Back to index...

	/*
	* Copyright (c) 1995, 2013, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/
	package java.awt;

	import java.util.Vector;
	import java.util.Locale;
	import java.util.EventListener;
	import java.awt.peer.ListPeer;
	import java.awt.event.*;
	import java.io.ObjectOutputStream;
	import java.io.ObjectInputStream;
	import java.io.IOException;
	import javax.accessibility.*;


	/**
	* The <code>List</code> component presents the user with a
	* scrolling list of text items. The list can be set up so that
	* the user can choose either one item or multiple items.
	* <p>
	* For example, the code . . .
	*
	* <hr><blockquote><pre>
	* List lst = new List(4, false);
	* lst.add("Mercury");
	* lst.add("Venus");
	* lst.add("Earth");
	* lst.add("JavaSoft");
	* lst.add("Mars");
	* lst.add("Jupiter");
	* lst.add("Saturn");
	* lst.add("Uranus");
	* lst.add("Neptune");
	* lst.add("Pluto");
	* cnt.add(lst);
	* </pre></blockquote><hr>
	* <p>
	* where <code>cnt</code> is a container, produces the following
	* scrolling list:
	* <p>
	* <img src="doc-files/List-1.gif"
	* alt="Shows a list containing: Venus, Earth, JavaSoft, and Mars. Javasoft is selected." style="float:center; margin: 7px 10px;">
	* <p>
	* If the List allows multiple selections, then clicking on
	* an item that is already selected deselects it. In the preceding
	* example, only one item from the scrolling list can be selected
	* at a time, since the second argument when creating the new scrolling
	* list is <code>false</code>. If the List does not allow multiple
	* selections, selecting an item causes any other selected item
	* to be deselected.
	* <p>
	* Note that the list in the example shown was created with four visible
	* rows. Once the list has been created, the number of visible rows
	* cannot be changed. A default <code>List</code> is created with
	* four rows, so that <code>lst = new List()</code> is equivalent to
	* <code>list = new List(4, false)</code>.
	* <p>
	* Beginning with Java 1.1, the Abstract Window Toolkit
	* sends the <code>List</code> object all mouse, keyboard, and focus events
	* that occur over it. (The old AWT event model is being maintained
	* only for backwards compatibility, and its use is discouraged.)
	* <p>
	* When an item is selected or deselected by the user, AWT sends an instance
	* of <code>ItemEvent</code> to the list.
	* When the user double-clicks on an item in a scrolling list,
	* AWT sends an instance of <code>ActionEvent</code> to the
	* list following the item event. AWT also generates an action event
	* when the user presses the return key while an item in the
	* list is selected.
	* <p>
	* If an application wants to perform some action based on an item
	* in this list being selected or activated by the user, it should implement
	* <code>ItemListener</code> or <code>ActionListener</code>
	* as appropriate and register the new listener to receive
	* events from this list.
	* <p>
	* For multiple-selection scrolling lists, it is considered a better
	* user interface to use an external gesture (such as clicking on a
	* button) to trigger the action.
	* @author Sami Shaio
	* @see java.awt.event.ItemEvent
	* @see java.awt.event.ItemListener
	* @see java.awt.event.ActionEvent
	* @see java.awt.event.ActionListener
	* @since JDK1.0
	*/
	public class List extends Component implements ItemSelectable, Accessible {
	/**
	* A vector created to contain items which will become
	* part of the List Component.
	*
	* @serial
	* @see #addItem(String)
	* @see #getItem(int)
	*/
	Vector<String> items = new Vector<>();

	/**
	* This field will represent the number of visible rows in the
	* <code>List</code> Component. It is specified only once, and
	* that is when the list component is actually
	* created. It will never change.
	*
	* @serial
	* @see #getRows()
	*/
	int rows = 0;

	/**
	* <code>multipleMode</code> is a variable that will
	* be set to <code>true</code> if a list component is to be set to
	* multiple selection mode, that is where the user can
	* select more than one item in a list at one time.
	* <code>multipleMode</code> will be set to false if the
	* list component is set to single selection, that is where
	* the user can only select one item on the list at any
	* one time.
	*
	* @serial
	* @see #isMultipleMode()
	* @see #setMultipleMode(boolean)
	*/
	boolean multipleMode = false;

	/**
	* <code>selected</code> is an array that will contain
	* the indices of items that have been selected.
	*
	* @serial
	* @see #getSelectedIndexes()
	* @see #getSelectedIndex()
	*/
	int selected[] = new int[0];

	/**
	* This variable contains the value that will be used
	* when trying to make a particular list item visible.
	*
	* @serial
	* @see #makeVisible(int)
	*/
	int visibleIndex = -1;

	transient ActionListener actionListener;
	transient ItemListener itemListener;

	private static final String base = "list";
	private static int nameCounter = 0;

	/*
	* JDK 1.1 serialVersionUID
	*/
	private static final long serialVersionUID = -3304312411574666869L;

	/**
	* Creates a new scrolling list.
	* By default, there are four visible lines and multiple selections are
	* not allowed. Note that this is a convenience method for
	* <code>List(0, false)</code>. Also note that the number of visible
	* lines in the list cannot be changed after it has been created.
	* @exception HeadlessException if GraphicsEnvironment.isHeadless()
	* returns true.
	* @see java.awt.GraphicsEnvironment#isHeadless
	*/
	public List() throws HeadlessException {
	this(0, false);
	}

	/**
	* Creates a new scrolling list initialized with the specified
	* number of visible lines. By default, multiple selections are
	* not allowed. Note that this is a convenience method for
	* <code>List(rows, false)</code>. Also note that the number
	* of visible rows in the list cannot be changed after it has
	* been created.
	* @param rows the number of items to show.
	* @exception HeadlessException if GraphicsEnvironment.isHeadless()
	* returns true.
	* @see java.awt.GraphicsEnvironment#isHeadless
	* @since JDK1.1
	*/
	public List(int rows) throws HeadlessException {
	this(rows, false);
	}

	/**
	* The default number of visible rows is 4. A list with
	* zero rows is unusable and unsightly.
	*/
	final static int DEFAULT_VISIBLE_ROWS = 4;

	/**
	* Creates a new scrolling list initialized to display the specified
	* number of rows. Note that if zero rows are specified, then
	* the list will be created with a default of four rows.
	* Also note that the number of visible rows in the list cannot
	* be changed after it has been created.
	* If the value of <code>multipleMode</code> is
	* <code>true</code>, then the user can select multiple items from
	* the list. If it is <code>false</code>, only one item at a time
	* can be selected.
	* @param rows the number of items to show.
	* @param multipleMode if <code>true</code>,
	* then multiple selections are allowed;
	* otherwise, only one item can be selected at a time.
	* @exception HeadlessException if GraphicsEnvironment.isHeadless()
	* returns true.
	* @see java.awt.GraphicsEnvironment#isHeadless
	*/
	public List(int rows, boolean multipleMode) throws HeadlessException {
	GraphicsEnvironment.checkHeadless();
	this.rows = (rows != 0) ? rows : DEFAULT_VISIBLE_ROWS;
	this.multipleMode = multipleMode;
	}

