KeyListener, ActionListener Demo 1 : Various Event Listener « Event « Java

1. Java
2. Event
3. Various Event Listener

KeyListener, ActionListener Demo 1

  
/*
Definitive Guide to Swing for Java 2, Second Edition
By John Zukowski     
ISBN: 1-893115-78-X
Publisher: APress
*/

import java.awt.AWTEventMulticaster;
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 javax.swing.JFrame;
import javax.swing.JTextField;

public class KeyTextTester {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Key Text Sample");
    KeyTextComponent keyTextComponent = new KeyTextComponent();
    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 KeyTextComponent extends Canvas {
  private ActionListener actionListenerList = null;

  public KeyTextComponent() {
    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);
          actionListenerList.actionPerformed(actionEvent);
        }
      }
    };

    MouseListener internalMouseListener = new MouseAdapter() {
      public void mousePressed(MouseEvent mouseEvent) {
        requestFocus();
      }
    };

    addKeyListener(internalKeyListener);
    addMouseListener(internalMouseListener);
  }

  public void addActionListener(ActionListener actionListener) {
    actionListenerList = AWTEventMulticaster.add(actionListenerList,
        actionListener);
  }

  public void removeActionListener(ActionListener actionListener) {
    actionListenerList = AWTEventMulticaster.remove(actionListenerList,
        actionListener);
  }

  public boolean isFocusTraversable() {
    return true;
  }
}

           
         
    
  

Related examples in the same category

1.	Display the addXXXListener methods of any Swing class
2.	Show events as they happen
3.	A demonstration of the ChangeEvents generated by the BoundedRangeModel
4.	An application that shows the Action class in, well, action
5.	Showing how to add Actions for KeyStrokes
6.	Sketch
7.	EventListenerList enabled Secret Label
8.	TextAction example
9.	StateChange Listener
10.	CheckBox Item Listener
11.	AncestorListener Demo
12.	KeyStroke Sample
13.	Focus Next Component Sample
14.	PropertyChangeListener Sample
15.	Timer Sample
16.	KeyListener, ActionListener Demo 2
17.	Action, Mouse Focus
18.	Swing Action Demo
19.	Load Save Action
20.	Demonstrating the WindowListener with a WindowAdapter
21.	Demonstrating the ActionListener
22.	Demonstrating the AdjustmentListener
23.	Demonstrating the AncestorListener
24.	Demonstrating the ComponentListener
25.	A ComponentAdapter.
26.	JAR Archives: Pack Progress Monitor
27.	A position of a window on the screen.
28.	Using ComponentListener to catch the JFrame Maximization event
29.	Demonstrating the ContainerListener
30.	Demonstrating the FocusListener
31.	Demonstrating the HyperlinkListener
32.	Demonstrating the InternalFrameListener
33.	Demonstrating the ItemListener
34.	Implement a graphical list selection monitor
35.	ItemListener for JRadioButton
36.	Demonstrating the KeyListener
37.	Demonstrating the MenuListener
38.	Demonstrating the MouseListener and MouseMotionListener
39.	Demonstrating the MouseWheelListener
40.	Demonstrating the PopupMenuListener
41.	Demonstrating the WindowListener
42.	implements VetoableChangeListener to block focus change events
43.	Responding to Keystrokes
44.	Focus Event Demo
45.	Container Event Demo
46.	Component Event Demo
47.	Window Event Demo
48.	Handle a window closing event
49.	Installs/resets a ComponentListener to resize the given window to minWidth/Height if needed