#include <clutter/clutter.h>

static void
new_frame_cb (ClutterTimeline *timeline,
              gint             frame_num,
              ClutterText     *text)
{
  gchar *string = g_strdup_printf ("Progress = %lf",
                                   clutter_timeline_get_progress (timeline));
  clutter_text_set_text (text, string);
  g_free (string);
}

static gboolean
update_string (gpointer *array)
{
  new_frame_cb (array[0], 0, array[1]);
  g_free (array);
  return FALSE;
}

static void
completed_cb (ClutterTimeline *timeline,
              ClutterText     *text)
{
  gpointer *array = g_malloc (sizeof (gpointer) * 2);

  array[0] = timeline;
  array[1] = text;

  g_idle_add ((GSourceFunc)update_string, array);
}

int
main (int argc, char **argv)
{
  ClutterActor *stage, *label;
  ClutterTimeline *timeline;

  clutter_init (&argc, &argv);

  stage = clutter_stage_get_default ();

  label = clutter_text_new ();

  clutter_container_add_actor (CLUTTER_CONTAINER (stage), label);

  timeline = clutter_timeline_new (1000);
  g_signal_connect (timeline, "new-frame",
                    G_CALLBACK (new_frame_cb), label);
  g_signal_connect (timeline, "completed",
                    G_CALLBACK (completed_cb), label);

  clutter_timeline_start (timeline);

  clutter_actor_show (stage);

  clutter_main ();

  return 0;
}