	/**
	* Construct a name for this component. Called by
	* <code>getName</code> when the name is <code>null</code>.
	*/
	String constructComponentName() {
	synchronized (List.class) {
	return base + nameCounter++;
	}
	}

	/**
	* Creates the peer for the list. The peer allows us to modify the
	* list's appearance without changing its functionality.
	*/
	public void addNotify() {
	synchronized (getTreeLock()) {
	if (peer == null)
	peer = getToolkit().createList(this);
	super.addNotify();
	}
	}

	/**
	* Removes the peer for this list. The peer allows us to modify the
	* list's appearance without changing its functionality.
	*/
	public void removeNotify() {
	synchronized (getTreeLock()) {
	ListPeer peer = (ListPeer)this.peer;
	if (peer != null) {
	selected = peer.getSelectedIndexes();
	}
	super.removeNotify();
	}
	}

	/**
	* Gets the number of items in the list.
	* @return the number of items in the list
	* @see #getItem
	* @since JDK1.1
	*/
	public int getItemCount() {
	return countItems();
	}

	/**
	* @deprecated As of JDK version 1.1,
	* replaced by <code>getItemCount()</code>.
	*/
	@Deprecated
	public int countItems() {
	return items.size();
	}

	/**
	* Gets the item associated with the specified index.
	* @return an item that is associated with
	* the specified index
	* @param index the position of the item
	* @see #getItemCount
	*/
	public String getItem(int index) {
	return getItemImpl(index);
	}

	// NOTE: This method may be called by privileged threads.
	// We implement this functionality in a package-private method
	// to insure that it cannot be overridden by client subclasses.
	// DO NOT INVOKE CLIENT CODE ON THIS THREAD!
	final String getItemImpl(int index) {
	return items.elementAt(index);
	}

	/**
	* Gets the items in the list.
	* @return a string array containing items of the list
	* @see #select
	* @see #deselect
	* @see #isIndexSelected
	* @since JDK1.1
	*/
	public synchronized String[] getItems() {
	String itemCopies[] = new String[items.size()];
	items.copyInto(itemCopies);
	return itemCopies;
	}

	/**
	* Adds the specified item to the end of scrolling list.
	* @param item the item to be added
	* @since JDK1.1
	*/
	public void add(String item) {
	addItem(item);
	}

	/**
	* @deprecated replaced by <code>add(String)</code>.
	*/
	@Deprecated
	public void addItem(String item) {
	addItem(item, -1);
	}

	/**
	* Adds the specified item to the the scrolling list
	* at the position indicated by the index. The index is
	* zero-based. If the value of the index is less than zero,
	* or if the value of the index is greater than or equal to
	* the number of items in the list, then the item is added
	* to the end of the list.
	* @param item the item to be added;
	* if this parameter is <code>null</code> then the item is
	* treated as an empty string, <code>""</code>
	* @param index the position at which to add the item
	* @since JDK1.1
	*/
	public void add(String item, int index) {
	addItem(item, index);
	}

	/**
	* @deprecated replaced by <code>add(String, int)</code>.
	*/
	@Deprecated
	public synchronized void addItem(String item, int index) {
	if (index < -1 \|\| index >= items.size()) {
	index = -1;
	}

	if (item == null) {
	item = "";
	}

	if (index == -1) {
	items.addElement(item);
	} else {
	items.insertElementAt(item, index);
	}

	ListPeer peer = (ListPeer)this.peer;
	if (peer != null) {
	peer.add(item, index);
	}
	}

	/**
	* Replaces the item at the specified index in the scrolling list
	* with the new string.
	* @param newValue a new string to replace an existing item
	* @param index the position of the item to replace
	* @exception ArrayIndexOutOfBoundsException if <code>index</code>
	* is out of range
	*/
	public synchronized void replaceItem(String newValue, int index) {
	remove(index);
	add(newValue, index);
	}

	/**
	* Removes all items from this list.
	* @see #remove
	* @see #delItems
	* @since JDK1.1
	*/
	public void removeAll() {
	clear();
	}

	/**
	* @deprecated As of JDK version 1.1,
	* replaced by <code>removeAll()</code>.
	*/
	@Deprecated
	public synchronized void clear() {
	ListPeer peer = (ListPeer)this.peer;
	if (peer != null) {
	peer.removeAll();
	}
	items = new Vector<>();
	selected = new int[0];
	}

	/**
	* Removes the first occurrence of an item from the list.
	* If the specified item is selected, and is the only selected
	* item in the list, the list is set to have no selection.
	* @param item the item to remove from the list
	* @exception IllegalArgumentException
	* if the item doesn't exist in the list
	* @since JDK1.1
	*/
	public synchronized void remove(String item) {
	int index = items.indexOf(item);
	if (index < 0) {
	throw new IllegalArgumentException("item " + item +
	" not found in list");
	} else {
	remove(index);
	}
	}

	/**
	* Removes the item at the specified position
	* from this scrolling list.
	* If the item with the specified position is selected, and is the
	* only selected item in the list, the list is set to have no selection.
	* @param position the index of the item to delete
	* @see #add(String, int)
	* @since JDK1.1
	* @exception ArrayIndexOutOfBoundsException
	* if the <code>position</code> is less than 0 or
	* greater than <code>getItemCount()-1</code>
	*/
	public void remove(int position) {
	delItem(position);
	}

	/**
	* @deprecated replaced by <code>remove(String)</code>
	* and <code>remove(int)</code>.
	*/
	@Deprecated
	public void delItem(int position) {
	delItems(position, position);
	}

	/**
	* Gets the index of the selected item on the list,
	*
	* @return the index of the selected item;
	* if no item is selected, or if multiple items are
	* selected, <code>-1</code> is returned.
	* @see #select
	* @see #deselect
	* @see #isIndexSelected
	*/
	public synchronized int getSelectedIndex() {
	int sel[] = getSelectedIndexes();
	return (sel.length == 1) ? sel[0] : -1;
	}

	/**
	* Gets the selected indexes on the list.
	*
	* @return an array of the selected indexes on this scrolling list;
	* if no item is selected, a zero-length array is returned.
	* @see #select
	* @see #deselect
	* @see #isIndexSelected
	*/
	public synchronized int[] getSelectedIndexes() {
	ListPeer peer = (ListPeer)this.peer;
	if (peer != null) {
	selected = peer.getSelectedIndexes();
	}
	return selected.clone();
	}

