How to use url in QT style sheets

[bemlun]

Hi, I don't understand how to use url in QT style sheets.
This is the style sheet for a Radio Button.

QRadioButton::indicator {
    width: 18px;
    height: 18px;
}
QRadioButton::indicator::unchecked {
    image: url(':/../images/radio_button_off.png');
}

And this is the directory where my project is. The dialog with the radio buttons is visualizza_bene_2.ui and I'm using QT designer to modify style sheet. The icons are in images

The problem is that the icon doesn't appear. How to solve it?
Thank you all

[JonB]

@bemlun
I don't use Qt Designer and/or these "embedded" resources syntax. But why the /.. at the start? Plus, I don't think you can .. out from /, that's not allowed.

While you wait for a better answer, what about url(':/images/radio_button_off.png'); or even url('images/radio_button_off.png');? Have a play!

[bemlun]

The second one works! Thank you very much

[JonB]

@bemlun
I must warn you, and I would be most grateful if a Qt expert commented here.

When you use url('images...') you are accessing the file in the images folder. When you (try to) use url(':/images...'), or something like that : syntax, I think you are accessing a resource embedded in your app. (For example, we use something like QtGui.QPixmap(":/icons/icons/...").) This distinction could be very significant for deployment. You should seek clarification of which one you should be using, it's not my area.

[bemlun]

@JonB said in How to use url in QT style sheets:
Thanks again, unfortunately image:url('images/radio_button_off.png'); works when I see the preview, but doesn't work when I lunch the project (it's a QGIS Plugin). I definitely need clarification.

[mrjj]

@bemlun
Hi
Your syntax indicates you are using an resource file
( the ":/" )
However, the project seems not to contain one.

please see here
https://doc.qt.io/qtforpython/overviews/resources.html

I normally recommend using a resource file for icons. But since its python im not sure it has the same benefits :)