/*
 *                 Sun Public License Notice
 *
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 *
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2004 Sun
 * Microsystems, Inc. All Rights Reserved.
 */
package org.netbeans.modules.refactoring.ui;

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.lang.reflect.Modifier;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;
import javax.jmi.reflect.RefObject;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableColumn;
import org.netbeans.modules.refactoring.api.ui.ParametersPanel;
import org.netbeans.jmi.javamodel.*;
import org.openide.util.NbBundle;

/**
 * Panel contains components for signature change. There is table with
 * parameters, you can add parameters, reorder parameteres or remove not
 * used paramaters (not available yet). You can also change access modifier.
 *
 * @author  Pavel Flaska
 */
public class ChangeParametersPanel extends javax.swing.JPanel {

    RefObject refactoredObj;
    ParamTableModel model;
    private ParametersPanel parent;
    
    private static Action editAction = null;
    
    private static final String[] modifierNames = {
        "public", // NOI18N
        "protected", // NOI18N
        "", // NOI18N
        "private" // NOI18N
    };
    
    private static final String[] columnNames = {
        getString("LBL_ChangeParsColName"), // NOI18N
        getString("LBL_ChangeParsColType"), // NOI18N
        getString("LBL_ChangeParsColDefVal"), // NOI18N
        getString("LBL_ChangeParsColOrigIdx") // NOI18N
    };

    // modifier items in combo - indexes
    private static final int MOD_PUBLIC_INDEX = 0;
    private static final int MOD_PROTECTED_INDEX = 1;
    private static final int MOD_DEFAULT_INDEX = 2;
    private static final int MOD_PRIVATE_INDEX = 3;

    private static final String ACTION_INLINE_EDITOR = "invokeInlineEditor";  //NOI18N

    /** Creates new form ChangeMethodSignature */
    public ChangeParametersPanel(RefObject refactoredObj, ParametersPanel parent) {
        this.refactoredObj = refactoredObj;
        if (refactoredObj instanceof CallableFeature) {
            initTableData();
            initComponents();
            setModifier();
            previewChange.setText(genDeclarationString());
        } else {
            // Title has to be set also in case of error. (No initialization
            // is provided in that case and initComponents is not called.)
            setName(getString("LBL_TitleChangeParameters")); // NOI18N
        }
        this.parent = parent;
    }

    protected DefaultTableModel getTableModel() {
        return model;
    }
    
    protected int getModifier() {
        switch (modifiersCombo.getSelectedIndex()) {
            case MOD_PRIVATE_INDEX: return Modifier.PRIVATE;
            case MOD_DEFAULT_INDEX: return 0; /* no modifier */
            case MOD_PROTECTED_INDEX: return Modifier.PROTECTED;
        }
        return Modifier.PUBLIC;
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    private void initComponents() {//GEN-BEGIN:initComponents
        java.awt.GridBagConstraints gridBagConstraints;

        modifiersPanel = new javax.swing.JPanel();
        modifiersLabel = new javax.swing.JLabel();
        modifiersCombo = new javax.swing.JComboBox();
        eastPanel = new javax.swing.JPanel();
        buttonsPanel = new javax.swing.JPanel();
        addButton = new javax.swing.JButton();
        removeButton = new javax.swing.JButton();
        moveUpButton = new javax.swing.JButton();
        moveDownButton = new javax.swing.JButton();
        fillPanel = new javax.swing.JPanel();
        westPanel = new javax.swing.JScrollPane();
        paramTable = new javax.swing.JTable();
        paramTitle = new javax.swing.JLabel();
        previewTitle = new javax.swing.JLabel();
        previewChange = new javax.swing.JLabel();

        setLayout(new java.awt.GridBagLayout());

        setBorder(new javax.swing.border.EmptyBorder(new java.awt.Insets(12, 12, 11, 11)));
        setName(getString("LBL_TitleChangeParameters"));
        modifiersPanel.setLayout(new java.awt.GridBagLayout());

        modifiersLabel.setDisplayedMnemonic(getString("LBL_ChangeParsMods_MNEM").charAt(0));
        modifiersLabel.setText(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("LBL_ChangeParsMods"));
        modifiersLabel.setLabelFor(modifiersCombo);
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        modifiersPanel.add(modifiersLabel, gridBagConstraints);

        modifiersCombo.setModel(new DefaultComboBoxModel(modifierNames));
        modifiersCombo.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                modifiersComboActionPerformed(evt);
            }
        });

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(0, 12, 0, 0);
        modifiersPanel.add(modifiersCombo, gridBagConstraints);
        modifiersCombo.getAccessibleContext().setAccessibleDescription(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("ACSD_modifiersCombo"));

