Problem:

Selecting an item from GTK ListView widget.
Related issue https://discourse.gnome.org/t/gtk4-listview-why-does-the-single-click-activate-also-trigger-the-selected-event/7947

Solution:

// let list_view: gtk::ListView;
if let Some(model) = list_view.model() {
    model.connect_selection_changed(move |selection_model, _, _| { // listen for selection change
        let single_selection_model =
            match selection_model.downcast_ref::<gtk::SingleSelection>() { // down cast to your model of choice(eg: single selection model)
                Some(ss) => ss,
                None => return,
            };

        let list_item = single_selection_model.selected_item();
        let pos = single_selection_model.selected();
    });
}