/** Method declaration */
  private void initGUI() {

    Panel pQuery = new Panel();
    Panel pCommand = new Panel();

    pResult = new Panel();

    pQuery.setLayout(new BorderLayout());
    pCommand.setLayout(new BorderLayout());
    pResult.setLayout(new BorderLayout());

    Font fFont = new Font("Dialog", Font.PLAIN, 12);

    txtCommand = new TextArea(5, 40);

    txtCommand.addKeyListener(this);

    txtResult = new TextArea(20, 40);

    txtCommand.setFont(fFont);
    txtResult.setFont(new Font("Courier", Font.PLAIN, 12));

    butExecute = new Button("Execute");
    butClear = new Button("Clear");

    butExecute.addActionListener(this);
    butClear.addActionListener(this);
    pCommand.add("East", butExecute);
    pCommand.add("West", butClear);
    pCommand.add("Center", txtCommand);

    gResult = new Grid();

    setLayout(new BorderLayout());
    pResult.add("Center", gResult);
    pQuery.add("North", pCommand);
    pQuery.add("Center", pResult);
    fMain.add("Center", pQuery);

    tTree = new Tree();

    // (ulrivo): screen with less than 640 width
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();

    if (d.width >= 640) {
      tTree.setMinimumSize(new Dimension(200, 100));
    } else {
      tTree.setMinimumSize(new Dimension(80, 100));
    }

    gResult.setMinimumSize(new Dimension(200, 300));
    fMain.add("West", tTree);
    doLayout();
    fMain.pack();
  }
  /**
   * Method declaration
   *
   * @param ev
   */
  public void actionPerformed(ActionEvent ev) {

    String s = ev.getActionCommand();

    if (s == null) {
      if (ev.getSource() instanceof MenuItem) {
        MenuItem i;

        s = ((MenuItem) ev.getSource()).getLabel();
      }
    }

    if (s.equals("Execute")) {
      execute();
    } else if (s.equals("Exit")) {
      windowClosing(null);
    } else if (s.equals("Transfer")) {
      Transfer.work(null);
    } else if (s.equals("Dump")) {
      Transfer.work(new String[] {"-d"});

      /* NB - 26052002 Restore is not implemented yet in the transfer tool */
      /*
              } else if (s.equals("Restore")) {
                  Transfer.work(new String[]{"-r"});
      */
    } else if (s.equals("Logging on")) {
      jdbcSystem.setLogToSystem(true);
    } else if (s.equals("Logging off")) {
      jdbcSystem.setLogToSystem(false);
    } else if (s.equals("Refresh Tree")) {
      refreshTree();
    } else if (s.startsWith("#")) {
      int i = Integer.parseInt(s.substring(1));

      txtCommand.setText(sRecent[i]);
    } else if (s.equals("Connect...")) {
      connect(ConnectionDialog.createConnection(fMain, "Connect"));
      refreshTree();
    } else if (s.equals("Results in Grid")) {
      iResult = 0;

      pResult.removeAll();
      pResult.add("Center", gResult);
      pResult.doLayout();
    } else if (s.equals("Open Script...")) {
      FileDialog f = new FileDialog(fMain, "Open Script", FileDialog.LOAD);

      // (ulrivo): set default directory if set from command line
      if (defDirectory != null) {
        f.setDirectory(defDirectory);
      }

      f.show();

      String file = f.getFile();

      if (file != null) {
        txtCommand.setText(DatabaseManagerCommon.readFile(f.getDirectory() + file));
      }
    } else if (s.equals("Save Script...")) {
      FileDialog f = new FileDialog(fMain, "Save Script", FileDialog.SAVE);

      // (ulrivo): set default directory if set from command line
      if (defDirectory != null) {
        f.setDirectory(defDirectory);
      }

      f.show();

      String file = f.getFile();

      if (file != null) {
        DatabaseManagerCommon.writeFile(f.getDirectory() + file, txtCommand.getText());
      }
    } else if (s.equals("Save Result...")) {
      FileDialog f = new FileDialog(fMain, "Save Result", FileDialog.SAVE);

      // (ulrivo): set default directory if set from command line
      if (defDirectory != null) {
        f.setDirectory(defDirectory);
      }

      f.show();

      String file = f.getFile();

      if (file != null) {
        showResultInText();
        DatabaseManagerCommon.writeFile(f.getDirectory() + file, txtResult.getText());
      }
    } else if (s.equals("Results in Text")) {
      iResult = 1;

      pResult.removeAll();
      pResult.add("Center", txtResult);
      pResult.doLayout();
      showResultInText();
    } else if (s.equals("AutoCommit on")) {
      try {
        cConn.setAutoCommit(true);
      } catch (SQLException e) {
      }
    } else if (s.equals("AutoCommit off")) {
      try {
        cConn.setAutoCommit(false);
      } catch (SQLException e) {
      }
    } else if (s.equals("Enlarge Tree")) {
      Dimension d = tTree.getMinimumSize();

      d.width += 20;

      tTree.setMinimumSize(d);
      fMain.pack();
    } else if (s.equals("Shrink Tree")) {
      Dimension d = tTree.getMinimumSize();

      d.width -= 20;

      if (d.width >= 0) {
        tTree.setMinimumSize(d);
      }

      fMain.pack();
    } else if (s.equals("Enlarge Command")) {
      txtCommand.setRows(txtCommand.getRows() + 1);
      fMain.pack();
    } else if (s.equals("Shrink Command")) {
      int i = txtCommand.getRows() - 1;

