Hello, does anyone know a quick way to have the indicator subcontrol of a QGroupBox appear as a radio button instead of a checkbox?

I would like the solution to work for all styles (e.g. using a stylesheet to provide a radio button image would not work as I would have to provide a different image depending on whether the application was using windows style, mac style etc.)

I assume that I'm going to have to reimplement the paint event for the subcontrol, but was wondering if there is a simpler way?

Thanks