addConstraint

Adds a constraint to the layout manager.

The property@Gtk.Constraint:source and property@Gtk.Constraint:target properties of constraint can be:

• set to NULL to indicate that the constraint refers to the widget using layout

• set to the class@Gtk.Widget using layout

• set to a child of the class@Gtk.Widget using layout

• set to a class@Gtk.ConstraintGuide that is part of layout

The @layout acquires the ownership of @constraint after calling this function.

Parameters