Hi Hugues,
Thank you for writing.
In this case the only the visual state of the element is changed by the theme. As you can see the
ToggleStateChanged event is not fired unless the radio button is clicked. So to avoid this you can use
RadHostItem and add
RadRadioButton:
I hope this helps. Should you have any other questions do not hesitate to ask.
Regards,
Dimitar
Telerik