diff --git a/src/ui/tree.c b/src/ui/tree.c
index 243c89c..c19a7a8 100644
--- a/src/ui/tree.c
+++ b/src/ui/tree.c
@@ -56,6 +56,37 @@ static GtkWidget *my_tree_view;
 static GListModel *my_list_model = NULL;
 
 
+//  view = gtk_list_view_new (model, factory);  <<<<<<
+
+typedef struct _GtkSignalListItemFactory GtkSignalListItemFactory;
+GtkListItemFactory *gtk_signal_list_item_factory_new (void);
+
+
+//  The “setup” signal is emitted when the factory needs to create a new row widget.
+//  g_signal_connect (factory, "setup", setup_listitem_cb, NULL);  <<<<<<
+//
+//  The “bind” signal is emitted when a row widget needs to be connected to an item from the model.
+//  g_signal_connect (factory, "bind", bind_listitem_cb, NULL);  <<<<<<
+//
+//  Both of these signals take a GtkListItem as argument,
+//  which is a wrapper object that lets you get at the model item (with gtk_list_item_get_item())
+//  and also lets you deliver the new row widget (with gtk_list_item_set_child()).
+//
+//  If your “bind” handler connects to signals on the item or does other things that require cleanup,
+//  you can use the “unbind” signal to do that cleanup. The “setup” signal has a similar counterpart called “teardown”.
+
+static void setup_listitem_cb (GtkListItemFactory *factory, GtkListItem *list_item)
+{
+  GtkWidget *label = gtk_label_new ("");
+  gtk_list_item_set_child (list_item, label);
+}
+
+//  user_function can be : setup, bind, unbind or teardown
+//  Parameters : self, The GtkSignalListItemFactory, listitem, The GtkListItem to bind,
+//               user_data : user data set when the signal handler was connected.
+//  Flags: Run First
+static void user_function (GtkSignalListItemFactory *self, GtkListItem *listitem, gpointer user_data) {}
+
 //------------------------------------------------------------------------------
 
 //  guix shell -m manifest.scm       make clean && clear && time make run