public class CenterBox : Widget, Accessible, Buildable, ConstraintTarget, Orientable
`GtkCenterBox` arranges three children in a row, keeping the middle child centered as well as possible.
![An example GtkCenterBox](centerbox.png)
To add children to `GtkCenterBox`, use [method@Gtk.CenterBox.set_start_widget], [method@Gtk.CenterBox.set_center_widget] and [ method@Gtk.CenterBox.set_end_widget].
The sizing and positioning of children can be influenced with the align and expand properties of the children.
GtkCenterBox as GtkBuildable
The `GtkCenterBox` implementation of the `GtkBuildable` interface supports placing children in the 3 positions by specifying “start”, “center” or “end” as the “type” attribute of a <child> element.
`GtkCenterBox` uses a single CSS node with the name “box”,
The first child of the `GtkCenterBox` will be allocated depending on the text direction, i.e. in left-to-right layouts it will be allocated on the left and in right-to-left layouts on the right.
In vertical orientation, the nodes of the children are arranged from top to bottom.
`GtkCenterBox` uses the gtk_accessible_role_group role.