static final String COMET_SERVER_URL = GWT.getModuleBaseURL() + "server";

  private int counter = 0;

  private PreGameServiceAsync preGame = GWT.create(PreGameService.class);

  private Label lblPlayers[];

  private CometClient client;

  private Label lblHeader;

  /**

   * This constructor needs the game room name to send it to server and query the current players list and then update the labels list.

   * It also calls startCometSession method.

   * @param gameName

   */

  public NewWaitingRoom(String gameName) {

    this();

    lblHeader.setText(gameName);

    preGame.getPlayerList(gameName, new AsyncCallback<String[]>() {

      @Override

      public void onFailure(Throwable caught) {

        // TODO Auto-generated method stub

      }

      @Override

      public void onSuccess(String[] result) {

        /* It is guaranteed that the last name is the player name itself

         * it's not necessary to add it now, because its going to be added

         * later by cometClient onMessage Method.

         */

        for (int i = 0; i < (result.length-1); i++) {

            addPlayerToList(result[i]);

        }

      }

    });

    startCometSession();

  }

 

  /**

   * @wbp.parser.constructor

   */

  public NewWaitingRoom() {

    lblPlayers = new Label[6];

   

    VerticalPanel verticalPanel = new VerticalPanel();

    verticalPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);

    initWidget(verticalPanel);

    verticalPanel.setSize("1024px", "768px");

   

    AbsolutePanel absolutePanel = new AbsolutePanel();

    verticalPanel.add(absolutePanel);

    absolutePanel.setSize("500px", "480px");

   

    lblHeader = new Label("New label");

    absolutePanel.add(lblHeader, 10, 10);

    lblHeader.setSize("480px", "30px");

   

    TextArea taGameDescription = new TextArea();

    taGameDescription.setReadOnly(true);

    absolutePanel.add(taGameDescription, 200, 46);

    taGameDescription.setSize("278px", "272px");

   

    Button btnPronto = new Button("New button");

    btnPronto.addClickHandler(new ClickHandler() {

      public void onClick(ClickEvent event) {

        //ASK TO START GAME

        preGame.readyStartGame(new AsyncCallback <Void>(){

          @Override

          public void onFailure(Throwable caught) {

            // TODO Auto-generated method stub

           

          }

          @Override

          public void onSuccess(Void result) {

            System.out.println("\tSucesso em pedir para come�ar o jogo");

          }

         

        });

      }

    });

    btnPronto.setText("Pronto");

    absolutePanel.add(btnPronto, 346, 331);

    btnPronto.setSize("132px", "24px");

   

    Button btnSair = new Button("New button");

    btnSair.addClickHandler(new ClickHandler() {

      public void onClick(ClickEvent event) {

        //NOT YET IMPLEMENTED

      }

    });

    btnSair.setText("Sair");

    absolutePanel.add(btnSair, 346, 361);

    btnSair.setSize("132px", "24px");

   

    VerticalPanel verticalPanel_1 = new VerticalPanel();

    absolutePanel.add(verticalPanel_1, 10, 46);

    verticalPanel_1.setSize("184px", "188px");

   

    lblPlayers[0] = new Label("Open");

    lblPlayers[0].setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);

    verticalPanel_1.add(lblPlayers[0]);

    lblPlayers[0].setSize("180px", "20px");

   

     lblPlayers[1] = new Label("Open");

    lblPlayers[1].setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);

    verticalPanel_1.add(lblPlayers[1]);

    lblPlayers[1].setSize("180px", "20px");

   

     lblPlayers[2] = new Label("Open");

    lblPlayers[2].setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);

    verticalPanel_1.add(lblPlayers[2]);

    lblPlayers[2].setSize("180px", "20px");

   

     lblPlayers[3] = new Label("Open");

    lblPlayers[3].setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);

    verticalPanel_1.add(lblPlayers[3]);

    lblPlayers[3].setSize("180px", "20px");

