import java.awt.*;
import java.awt.event.*;

public class ActionSource extends java.awt.Canvas
					   implements ActionListener, ItemListener,
								  KeyListener, MouseListener {

protected ActionListener actionListenerChain = null;

//-------------------------------------------------------------------
// ActionSource Constructor
//-------------------------------------------------------------------
public ActionSource() {
	// empty
}
//-------------------------------------------------------------------
// ActionListener management methods
//-------------------------------------------------------------------
public void addActionListener(ActionListener listener) {
    actionListenerChain = AWTEventMulticaster.add(actionListenerChain, listener);
}
public void removeActionListener(ActionListener listener) {
    actionListenerChain = AWTEventMulticaster.remove(actionListenerChain, listener);
}
//-------------------------------------------------------------------
public void fireEvent() {
ActionEvent action;

	action = new ActionEvent(this, 0, "Action from ActionSource");

	actionListenerChain.actionPerformed(action);
}
//-------------------------------------------------------------------
// ActionListener interface methods
//-------------------------------------------------------------------
public void actionPerformed(ActionEvent actionEvent) {
	fireEvent();
}
//-------------------------------------------------------------------
// ItemListener interface methods
//-------------------------------------------------------------------
public void itemStateChanged(ItemEvent itemEvent) {
	fireEvent();
}
//-------------------------------------------------------------------
// KeyListener interface methods
//-------------------------------------------------------------------
public void keyTyped	 (KeyEvent keyEvent) { fireEvent(); }
public void keyPressed	 (KeyEvent keyEvent) { fireEvent(); }
public void keyReleased	 (KeyEvent keyEvent) { fireEvent(); }
//-------------------------------------------------------------------
// MouseListener interface methods
//-------------------------------------------------------------------
public void mouseClicked (MouseEvent mouseEvent) { fireEvent(); }
public void mousePressed (MouseEvent mouseEvent) { fireEvent(); }
public void mouseReleased(MouseEvent mouseEvent) { fireEvent(); }
public void mouseEntered (MouseEvent mouseEvent) { fireEvent(); }
public void mouseExited  (MouseEvent mouseEvent) { fireEvent(); }
} // End of Class ActionSource