A choice from multiple check buttons. A single radio button performs the same basic function as a GtkCheckButton , as it's position in the object hierarchy reflects. It is only when multiple radio buttons are grouped together that they become a different user interface component in their own right.
Every radio button is a member of some group of radio buttons.
When one is selected, all other radio buttons in the same group are deselected. A GtkRadioButton is one way of giving the user a choice from many options. In subsequent calls, the group you wish to add this button to should be passed as an argument. To be of any practical value, a widget should then be packed into the radio button. Retrieves the group assigned to a radio button.