/*
Definitive Guide to Swing for Java 2, Second Edition
By John Zukowski
ISBN: 1-893115-78-X
Publisher: APress
*/
import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.EventListener;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.event.EventListenerList;
public class KeyTextTester2 {
public static void main(String args[]) {
JFrame frame = new JFrame("Key Text Sample");
KeyTextComponent2 keyTextComponent = new KeyTextComponent2();
final JTextField textField = new JTextField();
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
String keyText = actionEvent.getActionCommand();
textField.setText(keyText);
}
};
keyTextComponent.addActionListener(actionListener);
Container contentPane = frame.getContentPane();
contentPane.add(keyTextComponent, BorderLayout.CENTER);
contentPane.add(textField, BorderLayout.SOUTH);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
class KeyTextComponent2 extends Canvas {
private EventListenerList actionListenerList = new EventListenerList();
public KeyTextComponent2() {
setBackground(Color.cyan);
KeyListener internalKeyListener = new KeyAdapter() {
public void keyPressed(KeyEvent keyEvent) {
if (actionListenerList != null) {
int keyCode = keyEvent.getKeyCode();
String keyText = KeyEvent.getKeyText(keyCode);
ActionEvent actionEvent = new ActionEvent(this,
ActionEvent.ACTION_PERFORMED, keyText);
fireActionPerformed(actionEvent);
}
}
};
MouseListener internalMouseListener = new MouseAdapter() {
public void mousePressed(MouseEvent mouseEvent) {
requestFocus();
}
};
addKeyListener(internalKeyListener);
addMouseListener(internalMouseListener);
}
public void addActionListener(ActionListener actionListener) {
actionListenerList.add(ActionListener.class, actionListener);
}
public void removeActionListener(ActionListener actionListener) {
actionListenerList.remove(ActionListener.class, actionListener);
}
protected void fireActionPerformed(ActionEvent actionEvent) {
EventListener listenerList[] = actionListenerList
.getListeners(ActionListener.class);
for (int i = 0, n = listenerList.length; i < n; i++) {
((ActionListener) listenerList[i]).actionPerformed(actionEvent);
}
}
public boolean isFocusTraversable() {
return true;
}
}