	/**
	* Gets the selected item on this scrolling list.
	*
	* @return the selected item on the list;
	* if no item is selected, or if multiple items are
	* selected, <code>null</code> is returned.
	* @see #select
	* @see #deselect
	* @see #isIndexSelected
	*/
	public synchronized String getSelectedItem() {
	int index = getSelectedIndex();
	return (index < 0) ? null : getItem(index);
	}

	/**
	* Gets the selected items on this scrolling list.
	*
	* @return an array of the selected items on this scrolling list;
	* if no item is selected, a zero-length array is returned.
	* @see #select
	* @see #deselect
	* @see #isIndexSelected
	*/
	public synchronized String[] getSelectedItems() {
	int sel[] = getSelectedIndexes();
	String str[] = new String[sel.length];
	for (int i = 0 ; i < sel.length ; i++) {
	str[i] = getItem(sel[i]);
	}
	return str;
	}

	/**
	* Gets the selected items on this scrolling list in an array of Objects.
	* @return an array of <code>Object</code>s representing the
	* selected items on this scrolling list;
	* if no item is selected, a zero-length array is returned.
	* @see #getSelectedItems
	* @see ItemSelectable
	*/
	public Object[] getSelectedObjects() {
	return getSelectedItems();
	}

	/**
	* Selects the item at the specified index in the scrolling list.
	*<p>
	* Note that passing out of range parameters is invalid,
	* and will result in unspecified behavior.
	*
	* <p>Note that this method should be primarily used to
	* initially select an item in this component.
	* Programmatically calling this method will <i>not</i> trigger
	* an <code>ItemEvent</code>. The only way to trigger an
	* <code>ItemEvent</code> is by user interaction.
	*
	* @param index the position of the item to select
	* @see #getSelectedItem
	* @see #deselect
	* @see #isIndexSelected
	*/
	public void select(int index) {
	// Bug #4059614: select can't be synchronized while calling the peer,
	// because it is called from the Window Thread. It is sufficient to
	// synchronize the code that manipulates 'selected' except for the
	// case where the peer changes. To handle this case, we simply
	// repeat the selection process.

	ListPeer peer;
	do {
	peer = (ListPeer)this.peer;
	if (peer != null) {
	peer.select(index);
	return;
	}

	synchronized(this)
	{
	boolean alreadySelected = false;

	for (int i = 0 ; i < selected.length ; i++) {
	if (selected[i] == index) {
	alreadySelected = true;
	break;
	}
	}

	if (!alreadySelected) {
	if (!multipleMode) {
	selected = new int[1];
	selected[0] = index;
	} else {
	int newsel[] = new int[selected.length + 1];
	System.arraycopy(selected, 0, newsel, 0,
	selected.length);
	newsel[selected.length] = index;
	selected = newsel;
	}
	}
	}
	} while (peer != this.peer);
	}

	/**
	* Deselects the item at the specified index.
	* <p>
	* Note that passing out of range parameters is invalid,
	* and will result in unspecified behavior.
	* <p>
	* If the item at the specified index is not selected,
	* then the operation is ignored.
	* @param index the position of the item to deselect
	* @see #select
	* @see #getSelectedItem
	* @see #isIndexSelected
	*/
	public synchronized void deselect(int index) {
	ListPeer peer = (ListPeer)this.peer;
	if (peer != null) {
	if (isMultipleMode() \|\| (getSelectedIndex() == index)) {
	peer.deselect(index);
	}
	}

	for (int i = 0 ; i < selected.length ; i++) {
	if (selected[i] == index) {
	int newsel[] = new int[selected.length - 1];
	System.arraycopy(selected, 0, newsel, 0, i);
	System.arraycopy(selected, i+1, newsel, i, selected.length - (i+1));
	selected = newsel;
	return;
	}
	}
	}

	/**
	* Determines if the specified item in this scrolling list is
	* selected.
	* @param index the item to be checked
	* @return <code>true</code> if the specified item has been
	* selected; <code>false</code> otherwise
	* @see #select
	* @see #deselect
	* @since JDK1.1
	*/
	public boolean isIndexSelected(int index) {
	return isSelected(index);
	}

	/**
	* @deprecated As of JDK version 1.1,
	* replaced by <code>isIndexSelected(int)</code>.
	*/
	@Deprecated
	public boolean isSelected(int index) {
	int sel[] = getSelectedIndexes();
	for (int i = 0 ; i < sel.length ; i++) {
	if (sel[i] == index) {
	return true;
	}
	}
	return false;
	}

	/**
	* Gets the number of visible lines in this list. Note that
	* once the <code>List</code> has been created, this number
	* will never change.
	* @return the number of visible lines in this scrolling list
	*/
	public int getRows() {
	return rows;
	}

	/**
	* Determines whether this list allows multiple selections.
	* @return <code>true</code> if this list allows multiple
	* selections; otherwise, <code>false</code>
	* @see #setMultipleMode
	* @since JDK1.1
	*/
	public boolean isMultipleMode() {
	return allowsMultipleSelections();
	}

	/**
	* @deprecated As of JDK version 1.1,
	* replaced by <code>isMultipleMode()</code>.
	*/
	@Deprecated
	public boolean allowsMultipleSelections() {
	return multipleMode;
	}

	/**
	* Sets the flag that determines whether this list
	* allows multiple selections.
	* When the selection mode is changed from multiple-selection to
	* single-selection, the selected items change as follows:
	* If a selected item has the location cursor, only that
	* item will remain selected. If no selected item has the
	* location cursor, all items will be deselected.
	* @param b if <code>true</code> then multiple selections
	* are allowed; otherwise, only one item from
	* the list can be selected at once
	* @see #isMultipleMode
	* @since JDK1.1
	*/
	public void setMultipleMode(boolean b) {
	setMultipleSelections(b);
	}

	/**
	* @deprecated As of JDK version 1.1,
	* replaced by <code>setMultipleMode(boolean)</code>.
	*/
	@Deprecated
	public synchronized void setMultipleSelections(boolean b) {
	if (b != multipleMode) {
	multipleMode = b;
	ListPeer peer = (ListPeer)this.peer;
	if (peer != null) {
	peer.setMultipleMode(b);
	}
	}
	}

	/**
	* Gets the index of the item that was last made visible by
	* the method <code>makeVisible</code>.
	* @return the index of the item that was last made visible
	* @see #makeVisible
	*/
	public int getVisibleIndex() {
	return visibleIndex;
	}

