diff --git a/src/ui/tree.c b/src/ui/tree.c
index c19a7a8..d423e28 100644
--- a/src/ui/tree.c
+++ b/src/ui/tree.c
@@ -56,17 +56,67 @@ static GtkWidget *my_tree_view;
 static GListModel *my_list_model = NULL;
 
 
-//  view = gtk_list_view_new (model, factory);  <<<<<<
+//  erreur: un élément de l'initialisation n'est pas une constante
+//model = create_application_list ();
+
+
+
+typedef struct _GtkModel GtkModel;
+GtkModel my_model();
 
 typedef struct _GtkSignalListItemFactory GtkSignalListItemFactory;
+GtkSignalListItemFactory my_factory(int a);
+
 GtkListItemFactory *gtk_signal_list_item_factory_new (void);
+GtkListItemFactory *gtk_list_view_get_factory (GtkListView *self);
+GtkWidget *gtk_list_view_new (GtkSelectionModel *my_model, GtkListItemFactory *my_factory);
 
 
+static void setup_listitem_cb (GtkListItemFactory *factory, GtkListItem *list_item)
+{
+  GtkWidget *label = gtk_label_new ("");
+  gtk_list_item_set_child (list_item, label);
+
+  GtkWidget *image = gtk_image_new ();
+  gtk_image_set_icon_size (GTK_IMAGE (image), GTK_ICON_SIZE_LARGE);
+  gtk_list_item_set_child (list_item, image);
+}
+
+static void bind_listitem_cb (GtkListItemFactory *factory, GtkListItem *list_item)
+{
+  GtkWidget *image;
+  GAppInfo *app_info;
+
+  image = gtk_list_item_get_child (list_item);
+  app_info = gtk_list_item_get_item (list_item);
+  gtk_image_set_from_gicon (GTK_IMAGE (image), g_app_info_get_icon (app_info));
+}
+
+static void activate_cb (GtkListView  *list, guint position, gpointer unused)
+{
+  GAppInfo *app_info;
+
+  app_info = g_list_model_get_item (G_LIST_MODEL (gtk_list_view_get_model (list)), position);
+  g_app_info_launch (app_info, NULL, NULL, NULL);
+  g_object_unref (app_info);
+}
+
+
+
+
+//  Parameters : self      : the GtkSignalListItemFactory,
+//               listitem  : the GtkListItem to bind,
+//               user_data : the user data set when the signal handler was connected.
+//  Flags: Run First
+static void any_user_function (GtkSignalListItemFactory *self, GtkListItem *listitem, gpointer user_data) {}
+
+//  user_function can be : setup, bind, unbind or teardown
+//
 //  The “setup” signal is emitted when the factory needs to create a new row widget.
-//  g_signal_connect (factory, "setup", setup_listitem_cb, NULL);  <<<<<<
+//  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);  <<<<<<
+//  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())
@@ -75,17 +125,6 @@ GtkListItemFactory *gtk_signal_list_item_factory_new (void);
 //  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) {}
 
 //------------------------------------------------------------------------------
 
@@ -96,8 +135,11 @@ static void user_function (GtkSignalListItemFactory *self, GtkListItem *listitem
 // https://gnome.pages.gitlab.gnome.org/libsoup/gio/GListModel.html
 // https://blog.gtk.org/2020/09/05/a-primer-on-gtklistview/  <<<  Factory mechanism
 // https://docs.gtk.org/gtk4/class.ListItemFactory.html  <<<
+// https://www.typeerror.org/docs/gtk~4.0/gtksignallistitemfactory
+// https://developer-old.gnome.org/gtk4/stable/GtkListView.html  <<<  copy that !
 // https://docs.gtk.org/gtk4/class.ListItem.html
 // https://docs.gtk.org/gtk4/ctor.TreeListModel.new.html ***
 // https://blog.gtk.org/2020/06/08/more-on-lists-in-gtk-4/ ***
 // https://gitlab.gnome.org/GNOME/gtk/-/blob/main/demos/gtk-demo/listview_settings.c   GtkBuilder *builder;  (line 216)
 // https://discourse.gnome.org/t/how-can-i-get-the-expanded-collapsed-items-in-the-new-gtktreelistmodel-implementation/16824
+// https://developer-old.gnome.org/gtk4/stable/GtkSignalListItemFactory.html