Combo in JTable Cell

Question

Hi Everyone,
1) I want to display combo boxes in some selected colmns of my JTable.
2) I want the user to enter table cell's edit mode directly when he clicks on a cell.
For above functionality No. 2), i got following running code from this forum (Mr. Camickr) as follows. Can you guys suggest me where and how to add code to display combo?
Thanks in advance.
Girish Varde
** For text selection you have two choices. Remove the "xxx" from either
** editCellAt() or prepareEditor() method.
** The difference is in how mouse double clicking works
** To place a cell directly into edit mode, use the changeSelection() method.
** Be aware this will generate a TableModelEvent every time you leave a cell.
** You can also use either of the above text selection methods.
�
import java.awt.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.table.*;
�
public class TableEditCell extends JFrame
public TableEditCell()
String[] columnNames = {"Number", "Letter"};
Object[][] data = { {"1", "A"}, {"2", "B"}, {"3", "C"} };
�
JTable table = new JTable(data, columnNames)
// Place cell in edit mode when it 'gains focus'
�
public void xxxchangeSelection(
int row, int column, boolean toggle, boolean extend)
super.changeSelection(row, column, toggle, extend);
�
if (editCellAt(row, column))
getEditorComponent().requestFocusInWindow();
�
// Select the text when the cell starts editing
// a) text will be replaced when you start typing in a cell
// b) text will be selected when you use F2 to start editing
// c) text will be selected when double clicking to start editing
�
public boolean xxxeditCellAt(int row, int column, EventObject e)
boolean result = super.editCellAt(row, column, e);
final Component editor = getEditorComponent();
�
if (editor != null && editor instanceof JTextComponent)
if (e == null)
((JTextComponent)editor).selectAll();
else
SwingUtilities.invokeLater(new Runnable()
public void run()
((JTextComponent)editor).selectAll();
�
return result;
�
// Select the text when the cell starts editing
// a) text will be replaced when you start typing in a cell
// b) text will be selected when you use F2 to start editing
// c) caret is placed at end of text when double clicking to start editing
�
public Component xxxprepareEditor(
TableCellEditor editor, int row, int column)
Component c = super.prepareEditor(editor, row, column);
�
if (c instanceof JTextComponent)
((JTextField)c).selectAll();
�
return c;
�
JScrollPane scrollPane = new JScrollPane( table );
getContentPane().add( scrollPane );
�
public static void main(String[] args)
TableEditCell frame = new TableEditCell();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible(true);
-------------------------------------------------------------------------------------------------------�

