cookbook: Added example for animation reuse recipe

Added an example showing how to reuse a ClutterAnimator instance to animate multiple actors at different times using an animatable rig, combined with reparenting.
2010-08-31 17:42:37 +01:00
parent 209bef6f8a
commit acc28cf60c
3 changed files with 243 additions and 0 deletions
--- a/doc/cookbook/examples/animations-reuse.c
+++ b/doc/cookbook/examples/animations-reuse.c
@ -0,0 +1,117 @@
+#include <stdlib.h>
+#include <clutter/clutter.h>
+
+gboolean
+foo_button_pressed_cb (ClutterActor *actor,
+                       ClutterEvent *event,
+                       gpointer      user_data)
+{
+  ClutterScript *script = CLUTTER_SCRIPT (user_data);
+
+  ClutterAnimator *bounce;
+  ClutterActor *rig;
+  ClutterTimeline *bounce_timeline;
+
+  clutter_script_get_objects (script,
+                              "bounce_timeline", &bounce_timeline,
+                              "rig", &rig,
+                              "bounce", &bounce,
+                              NULL);
+
+  /* don't allow animation to be reused until it is complete */
+  if (clutter_timeline_is_playing (bounce_timeline))
+    return TRUE;
+
+  clutter_actor_set_position (rig, 0, 0);
+
+  clutter_actor_set_scale (rig, 1.0, 1.0);
+
+  clutter_actor_reparent (actor, rig);
+
+  clutter_animator_start (bounce);
+
+  return TRUE;
+}
+
+/* set the actor's position to the rig's position
+ * but parented to the background;
+ * remove the click handler so the rectangle can't be animated again
+ */
+static void
+_move_to_background_cb (ClutterActor *actor,
+                        gpointer      user_data)
+{
+  ClutterActor *background = CLUTTER_ACTOR (user_data);
+
+  gfloat x, y;
+  clutter_actor_get_position (clutter_actor_get_parent (actor), &x, &y);
+
+  gdouble scale_x, scale_y;
+  clutter_actor_get_scale (clutter_actor_get_parent (actor), &scale_x, &scale_y);
+
+  clutter_actor_reparent (actor, background);
+
+  clutter_actor_set_position (actor, x, y);
+  clutter_actor_set_scale (actor, scale_x, scale_y);
+
+  g_signal_handlers_disconnect_matched (actor,
+                                        G_SIGNAL_MATCH_FUNC,
+                                        0,
+                                        0,
+                                        NULL,
+                                        foo_button_pressed_cb,
+                                        NULL);
+}
+
+void
+foo_rig_animation_complete_cb (ClutterTimeline *timeline,
+                               gpointer         user_data)
+{
+  ClutterScript *script = CLUTTER_SCRIPT (user_data);
+
+  ClutterContainer *rig;
+  ClutterActor *background;
+
+  clutter_script_get_objects (script,
+                              "rig", &rig,
+                              "background", &background,
+                              NULL);
+
+  clutter_container_foreach (rig,
+                             CLUTTER_CALLBACK (_move_to_background_cb),
+                             background);
+}
+
+int
+main (int argc, char *argv[])
+{
+  clutter_init (&argc, &argv);
+
+  gchar *filename = "animations-reuse.json";
+  GError *error = NULL;
+
+  ClutterScript *script = clutter_script_new ();
+  clutter_script_load_from_file (script, filename, &error);
+
+  if (error != NULL)
+    {
+      g_critical ("Error loading ClutterScript file %s\n%s", filename, error->message);
+      g_error_free (error);
+      exit (EXIT_FAILURE);
+    }
+
+  clutter_script_connect_signals (script, script);
+
+  ClutterActor *stage;
+  clutter_script_get_objects (script,
+                              "stage", &stage,
+                              NULL);
+
+  clutter_actor_show (stage);
+
+  clutter_main ();
+
+  g_object_unref (script);
+
+  return EXIT_SUCCESS;
+}