Name: mt13159 Date: 07/20/2001


Run the following application. Notice that you can only tab to the
JComponent subclass that has registered a keyboard action. You should
be able to tab to both components.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class JTabOrderTest extends JFrame implements ActionListener
{
    public static void main(String[] args)
    {
        JTabOrderTest test = new JTabOrderTest();
        test.setSize(100,100);
        test.setVisible(true);
    }

    public JTabOrderTest()
    {
        getContentPane().setLayout(new BorderLayout());

        Comp c1 = new Comp();
        KeyStroke s = KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_UP, 0);
        c1.registerKeyboardAction(this, "BUG", s, JComponent.WHEN_FOCUSED);

        getContentPane().add(BorderLayout.WEST, c1);
        getContentPane().add(BorderLayout.EAST, new Comp());
    }

    public void actionPerformed(ActionEvent e)
    {

    }

    private class Comp extends JComponent implements FocusListener
    {
        public Comp()
        {
            addFocusListener(this);
        }

        public void paint(Graphics g)
        {
            if (hasFocus())
                g.setColor(Color.black);
            else
                g.setColor(Color.gray);

            g.drawString("abc", 10, 20);
        }

        public boolean isFocusTraversable()
        {
            return true;
        }

        public Dimension getPreferredSize()
        {
            return new Dimension(50,50);
        }

        public void focusGained(FocusEvent e)
        {
            System.out.println(e);
            repaint();
        }

        public void focusLost(FocusEvent e)
        {
            System.out.println(e);
            repaint();
        }
    }
}
(Review ID: 128464)
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