/// <summary>
        /// Responds to action performed events. </summary>
        /// <param name="ae"> the ActionEvent that happened. </param>
        public virtual void actionPerformed(ActionEvent ae)
        {
            string routine = "StateMod_OutputControl_JFrame.actionPerformed";
            string action  = ae.getActionCommand();

            if (action.Equals(__BUTTON_ADD_ROW))
            {
                if (!__tableModel.canAddNewRow())
                {
                    return;
                }
                __dirty = true;
                int row = __worksheet.getRowCount();

                StateMod_GraphNode n = new StateMod_GraphNode();
                __worksheet.addRow(n);
                n.setType("");
                n.setID("");
                n.setSwitch(-1);
                __tableModel.setDirty(true);

                // when a row is added, mark the second and third columns
                // as uneditable.  They will be set to editable as soon as
                // the user enters a value in the first column
                __worksheet.setCellEditable(row, 1, false);
                __worksheet.setCellEditable(row, 2, false);
            }
            else if (action.Equals(__BUTTON_CLEAR_LIST))
            {
                __dirty = true;
                __worksheet.clear();
                setMessages("Add station to list.", "Ready");
                __tableModel.setDirty(true);
            }
            else if (action.Equals(__BUTTON_CLOSE))
            {
                closeWindow();
            }
            else if (action.Equals(__BUTTON_DELETE_ROW))
            {
                int[] rows = __worksheet.getSelectedRows();

                int length = rows.Length;
                __tableModel.setDirty(true);

                if (length == 0)
                {
                    return;
                }

                for (int i = (length - 1); i >= 0; i--)
                {
                    __worksheet.deleteRow(rows[i]);
                }
                __dirty = true;
                setMessages("Time series list has changed.", "Ready");
            }
            else if (action.Equals(__BUTTON_HELP))
            {
                // REVISIT HELP (JTS - 2003-07-09)
            }
            else if (action.Equals(__BUTTON_SAVE_FILE))
            {
                JGUIUtil.setWaitCursor(this, true);
                string lastDirectorySelected = JGUIUtil.getLastFileDialogDirectory();

                JFileChooser fc = null;
                if (!string.ReferenceEquals(lastDirectorySelected, null))
                {
                    fc = new JFileChooser(lastDirectorySelected);
                }
                else
                {
                    fc = new JFileChooser();
                }

                fc.setDialogTitle("Select Output Control File");
                SimpleFileFilter @out = new SimpleFileFilter("out", "StateMod Output Control Files");
                fc.addChoosableFileFilter(@out);
                SimpleFileFilter tpl = new SimpleFileFilter("tpo", "StateMod Output Control Files");
                fc.addChoosableFileFilter(tpl);
                SimpleFileFilter xou = new SimpleFileFilter("xou", "StateMod Output Control Files");
                fc.addChoosableFileFilter(xou);
                fc.setAcceptAllFileFilterUsed(false);
                fc.setFileFilter(tpl);
                fc.setDialogType(JFileChooser.SAVE_DIALOG);

                JGUIUtil.setWaitCursor(this, false);

                int retVal = fc.showSaveDialog(this);
                if (retVal != JFileChooser.APPROVE_OPTION)
                {
                    return;
                }

                string currDir = (fc.getCurrentDirectory()).ToString();

                if (!currDir.Equals(lastDirectorySelected, StringComparison.OrdinalIgnoreCase))
                {
                    JGUIUtil.setLastFileDialogDirectory(currDir);
                }
                string filename = fc.getSelectedFile().getName();

                FileFilter ff = fc.getFileFilter();
                if (ff == @out)
                {
                    filename = IOUtil.enforceFileExtension(filename, "out");
                }
                else if (ff == tpl)
                {
                    filename = IOUtil.enforceFileExtension(filename, "tpo");
                }
                else if (ff == xou)
                {
                    filename = IOUtil.enforceFileExtension(filename, "xou");
                }

                __dirty = false;
                __tableModel.setDirty(false);

                System.Collections.IList theGraphNodes = __worksheet.getAllData();

                try
                {
                    StateMod_GraphNode.writeStateModOutputControlFile(null, currDir + File.separator + filename, theGraphNodes, null);
                }
                catch (Exception e)
                {
                    Message.printWarning(1, routine, "Error saving output control file\n" + "\"" + currDir + File.separator + filename + "\"", this);
                    Message.printWarning(2, routine, e);
                }
            }
            else if (action.Equals(__BUTTON_LOAD_FILE))
            {
                JGUIUtil.setWaitCursor(this, true);
                string lastDirectorySelected = JGUIUtil.getLastFileDialogDirectory();

