gtk:check-button-group (object)

object -- a gtk:check-button widget
group -- a gtk:check-button widget

The accessor for the group slot of the gtk:check-button class Adds the check button to the group of group. In a group of multiple check buttons, only one button can be active at a time.

Setting the group of a check button also changes the CSS name of the indicator widget's CSS node to radio. The behavior of a check button in a group is also commonly known as a "radio button".

Note that the same effect can be achieved via the gtk:actionable API, by using the same action with parameter type and "s" state type for all buttons in the group, and giving each button its own target value.