Dispatch a COMPLETE event when we finish loading media.

git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@679 ed5b42cb-e716-0410-a449-f6a68f950b19

src/as/com/threerings/flash/MediaContainer.as

@@ -78,6 +78,13 @@ import com.threerings.util.Util;
  */
 [Event(name="init", type="flash.events.Event")]
 
+/**
+ * Dispatched when we've shown new media.
+ *
+ * @eventType flash.events.Event.COMPLETE
+ */
+[Event(name="complete", type="flash.events.Event")]
+
 /**
  * Dispatched when we've unloaded our content... always. The LoaderInfo's UNLOAD event
  * is only dispatched if the INIT event has already been dispatched and not if you cancel a
@@ -231,7 +238,7 @@ public class MediaContainer extends Sprite
      */
     protected function didShowNewMedia () :void
     {
-        // nothing right now, but call super() you overriders.
+        dispatchEvent(new Event(Event.COMPLETE));
     }
 
     /**