mutter-performance-source/tests/test-multistage.c

#include <clutter/clutter.h>

static gint n_stages = 1;

static gboolean
tex_button_cb (ClutterActor    *actor,
               ClutterEvent    *event,
               gpointer         data)
{
  clutter_actor_hide (actor);
}

static gboolean
on_button_press (ClutterActor *actor,
                 ClutterEvent *event,
                 gpointer      data)
{
  ClutterActor *new_stage;
  ClutterActor *label, *tex;
  gint width, height;
  gchar *stage_label, *win_title;
  ClutterColor color = { 0xdd, 0x33, 0xdd, 0xff };
  ClutterColor white = { 0x99, 0x99, 0x99, 0xff };
  ClutterTimeline  *timeline;
  ClutterAlpha     *alpha;
  ClutterBehaviour *r_behave;

  new_stage = clutter_stage_new ();
  if (!new_stage)
    return FALSE;

  /* FIXME: below should really be automatic */
  /* clutter_stage_ensure_cogl_context (CLUTTER_STAGE(new_stage)); */

  clutter_stage_set_color (CLUTTER_STAGE (new_stage), &color);
  clutter_actor_set_size (new_stage, 320, 240);

  tex = clutter_texture_new_from_file ("redhand.png", NULL);

  if (!tex)
    g_error ("pixbuf load failed");

  clutter_actor_set_reactive (tex, TRUE);
  g_signal_connect (tex, "button-press-event", 
                    G_CALLBACK (tex_button_cb), NULL);

  clutter_container_add_actor (CLUTTER_CONTAINER (new_stage), tex);

  stage_label = g_strdup_printf ("<b>Stage: %d</b>", ++n_stages); 
  label = clutter_label_new_with_text ("Mono 12", stage_label);

  clutter_label_set_color (CLUTTER_LABEL (label), &white);
  clutter_label_set_use_markup (CLUTTER_LABEL (label), TRUE);
  width = (clutter_actor_get_width (new_stage) 
           - clutter_actor_get_width (label)) / 2;
  height = (clutter_actor_get_height (new_stage) 
            - clutter_actor_get_height (label)) / 2;
  clutter_actor_set_position (label, width, height);
  clutter_container_add_actor (CLUTTER_CONTAINER (new_stage), label);
  clutter_actor_show (label);
  g_free (stage_label);

  /*
  g_signal_connect (new_stage, "button-press-event",
                    G_CALLBACK (clutter_actor_destroy),
                    NULL);
  */

  win_title =   g_strdup_printf ("Stage:%p", new_stage);
  clutter_stage_set_title (CLUTTER_STAGE(new_stage), win_title);

  timeline = clutter_timeline_new_for_duration (2000);
  g_object_set (timeline, "loop", TRUE, NULL);  

  alpha = clutter_alpha_new_full (timeline,
                                  CLUTTER_ALPHA_RAMP_INC,
                                  NULL, NULL);

  r_behave = clutter_behaviour_rotate_new (alpha,
					   CLUTTER_Y_AXIS,
					   CLUTTER_ROTATE_CW,
					   0.0, 360.0); 

  clutter_behaviour_rotate_set_center (CLUTTER_BEHAVIOUR_ROTATE (r_behave),
                                       clutter_actor_get_width (label)/2, 
                                       0, 
                                       0);
  
  clutter_behaviour_apply (r_behave, label);
  clutter_timeline_start (timeline);

  clutter_actor_show_all (new_stage);

  return TRUE;
}

int
main (int argc, char *argv[])
{
  ClutterActor *stage_default;
  ClutterActor *label;
  gint width, height;
  gchar *win_title;

  clutter_init (&argc, &argv);
  
  stage_default = clutter_stage_get_default ();
  g_signal_connect (stage_default, "button-press-event",
                    G_CALLBACK (on_button_press),
                    NULL);

  label = clutter_label_new_with_text ("Mono 16", "Default stage");
  width = (clutter_actor_get_width (stage_default) 
           - clutter_actor_get_width (label))
             / 2;
  height = (clutter_actor_get_height (stage_default) 
            - clutter_actor_get_height (label))
            / 2;
  clutter_actor_set_position (label, width, height);
  clutter_container_add_actor (CLUTTER_CONTAINER (stage_default), label);
  clutter_actor_show (label);

  win_title =   g_strdup_printf ("Stage:%p", stage_default);
  clutter_stage_set_title (CLUTTER_STAGE(stage_default), win_title);

  clutter_actor_show (stage_default);

  clutter_main ();

  return 0;
}