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 package cz.xelfi.quoridor.visidor;

 import cz.xelfi.quoridor.Board;

 import cz.xelfi.quoridor.Move;

 import java.awt.GridLayout;

 import java.util.List;

 import java.util.concurrent.CopyOnWriteArrayList;

 import javax.swing.JPanel;

 /** JavaBean class that displays and can manipulate with Quoridor {@link Board}.

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 public final class BoardPane extends JPanel {

     private final Viewer viewer;

     private final List<BoardListener> listeners = new CopyOnWriteArrayList<BoardListener>();

     public BoardPane() {

         setLayout(new GridLayout(1,1));

         viewer = new Viewer();

         viewer.moveListener(this);

         add(viewer);

     }

     public final void setBoard(Board b) {

         viewer.setBoard(b);

     }

     public final Board getBoard() {

         return viewer.getBoard();

     }

     /** The board can either be in <q>view only</q> mode when showing state 

      * of the {@link Board} during opponent's move, or it can be editable.

      * In editable mode, one shall listen on changes delivered to 

      * BoardListener.

      * 

      * @param editable read only or editable mode?

      */

     public final void setEditable(boolean editable) {

         viewer.enableListeners(editable);

     }

     public final void addBoardListener(BoardListener l) {

         listeners.add(l);

     }

     public final void removeBoardListener(BoardListener l) {

         listeners.remove(l);

     }

     final void moveHappened(Move m) {

         BoardEvent ev = null;

         for (BoardListener bl : listeners) {

             if (ev == null) {

                 ev = new BoardEvent(this, m);

             }

             bl.boardChanged(ev);

         }

     }

 }