diff --git a/src/ui/events.c b/src/ui/events.c
index 7aa0252..3f84ffa 100644
--- a/src/ui/events.c
+++ b/src/ui/events.c
@@ -407,10 +407,19 @@ void ui_debug_model_loading (GtkWindow *self, const char *file)
  * Tree-related signals
  */
 
-void on_tree_expander_toggled(GtkExpander *expander, gpointer user_data)
+void on_tree_expander_toggled (GtkExpander *expander, gpointer user_data)
 {
     // This is a conceptual callback for when an expander is toggled
-    GtkTreeListRow *row = GTK_TREE_LIST_ROW(user_data);
+    if (gtk_widget_get_first_child (expander))
+      printf("[ui/events.on_tree_expander_toggled()]  %s  >  %s\n",\
+           gtk_expander_get_label (expander),\
+           gtk_widget_get_name (gtk_expander_get_label (gtk_widget_get_first_child (expander))));
+
+    GtkTreeListRow *row = GTK_TREE_LIST_ROW (user_data);
+
+    //  if (gtk_tree_list_row_is_expandable (row)) return; // TODO
+    //  if (gtk_tree_list_model_get_child_row (row, 0)) return; // TODO
+
     gboolean is_expanded = gtk_tree_list_row_get_expanded(row);
     gtk_tree_list_row_set_expanded(row, !is_expanded);
 }
diff --git a/src/ui/views.c b/src/ui/views.c
index ff5afaf..ea24ab5 100644
--- a/src/ui/views.c
+++ b/src/ui/views.c
@@ -174,8 +174,12 @@ char* ui_tree_create_model_func (GObject *item, gpointer root)
 void ui_create_tree (GtkWidget *target_widget)
 {
     assert(target_widget);
-    printf("in src/ui/views.ui_create_tree (GtkWidget *w) :  %s  >  %s  >  %s  >  %s\n",\
+    printf("[src/ui/views.ui_create_tree (GtkWidget *w)]  widgets hiercharchy :  %s  >  %s  >  %s  >  %s  >  %s  >  %s  >  %s  >  %s\n",\
            gtk_widget_get_name (GTK_WIDGET (gtk_widget_get_root (target_widget))),\
+           gtk_widget_get_name (gtk_widget_get_parent (gtk_widget_get_parent (gtk_widget_get_parent (gtk_widget_get_parent (gtk_widget_get_parent (target_widget)))))),\
+           gtk_widget_get_name (gtk_widget_get_parent (gtk_widget_get_parent (gtk_widget_get_parent (gtk_widget_get_parent (target_widget))))),\
+           gtk_widget_get_name (gtk_widget_get_parent (gtk_widget_get_parent (gtk_widget_get_parent (target_widget)))),\
+           gtk_widget_get_name (gtk_widget_get_parent (gtk_widget_get_parent (target_widget))),\
            gtk_widget_get_name (gtk_widget_get_parent (target_widget)),\
            gtk_widget_get_name (target_widget),\
            gtk_widget_get_name (gtk_widget_get_first_child (target_widget))