	/**
	* Makes the item at the specified index visible.
	* @param index the position of the item
	* @see #getVisibleIndex
	*/
	public synchronized void makeVisible(int index) {
	visibleIndex = index;
	ListPeer peer = (ListPeer)this.peer;
	if (peer != null) {
	peer.makeVisible(index);
	}
	}

	/**
	* Gets the preferred dimensions for a list with the specified
	* number of rows.
	* @param rows number of rows in the list
	* @return the preferred dimensions for displaying this scrolling list
	* given that the specified number of rows must be visible
	* @see java.awt.Component#getPreferredSize
	* @since JDK1.1
	*/
	public Dimension getPreferredSize(int rows) {
	return preferredSize(rows);
	}

	/**
	* @deprecated As of JDK version 1.1,
	* replaced by <code>getPreferredSize(int)</code>.
	*/
	@Deprecated
	public Dimension preferredSize(int rows) {
	synchronized (getTreeLock()) {
	ListPeer peer = (ListPeer)this.peer;
	return (peer != null) ?
	peer.getPreferredSize(rows) :
	super.preferredSize();
	}
	}

	/**
	* Gets the preferred size of this scrolling list.
	* @return the preferred dimensions for displaying this scrolling list
	* @see java.awt.Component#getPreferredSize
	* @since JDK1.1
	*/
	public Dimension getPreferredSize() {
	return preferredSize();
	}

	/**
	* @deprecated As of JDK version 1.1,
	* replaced by <code>getPreferredSize()</code>.
	*/
	@Deprecated
	public Dimension preferredSize() {
	synchronized (getTreeLock()) {
	return (rows > 0) ?
	preferredSize(rows) :
	super.preferredSize();
	}
	}

	/**
	* Gets the minimum dimensions for a list with the specified
	* number of rows.
	* @param rows number of rows in the list
	* @return the minimum dimensions for displaying this scrolling list
	* given that the specified number of rows must be visible
	* @see java.awt.Component#getMinimumSize
	* @since JDK1.1
	*/
	public Dimension getMinimumSize(int rows) {
	return minimumSize(rows);
	}

	/**
	* @deprecated As of JDK version 1.1,
	* replaced by <code>getMinimumSize(int)</code>.
	*/
	@Deprecated
	public Dimension minimumSize(int rows) {
	synchronized (getTreeLock()) {
	ListPeer peer = (ListPeer)this.peer;
	return (peer != null) ?
	peer.getMinimumSize(rows) :
	super.minimumSize();
	}
	}

	/**
	* Determines the minimum size of this scrolling list.
	* @return the minimum dimensions needed
	* to display this scrolling list
	* @see java.awt.Component#getMinimumSize()
	* @since JDK1.1
	*/
	public Dimension getMinimumSize() {
	return minimumSize();
	}

	/**
	* @deprecated As of JDK version 1.1,
	* replaced by <code>getMinimumSize()</code>.
	*/
	@Deprecated
	public Dimension minimumSize() {
	synchronized (getTreeLock()) {
	return (rows > 0) ? minimumSize(rows) : super.minimumSize();
	}
	}

	/**
	* Adds the specified item listener to receive item events from
	* this list. Item events are sent in response to user input, but not
	* in response to calls to <code>select</code> or <code>deselect</code>.
	* If listener <code>l</code> is <code>null</code>,
	* no exception is thrown and no action is performed.
	* <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
	* >AWT Threading Issues</a> for details on AWT's threading model.
	*
	* @param l the item listener
	* @see #removeItemListener
	* @see #getItemListeners
	* @see #select
	* @see #deselect
	* @see java.awt.event.ItemEvent
	* @see java.awt.event.ItemListener
	* @since JDK1.1
	*/
	public synchronized void addItemListener(ItemListener l) {
	if (l == null) {
	return;
	}
	itemListener = AWTEventMulticaster.add(itemListener, l);
	newEventsOnly = true;
	}

	/**
	* Removes the specified item listener so that it no longer
	* receives item events from this list.
	* If listener <code>l</code> is <code>null</code>,
	* no exception is thrown and no action is performed.
	* <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
	* >AWT Threading Issues</a> for details on AWT's threading model.
	*
	* @param l the item listener
	* @see #addItemListener
	* @see #getItemListeners
	* @see java.awt.event.ItemEvent
	* @see java.awt.event.ItemListener
	* @since JDK1.1
	*/
	public synchronized void removeItemListener(ItemListener l) {
	if (l == null) {
	return;
	}
	itemListener = AWTEventMulticaster.remove(itemListener, l);
	}

	/**
	* Returns an array of all the item listeners
	* registered on this list.
	*
	* @return all of this list's <code>ItemListener</code>s
	* or an empty array if no item
	* listeners are currently registered
	*
	* @see #addItemListener
	* @see #removeItemListener
	* @see java.awt.event.ItemEvent
	* @see java.awt.event.ItemListener
	* @since 1.4
	*/
	public synchronized ItemListener[] getItemListeners() {
	return getListeners(ItemListener.class);
	}

	/**
	* Adds the specified action listener to receive action events from
	* this list. Action events occur when a user double-clicks
	* on a list item or types Enter when the list has the keyboard
	* focus.
	* <p>
	* If listener <code>l</code> is <code>null</code>,
	* no exception is thrown and no action is performed.
	* <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
	* >AWT Threading Issues</a> for details on AWT's threading model.
	*
	* @param l the action listener
	* @see #removeActionListener
	* @see #getActionListeners
	* @see java.awt.event.ActionEvent
	* @see java.awt.event.ActionListener
	* @since JDK1.1
	*/
	public synchronized void addActionListener(ActionListener l) {
	if (l == null) {
	return;
	}
	actionListener = AWTEventMulticaster.add(actionListener, l);
	newEventsOnly = true;
	}

	/**
	* Removes the specified action listener so that it no longer
	* receives action events from this list. Action events
	* occur when a user double-clicks on a list item.
	* If listener <code>l</code> is <code>null</code>,
	* no exception is thrown and no action is performed.
	* <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
	* >AWT Threading Issues</a> for details on AWT's threading model.
	*
	* @param l the action listener
	* @see #addActionListener
	* @see #getActionListeners
	* @see java.awt.event.ActionEvent
	* @see java.awt.event.ActionListener
	* @since JDK1.1
	*/
	public synchronized void removeActionListener(ActionListener l) {
	if (l == null) {
	return;
	}
	actionListener = AWTEventMulticaster.remove(actionListener, l);
	}

	/**
	* Returns an array of all the action listeners
	* registered on this list.
	*
	* @return all of this list's <code>ActionListener</code>s
	* or an empty array if no action
	* listeners are currently registered
	*
	* @see #addActionListener
	* @see #removeActionListener
	* @see java.awt.event.ActionEvent
	* @see java.awt.event.ActionListener
	* @since 1.4
	*/
	public synchronized ActionListener[] getActionListeners() {
	return getListeners(ActionListener.class);
	}

