Revamped sprite observation and added support for being notified if a path

is cancelled.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2504 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/sprite/PathObserver.java

@@ -0,0 +1,25 @@
+//
+// $Id: PathObserver.java,v 1.1 2003/04/30 00:44:36 mdb Exp $
+
+package com.threerings.media.sprite;
+
+import com.threerings.media.util.Path;
+
+/**
+ * An interface to be implemented by classes that would like to be
+ * notified when a sprite completes or cancels its path.
+ */
+public interface PathObserver
+{
+    /**
+     * Called when a sprite's path is cancelled either because a new path
+     * was started or the path was explicitly cancelled with {@link
+     * Sprite#cancelMove}.
+     */
+    public void pathCancelled (Sprite sprite, Path path);
+
+    /**
+     * Called when a sprite completes its traversal of a path.
+     */
+    public void pathCompleted (Sprite sprite, Path path, long when);
+}