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(11, 0, 0, 0);
        add(modifiersPanel, gridBagConstraints);

        eastPanel.setLayout(new java.awt.GridBagLayout());

        buttonsPanel.setLayout(new java.awt.GridBagLayout());

        buttonsPanel.setBorder(new javax.swing.border.EmptyBorder(new java.awt.Insets(1, 11, 1, 1)));
        addButton.setText(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("LBL_ChangeParsAdd"));
        addButton.setMnemonic(getString("LBL_ChangeParsAdd_MNEM").charAt(0));
        addButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                addButtonActionPerformed(evt);
            }
        });

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 5, 0);
        buttonsPanel.add(addButton, gridBagConstraints);
        addButton.getAccessibleContext().setAccessibleDescription(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("ACSD_ChangeParsAdd"));

        removeButton.setText(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("LBL_ChangeParsRemove"));
        removeButton.setMnemonic(getString("LBL_ChangeParsRemove_MNEM").charAt(0));
        removeButton.setEnabled(false);
        removeButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                removeButtonActionPerformed(evt);
            }
        });

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 5, 0);
        buttonsPanel.add(removeButton, gridBagConstraints);
        removeButton.getAccessibleContext().setAccessibleDescription(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("ACSD_ChangeParsRemove"));

        moveUpButton.setText(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("LBL_ChangeParsMoveUp"));
        moveUpButton.setMnemonic(getString("LBL_ChangeParsMoveUp_MNEM").charAt(0));
        moveUpButton.setEnabled(false);
        moveUpButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                moveUpButtonActionPerformed(evt);
            }
        });

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 5, 0);
        buttonsPanel.add(moveUpButton, gridBagConstraints);
        moveUpButton.getAccessibleContext().setAccessibleDescription(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("ACSD_ChangeParsMoveUp"));

        moveDownButton.setText(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("LBL_ChangeParsMoveDown"));
        moveDownButton.setMnemonic(getString("LBL_ChangeParsMoveDown_MNEM").charAt(0));
        moveDownButton.setEnabled(false);
        moveDownButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                moveDownButtonActionPerformed(evt);
            }
        });

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 3;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        buttonsPanel.add(moveDownButton, gridBagConstraints);
        moveDownButton.getAccessibleContext().setAccessibleDescription(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("ACSD_ChangeParsMoveDown"));

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        eastPanel.add(buttonsPanel, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        eastPanel.add(fillPanel, gridBagConstraints);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        add(eastPanel, gridBagConstraints);

        westPanel.setPreferredSize(new java.awt.Dimension(453, 100));
        paramTable.setModel(model);
        initRenderer();
        paramTable.getSelectionModel().addListSelectionListener(getListener1());
        paramTable.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
        model.addTableModelListener(getListener2());
        paramTable.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0), ACTION_INLINE_EDITOR); //NOI18N
        paramTable.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_F2, 0), ACTION_INLINE_EDITOR); //NOI18N
        paramTable.getActionMap().put(ACTION_INLINE_EDITOR, getEditAction()); //NOI18N
        paramTable.setSurrendersFocusOnKeystroke(true);
        paramTable.setCellSelectionEnabled(false);
        paramTable.setRowSelectionAllowed(true);
        paramTable.putClientProperty("JTable.autoStartsEdit", Boolean.FALSE); //NOI18N
        paramTable.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE); //NOI18N

        westPanel.setViewportView(paramTable);
        paramTable.getAccessibleContext().setAccessibleDescription(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("ACSD_paramTable"));

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        add(westPanel, gridBagConstraints);

        paramTitle.setDisplayedMnemonic(getString("LBL_ChangeParsParameters_MNEM").charAt(0));
        paramTitle.setHorizontalAlignment(javax.swing.SwingConstants.LEFT);
        paramTitle.setText(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("LBL_ChangeParsParameters"));
        paramTitle.setLabelFor(paramTable);
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 2, 0);
        add(paramTitle, gridBagConstraints);

        previewTitle.setText(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("LBL_ChangeParsPreview"));
        previewTitle.setName(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("LBL_ChangeParsPreview"));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 3;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(11, 0, 0, 0);
        add(previewTitle, gridBagConstraints);
        previewTitle.getAccessibleContext().setAccessibleName(java.util.ResourceBundle.getBundle("org/netbeans/modules/refactoring/ui/Bundle").getString("LBL_ChangeParsPreview"));

        previewChange.setText(" ");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 4;
        gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.NORTHWEST;
        add(previewChange, gridBagConstraints);

