheet file (style.qss).
I also set the stylesheet of some QWidgets programatically.
When I start my program everything looks like I want it.
But after a while using my application and other programs simultaneously the stylesheets changes.As an example I have a QTabWidget with rounded tabs:
After a while it looks like this instead:
As another example I have made a subclass of QPushButton: StartStopButton.
I am modifying the stylesheet of the button dynamically.
For instance when starting I want the button to appear green:setStyleSheet("StartStopButton{color: #000000; background-color: #00ff00}");
However when the stylesheet changes the button is instead shown as light blue when starting:
I have installed a global eventFilter on qApp and uses this to get the stylesheet of my button when starting.
It reports:StartStopButton{color: #000000; background-color: #00ff00}
So it seems that my button has the stylesheet I wanted but Qt somehow chooses to ignore this stylesheet!?
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@andyP said in After using my Qt desktop application for a while and also using other applications simultaneously the stylesheet of my Qt desktop application changes.:
But after a while using my application and other programs simultaneously the stylesheets changes.
I don't think anyone can diagnose this.
However when the stylesheet changes the button is instead shown as light blue when starting:
If you replace the first stylesheet rule by the second one you will lose the first stylesheet's green foreground/background, if that is what you mean. Then the light blue presumably comes from some other applicable rule you have.