package java.awt;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;/** * CheckboxMenuItem * * Copyright (c) 1998 *   Transvirtual Technologies Inc., BISS GmbH.  All rights reserved. * * See the file "license.terms" for information on usage and redistribution * of this file. * @author J.H.Mehlitz */public class CheckboxMenuItem  extends MenuItem  implements ItemSelectable{	private boolean isChecked;	private ItemListener iListener;	private static int counter;	final private static long serialVersionUID = 6190621106981774043L;public CheckboxMenuItem () {	this( "", false);}public CheckboxMenuItem ( String label ) {	this( label, false);}public CheckboxMenuItem ( String label, boolean isChecked ) {	super( label);	this.isChecked = isChecked;	setName("chkmenuitem" + counter++);}public void addItemListener( ItemListener newListener) {	iListener = AWTEventMulticaster.add( iListener, newListener);}public Object[] getSelectedObjects () {	// ItemSelectable interface		if ( isChecked ) {		Object[] selItems = new Object[1];		selItems[0] = getLabel();		return selItems;	}	else		return null;}public boolean getState () {	return isChecked;}int getWidth() {	int sw = super.getWidth();	sw += 3*getHeight()/4;	return sw;}public void handleShortcut( MenuShortcut ms) {	if ( (eventMask & AWTEvent.DISABLED_MASK) != 0 )		return;	setState( !isChecked );	if ( (iListener != null) ||	     ( ((eventMask & AWTEvent.ITEM_EVENT_MASK) != 0) || ((flags & IS_OLD_EVENT) > 0) ) ) {		Toolkit.eventQueue.postEvent( ItemEvt.getEvent( this, ItemEvent.ITEM_STATE_CHANGED, getLabel(),                                      isChecked ? ItemEvent.SELECTED : ItemEvent.DESELECTED ));	}}int paint ( Graphics g, int x, int xoff, int y, int width, int height, Color back, Color fore, boolean sel) {	int ih = super.paint( g, x, xoff + 6, y, width, height, back, fore, sel);	int y0 = y + (ih - 8) / 2 + 1;	g.setColor( Defaults.BtnClr);	g.fill3DRect( x+3, y0, 8, 8, !isChecked);	return ih;}public String paramString() {	return super.paramString() + ",state=" + getState();}void process ( ItemEvent ie ) {	if ( (iListener != null) ||	     ((eventMask & (AWTEvent.ITEM_EVENT_MASK|AWTEvent.DISABLED_MASK))	                            == AWTEvent.ITEM_EVENT_MASK) ){		processEvent( ie);	}}protected void processEvent ( AWTEvent e ) {	// same uglyness like in Component.processEvent - we already had it down	// to the specific Event class and now have to go up to AWTEvent again because	// this might be re-implemented by a derived class	if ( e.id ==  ItemEvent.ITEM_STATE_CHANGED ){		processItemEvent( (ItemEvent) e);	}	else {		super.processEvent( e);	}}protected void processItemEvent ( ItemEvent ie ) {	if ( iListener != null ){		iListener.itemStateChanged( ie);	}}public void removeItemListener ( ItemListener listener ) {	iListener = AWTEventMulticaster.remove( iListener, listener);}public synchronized void setState ( boolean isChecked ) {	this.isChecked = isChecked;}}