    }//GEN-END:initComponents

    private void modifiersComboActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_modifiersComboActionPerformed
        previewChange.setText(genDeclarationString());
    }//GEN-LAST:event_modifiersComboActionPerformed

    private void removeButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_removeButtonActionPerformed
        acceptEditedValue(); 
        int[] selectedRows = paramTable.getSelectedRows();
        ListSelectionModel selectionModel = paramTable.getSelectionModel();
        for (int i = 0; i < selectedRows.length; ++i)
            model.removeRow(selectedRows[i] - i);
        selectionModel.clearSelection();
    }//GEN-LAST:event_removeButtonActionPerformed

    private void moveDownButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_moveDownButtonActionPerformed
        doMove(1);
    }//GEN-LAST:event_moveDownButtonActionPerformed

    private void moveUpButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_moveUpButtonActionPerformed
        doMove(-1);
    }//GEN-LAST:event_moveUpButtonActionPerformed

    private void addButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_addButtonActionPerformed
        acceptEditedValue(); 
        int rowCount = model.getRowCount();
        model.addRow(new Object[] { "par" + rowCount, "Object", "", new Integer(-1) }); // NOI18N
    }//GEN-LAST:event_addButtonActionPerformed
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton addButton;
    private javax.swing.JPanel buttonsPanel;
    private javax.swing.JPanel eastPanel;
    private javax.swing.JPanel fillPanel;
    private javax.swing.JComboBox modifiersCombo;
    private javax.swing.JLabel modifiersLabel;
    private javax.swing.JPanel modifiersPanel;
    private javax.swing.JButton moveDownButton;
    private javax.swing.JButton moveUpButton;
    private javax.swing.JTable paramTable;
    private javax.swing.JLabel paramTitle;
    private javax.swing.JLabel previewChange;
    private javax.swing.JLabel previewTitle;
    private javax.swing.JButton removeButton;
    private javax.swing.JScrollPane westPanel;
    // End of variables declaration//GEN-END:variables

    private ListSelectionListener getListener1() {
        return new ListSelectionListener() {
            public void valueChanged(ListSelectionEvent e) {
                if (e.getValueIsAdjusting())
                    return;
                
                ListSelectionModel lsm = (ListSelectionModel) e.getSource();

                if (!lsm.isSelectionEmpty()) {
                    // Find out which indexes are selected.
                    int minIndex = lsm.getMinSelectionIndex();
                    int maxIndex = lsm.getMaxSelectionIndex();
                    setButtons(minIndex, maxIndex);
                    
                    boolean enableRemoveBtn = true;
                    for (int i = minIndex; i <= maxIndex; i++) {
                        enableRemoveBtn = model.isCellEditable(i, 0);
                        if (!enableRemoveBtn)
                            break;
                    }
                    removeButton.setEnabled(enableRemoveBtn);
                }
                else {
                    moveDownButton.setEnabled(false);
                    moveUpButton.setEnabled(false);
                    removeButton.setEnabled(false);
                }
            }
        };
    }
    
    private TableModelListener getListener2() {
        return new TableModelListener() {
            public void tableChanged(TableModelEvent e) {
                // update buttons availability
                int[] selectedRows = paramTable.getSelectedRows();
                if (selectedRows.length == 0) {
                    removeButton.setEnabled(false);
                }
                else {
                    boolean enableRemoveBtn = true;
                    for (int i = 0; i < selectedRows.length; i++) {
                        if (selectedRows[i] < model.getRowCount()) {
                            enableRemoveBtn = model.isCellEditable(selectedRows[i], 0);
                            if (!enableRemoveBtn)
                                break;
                        }
                    }
                    removeButton.setEnabled(enableRemoveBtn);
                    int min = selectedRows[0];
                    int max = selectedRows[selectedRows.length - 1];
                    setButtons(min, max);
                }
                
                // update preview
                previewChange.setText(genDeclarationString());
                
                parent.stateChanged(null);
            }
        };
    }

    private void initTableData() {
        model = new ParamTableModel(columnNames, 0);

        List params = ((CallableFeature) refactoredObj).getParameters();
        int originalIndex = 0;
        for (Iterator parIter = params.iterator(); parIter.hasNext(); ) {
            Parameter par = (Parameter) parIter.next();
            Type desc = par.getType();
            String typeRepresentation = getTypeStringRepresentation(desc);

            Object[] parRep = new Object[] { par.getName(), typeRepresentation, "", new Integer(originalIndex) };
            model.addRow(parRep);
            originalIndex++;
        }
    }
    
    private static String getTypeStringRepresentation(Type desc) {
        return desc.getName();
    }

    private boolean acceptEditedValue() {
        TableCellEditor tce = paramTable.getCellEditor();
        if (tce != null)
            return paramTable.getCellEditor().stopCellEditing();
        return false;
    }
    
    private void doMove(int step) {
        acceptEditedValue(); 
        
