gtk.custom_layout.CustomLayout uses closures for size negotiation.
A GtkCustomLayout uses closures matching to the old gtk.widget.Widget virtual functions for size negotiation, as a convenience API to ease the porting towards the corresponding `GtkLayoutManager virtual functions.
gtk.custom_layout.CustomLayout uses closures for size negotiation.
A GtkCustomLayout uses closures matching to the old gtk.widget.Widget virtual functions for size negotiation, as a convenience API to ease the porting towards the corresponding `GtkLayoutManager virtual functions.