gtk4/org.gtkkn.bindings.gtk/ListBoxUpdateHeaderFunc

ListBoxUpdateHeaderFunc

typealias ListBoxUpdateHeaderFunc = (row: ListBoxRow, before: ListBoxRow?) -> Unit(source)

Whenever @row changes or which row is before @row changes this is called, which lets you update the header on @row.

You may remove or set a new one via method@Gtk.ListBoxRow.set_header or just change the state of the current header widget.

  • param row the row to update

  • param before the row before @row, or null if it is first