      txtCommand.setRows(i < 1 ? 1 : i);
      fMain.pack();
    } else if (s.equals("Commit")) {
      try {
        cConn.commit();
      } catch (SQLException e) {
      }
    } else if (s.equals("Insert test data")) {
      insertTestData();
    } else if (s.equals("Rollback")) {
      try {
        cConn.rollback();
      } catch (SQLException e) {
      }
    } else if (s.equals("Disable MaxRows")) {
      try {
        sStatement.setMaxRows(0);
      } catch (SQLException e) {
      }
    } else if (s.equals("Set MaxRows to 100")) {
      try {
        sStatement.setMaxRows(100);
      } catch (SQLException e) {
      }
    } else if (s.equals("SELECT")) {
      showHelp(DatabaseManagerCommon.selectHelp);
    } else if (s.equals("INSERT")) {
      showHelp(DatabaseManagerCommon.insertHelp);
    } else if (s.equals("UPDATE")) {
      showHelp(DatabaseManagerCommon.updateHelp);
    } else if (s.equals("DELETE")) {
      showHelp(DatabaseManagerCommon.deleteHelp);
    } else if (s.equals("CREATE TABLE")) {
      showHelp(DatabaseManagerCommon.createTableHelp);
    } else if (s.equals("DROP TABLE")) {
      showHelp(DatabaseManagerCommon.dropTableHelp);
    } else if (s.equals("CREATE INDEX")) {
      showHelp(DatabaseManagerCommon.createIndexHelp);
    } else if (s.equals("DROP INDEX")) {
      showHelp(DatabaseManagerCommon.dropIndexHelp);
    } else if (s.equals("CHECKPOINT")) {
      showHelp(DatabaseManagerCommon.checkpointHelp);
    } else if (s.equals("SCRIPT")) {
      showHelp(DatabaseManagerCommon.scriptHelp);
    } else if (s.equals("SHUTDOWN")) {
      showHelp(DatabaseManagerCommon.shutdownHelp);
    } else if (s.equals("SET")) {
      showHelp(DatabaseManagerCommon.setHelp);
    } else if (s.equals("Test Script")) {
      showHelp(DatabaseManagerCommon.testHelp);
    }
  }
  /** Method declaration */
  private void refreshTree() {

    tTree.removeAll();

    try {
      int color_table = Color.yellow.getRGB();
      int color_column = Color.orange.getRGB();
      int color_index = Color.red.getRGB();

      tTree.addRow("", dMeta.getURL(), "-", 0);

      String usertables[] = {"TABLE"};
      ResultSet result = dMeta.getTables(null, null, null, usertables);
      Vector tables = new Vector();

      // sqlbob@users Added remarks.
      Vector remarks = new Vector();

      while (result.next()) {
        tables.addElement(result.getString(3));
        remarks.addElement(result.getString(5));
      }

      result.close();

      for (int i = 0; i < tables.size(); i++) {
        String name = (String) tables.elementAt(i);
        String key = "tab-" + name + "-";

        tTree.addRow(key, name, "+", color_table);

        // sqlbob@users Added remarks.
        String remark = (String) remarks.elementAt(i);

        if ((remark != null) && !remark.trim().equals("")) {
          tTree.addRow(key + "r", " " + remark);
        }

        ResultSet col = dMeta.getColumns(null, null, name, null);

        while (col.next()) {
          String c = col.getString(4);
          String k1 = key + "col-" + c + "-";

          tTree.addRow(k1, c, "+", color_column);

          String type = col.getString(6);

          tTree.addRow(k1 + "t", "Type: " + type);

          boolean nullable = col.getInt(11) != DatabaseMetaData.columnNoNulls;

          tTree.addRow(k1 + "n", "Nullable: " + nullable);
        }

        col.close();
        tTree.addRow(key + "ind", "Indices", "+", 0);

        ResultSet ind = dMeta.getIndexInfo(null, null, name, false, false);
        String oldiname = null;

        while (ind.next()) {
          boolean nonunique = ind.getBoolean(4);
          String iname = ind.getString(6);
          String k2 = key + "ind-" + iname + "-";

          if ((oldiname == null || !oldiname.equals(iname))) {
            tTree.addRow(k2, iname, "+", color_index);
            tTree.addRow(k2 + "u", "Unique: " + !nonunique);

            oldiname = iname;
          }

          String c = ind.getString(9);

          tTree.addRow(k2 + "c-" + c + "-", c);
        }

        ind.close();
      }

      tTree.addRow("p", "Properties", "+", 0);
      tTree.addRow("pu", "User: "******"pr", "ReadOnly: " + cConn.isReadOnly());
      tTree.addRow("pa", "AutoCommit: " + cConn.getAutoCommit());
      tTree.addRow("pd", "Driver: " + dMeta.getDriverName());
      tTree.addRow("pp", "Product: " + dMeta.getDatabaseProductName());
      tTree.addRow("pv", "Version: " + dMeta.getDatabaseProductVersion());
    } catch (SQLException e) {
      tTree.addRow("", "Error getting metadata:", "-", 0);
      tTree.addRow("-", e.getMessage());
      tTree.addRow("-", e.getSQLState());
    }

    tTree.update();
  }