static void tree_v_cursor_changed_cb (GtkWidget *widget, gpointer data);
static void tree_v_move_cursor_cb (GtkWidget *widget, GtkMovementStep arg1,
gint arg2, gpointer data);
static void tree_v_cursor_changed_cb (GtkWidget *widget, gpointer data);
static void tree_v_move_cursor_cb (GtkWidget *widget, GtkMovementStep arg1,
gint arg2, gpointer data);