Added isManaged().

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2190 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/AbstractMediaManager.java

@@ -1,5 +1,5 @@
 //
-// $Id: AbstractMediaManager.java,v 1.6 2003/01/18 20:14:03 mdb Exp $
+// $Id: AbstractMediaManager.java,v 1.7 2003/01/18 22:25:30 mdb Exp $
 
 package com.threerings.media;
 
@@ -100,6 +100,15 @@ public abstract class AbstractMediaManager
         }
     }
 
+    /**
+     * Returns true if the specified media is being managed by this media
+     * manager.
+     */
+    public boolean isManaged (AbstractMedia media)
+    {
+        return _media.contains(media);
+    }
+
     /**
      * Calls {@link AbstractMedia#tick} on all media to give them a chance
      * to move about, change their look, generate dirty regions, and so