Added Path.wasRemoved(), call it in the Sprite code.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2178 542714f4-19e9-0310-aa3c-eee0fc999fb1

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

@@ -1,5 +1,5 @@
 //
-// $Id: Sprite.java,v 1.59 2003/01/17 03:50:10 mdb Exp $
+// $Id: Sprite.java,v 1.60 2003/01/17 22:57:08 mdb Exp $
 
 package com.threerings.media.sprite;
 
@@ -215,6 +215,11 @@ public abstract class Sprite extends AbstractMedia
      */
     public void move (Path path)
     {
+        // if there's a previous path, let it know that it's going away
+        if (_path != null) {
+            _path.wasRemoved(this);
+        }
+
         // save off this path
         _path = path;
 
@@ -230,7 +235,10 @@ public abstract class Sprite extends AbstractMedia
 	// TODO: make sure we come to a stop on a full coordinate,
 	// even in the case where we aborted a path mid-traversal.
 
-        _path = null;
+        if (_path != null) {
+            _path.wasRemoved(this);
+            _path = null;
+        }
     }
 
     /**
@@ -257,6 +265,8 @@ public abstract class Sprite extends AbstractMedia
     {
         // keep a reference to the path just completed
         Path oldpath = _path;
+        // let the path know that it's audi
+        _path.wasRemoved(this);
         // clear out the path we've now finished
 	_path = null;
         // inform observers that we've finished our path

src/java/com/threerings/media/util/BobblePath.java

@@ -1,5 +1,5 @@
 //
-// $Id: BobblePath.java,v 1.2 2003/01/14 22:37:38 ray Exp $
+// $Id: BobblePath.java,v 1.3 2003/01/17 22:57:08 mdb Exp $
 
 package com.threerings.media.util;
 
@@ -131,6 +131,12 @@ public class BobblePath implements Path
         gfx.drawRect(_sx - _dx, _sy - _dy, _dx * 2, _dy * 2);
     }
 
+    // documentation inherited from interface
+    public void wasRemoved (Pathable pable)
+    {
+        // nothing doing
+    }
+
     /**
      * Update the position of the pathable or return false
      * if it's already there.

src/java/com/threerings/media/util/LineSegmentPath.java

@@ -1,5 +1,5 @@
 //
-// $Id: LineSegmentPath.java,v 1.26 2002/12/04 02:45:09 shaper Exp $
+// $Id: LineSegmentPath.java,v 1.27 2003/01/17 22:57:08 mdb Exp $
 
 package com.threerings.media.util;
 
@@ -227,6 +227,12 @@ public class LineSegmentPath
         _nodestamp += timeDelta;
     }
 
+    // documentation inherited from interface
+    public void wasRemoved (Pathable pable)
+    {
+        // nothing doing
+    }
+
     /**
      * Place the pathable moving along the path at the end of the previous
      * path node, face it appropriately for the next node, and start it on

src/java/com/threerings/media/util/Path.java

@@ -1,5 +1,5 @@
 //
-// $Id: Path.java,v 1.9 2002/12/02 20:11:24 mdb Exp $
+// $Id: Path.java,v 1.10 2003/01/17 22:57:08 mdb Exp $
 
 package com.threerings.media.util;
 
@@ -53,4 +53,12 @@ public interface Path
      * Paint this path on the screen (used for debugging purposes only).
      */
     public void paint (Graphics2D gfx);
+
+    /**
+     * When a path is removed from a pathable, whether that is because the
+     * path was completed or because it was replaced by another path, this
+     * method will be called to let the path know that it is no longer
+     * associated with this pathable.
+     */
+    public void wasRemoved (Pathable pable);
 }

src/java/com/threerings/media/util/TimedPath.java

@@ -1,5 +1,5 @@
 //
-// $Id: TimedPath.java,v 1.2 2002/12/02 20:11:24 mdb Exp $
+// $Id: TimedPath.java,v 1.3 2003/01/17 22:57:08 mdb Exp $
 
 package com.threerings.media.util;
 
@@ -44,6 +44,12 @@ public abstract class TimedPath implements Path
         _startStamp += timeDelta;
     }
 
+    // documentation inherited from interface
+    public void wasRemoved (Pathable pable)
+    {
+        // nothing doing
+    }
+
     /**
      * Generates a string representation of this instance.
      */