JTable functionality

[sean mclaughlin]

could anyone out there please help me....
what i want is a table that when the user right clicks on an item a menu comes up from which they can select functions which involve that particluar item(s).
Thanks in advance, Sean
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sean's software tips

[Nathan Pruett]

Here's some code that should help you out...

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
 
public class TableHandler extends JFrame
{
    private JTable table;
 
    public TableHandler()
    {
        table = new JTable( new MyTableModel() );
        table.addMouseListener( new TableClickHandler() );
        JScrollPane sp = new JScrollPane( table );
        getContentPane().add( sp, BorderLayout.CENTER );
        pack();
        setVisible( true );
        addWindowListener( new ExitHandler() );
    }
 
    public static void main( String[] args )
    {
        new TableHandler();
    }
 
    private class ExitHandler extends WindowAdapter
    {
        public void windowClosing( WindowEvent e )
        {
            System.exit( 0 );
        }
    }
 
    private class MyTableModel extends DefaultTableModel
    {
        private String[] columnNames = { "Name", "Title", "On Duty?" };
 
        private Object[][] data = { { "Sulley", "Scarer", new Boolean( true ) },
                                    { "Mike", "Assistant Scarer", new Boolean( true ) },
                                    { "Randall", "Scarer", new Boolean( false ) },
                                    { "Roz", "Dispatch Manager", new Boolean( false ) },
                                    { "Celia", "Receptionist", new Boolean( true )  },
                                    { "Henry J. Waternoose", "CEO", new Boolean( false ) } };
 
        public MyTableModel()
        {
            setDataVector( data, columnNames );
        }
 
        public boolean isCellEditable( int row, int column )
        {
            return( false );
        }
 
        public Class getColumnClass( int columnIndex )
        {
            Class returnedClass = null;
            switch( columnIndex )
            {
                case( 0 ) : returnedClass = new String().getClass();
                            break;
                case( 1 ) : returnedClass = new String().getClass();
                            break;
                case( 2 ) : returnedClass = new Boolean( true ).getClass();
                            break;
            }
 
            return( returnedClass );
        }
    }
 
    private class TableClickHandler extends MouseAdapter
    {
        public void mouseClicked( MouseEvent e )
        {
            JTable table = (JTable)e.getSource();
            int column = table.columnAtPoint( e.getPoint() );
            int row    = table.rowAtPoint( e.getPoint() );
 
            if( e.isMetaDown() && row > -1 && column > -1 )
            {
                Object obj = table.getValueAt( row, column );
                JPopupMenu pop = new JPopupMenu();
                Vector menuItems = MenuFactory.getMenusForClass( obj.getClass() );
                for( int i = 0; i < menuItems.size(); i++ )
                {
                    pop.add( ( JMenuItem )menuItems.get(i) );
                }
                pop.show( table, e.getX(), e.getY() );
            }
        }
    }
 
    private static class MenuFactory
    {
        public static Vector getMenusForClass( Class c )
        {
            Vector menus = new Vector();
            if( c.equals( new String().getClass() ) )
            {
                menus.add( new JMenuItem( "Edit" ) );
            }
            else if( c.equals( new Boolean( true ).getClass() ) )
            {
                menus.add( new JMenuItem( "true" ) );
                menus.add( new JMenuItem( "false" ) );
            }
 
            return( menus );
        }
    }
}

-Nate

[sean mclaughlin]

That for the quick response, that's just what i needed, it work fine, thanx