Answer 1

OK. Here is my code divided in two classes
package com.apsiva.client.pi;
* @author Administrator
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
import java.awt.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.table.*;
import com.apsiva.client.iedit.ItemCellEditor;
public class TableEditCell extends JFrame
        public TableEditCell()
                String[] columnNames = {"Number", "Letter"};
                Object[][] data = { {"1", "A"}, {"2", "B"}, {"3", "C"} };
                JTable table = new JTable(data, columnNames)
                        //  Place cell in edit mode when it 'gains focus'
                        public void changeSelection(
                                int row, int column, boolean toggle, boolean extend)
                                super.changeSelection(row, column, toggle, extend);
                                if (editCellAt(row, column))
                                        getEditorComponent().requestFocusInWindow();
                        //  Select the text when the cell starts editing
                        //  a) text will be replaced when you start typing in a cell
                        //  b) text will be selected when you use F2 to start editing
                        //  c) text will be selected when double clicking to start editing
//                        public boolean xxxeditCellAt(int row, int column, EventObject e)
                        public boolean xxxeditCellAt(int row, int column, EventObject e)
                                boolean result = super.editCellAt(row, column, e);
                                final Component editor = getEditorComponent();
                                if (editor != null && editor instanceof JTextComponent)
                                        if (e == null)
                                                ((JTextComponent)editor).selectAll();
                                        else
                                                SwingUtilities.invokeLater(new Runnable()
                                                        public void run()
                                                                ((JTextComponent)editor).selectAll();
                                return result;
                        //  Select the text when the cell starts editing
                        //  a) text will be replaced when you start typing in a cell
                        //  b) text will be selected when you use F2 to start editing
                        //  c) caret is placed at end of text when double clicking to start editing
//                        public Component xxxprepareEditor(
                        public Component prepareEditor(
                                TableCellEditor editor, int row, int column)
                                Component c = super.prepareEditor(editor, row, column);
                                if (c instanceof JTextComponent)
                                        ((JTextField)c).selectAll();
                                return c;
                JScrollPane scrollPane = new JScrollPane( table );
                getContentPane().add( scrollPane );
                String[] data1 = {"A","B","C"} ;
                String[] data2 = {"D","E","F"} ;
                String[] data3 = {"G","H","I"} ;
                Vector comboBoxModels = new Vector() ;
                comboBoxModels.addElement(new DefaultComboBoxModel(data1)) ;
                comboBoxModels.addElement(new DefaultComboBoxModel(data2)) ;
                comboBoxModels.addElement(new DefaultComboBoxModel(data3)) ; 
                ItemCellEditor ice = new ItemCellEditor(new JComboBox(comboBoxModels));
                table.getColumnModel().getColumn(0).setCellEditor(ice) ;
        public static void main(String[] args)
                TableEditCell frame = new TableEditCell();
                frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
                frame.pack();
                frame.setLocationRelativeTo( null );
                frame.setVisible(true);
package com.apsiva.client.iedit;
* @author Administrator
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
* Created on Mar 16, 2005
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
import java.awt.Component;
import java.util.EventObject;
import java.util.Vector;
import javax.swing.*;
import javax.swing.event.CellEditorListener;
* @author Administrator
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
public class ItemCellEditor extends  DefaultCellEditor implements javax.swing.table.TableCellEditor {
      * @param arg0
     public ItemCellEditor(JComboBox arg0) {
          super(arg0);
          // TODO Auto-generated constructor stub
     /* (non-Javadoc)
      * @see javax.swing.CellEditor#addCellEditorListener(javax.swing.event.CellEditorListener)
     /* (non-Javadoc)
      * @see javax.swing.table.TableCellEditor#getTableCellEditorComponent(javax.swing.JTable, java.lang.Object, boolean, int, int)
      public Component getTableCellEditorComponent(
                 JTable table, Object value, boolean isSelected,int row,
                 int column ) {
          // TODO Auto-generated method stub
//                      if (iRowToEdit != row)  //For disabling editing
//                      return null;
                      int i = 0;
//                      return super.getTableCellEditorComponent(
//                      table, value, isSelected,row, column );
                      JComboBox combo = (JComboBox) super.getTableCellEditorComponent(
                                table, value, isSelected,row, column );
                     String[] data1 = {"A","B","C"} ;
                     String[] data2 = {"D","E","F"} ;
                     String[] data3 = {"G","H","I"} ;
                     Vector comboOptions = new Vector();
                     comboOptions.add("Choice 1");
                       comboOptions.add("Choice 2");
                        comboOptions.add("Choice 3");
                        comboOptions.add("Choice 4");
                     ComboBoxModel comboBoxModels = new DefaultComboBoxModel(comboOptions) ;
                     combo.setModel(comboBoxModels);
                  if (column == 0 )   return combo;
                      return super.getTableCellEditorComponent(
                                table, value, isSelected,row, column );
     /* (non-Javadoc)
      * @see javax.swing.CellEditor#addCellEditorListener(javax.swing.event.CellEditorListener)
     public void addCellEditorListener(CellEditorListener arg0) {
          // TODO Auto-generated method stub
           int i = 0;
     /* (non-Javadoc)
      * @see javax.swing.CellEditor#cancelCellEditing()
     public void cancelCellEditing() {
          // TODO Auto-generated method stub
           int i = 0;
     /* (non-Javadoc)
      * @see javax.swing.CellEditor#getCellEditorValue()
     public Object getCellEditorValue() {
          // TODO Auto-generated method stub
           int i = 0;
          return null;
     /* (non-Javadoc)
      * @see javax.swing.CellEditor#isCellEditable(java.util.EventObject)
     public boolean isCellEditable(EventObject arg0) {
          // TODO Auto-generated method stub
          JTable table = (JTable)arg0.getSource();
          int column = table.getSelectedColumn();
           int i = 0;
           return true;
     /* (non-Javadoc)
      * @see javax.swing.CellEditor#removeCellEditorListener(javax.swing.event.CellEditorListener)
     public void removeCellEditorListener(CellEditorListener arg0) {
           int i = 0;
          // TODO Auto-generated method stub
     /* (non-Javadoc)
      * @see javax.swing.CellEditor#shouldSelectCell(java.util.EventObject)
     public boolean shouldSelectCell(EventObject arg0) {
          // TODO Auto-generated method stub
           int i = 0;
          return true;
     /* (non-Javadoc)
      * @see javax.swing.CellEditor#stopCellEditing()
     public boolean stopCellEditing() {
          // TODO Auto-generated method stub
           int i = 0;
          return false;
--------------------------------------------------------------------------------------------------When i click outside table, then once again the cells become editable unless first column is clicked.
Please suggest a solution.
Thanks and regards,
Girish Varde