diff --git a/src/main.c b/src/main.c
index da36c5e..8949a2e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -41,6 +41,7 @@ int main(int argc, char **argv)
 
     app = gem_graph_client_application_new("org.alec.gemgraph",
                                            G_APPLICATION_DEFAULT_FLAGS);
+    Hello();
 
     res = g_application_run(G_APPLICATION(app), argc, argv);
     return res;
diff --git a/src/ui/tree.c b/src/ui/tree.c
index 4636c08..5185f88 100644
--- a/src/ui/tree.c
+++ b/src/ui/tree.c
@@ -29,3 +29,51 @@
 #include "../../include/ui.h"
 
 
+enum
+{
+  COL_NAME = 0,
+  COL_AGE,
+  NUM_COLS
+} ;
+
+static GtkTreeModel *
+create_and_fill_model (void)
+{
+  GtkListStore *store = gtk_list_store_new (NUM_COLS,
+                                            G_TYPE_STRING,
+                                            G_TYPE_UINT);
+
+  /* Append a row and fill in some data */
+  GtkTreeIter iter;
+  gtk_list_store_append (store, &iter);
+  gtk_list_store_set (store, &iter,
+                      COL_NAME, "Heinz El-Mann",
+                      COL_AGE, 51,
+                      -1);
+
+  /* append another row and fill in some data */
+  gtk_list_store_append (store, &iter);
+  gtk_list_store_set (store, &iter,
+                      COL_NAME, "Jane Doe",
+                      COL_AGE, 23,
+                      -1);
+
+  /* ... and a third row */
+  gtk_list_store_append (store, &iter);
+  gtk_list_store_set (store, &iter,
+                      COL_NAME, "Joe Bungop",
+                      COL_AGE, 91,
+                      -1);
+
+  return GTK_TREE_MODEL (store);
+}
+
+void Hello(void)
+{
+    GtkWidget *view; //  = gtk_tree_view_new ();
+    printf("Hello, from src/ui/tree.c ! -------------------------\n");
+    return NULL;
+}
+
+
+