Only focus on items in JTable wich are editable

Question

Hi,
I have a jtable with custom renderers and sometimes editors. When I tab through the table I only want it to tab from editable field to editable field thus skip the normal fields. Does anyone know how to do this?
Thanks is advance,
Hugo

Answer 1

This example shows some things you can do with InputMaps and ActionMaps:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
public class TableActions extends JFrame
    public TableActions()
        JTable table = new JTable(15, 5)
            public boolean isCellEditable(int row, int column)
              return column % 2 == 0;
//              return false;
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        JScrollPane scrollPane = new JScrollPane( table );
        getContentPane().add( scrollPane );
        InputMap im = table.getInputMap(JTable.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
        //  Have the enter key work the same as the tab key
        KeyStroke tab = KeyStroke.getKeyStroke(KeyEvent.VK_TAB, 0);
        KeyStroke enter = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0);
        im.put(enter, im.get(tab));
        //  Disable the right arrow key
        KeyStroke right = KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0);
        im.put(right, "none");
        //  Override the default tab behaviour
        //  Tab to the next editable cell. When no editable cells goto next cell.
        final Action oldTabAction = table.getActionMap().get(im.get(tab));
        Action tabAction = new AbstractAction()
            public void actionPerformed(ActionEvent e)
                oldTabAction.actionPerformed( e );
                JTable table = (JTable)e.getSource();
                int rowCount = table.getRowCount();
                int columnCount = table.getColumnCount();
                int row = table.getSelectedRow();
                int column = table.getSelectedColumn();
                while (! table.isCellEditable(row, column) )
                    column += 1;
                    if (column == columnCount)
                        column = 0;
                        row +=1;
                    if (row == rowCount)
                        row = 0;
                    //  Back to where we started, get out.
                    if (row == table.getSelectedRow()
                    &&  column == table.getSelectedColumn())
                        break;
                table.changeSelection(row, column, false, false);
        table.getActionMap().put(im.get(tab), tabAction);
    public static void main(String[] args)
        TableActions frame = new TableActions();
        frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
        frame.pack();
        frame.setLocationRelativeTo( null );
        frame.setVisible(true);
}