diff --git a/src/main.c b/src/main.c
index 8e0a417..8254e07 100644
--- a/src/main.c
+++ b/src/main.c
@@ -32,6 +32,16 @@
 
 int main(int argc, char **argv)
 {
+    GtkWidget *window;
+    GtkWidget *view;
+    gtk_init();
+    // window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+    // g_signal_connect(window, "delete_event", gtk_main_quit, NULL); /* dirty */
+    g_signal_connect(window, "delete_event", NULL, NULL); /* dirty */
+    // view = create_view_and_model();
+    // gtk_container_add(GTK_CONTAINER(window), view);
+    // gtk_widget_show_all(window);
+    // gtk_main();
 
     tree_c_test();
 
diff --git a/src/ui/application.c b/src/ui/application.c
index 6312982..5ca6a05 100644
--- a/src/ui/application.c
+++ b/src/ui/application.c
@@ -135,6 +135,8 @@ static void gem_graph_client_application_class_init(
     app_class->activate = gem_graph_client_application_activate;
 }
 
+
+
 GemGraphClientApplication *gem_graph_client_application_new(
                                                     const char *application_id,
                                                     GApplicationFlags flags)
diff --git a/src/ui/tree.c b/src/ui/tree.c
index 3c93c5f..7fe5d1b 100644
--- a/src/ui/tree.c
+++ b/src/ui/tree.c
@@ -162,23 +162,37 @@ tree_c_test(void)
     }
     else g_error("Oops, we should have a first row in the tree store!\n");
 
+    GtkTreeViewColumn   *col;
+    GtkCellRenderer     *renderer;
+    GtkWidget           *view;
+    GtkTreeModel        *model;
+
+    GtkWidget *window;
+
+
     tree_c_printing_test();
 }
 
 static void tree_c_printing_test(void)
 {
     printf("tree_c_printing_test() \
----------------------------------------------------------\n\n\
-(https://en.wikibooks.org/wiki/GTK (modulo) 2B_By_Example/Tree_View/Tree_Models)\n\
-(https://en.wikibooks.org/wiki/GTK (modulo) 2B_By_Example/Tree_View/Columns_and_Renderer)\n\n\
-cf. tuto : gtk_list_store_new (2, G_TYPE_STRING, G_TYPE_UINT);  - (cf. line 69)\n\
-           creates a new list store with two columns.\n\n\
-           gtk_tree_store_new(1, G_TYPE_STRING);  - (cf. line 108)\n\
-           creates a new tree store with one column.\n\n\
-Now : how to display in our window (/panel) what was stored in these models ?.\n\
-                (see the commented code at the end)\n");
+------------------------------------------------------------------\n\
+(https://en.wikibooks.org/wiki/GTK (modulo) 2B_By_Example/Tree_View/Columns_and_Renderer)\n\
+Trying to adapt the first example of this tuto to display a simple tree view in our window.\n\
+Can't use :\n\
+   - gtk_init(&argc, &argv);\n\
+   - window = gtk_tree_view_new(GTK_WINDOW_TOPLEVEL);\n\
+   - g_signal_connect(window, 'delete_event', gtk_main_quit, NULL);\n\
+   - tree_c_test(); (or : create_view_and_model() or some equivalent tree description)\n\
+   - gtk_container_add(GTK_CONTAINER(window), view);\n\
+   - gtk_widget_show_all(window);\n\
+   - gtk_main();\n\
+(see main.c lines 35-44)\n\
+");
 }
 
+//  https://en.wikibooks.org/wiki/GTK%2B_By_Example/Tree_View/Tree_Models
+
 /*
 https://stackoverflow.com/questions/51002454/how-to-list-all-the-rows-of-a-gtk-treeview