	/**
	* Returns an array of all the objects currently registered
	* as <code><em>Foo</em>Listener</code>s
	* upon this <code>List</code>.
	* <code><em>Foo</em>Listener</code>s are registered using the
	* <code>add<em>Foo</em>Listener</code> method.
	*
	* <p>
	* You can specify the <code>listenerType</code> argument
	* with a class literal, such as
	* <code><em>Foo</em>Listener.class</code>.
	* For example, you can query a
	* <code>List</code> <code>l</code>
	* for its item listeners with the following code:
	*
	* <pre>ItemListener[] ils = (ItemListener[])(l.getListeners(ItemListener.class));</pre>
	*
	* If no such listeners exist, this method returns an empty array.
	*
	* @param listenerType the type of listeners requested; this parameter
	* should specify an interface that descends from
	* <code>java.util.EventListener</code>
	* @return an array of all objects registered as
	* <code><em>Foo</em>Listener</code>s on this list,
	* or an empty array if no such
	* listeners have been added
	* @exception ClassCastException if <code>listenerType</code>
	* doesn't specify a class or interface that implements
	* <code>java.util.EventListener</code>
	*
	* @see #getItemListeners
	* @since 1.3
	*/
	public <T extends EventListener> T[] getListeners(Class<T> listenerType) {
	EventListener l = null;
	if (listenerType == ActionListener.class) {
	l = actionListener;
	} else if (listenerType == ItemListener.class) {
	l = itemListener;
	} else {
	return super.getListeners(listenerType);
	}
	return AWTEventMulticaster.getListeners(l, listenerType);
	}

	// REMIND: remove when filtering is done at lower level
	boolean eventEnabled(AWTEvent e) {
	switch(e.id) {
	case ActionEvent.ACTION_PERFORMED:
	if ((eventMask & AWTEvent.ACTION_EVENT_MASK) != 0 \|\|
	actionListener != null) {
	return true;
	}
	return false;
	case ItemEvent.ITEM_STATE_CHANGED:
	if ((eventMask & AWTEvent.ITEM_EVENT_MASK) != 0 \|\|
	itemListener != null) {
	return true;
	}
	return false;
	default:
	break;
	}
	return super.eventEnabled(e);
	}

	/**
	* Processes events on this scrolling list. If an event is
	* an instance of <code>ItemEvent</code>, it invokes the
	* <code>processItemEvent</code> method. Else, if the
	* event is an instance of <code>ActionEvent</code>,
	* it invokes <code>processActionEvent</code>.
	* If the event is not an item event or an action event,
	* it invokes <code>processEvent</code> on the superclass.
	* <p>Note that if the event parameter is <code>null</code>
	* the behavior is unspecified and may result in an
	* exception.
	*
	* @param e the event
	* @see java.awt.event.ActionEvent
	* @see java.awt.event.ItemEvent
	* @see #processActionEvent
	* @see #processItemEvent
	* @since JDK1.1
	*/
	protected void processEvent(AWTEvent e) {
	if (e instanceof ItemEvent) {
	processItemEvent((ItemEvent)e);
	return;
	} else if (e instanceof ActionEvent) {
	processActionEvent((ActionEvent)e);
	return;
	}
	super.processEvent(e);
	}

	/**
	* Processes item events occurring on this list by
	* dispatching them to any registered
	* <code>ItemListener</code> objects.
	* <p>
	* This method is not called unless item events are
	* enabled for this component. Item events are enabled
	* when one of the following occurs:
	* <ul>
	* <li>An <code>ItemListener</code> object is registered
	* via <code>addItemListener</code>.
	* <li>Item events are enabled via <code>enableEvents</code>.
	* </ul>
	* <p>Note that if the event parameter is <code>null</code>
	* the behavior is unspecified and may result in an
	* exception.
	*
	* @param e the item event
	* @see java.awt.event.ItemEvent
	* @see java.awt.event.ItemListener
	* @see #addItemListener
	* @see java.awt.Component#enableEvents
	* @since JDK1.1
	*/
	protected void processItemEvent(ItemEvent e) {
	ItemListener listener = itemListener;
	if (listener != null) {
	listener.itemStateChanged(e);
	}
	}

	/**
	* Processes action events occurring on this component
	* by dispatching them to any registered
	* <code>ActionListener</code> objects.
	* <p>
	* This method is not called unless action events are
	* enabled for this component. Action events are enabled
	* when one of the following occurs:
	* <ul>
	* <li>An <code>ActionListener</code> object is registered
	* via <code>addActionListener</code>.
	* <li>Action events are enabled via <code>enableEvents</code>.
	* </ul>
	* <p>Note that if the event parameter is <code>null</code>
	* the behavior is unspecified and may result in an
	* exception.
	*
	* @param e the action event
	* @see java.awt.event.ActionEvent
	* @see java.awt.event.ActionListener
	* @see #addActionListener
	* @see java.awt.Component#enableEvents
	* @since JDK1.1
	*/
	protected void processActionEvent(ActionEvent e) {
	ActionListener listener = actionListener;
	if (listener != null) {
	listener.actionPerformed(e);
	}
	}

	/**
	* Returns the parameter string representing the state of this
	* scrolling list. This string is useful for debugging.
	* @return the parameter string of this scrolling list
	*/
	protected String paramString() {
	return super.paramString() + ",selected=" + getSelectedItem();
	}

	/**
	* @deprecated As of JDK version 1.1,
	* Not for public use in the future.
	* This method is expected to be retained only as a package
	* private method.
	*/
	@Deprecated
	public synchronized void delItems(int start, int end) {
	for (int i = end; i >= start; i--) {
	items.removeElementAt(i);
	}
	ListPeer peer = (ListPeer)this.peer;
	if (peer != null) {
	peer.delItems(start, end);
	}
	}

	/*
	* Serialization support. Since the value of the selected
	* field isn't necessarily up to date, we sync it up with the
	* peer before serializing.
	*/

	/**
	* The <code>List</code> component's
	* Serialized Data Version.
	*
	* @serial
	*/
	private int listSerializedDataVersion = 1;

