Gtk.ListView with Vala and GTK4

GtkListViewExample.vala

// This example shows how to use the new Gtk.ListView in GTK4.

    // Example object, wraps a string inside a GObject
    class MyObject : Object {
        public string s;
        public MyObject(string s) {
            this.s = s;
        }
    }


    // Create model and fill with data
    var store = new GLib.ListStore(typeof(MyObject));
    store.append(new MyObject("bla1"));
    store.append(new MyObject("bla2"));
    store.append(new MyObject("bla3"));

    var selection_model = new Gtk.SingleSelection(store as GLib.ListModel);

    // ListItemFactory creates a pool of widgets and fills widgets with data when visible.
    // This implementation does not require us to write a dedicated class.
    var item_factory = new Gtk.SignalListItemFactory();
    item_factory.setup.connect((listitem) => {
        listitem.child = new Gtk.Label("MISSINGTEXT");
    });
    item_factory.bind.connect((listitem) => {
        (listitem.child as Gtk.Label).label = (listitem.item as MyObject).s;
    });
    
    // Create the main widget
    var view = new Gtk.ListView(selection_model, item_factory);