   

     lblPlayers[4] = new Label("Open");

    lblPlayers[4].setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);

    verticalPanel_1.add(lblPlayers[4]);

    lblPlayers[4].setSize("180px", "20px");

   

     lblPlayers[5] = new Label("Open");

    lblPlayers[5].setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);

    verticalPanel_1.add(lblPlayers[5]);

    lblPlayers[5].setSize("180px", "20px");

   

    TextBox txtChatInput = new TextBox();

    txtChatInput.addKeyPressHandler(new KeyPressHandler() {

      public void onKeyPress(KeyPressEvent event) {

        if (event.getCharCode() == 13){

          System.out.println("PRESSIONOU ENTER!");

          client.stop();

        }

      }

    });

    absolutePanel.add(txtChatInput, 10, 443);

    txtChatInput.setSize("316px", "17px");

   

    TextArea taChatArea = new TextArea();

    taChatArea.setReadOnly(true);

    absolutePanel.add(taChatArea, 10, 331);

    taChatArea.setSize("324px", "94px");

  }

  /**

   * StartCometSession instantiates and starts a CometClient and its listener to receive messages from MyCometServlet.

   * Comet Listener onMessage method is used to automatically update the players list (labels) whenever a new player joins or leaves the game.

   * MyCometSerializer is used to allows user-defined GWT RPC serializable classes that extends the base Message class.

   */

  private void startCometSession() {

    CometListener listener = new CometListener() {

      public void onConnected(int heartbeat) {

        System.out.println("Cliente1: conectado");

      }

      public void onDisconnected() {

        System.out.println("Cliente1: desconectado");

      }

      public void onHeartbeat() {

        System.out.println("Cliente1: heartbeat");

      }

      public void onRefresh() {

        System.out.println("Cliente1: refresh");

      }

      public void onError(Throwable exception, boolean connected) {

        // warn the user of the connection error

        //exception.printStackTrace();

        System.out.println("Erro");

      }

      public void onMessage(List<? extends Serializable> messages) {

        System.out.println("Recebi uma mensagem:");

         for (Serializable message : messages) {

          System.out.println("\tMensagem: " + message);

          Message msg = (Message) message;

          MessageType type = msg.getMessageType();

          if (type == MessageType.CONNECT) {

            System.out.println("Adicionando Jogador:" + msg.getSenderName());

            addPlayerToList(msg.getSenderName());

          }

          else if (type == MessageType.DISCONNECT) {

          }

          else if (type == MessageType.START){

            start();

          }

        }

         System.out.println("Fim recebimento de mensagem (onMessage)\n");

      }

    };

    CometSerializer serializer = GWT.create(MyCometSerializer.class);

    client = new CometClient(COMET_SERVER_URL, serializer,

        listener);

    client.start();

  }

 

  //Add and Remove methods that updates on demand the player list.

 

  private void addPlayerToList(String playerName) {

    for (int i = 0; i < lblPlayers.length; i++) {

      if (lblPlayers[i].getText().equals("Open")) {

        lblPlayers[i].setText(playerName);

        counter++;

        return;

      }

    }

  }

  private void removePlayerOfList(String playerName) {

    for (int i = 0; i < lblPlayers.length; i++) {

      if (lblPlayers[i].getText().equals(playerName)) {

        lblPlayers[i].setText("Open");

        counter--;

        return;

      }

    }

  }

 

  private void start(){

    //System.out.println("CLIENTE: client.stop()");

    //client.stop();

    client.stop();

    preGame.stopCometServer(new AsyncCallback<Void>(){

      @Override

      public void onFailure(Throwable caught) {

        // TODO Auto-generated method stub

       

      }

      @Override

      public void onSuccess(Void result) {

        createTabuleiro();

      }

     

    });

  }

 

  private void createTabuleiro(){

    String[] players = new String[counter];

    for (int i = 0; i < counter; i++)

      players[i] = lblPlayers[i].getText();

   

    RootLayoutPanel.get().clear();

    RootLayoutPanel.get().add(new Game(players));

  }

}