package java.awt;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import java.util.Vector;/** * class Choice -  * * Copyright (c) 1999 *      Transvirtual Technologies, Inc.  All rights reserved. * * See the file "license.terms" for information on usage and redistribution * of this file. */public class Choice  extends NativeComponent  implements ItemSelectable{	ItemListener iListener;	Vector items = new Vector();	int selection = -1;public Choice() {}public void add( String item) {	insert( item, -1);}public void addItem( String item) {	insert( item, -1);}public void addItemListener( ItemListener l) {	iListener = AWTEventMulticaster.add( iListener, l);}public void addNotify() {	if ( nativeData == null ) {		Toolkit.createNative(this);		super.addNotify();		updateItems();	}}void createNative() {	nativeData = Toolkit.choiceCreateChoice(getParentData());}public String getItem( int idx) {	return (String)items.elementAt( idx);}public int getItemCount() {	return items.size();}public Dimension getPreferredSize() {	FontMetrics fm = getFontMetrics( getFont() );	return new Dimension( 100, fm.getHeight() + 6);}public int getSelectedIndex() {	return selection;}public String getSelectedItem() {	if ( selection == -1 )		return null;	return (String)items.elementAt( selection);}public Object[] getSelectedObjects() {	Object[] so = { null };	if ( selection > -1 )		so[0] = items.elementAt( selection);	return so;}public void insert( String item, int idx) {	if ( idx == -1 ) {		items.addElement( item);	}	else {		items.insertElementAt( item, idx);	}	updateItems();}protected String paramString() {	return super.paramString();}void process ( ItemEvent e ) {	int idx = ((Integer)e.getItem()).intValue();	Object o = items.elementAt( idx);	switch ( e.getStateChange() ) {	case ItemEvent.SELECTED:		selection = idx;		break;    	}	if ( (iListener != null) || (eventMask & AWTEvent.ITEM_EVENT_MASK) != 0){		processEvent( e);    	}	    	if ( (flags & IS_OLD_EVENT) != 0 ) postEvent( Event.getEvent( e));}protected void processItemEvent( ItemEvent e) {	if ( iListener != null )		iListener.itemStateChanged( e);}public void remove( String item) {	remove( items.indexOf( item));}public void remove( int idx) {	items.removeElementAt( idx);	if ( selection == idx )		selection = -1;	updateItems();}public void removeAll() {	items.removeAllElements();	selection = -1;	updateItems();}public void removeItemListener( ItemListener l) {	iListener = AWTEventMulticaster.remove( iListener, l);}public void select( String item) {	select( items.indexOf( item));}public void select( int idx) {	selection = idx;	if ( nativeData != null )		Toolkit.choiceSelectItem( nativeData, idx);}void updateItems() {	if ( nativeData != null ) {		Toolkit.choiceRemoveAll( nativeData);		for ( int i=0; i<items.size(); i++)			Toolkit.choiceAppendItem( nativeData, (String)items.elementAt( i));		select( 0);	}}}