problem with GtkListStore

[<chenjun1 egr msu edu>]

Hi, dear all,

I plan to show a list inside a scrolled window. Everything is OK except
that the content of every row in the list is not shown. If I click the
row, it will turn color into blue. But I just can't see the content.

What's wrong? Below is part of the code related to list. Attached is the
whold .c files.

thanks & br

Jun

	GtkListStore *list_store;
	GtkWidget *tree;
 	GtkTreeIter iter;
	list_store = gtk_list_store_new (1, G_TYPE_STRING);
	gtk_tree_view_set_model(GTK_TREE_VIEW(tree), GTK_TREE_MODEL(list_store));
	gtk_list_store_append (list_store, &iter);
	gtk_list_store_set(list_store, &iter, 0, "Foo", -1);
	gtk_list_store_append (list_store, &iter);
	gtk_list_store_set(list_store, &iter, 0, "Foo", -1);
	gtk_list_store_append (list_store, &iter);
	gtk_list_store_set(list_store, &iter, 0, "Foo", -1);
	
	tree = gtk_tree_view_new();	
	GtkCellRenderer *renderer;
	GtkTreeViewColumn *column;
	renderer = gtk_cell_renderer_text_new();
    	column = gtk_tree_view_column_new_with_attributes("Name", renderer,NULL);
	gtk_tree_view_append_column(GTK_TREE_VIEW(tree), column);
	gtk_container_add (GTK_CONTAINER (scrolled_window2), tree);
	gtk_widget_show (tree);

scrollview.c