/** Handles the Join button. */
  private void doJoin() {
    if (mInProgress) return;

    mInProgress = true;

    // Store field values in preferences
    saveFieldValues();

    setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));

    MakeTableWindow maker = new MakeTableWindow(mOwner, mConnection, this);
    maker.joinTable(
        mInvite.getTableJID(),
        mNicknameField.getText(),
        new MakeTableWindow.TableWindowCallback() {
          public void fail() {
            mInProgress = false;
            setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
          }

          public void succeed(TableWindow win) {
            setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
            dispose();
          }
        });
  }
  /** Reads the default values from the preferences storage and fills in the text fields. */
  private void restoreFieldValues() {
    // Make a default nickname based on the user ID
    String defNick = mConnection.getUser();
    defNick = defNick.substring(0, defNick.indexOf('@'));

    Preferences prefs = Preferences.userNodeForPackage(getClass()).node(NODENAME);

    mNicknameField.setText(prefs.get(NICKNAME_KEY, defNick));
  }
  /** Create the window UI. */
  private void buildUI() {
    Container cPane = getContentPane();
    cPane.setLayout(new GridBagLayout());
    GridBagConstraints c;
    JLabel label;
    String msg;
    JTextField field;

    int row = 0;

    label = new JLabel(sTimeStampFormat.format(mInvite.getTimestamp()));
    label.setFont(new Font("SansSerif", Font.PLAIN, 9));
    c = new GridBagConstraints();
    c.gridx = 0;
    c.gridy = row++;
    c.gridwidth = GridBagConstraints.REMAINDER;
    c.anchor = GridBagConstraints.EAST;
    c.insets = new Insets(SPACING, MARGIN, 0, MARGIN);
    cPane.add(label, c);

    msg = mInvite.getPlayerJID();
    msg = StringUtils.parseBareAddress(msg);
    field = new JTextField(msg);
    field.setEditable(false);
    field.setBorder(BorderFactory.createEmptyBorder(2, 4, 2, 4));
    c = new GridBagConstraints();
    c.gridx = 0;
    c.gridy = row++;
    c.gridwidth = GridBagConstraints.REMAINDER;
    c.anchor = GridBagConstraints.WEST;
    c.insets = new Insets(SPACING, MARGIN, 0, MARGIN);
    cPane.add(field, c);

    String gamename = mInvite.getGameName();
    if (gamename != null) gamename = gamename.trim();

    if (gamename != null && !gamename.equals("")) msg = "  " + localize("MessageInvitedOf");
    else msg = "  " + localize("MessageInvited");
    label = new JLabel(msg);
    c = new GridBagConstraints();
    c.gridx = 0;
    c.gridy = row++;
    c.gridwidth = GridBagConstraints.REMAINDER;
    c.anchor = GridBagConstraints.WEST;
    c.insets = new Insets(SPACING, MARGIN, 0, MARGIN);
    cPane.add(label, c);

    if (gamename != null && !gamename.equals("")) {
      field = new JTextField(gamename);
      field.setEditable(false);
      field.setBorder(BorderFactory.createEmptyBorder(2, 4, 2, 4));
      c = new GridBagConstraints();
      c.gridx = 0;
      c.gridy = row++;
      c.gridwidth = GridBagConstraints.REMAINDER;
      c.anchor = GridBagConstraints.WEST;
      c.insets = new Insets(SPACING, MARGIN, 0, MARGIN);
      cPane.add(field, c);
    }

    String message = mInvite.getMessage();
    if (message != null) message = message.trim();

    if (message != null && !message.equals("")) {
      JTextArea textarea = new JTextArea();
      textarea.setEditable(false);
      textarea.setRows(4);
      textarea.setLineWrap(true);
      textarea.setWrapStyleWord(true);
      textarea.setText(message);
      c = new GridBagConstraints();
      c.gridx = 0;
      c.gridy = row++;
      c.gridwidth = GridBagConstraints.REMAINDER;
      c.weightx = 1;
      c.fill = GridBagConstraints.HORIZONTAL;
      c.anchor = GridBagConstraints.WEST;
      c.insets = new Insets(GAP, MARGIN, 0, MARGIN);
      JScrollPane scroller = new JScrollPane(textarea);
      scroller.setBorder(BorderFactory.createEmptyBorder(2, 4, 2, 4));
      cPane.add(scroller, c);
    }

    label = new JLabel(localize("LabelNickname"));
    c = new GridBagConstraints();
    c.gridx = 0;
    c.gridy = row;
    c.anchor = GridBagConstraints.WEST;
    c.insets = new Insets(GAP, MARGIN, 0, MARGIN);
    cPane.add(label, c);

    mNicknameField = new JTextField(20);
    c = new GridBagConstraints();
    c.gridx = 1;
    c.gridy = row++;
    c.weightx = 1;
    c.anchor = GridBagConstraints.WEST;
    c.insets = new Insets(GAP, SPACING, 0, MARGIN);
    cPane.add(mNicknameField, c);

    // Add panel with Cancel and Create buttons
    JPanel buttonPanel = new JPanel(new GridBagLayout());
    c = new GridBagConstraints();
    c.gridx = 0;
    c.gridy = row++;
    c.gridwidth = GridBagConstraints.REMAINDER;
    c.insets = new Insets(GAP, MARGIN, MARGIN, MARGIN);
    c.anchor = GridBagConstraints.EAST;
    c.weightx = 1;
    cPane.add(buttonPanel, c);

    mAcceptButton = new JButton(localize("ButtonAccept"));
    c = new GridBagConstraints();
    c.gridx = 2;
    c.gridy = 0;
    c.insets = new Insets(0, 0, 0, 0);
    c.anchor = GridBagConstraints.EAST;
    buttonPanel.add(mAcceptButton, c);

    mChatButton = new JButton(localize("ButtonDeclineChat"));
    c = new GridBagConstraints();
    c.gridx = 1;
    c.gridy = 0;
    c.insets = new Insets(0, SPACING, 0, 0);
    c.anchor = GridBagConstraints.EAST;
    buttonPanel.add(mChatButton, c);

    mDeclineButton = new JButton(localize("ButtonDecline"));
    c = new GridBagConstraints();
    c.gridx = 0;
    c.gridy = 0;
    c.insets = new Insets(0, SPACING, 0, 0);
    c.anchor = GridBagConstraints.EAST;
    buttonPanel.add(mDeclineButton, c);
  }
  /** Saves the current text of the fields to the preferences storage. */
  private void saveFieldValues() {
    Preferences prefs = Preferences.userNodeForPackage(getClass()).node(NODENAME);

    prefs.put(NICKNAME_KEY, mNicknameField.getText());
  }