/** searches for a string in the cells */
  public void search() {
    String searchString;

    // display dialog
    searchString =
        ComponentHelper.showInputBox(
            getParent(), "Search...", "Enter the string to search for", m_LastSearch);
    if (searchString != null) m_LastSearch = searchString;

    getTable().setSearchString(searchString);
  }
  /** renames the current attribute */
  public void renameAttribute() {
    ArffSortedTableModel model;
    String newName;

    // no column selected?
    if (m_CurrentCol == -1) return;

    model = (ArffSortedTableModel) m_TableArff.getModel();

    // really an attribute column?
    if (model.getAttributeAt(m_CurrentCol) == null) return;

    newName =
        ComponentHelper.showInputBox(
            getParent(),
            "Rename attribute...",
            "Enter new Attribute name",
            model.getAttributeAt(m_CurrentCol).name());
    if (newName == null) return;

    setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
    model.renameAttributeAt(m_CurrentCol, newName);
    setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
  }
  /**
   * sets the specified values in a column to a new value
   *
   * @param o the menu item
   */
  private void setValues(Object o) {
    String msg;
    String title;
    String value;
    String valueNew;
    int i;
    ArffSortedTableModel model;

    value = "";
    valueNew = "";

    if (o == menuItemSetMissingValues) {
      title = "Replace missing values...";
      msg = "New value for MISSING values";
    } else if (o == menuItemSetAllValues) {
      title = "Set all values...";
      msg = "New value for ALL values";
    } else if (o == menuItemReplaceValues) {
      title = "Replace values...";
      msg = "Old value";
    } else return;

    value = ComponentHelper.showInputBox(m_TableArff.getParent(), title, msg, m_LastSearch);

    // cancelled?
    if (value == null) return;

    m_LastSearch = value;

    // replacement
    if (o == menuItemReplaceValues) {
      valueNew =
          ComponentHelper.showInputBox(m_TableArff.getParent(), title, "New value", m_LastReplace);
      if (valueNew == null) return;
      m_LastReplace = valueNew;
    }

    model = (ArffSortedTableModel) m_TableArff.getModel();
    model.setNotificationEnabled(false);

    // undo
    addUndoPoint();
    model.setUndoEnabled(false);
    String valueCopy = value;
    // set value
    for (i = 0; i < m_TableArff.getRowCount(); i++) {
      if (o == menuItemSetAllValues) {
        if (valueCopy.equals("NaN") || valueCopy.equals("?")) {
          value = null;
        }
        model.setValueAt(value, i, m_CurrentCol);
      } else if ((o == menuItemSetMissingValues) && model.isMissingAt(i, m_CurrentCol))
        model.setValueAt(value, i, m_CurrentCol);
      else if ((o == menuItemReplaceValues)
          && model.getValueAt(i, m_CurrentCol).toString().equals(value))
        model.setValueAt(valueNew, i, m_CurrentCol);
    }
    model.setUndoEnabled(true);
    model.setNotificationEnabled(true);
    model.notifyListener(
        new TableModelEvent(model, 0, model.getRowCount(), m_CurrentCol, TableModelEvent.UPDATE));

    // refresh
    m_TableArff.repaint();
  }