un micro commit intermédiaire

hot.c

@@ -91,6 +91,12 @@ static void add_child_node (struct TreeNode_t *parent, struct TreeNode_t *child)
 }
 
 void create_experimental_tree (GtkBox *experimental_box){
+    struct TreeNode_t *tree_root = create_tree_node("hello");
+    struct TreeNode_t *child = create_tree_node("it's me");
+    add_child_node(tree_root, child);
+
+    GtkStringList *model = gtk_string_list_new(NULL);
+    gtk_string_list_append (model, tree_root->text);
     GtkSignalListItemFactory *factory = GTK_SIGNAL_LIST_ITEM_FACTORY (gtk_signal_list_item_factory_new ());
     g_signal_connect (factory, "setup", G_CALLBACK(on_experimental_tree_setup_factory), NULL);
     g_signal_connect (factory, "bind", G_CALLBACK(on_experimental_tree_bind_factory), NULL);
@@ -101,10 +107,16 @@ void create_experimental_tree (GtkBox *experimental_box){
   g_signal_connect (hello, "activate", G_CALLBACK (on_experimental_expander_toggled), hello);
   gtk_box_append (experimental_box, GTK_WIDGET (hello));
 
-  GtkExpander *it_s_me = GTK_EXPANDER (gtk_expander_new ("it's me !"));
+    GtkTreeListModel *tree_model = gtk_tree_list_model_new(
-  gtk_expander_set_expanded (GTK_EXPANDER (it_s_me), FALSE);
+        G_LIST_MODEL (model),
-  gtk_widget_set_margin_start(GTK_WIDGET (it_s_me), 20);
+        FALSE, // Passthrough - False in actual usage with dynamic children retrieval
-  g_signal_connect (it_s_me, "activate", G_CALLBACK (on_experimental_expander_toggled), it_s_me);
+        FALSE, // autoexpand
-  gtk_box_append (experimental_box, GTK_WIDGET (it_s_me));
+        (GtkTreeListModelCreateModelFunc)ui_experimental_tree_create_model_func,
+        tree_root,
+        NULL // (GDestroyNotify) free_tree_node
+    );
+    GtkSingleSelection *selection_model = gtk_single_selection_new (G_LIST_MODEL (tree_model));
+    gtk_single_selection_set_autoselect (selection_model, FALSE);
+    gtk_single_selection_set_can_unselect (selection_model, TRUE);
 }