Modified sprites not to take a sprite manager reference upon construction

but to have it set by the sprite manager when it is requested to manage
them.

Modified sprite manager to invalidate the view when sprites are added and
removed.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@295 542714f4-19e9-0310-aa3c-eee0fc999fb1

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

@@ -1,5 +1,5 @@
 //
-// $Id: SpriteManager.java,v 1.8 2001/08/21 00:58:36 mdb Exp $
+// $Id: SpriteManager.java,v 1.9 2001/08/21 19:40:30 mdb Exp $
 
 package com.threerings.media.sprite;
 
@@ -39,7 +39,12 @@ public class SpriteManager
      */
     public void addSprite (Sprite sprite)
     {
+        // let the sprite know about us
+        sprite.setSpriteManager(this);
+        // add the sprite to our list
         _sprites.add(sprite);
+        // and invalidate the sprite's original position
+        sprite.invalidate();
     }
 
     /**
@@ -50,7 +55,12 @@ public class SpriteManager
      */
     public void removeSprite (Sprite sprite)
     {
+        // invalidate the current sprite position
+        sprite.invalidate();
+        // remove the sprite from our list
         _sprites.remove(sprite);
+        // clear out our manager reference
+        sprite.setSpriteManager(null);
     }
 
     /**