Name: dbT83986 Date: 01/14/99


If you double-click on a disabled JTextField, the contents of
the last focussed JTextField are selected.

BeginWordAction is called with Event==null, which causes the
subsequent TextAction.getTextComponent() to return not the
component from the event (which is null), but to call
getFocusedComponent() which returns the last TextComponent,
which had focus before. Which in the example is "Field 1".


--------------------------------------
o The program shows two JTextFields and a JButton.
o The button "Toggle Enabled" toggles setEnabled() on both buttons.
o Press the button, now you can input something in both fields.
o Input something in the upper textfield.
o Press the button again, now both fields are disabled.
o If you now double-click the lower (still empty) textfield,
  the content of the upper textfield gets selected.

import javax.swing.*;
import javax.swing.text.*;

import java.awt.*;
import java.awt.event.*;
import java.util.Vector;

public class T02
implements ActionListener
{

JTextField tf1, tf2;
JButton b;

    public T02()
{
        JFrame frame = new JFrame("B038.T02");

        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
System.out.println("Window closing.");
System.exit(0);}});

Container cont = frame.getContentPane();
cont.setLayout(new BoxLayout(cont, BoxLayout.Y_AXIS));

tf1 = new JTextField(20);
tf1.setEnabled(false);
tf1.setName("Field 1");
cont.add(tf1);

tf2 = new JTextField(20);
tf2.setEnabled(false);
tf2.setName("Field 2");
cont.add(tf2);

b = new JButton("Toggle Enabled");
cont.add(b);
b.addActionListener(this);

        frame.pack();
        frame.setVisible(true);
    }
    
    public static void main(String[] args)
{
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (Exception ex) {
System.out.println("cannot set LookAndFeel: "+ex);
//System.exit(0);
}
        new T02();
    }

public void actionPerformed(ActionEvent ev)
{
if (ev.getSource() == b) {
boolean b = tf1.isEnabled();
tf1.setEnabled(! b);
tf2.setEnabled(! b);
}
}
}
(Review ID: 52529)
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