	/**
	* Writes default serializable fields to stream. Writes
	* a list of serializable <code>ItemListeners</code>
	* and <code>ActionListeners</code> as optional data.
	* The non-serializable listeners are detected and
	* no attempt is made to serialize them.
	*
	* @serialData <code>null</code> terminated sequence of 0
	* or more pairs; the pair consists of a <code>String</code>
	* and an <code>Object</code>; the <code>String</code>
	* indicates the type of object and is one of the
	* following:
	* <code>itemListenerK</code> indicating an
	* <code>ItemListener</code> object;
	* <code>actionListenerK</code> indicating an
	* <code>ActionListener</code> object
	*
	* @param s the <code>ObjectOutputStream</code> to write
	* @see AWTEventMulticaster#save(ObjectOutputStream, String, EventListener)
	* @see java.awt.Component#itemListenerK
	* @see java.awt.Component#actionListenerK
	* @see #readObject(ObjectInputStream)
	*/
	private void writeObject(ObjectOutputStream s)
	throws IOException
	{
	synchronized (this) {
	ListPeer peer = (ListPeer)this.peer;
	if (peer != null) {
	selected = peer.getSelectedIndexes();
	}
	}
	s.defaultWriteObject();

	AWTEventMulticaster.save(s, itemListenerK, itemListener);
	AWTEventMulticaster.save(s, actionListenerK, actionListener);
	s.writeObject(null);
	}

	/**
	* Reads the <code>ObjectInputStream</code> and if it
	* isn't <code>null</code> adds a listener to receive
	* both item events and action events (as specified
	* by the key stored in the stream) fired by the
	* <code>List</code>.
	* Unrecognized keys or values will be ignored.
	*
	* @param s the <code>ObjectInputStream</code> to write
	* @exception HeadlessException if
	* <code>GraphicsEnvironment.isHeadless</code> returns
	* <code>true</code>
	* @see #removeItemListener(ItemListener)
	* @see #addItemListener(ItemListener)
	* @see java.awt.GraphicsEnvironment#isHeadless
	* @see #writeObject(ObjectOutputStream)
	*/
	private void readObject(ObjectInputStream s)
	throws ClassNotFoundException, IOException, HeadlessException
	{
	GraphicsEnvironment.checkHeadless();
	s.defaultReadObject();

	Object keyOrNull;
	while(null != (keyOrNull = s.readObject())) {
	String key = ((String)keyOrNull).intern();

	if (itemListenerK == key)
	addItemListener((ItemListener)(s.readObject()));

	else if (actionListenerK == key)
	addActionListener((ActionListener)(s.readObject()));

	else // skip value for unrecognized key
	s.readObject();
	}
	}


	/////////////////
	// Accessibility support
	////////////////


	/**
	* Gets the <code>AccessibleContext</code> associated with this
	* <code>List</code>. For lists, the <code>AccessibleContext</code>
	* takes the form of an <code>AccessibleAWTList</code>.
	* A new <code>AccessibleAWTList</code> instance is created, if necessary.
	*
	* @return an <code>AccessibleAWTList</code> that serves as the
	* <code>AccessibleContext</code> of this <code>List</code>
	* @since 1.3
	*/
	public AccessibleContext getAccessibleContext() {
	if (accessibleContext == null) {
	accessibleContext = new AccessibleAWTList();
	}
	return accessibleContext;
	}

	/**
	* This class implements accessibility support for the
	* <code>List</code> class. It provides an implementation of the
	* Java Accessibility API appropriate to list user-interface elements.
	* @since 1.3
	*/
	protected class AccessibleAWTList extends AccessibleAWTComponent
	implements AccessibleSelection, ItemListener, ActionListener
	{
	/*
	* JDK 1.3 serialVersionUID
	*/
	private static final long serialVersionUID = 7924617370136012829L;

	public AccessibleAWTList() {
	super();
	List.this.addActionListener(this);
	List.this.addItemListener(this);
	}

	public void actionPerformed(ActionEvent event) {
	}

	public void itemStateChanged(ItemEvent event) {
	}

	/**
	* Get the state set of this object.
	*
	* @return an instance of AccessibleState containing the current state
	* of the object
	* @see AccessibleState
	*/
	public AccessibleStateSet getAccessibleStateSet() {
	AccessibleStateSet states = super.getAccessibleStateSet();
	if (List.this.isMultipleMode()) {
	states.add(AccessibleState.MULTISELECTABLE);
	}
	return states;
	}

	/**
	* Get the role of this object.
	*
	* @return an instance of AccessibleRole describing the role of the
	* object
	* @see AccessibleRole
	*/
	public AccessibleRole getAccessibleRole() {
	return AccessibleRole.LIST;
	}

	/**
	* Returns the Accessible child contained at the local coordinate
	* Point, if one exists.
	*
	* @return the Accessible at the specified location, if it exists
	*/
	public Accessible getAccessibleAt(Point p) {
	return null; // fredxFIXME Not implemented yet
	}

	/**
	* Returns the number of accessible children in the object. If all
	* of the children of this object implement Accessible, than this
	* method should return the number of children of this object.
	*
	* @return the number of accessible children in the object.
	*/
	public int getAccessibleChildrenCount() {
	return List.this.getItemCount();
	}

	/**
	* Return the nth Accessible child of the object.
	*
	* @param i zero-based index of child
	* @return the nth Accessible child of the object
	*/
	public Accessible getAccessibleChild(int i) {
	synchronized(List.this) {
	if (i >= List.this.getItemCount()) {
	return null;
	} else {
	return new AccessibleAWTListChild(List.this, i);
	}
	}
	}

	/**
	* Get the AccessibleSelection associated with this object. In the
	* implementation of the Java Accessibility API for this class,
	* return this object, which is responsible for implementing the
	* AccessibleSelection interface on behalf of itself.
	*
	* @return this object
	*/
	public AccessibleSelection getAccessibleSelection() {
	return this;
	}

	// AccessibleSelection methods

	/**
	* Returns the number of items currently selected.
	* If no items are selected, the return value will be 0.
	*
	* @return the number of items currently selected.
	*/
	public int getAccessibleSelectionCount() {
	return List.this.getSelectedIndexes().length;
	}

	/**
	* Returns an Accessible representing the specified selected item
	* in the object. If there isn't a selection, or there are
	* fewer items selected than the integer passed in, the return
	* value will be null.
	*
	* @param i the zero-based index of selected items
	* @return an Accessible containing the selected item
	*/
	public Accessible getAccessibleSelection(int i) {
	synchronized(List.this) {
	int len = getAccessibleSelectionCount();
	if (i < 0 \|\| i >= len) {
	return null;
	} else {
	return getAccessibleChild(List.this.getSelectedIndexes()[i]);
	}
	}
	}

	/**
	* Returns true if the current child of this object is selected.
	*
	* @param i the zero-based index of the child in this Accessible
	* object.
	* @see AccessibleContext#getAccessibleChild
	*/
	public boolean isAccessibleChildSelected(int i) {
	return List.this.isIndexSelected(i);
	}

