cookbook: Looping animation examples

Added code examples for creating a looped animation with
each of the animation approaches (implicit, ClutterAnimation,
ClutterState).

doc/cookbook/examples/animations-looping-animator.c

@@ -0,0 +1,66 @@
+#include <stdlib.h>
+#include <clutter/clutter.h>
+
+static const ClutterColor stage_color = { 0x33, 0x33, 0x55, 0xff };
+static const ClutterColor red_color = { 0xff, 0x00, 0x00, 0xff };
+
+static gboolean
+key_pressed_cb (ClutterActor *actor,
+                ClutterEvent *event,
+                gpointer      user_data)
+{
+  ClutterTimeline *timeline = CLUTTER_TIMELINE (user_data);
+
+  if (!clutter_timeline_is_playing (timeline))
+    clutter_timeline_start (timeline);
+
+  return TRUE;
+}
+
+int
+main (int   argc,
+      char *argv[])
+{
+  ClutterActor *stage;
+  ClutterActor *actor;
+  ClutterTimeline *timeline;
+  ClutterAnimator *animator;
+
+  clutter_init (&argc, &argv);
+
+  stage = clutter_stage_get_default ();
+  clutter_actor_set_size (stage, 300, 200);
+  clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
+  g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
+
+  actor = clutter_rectangle_new_with_color (&red_color);
+  clutter_actor_set_size (actor, 100, 100);
+  clutter_actor_set_position (actor, 150, 50);
+
+  timeline = clutter_timeline_new (2000);
+  clutter_timeline_set_loop (timeline, TRUE);
+
+  animator = clutter_animator_new ();
+  clutter_animator_set_timeline (animator, timeline);
+
+  clutter_animator_set (animator,
+                        actor, "x", CLUTTER_LINEAR, 0.0, 150.0,
+                        actor, "x", CLUTTER_LINEAR, 0.5, 50.0,
+                        actor, "x", CLUTTER_LINEAR, 1.0, 150.0,
+                        NULL);
+
+  clutter_container_add_actor (CLUTTER_CONTAINER (stage), actor);
+
+  g_signal_connect (stage,
+                    "key-press-event",
+                    G_CALLBACK (key_pressed_cb),
+                    timeline);
+
+  clutter_actor_show (stage);
+
+  clutter_main ();
+
+  g_object_unref (animator);
+
+  return EXIT_SUCCESS;
+}