        ListSelectionModel selectionModel = paramTable.getSelectionModel();
        int min = selectionModel.getMinSelectionIndex();
        int max = selectionModel.getMaxSelectionIndex();
        
        selectionModel.clearSelection();
        model.moveRow(min, max, min + step);
        selectionModel.addSelectionInterval(min + step, max + step);
    }
    
    private void setButtons(int min, int max) {
        int r = model.getRowCount() - 1;
        moveUpButton.setEnabled(min > 0 ? true : false);
        moveDownButton.setEnabled(max < r ? true : false);
    }
    
    private void initRenderer() {
        paramTable.removeColumn(paramTable.getColumnModel().getColumn(3));
        Enumeration columns = paramTable.getColumnModel().getColumns();
        TableColumn tc = null;
        
        while (columns.hasMoreElements()) {
            tc = (TableColumn) columns.nextElement();
            tc.setCellRenderer(new DefaultTableCellRenderer());
        }
    }

    private void setModifier() {
        int mod = ((CallableFeature) refactoredObj).getModifiers();
        
        if (Modifier.isPrivate(mod))
            modifiersCombo.setSelectedIndex(MOD_PRIVATE_INDEX);
        else if (Modifier.isProtected(mod))
            modifiersCombo.setSelectedIndex(MOD_PROTECTED_INDEX);
        else if (Modifier.isPublic(mod))
            modifiersCombo.setSelectedIndex(MOD_PUBLIC_INDEX);
        else
            modifiersCombo.setSelectedIndex(MOD_DEFAULT_INDEX);
    }

    public String genDeclarationString() {
        // generate preview for modifiers
        // access modifiers
        String mod = modifiersCombo.getSelectedIndex() != MOD_DEFAULT_INDEX /*default modifier?*/ ?
            (String) modifiersCombo.getSelectedItem() + ' ' : ""; // NOI18N
        
        StringBuffer buf = new StringBuffer(mod);
        // other than access modifiers - using data provided by the element
        // first of all, reset access modifier, because it is generated from combo value
        String otherMod = Modifier.toString(((CallableFeature) refactoredObj).getModifiers() & 0xFFFFFFF8);
        if (otherMod.length() != 0) {
            buf.append(otherMod);
            buf.append(' ');
        }
        // generate the return type for the method and name
        // for the both - method and constructor
        String name;
        if (refactoredObj instanceof Method) {
            Method method = (Method) refactoredObj;
            buf.append(getTypeStringRepresentation(method.getType()));
            buf.append(' ');
            name = method.getName();
        }
        else {
            // for constructor, get name from the declaring class
            name = ((JavaClass) ((CallableFeature) refactoredObj).getDeclaringClass()).getSimpleName();
        }
        buf.append(name);
        buf.append('(');
        // generate parameters to the preview string
        List[] parameters = (List[]) model.getDataVector().toArray(new List[0]);
        if (parameters.length > 0) {
            int i;
            for (i = 0; i < parameters.length - 1; i++) {
                buf.append((String) parameters[i].get(1));
                buf.append(' ');
                buf.append((String) parameters[i].get(0));
                buf.append(',').append(' ');
            }
            buf.append((String) parameters[i].get(1));
            buf.append(' ');
            buf.append((String) parameters[i].get(0));
        }
        buf.append(')'); //NOI18N
        
        return buf.toString();
    }

    private static String getString(String key) {
        return NbBundle.getMessage(ChangeParametersPanel.class, key);
    }

    private static Action getEditAction() {
        if (editAction == null) {
            editAction = new EditAction();
        }
        return editAction;
    }

    private static void autoEdit(JTable tab) {
        if (tab.editCellAt(tab.getSelectedRow(), tab.getSelectedColumn(), null) &&
            tab.getEditorComponent() != null)
        {
            JTextField field = (JTextField) tab.getEditorComponent();
            int len = field.getText().length();
            field.setCaretPosition(field.getText().length());
            field.requestFocusInWindow();
            field.selectAll();
        }
    }
    
    ////////////////////////////////////////////////////////////////////////////
    // INNER CLASSES
    ////////////////////////////////////////////////////////////////////////////
    // this class is used for marking rows as read-only. If the user uses
    // standard DefaultTableModel, rows added through its methods is added
    // as a read-write. -- Use methods with Boolean paramater to add
    // rows marked as read-only.
    static class ParamTableModel extends DefaultTableModel {
        
        public ParamTableModel(Object[] data, int rowCount) {
            super(data, rowCount);
        }

        public boolean isCellEditable(int row, int column) {
            Integer origIdx = (Integer) ((Vector) getDataVector().get(row)).get(3);
            return origIdx.intValue() == -1 ? true : false;
        }
    } // end ParamTableModel
    
    private static class EditAction extends AbstractAction {
        public void actionPerformed(ActionEvent ae) {
            autoEdit((JTable) ae.getSource());
        }
    }
    // end INNERCLASSES
}