	/**
	* Adds the specified selected item in the object to the object's
	* selection. If the object supports multiple selections,
	* the specified item is added to any existing selection, otherwise
	* it replaces any existing selection in the object. If the
	* specified item is already selected, this method has no effect.
	*
	* @param i the zero-based index of selectable items
	*/
	public void addAccessibleSelection(int i) {
	List.this.select(i);
	}

	/**
	* Removes the specified selected item in the object from the object's
	* selection. If the specified item isn't currently selected, this
	* method has no effect.
	*
	* @param i the zero-based index of selectable items
	*/
	public void removeAccessibleSelection(int i) {
	List.this.deselect(i);
	}

	/**
	* Clears the selection in the object, so that nothing in the
	* object is selected.
	*/
	public void clearAccessibleSelection() {
	synchronized(List.this) {
	int selectedIndexes[] = List.this.getSelectedIndexes();
	if (selectedIndexes == null)
	return;
	for (int i = selectedIndexes.length - 1; i >= 0; i--) {
	List.this.deselect(selectedIndexes[i]);
	}
	}
	}

	/**
	* Causes every selected item in the object to be selected
	* if the object supports multiple selections.
	*/
	public void selectAllAccessibleSelection() {
	synchronized(List.this) {
	for (int i = List.this.getItemCount() - 1; i >= 0; i--) {
	List.this.select(i);
	}
	}
	}

	/**
	* This class implements accessibility support for
	* List children. It provides an implementation of the
	* Java Accessibility API appropriate to list children
	* user-interface elements.
	* @since 1.3
	*/
	protected class AccessibleAWTListChild extends AccessibleAWTComponent
	implements Accessible
	{
	/*
	* JDK 1.3 serialVersionUID
	*/
	private static final long serialVersionUID = 4412022926028300317L;

	// [[[FIXME]]] need to finish implementing this!!!

	private List parent;
	private int indexInParent;

	public AccessibleAWTListChild(List parent, int indexInParent) {
	this.parent = parent;
	this.setAccessibleParent(parent);
	this.indexInParent = indexInParent;
	}

	//
	// required Accessible methods
	//
	/**
	* Gets the AccessibleContext for this object. In the
	* implementation of the Java Accessibility API for this class,
	* return this object, which acts as its own AccessibleContext.
	*
	* @return this object
	*/
	public AccessibleContext getAccessibleContext() {
	return this;
	}

	//
	// required AccessibleContext methods
	//

	/**
	* Get the role of this object.
	*
	* @return an instance of AccessibleRole describing the role of
	* the object
	* @see AccessibleRole
	*/
	public AccessibleRole getAccessibleRole() {
	return AccessibleRole.LIST_ITEM;
	}

	/**
	* Get the state set of this object. The AccessibleStateSet of an
	* object is composed of a set of unique AccessibleState's. A
	* change in the AccessibleStateSet of an object will cause a
	* PropertyChangeEvent to be fired for the
	* ACCESSIBLE_STATE_PROPERTY property.
	*
	* @return an instance of AccessibleStateSet containing the
	* current state set of the object
	* @see AccessibleStateSet
	* @see AccessibleState
	* @see #addPropertyChangeListener
	*/
	public AccessibleStateSet getAccessibleStateSet() {
	AccessibleStateSet states = super.getAccessibleStateSet();
	if (parent.isIndexSelected(indexInParent)) {
	states.add(AccessibleState.SELECTED);
	}
	return states;
	}

	/**
	* Gets the locale of the component. If the component does not
	* have a locale, then the locale of its parent is returned.
	*
	* @return This component's locale. If this component does not have
	* a locale, the locale of its parent is returned.
	*
	* @exception IllegalComponentStateException
	* If the Component does not have its own locale and has not yet
	* been added to a containment hierarchy such that the locale can
	* be determined from the containing parent.
	*/
	public Locale getLocale() {
	return parent.getLocale();
	}

	/**
	* Get the 0-based index of this object in its accessible parent.
	*
	* @return the 0-based index of this object in its parent; -1 if
	* this object does not have an accessible parent.
	*
	* @see #getAccessibleParent
	* @see #getAccessibleChildrenCount
	* @see #getAccessibleChild
	*/
	public int getAccessibleIndexInParent() {
	return indexInParent;
	}

	/**
	* Returns the number of accessible children of the object.
	*
	* @return the number of accessible children of the object.
	*/
	public int getAccessibleChildrenCount() {
	return 0; // list elements can't have children
	}

	/**
	* Return the specified Accessible child of the object. The
	* Accessible children of an Accessible object are zero-based,
	* so the first child of an Accessible child is at index 0, the
	* second child is at index 1, and so on.
	*
	* @param i zero-based index of child
	* @return the Accessible child of the object
	* @see #getAccessibleChildrenCount
	*/
	public Accessible getAccessibleChild(int i) {
	return null; // list elements can't have children
	}


	//
	// AccessibleComponent delegatation to parent List
	//

	/**
	* Get the background color of this object.
	*
	* @return the background color, if supported, of the object;
	* otherwise, null
	* @see #setBackground
	*/
	public Color getBackground() {
	return parent.getBackground();
	}

	/**
	* Set the background color of this object.
	*
	* @param c the new Color for the background
	* @see #setBackground
	*/
	public void setBackground(Color c) {
	parent.setBackground(c);
	}

	/**
	* Get the foreground color of this object.
	*
	* @return the foreground color, if supported, of the object;
	* otherwise, null
	* @see #setForeground
	*/
	public Color getForeground() {
	return parent.getForeground();
	}

	/**
	* Set the foreground color of this object.
	*
	* @param c the new Color for the foreground
	* @see #getForeground
	*/
	public void setForeground(Color c) {
	parent.setForeground(c);
	}

	/**
	* Get the Cursor of this object.
	*
	* @return the Cursor, if supported, of the object; otherwise, null
	* @see #setCursor
	*/
	public Cursor getCursor() {
	return parent.getCursor();
	}

	/**
	* Set the Cursor of this object.
	* <p>
	* The method may have no visual effect if the Java platform
	* implementation and/or the native system do not support
	* changing the mouse cursor shape.
	* @param cursor the new Cursor for the object
	* @see #getCursor
	*/
	public void setCursor(Cursor cursor) {
	parent.setCursor(cursor);
	}

	/**
	* Get the Font of this object.
	*
	* @return the Font,if supported, for the object; otherwise, null
	* @see #setFont
	*/
	public Font getFont() {
	return parent.getFont();
	}

	/**
	* Set the Font of this object.
	*
	* @param f the new Font for the object
	* @see #getFont
	*/
	public void setFont(Font f) {
	parent.setFont(f);
	}

	/**
	* Get the FontMetrics of this object.
	*
	* @param f the Font
	* @return the FontMetrics, if supported, the object; otherwise, null
	* @see #getFont
	*/
	public FontMetrics getFontMetrics(Font f) {
	return parent.getFontMetrics(f);
	}

