GtkSizeGroup
. In the future, the requisition
of the widget will be determined as the maximum of its requisition
and the requisition of the other widgets in the size group.
Whether this applies horizontally, vertically, or in both directions
depends on the mode of the size group. See gtkSizeGroupSetMode
.gtkSizeGroupAddWidget(object, widget)
object
widget
GtkWidget
to add