A toolbar toggle button of which only one in the group may be active.
GObject
`-- GtkObject
`-- GtkWidget
`-- GtkContainer
`-- GtkBin
`-- GtkToolItem
`-- GtkToolButton
`-- GtkToggleToolButton
`-- GtkRadioToolButton
A toolbar button that can be in one of two states; on and off. Only one button in the group may be on/active.
--GtkRadioToolButton::new_from_stock (string stock_id);--GtkRadioToolButton::new_from_widget (GtkRadioToolButton group);--GtkRadioToolButton::new_with_stock_from_widget (GtkRadioToolButton group, string stock_id);--
get_group() Returns the button group. set_group() Sets the tool button acting as group leader.