Added support for using sprites that are fixed in relation to a

potentially scrolling view. Also added a means for non-sprites and
animations to hear about view scrolls.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3209 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/ViewTracker.java

@@ -0,0 +1,18 @@
+//
+// $Id: ViewTracker.java,v 1.1 2004/11/11 23:52:43 mdb Exp $
+
+package com.threerings.media;
+
+/**
+ * An interface used by entities that wish to respond to the scrolling of a
+ * {@link VirtualMediaPanel}.
+ *
+ * @see VirtualMediaPanel#addViewTracker
+ */
+public interface ViewTracker
+{
+    /**
+     * Called by a {@link VirtualMediaPanel} when it scrolls.
+     */
+    public void viewLocationDidChange (int dx, int dy);
+}