How to change QLineEdit border color only?

[Barry Scott]

My goal is to change the border color of QLineEdit based on the value of a property "valid".

I have added this style:

QLineEdit[valid=false] {border: 1px solid red}

And when I set the property "valid" to false and do the unpolish(), polish() dance I see the red border.

But the border radius is changed as is the padding.

How do I only change the border color and leave the padding and border radius at the default value?

I have considered finding the values of the border radius and padding, but did not find an API call that will return this information.

[SGaist]

Hi,

Currently you can't. Setting a style sheet will modify which Style is used to render a widget. You'll have to modify you style sheet to also alter the border radius.

[VRonin]

I was thinking that maybe you could just reimplement paintEvent() and override the pen used to draw the frame.

Have a look at the source of QLineEdit, it shouldn't be impossible

[Barry Scott]

And I take it that I cannot get the default radius in any way?