[ Version ( since = "2.18" ) ]
public void add_action_widget (Widget child, int response_id)
Add an activatable widget to the action area of a InfoBar, connecting a signal handler that will emit the response signal on the message area when the widget is activated.
The widget is appended to the end of the message areas action area.
| this |
a InfoBar |
| child |
an activatable widget |
| response_id |
response ID for |