This variant of add_radio_actions adds a
DestroyNotify callback for user_data.
| this |
the action group |
| entries |
an array of radio action descriptions |
| value |
the value of the action to activate initially, or -1 if no action should be activated |
| on_change |
the callback to connect to the changed signal |
| destroy |
destroy notification callback for |
| n_entries |
the number of entries |
| user_data |
data to pass to the action callbacks |