                JFileChooser fc = null;
                if (!string.ReferenceEquals(lastDirectorySelected, null))
                {
                    fc = new JFileChooser(lastDirectorySelected);
                }
                else
                {
                    fc = new JFileChooser();
                }

                fc.setDialogTitle("Select Output Control File");
                SimpleFileFilter @out = new SimpleFileFilter("out", "StateMod Output Control Files");
                fc.addChoosableFileFilter(@out);
                SimpleFileFilter tpl = new SimpleFileFilter("tpo", "StateMod Output Control Files");
                fc.addChoosableFileFilter(tpl);
                SimpleFileFilter xou = new SimpleFileFilter("xou", "StateMod Output Control Files");
                fc.addChoosableFileFilter(xou);
                fc.setAcceptAllFileFilterUsed(false);
                fc.setFileFilter(tpl);
                fc.setDialogType(JFileChooser.OPEN_DIALOG);

                JGUIUtil.setWaitCursor(this, false);
                int retVal = fc.showOpenDialog(this);
                if (retVal != JFileChooser.APPROVE_OPTION)
                {
                    return;
                }

                string currDir = (fc.getCurrentDirectory()).ToString();

                if (!currDir.Equals(lastDirectorySelected, StringComparison.OrdinalIgnoreCase))
                {
                    JGUIUtil.setLastFileDialogDirectory(currDir);
                }
                string filename = fc.getSelectedFile().getName();

                JGUIUtil.setWaitCursor(this, true);

                __dirty = false;

                System.Collections.IList theGraphNodes = new List <object>(20, 1);

                try
                {
                    __worksheet.clear();
                    __tableModel.setDirty(false);
                    StateMod_GraphNode.readStateModOutputControlFile(theGraphNodes, currDir + File.separator + filename);

                    int size             = theGraphNodes.Count;
                    StateMod_GraphNode g = null;
                    int row = 0;
                    for (int i = 0; i < size; i++)
                    {
                        row = __worksheet.getRowCount();
                        g   = (StateMod_GraphNode)theGraphNodes[i];
                        if (i == 0)
                        {
                            if (g.getID().Equals("All"))
                            {
                                __useAllJCheckBox.setSelected(true);
                            }
                            else
                            {
                                __useAllJCheckBox.setSelected(false);
                            }
                        }
                        __worksheet.addRow(g);

                        __tableModel.fillIDColumn(row, g.getType());
                    }
                    __worksheet.setData(theGraphNodes);
                }
                catch (Exception e)
                {
                    Message.printWarning(1, routine, "Error loading output control file\n" + "\"" + currDir + File.separator + filename + "\"", this);
                    Message.printWarning(2, routine, e);
                }
                JGUIUtil.setWaitCursor(this, false);
            }
            else if (action.Equals(__CHECKBOX_USE_ALL))
            {
                // if the use all checkbox is selected, subtle changes from the
                // default functionality are made.  The buttons to add and
                // delete rows are disabled, and the ID of the only record
                // in the worksheet is set to "All".  This ID value is used
                // in the table model to determine when the checkbox is
                // selected.  In addition, the ComboBox functionality of the
                // first and third data columns is turned off.

                if (__useAllJCheckBox.isSelected())
                {
                    __addRowButton.setEnabled(false);
                    __deleteRowButton.setEnabled(false);
                    __worksheet.setColumnJComboBoxValues(0, null);
                    __worksheet.setColumnJComboBoxValues(2, null);
                    __worksheet.clear();
                    StateMod_GraphNode g = new StateMod_GraphNode();
                    g.setID("All");
                    __worksheet.setCellEditable(0, 0, false);
                    __worksheet.setCellEditable(0, 1, false);
                    __worksheet.setCellEditable(0, 2, false);
                    __worksheet.addRow(g);
                }
                else
                {
                    __addRowButton.setEnabled(true);
                    __deleteRowButton.setEnabled(true);
                    System.Collections.IList v = StateMod_Util.arrayToList(StateMod_GraphNode.node_types);
                    v.Add("Other");
                    __worksheet.setColumnJComboBoxValues(0, v);
                    __worksheet.clear();
                    System.Collections.IList offOn = new List <object>();
                    offOn.Add("Off");
                    offOn.Add("On");
                    __worksheet.setCellEditable(0, 0, true);
                    __worksheet.setColumnJComboBoxValues(2, offOn);
                }
            }
        }