	/**
	* Determine if the object is enabled. Objects that are enabled
	* will also have the AccessibleState.ENABLED state set in their
	* AccessibleStateSet.
	*
	* @return true if object is enabled; otherwise, false
	* @see #setEnabled
	* @see AccessibleContext#getAccessibleStateSet
	* @see AccessibleState#ENABLED
	* @see AccessibleStateSet
	*/
	public boolean isEnabled() {
	return parent.isEnabled();
	}

	/**
	* Set the enabled state of the object.
	*
	* @param b if true, enables this object; otherwise, disables it
	* @see #isEnabled
	*/
	public void setEnabled(boolean b) {
	parent.setEnabled(b);
	}

	/**
	* Determine if the object is visible. Note: this means that the
	* object intends to be visible; however, it may not be
	* showing on the screen because one of the objects that this object
	* is contained by is currently not visible. To determine if an
	* object is showing on the screen, use isShowing().
	* <p>Objects that are visible will also have the
	* AccessibleState.VISIBLE state set in their AccessibleStateSet.
	*
	* @return true if object is visible; otherwise, false
	* @see #setVisible
	* @see AccessibleContext#getAccessibleStateSet
	* @see AccessibleState#VISIBLE
	* @see AccessibleStateSet
	*/
	public boolean isVisible() {
	// [[[FIXME]]] needs to work like isShowing() below
	return false;
	// return parent.isVisible();
	}

	/**
	* Set the visible state of the object.
	*
	* @param b if true, shows this object; otherwise, hides it
	* @see #isVisible
	*/
	public void setVisible(boolean b) {
	// [[[FIXME]]] should scroll to item to make it show!
	parent.setVisible(b);
	}

	/**
	* Determine if the object is showing. This is determined by
	* checking the visibility of the object and visibility of the
	* object ancestors.
	* Note: this will return true even if the object is obscured
	* by another (for example, it to object is underneath a menu
	* that was pulled down).
	*
	* @return true if object is showing; otherwise, false
	*/
	public boolean isShowing() {
	// [[[FIXME]]] only if it's showing!!!
	return false;
	// return parent.isShowing();
	}

	/**
	* Checks whether the specified point is within this object's
	* bounds, where the point's x and y coordinates are defined to
	* be relative to the coordinate system of the object.
	*
	* @param p the Point relative to the coordinate system of the
	* object
	* @return true if object contains Point; otherwise false
	* @see #getBounds
	*/
	public boolean contains(Point p) {
	// [[[FIXME]]] - only if p is within the list element!!!
	return false;
	// return parent.contains(p);
	}

	/**
	* Returns the location of the object on the screen.
	*
	* @return location of object on screen; null if this object
	* is not on the screen
	* @see #getBounds
	* @see #getLocation
	*/
	public Point getLocationOnScreen() {
	// [[[FIXME]]] sigh
	return null;
	}

	/**
	* Gets the location of the object relative to the parent in the
	* form of a point specifying the object's top-left corner in the
	* screen's coordinate space.
	*
	* @return An instance of Point representing the top-left corner of
	* the objects's bounds in the coordinate space of the screen; null
	* if this object or its parent are not on the screen
	* @see #getBounds
	* @see #getLocationOnScreen
	*/
	public Point getLocation() {
	// [[[FIXME]]]
	return null;
	}

	/**
	* Sets the location of the object relative to the parent.
	* @param p the new position for the top-left corner
	* @see #getLocation
	*/
	public void setLocation(Point p) {
	// [[[FIXME]]] maybe - can simply return as no-op
	}

	/**
	* Gets the bounds of this object in the form of a Rectangle object.
	* The bounds specify this object's width, height, and location
	* relative to its parent.
	*
	* @return A rectangle indicating this component's bounds; null if
	* this object is not on the screen.
	* @see #contains
	*/
	public Rectangle getBounds() {
	// [[[FIXME]]]
	return null;
	}

	/**
	* Sets the bounds of this object in the form of a Rectangle
	* object. The bounds specify this object's width, height, and
	* location relative to its parent.
	*
	* @param r rectangle indicating this component's bounds
	* @see #getBounds
	*/
	public void setBounds(Rectangle r) {
	// no-op; not supported
	}

	/**
	* Returns the size of this object in the form of a Dimension
	* object. The height field of the Dimension object contains this
	* objects's height, and the width field of the Dimension object
	* contains this object's width.
	*
	* @return A Dimension object that indicates the size of this
	* component; null if this object is not on the screen
	* @see #setSize
	*/
	public Dimension getSize() {
	// [[[FIXME]]]
	return null;
	}

	/**
	* Resizes this object so that it has width and height.
	*
	* @param d - The dimension specifying the new size of the object.
	* @see #getSize
	*/
	public void setSize(Dimension d) {
	// not supported; no-op
	}

	/**
	* Returns the <code>Accessible</code> child, if one exists,
	* contained at the local coordinate <code>Point</code>.
	*
	* @param p the point relative to the coordinate system of this
	* object
	* @return the <code>Accessible</code>, if it exists,
	* at the specified location; otherwise <code>null</code>
	*/
	public Accessible getAccessibleAt(Point p) {
	return null; // object cannot have children!
	}

	/**
	* Returns whether this object can accept focus or not. Objects
	* that can accept focus will also have the
	* <code>AccessibleState.FOCUSABLE</code> state set in their
	* <code>AccessibleStateSet</code>.
	*
	* @return true if object can accept focus; otherwise false
	* @see AccessibleContext#getAccessibleStateSet
	* @see AccessibleState#FOCUSABLE
	* @see AccessibleState#FOCUSED
	* @see AccessibleStateSet
	*/
	public boolean isFocusTraversable() {
	return false; // list element cannot receive focus!
	}

	/**
	* Requests focus for this object. If this object cannot accept
	* focus, nothing will happen. Otherwise, the object will attempt
	* to take focus.
	* @see #isFocusTraversable
	*/
	public void requestFocus() {
	// nothing to do; a no-op
	}

	/**
	* Adds the specified focus listener to receive focus events from
	* this component.
	*
	* @param l the focus listener
	* @see #removeFocusListener
	*/
	public void addFocusListener(FocusListener l) {
	// nothing to do; a no-op
	}

	/**
	* Removes the specified focus listener so it no longer receives
	* focus events from this component.
	*
	* @param l the focus listener
	* @see #addFocusListener
	*/
	public void removeFocusListener(FocusListener l) {
	// nothing to do; a no-op
	}



	} // inner class AccessibleAWTListChild

	} // inner class AccessibleAWTList

	}

Back to index...