Make it easier for drop puzzles to implement their own fancy drop logic

if they've got that burning need to do something out of the ordinary.


git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@371 c613c5cb-e716-0410-b11b-feb51c14d237

src/java/com/threerings/puzzle/drop/server/DropManagerDelegate.java

@@ -106,7 +106,7 @@ public abstract class DropManagerDelegate extends PuzzleManagerDelegate
         // create the piece dropper if appropriate
         PieceDropLogic pdl = getPieceDropLogic();
         if (pdl != null) {
-            _dropper = new PieceDropper(pdl);
+            _dropper = getPieceDropper(pdl);
         }
     }
 
@@ -132,14 +132,22 @@ public abstract class DropManagerDelegate extends PuzzleManagerDelegate
     }
 
     /**
-     * Returns the piece drop logic used to drop any pieces that need
-     * dropping in the board.
+     * Returns the piece drop logic used to drop any pieces that need dropping in the board.
      */
     protected PieceDropLogic getPieceDropLogic ()
     {
         return null;
     }
 
+    /**
+     * Returns the piece dropper used to drop any pieces that need dropping in the board.  
+     */
+    protected PieceDropper getPieceDropper (PieceDropLogic logic)
+    {
+        return new PieceDropper(logic);
+    }
+
+
     /**
      * This method should be called by derived classes whenever the player
      * successfully places a drop block.