How to reset a stylesheet to default?

[homerun4711]

Hello!

I use a stylesheet to draw a red border around QLineEdits if the QValidator fails. So far this works fine. But I could not figure out how to reset the stylesheet to the default one. The style is returned to its default on a valid input, but not if the field is emptied.

I read somewhere that one could use

lineEdit->setStyleSheet(styleSheet());

lineEdit->setStyleSheet(styleSheet());

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but this does not work...

Do you know how I can fix this?

Kind regards,
HomeR