My first initial commit with all of mine experimental changes.

Dmitry Kabak (userdima committed 13 years ago

Commit d37b88d1 parent 3f5b46618352 files · +2598093 −-8690Browse files

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	1	+/*
	2	+ * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
	3	+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	4	+ *
	5	+ * This code is free software; you can redistribute it and/or modify it
	6	+ * under the terms of the GNU General Public License version 2 only, as
	7	+ * published by the Free Software Foundation. Oracle designates this
	8	+ * particular file as subject to the "Classpath" exception as provided
	9	+ * by Oracle in the LICENSE file that accompanied this code.
	10	+ *
	11	+ * This code is distributed in the hope that it will be useful, but WITHOUT
	12	+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	14	+ * version 2 for more details (a copy is included in the LICENSE file that
	15	+ * accompanied this code).
	16	+ *
	17	+ * You should have received a copy of the GNU General Public License version
	18	+ * 2 along with this work; if not, write to the Free Software Foundation,
	19	+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	20	+ *
	21	+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	22	+ * or visit www.oracle.com if you need additional information or have any
	23	+ * questions.
	24	+ */
	25	+package javax.swing;
	26	+
	27	+import java.beans.PropertyChangeEvent;
	28	+import java.beans.PropertyChangeListener;
	29	+import java.beans.Transient;
	30	+import java.util.*;
	31	+
	32	+import java.awt.*;
	33	+import java.awt.event.*;
	34	+
	35	+import java.io.Serializable;
	36	+import java.io.ObjectOutputStream;
	37	+import java.io.IOException;
	38	+
	39	+import javax.swing.event.*;
	40	+import javax.swing.plaf.*;
	41	+
	42	+import javax.accessibility.*;
	43	+
	44	+/**
	45	+ * A component that combines a button or editable field and a drop-down list.
	46	+ * The user can select a value from the drop-down list, which appears at the
	47	+ * user's request. If you make the combo box editable, then the combo box
	48	+ * includes an editable field into which the user can type a value.
	49	+ * <p>
	50	+ * <strong>Warning:</strong> Swing is not thread safe. For more
	51	+ * information see <a
	52	+ * href="package-summary.html#threading">Swing's Threading
	53	+ * Policy</a>.
	54	+ * <p>
	55	+ * <strong>Warning:</strong>
	56	+ * Serialized objects of this class will not be compatible with
	57	+ * future Swing releases. The current serialization support is
	58	+ * appropriate for short term storage or RMI between applications running
	59	+ * the same version of Swing. As of 1.4, support for long term storage
	60	+ * of all JavaBeans<sup><font size="-2">TM</font></sup>
	61	+ * has been added to the <code>java.beans</code> package.
	62	+ * Please see {@link java.beans.XMLEncoder}.
	63	+ *
	64	+ * <p>
	65	+ * See <a href="http://java.sun.com/docs/books/tutorial/uiswing/components/combobox.html">How to Use Combo Boxes</a>
	66	+ * in <a href="http://java.sun.com/Series/Tutorial/index.html"><em>The Java Tutorial</em></a>
	67	+ * for further information.
	68	+ * <p>
	69	+ * @see ComboBoxModel
	70	+ * @see DefaultComboBoxModel
	71	+ *
	72	+ * @param <E> the type of the elements of this combo box
	73	+ *
	74	+ * @beaninfo
	75	+ * attribute: isContainer false
	76	+ * description: A combination of a text field and a drop-down list.
	77	+ *
	78	+ * @author Arnaud Weber
	79	+ * @author Mark Davidson
	80	+ */
	81	+public class JComboBox<E> extends JComponent
	82	+implements ItemSelectable,ListDataListener,ActionListener, Accessible {
	83	+ /**
	84	+ * @see #getUIClassID
	85	+ * @see #readObject
	86	+ */
	87	+ private static final String uiClassID = "ComboBoxUI";
	88	+
	89	+ /**
	90	+ * This protected field is implementation specific. Do not access directly
	91	+ * or override. Use the accessor methods instead.
	92	+ *
	93	+ * @see #getModel
	94	+ * @see #setModel
	95	+ */
	96	+ protected ComboBoxModel<E> dataModel;
	97	+ /**
	98	+ * This protected field is implementation specific. Do not access directly
	99	+ * or override. Use the accessor methods instead.
	100	+ *
	101	+ * @see #getRenderer
	102	+ * @see #setRenderer
	103	+ */
	104	+ protected ListCellRenderer<? super E> renderer;
	105	+ /**
	106	+ * This protected field is implementation specific. Do not access directly
	107	+ * or override. Use the accessor methods instead.
	108	+ *
	109	+ * @see #getEditor
	110	+ * @see #setEditor
	111	+ */
	112	+ protected ComboBoxEditor editor;
	113	+ /**
	114	+ * This protected field is implementation specific. Do not access directly
	115	+ * or override. Use the accessor methods instead.
	116	+ *
	117	+ * @see #getMaximumRowCount
	118	+ * @see #setMaximumRowCount
	119	+ */
	120	+ protected int maximumRowCount = 8;
	121	+
	122	+ /**
	123	+ * This protected field is implementation specific. Do not access directly
	124	+ * or override. Use the accessor methods instead.
	125	+ *
	126	+ * @see #isEditable
	127	+ * @see #setEditable
	128	+ */
	129	+ protected boolean isEditable = false;
	130	+ /**
	131	+ * This protected field is implementation specific. Do not access directly
	132	+ * or override. Use the accessor methods instead.
	133	+ *
	134	+ * @see #setKeySelectionManager
	135	+ * @see #getKeySelectionManager
	136	+ */
	137	+ protected KeySelectionManager keySelectionManager = null;
	138	+ /**
	139	+ * This protected field is implementation specific. Do not access directly
	140	+ * or override. Use the accessor methods instead.
	141	+ *
	142	+ * @see #setActionCommand
	143	+ * @see #getActionCommand
	144	+ */
	145	+ protected String actionCommand = "comboBoxChanged";
	146	+ /**
	147	+ * This protected field is implementation specific. Do not access directly
	148	+ * or override. Use the accessor methods instead.
	149	+ *
	150	+ * @see #setLightWeightPopupEnabled
	151	+ * @see #isLightWeightPopupEnabled
	152	+ */
	153	+ protected boolean lightWeightPopupEnabled = JPopupMenu.getDefaultLightWeightPopupEnabled();
	154	+
	155	+ /**
	156	+ * This protected field is implementation specific. Do not access directly
	157	+ * or override.
	158	+ */
	159	+ protected Object selectedItemReminder = null;
	160	+
	161	+ private E prototypeDisplayValue;
	162	+
	163	+ // Flag to ensure that infinite loops do not occur with ActionEvents.
	164	+ private boolean firingActionEvent = false;
	165	+
	166	+ // Flag to ensure the we don't get multiple ActionEvents on item selection.
	167	+ private boolean selectingItem = false;
	168	+
	169	+ /**
	170	+ * Creates a <code>JComboBox</code> that takes its items from an
	171	+ * existing <code>ComboBoxModel</code>. Since the
	172	+ * <code>ComboBoxModel</code> is provided, a combo box created using
	173	+ * this constructor does not create a default combo box model and
	174	+ * may impact how the insert, remove and add methods behave.
	175	+ *
	176	+ * @param aModel the <code>ComboBoxModel</code> that provides the
	177	+ * displayed list of items
	178	+ * @see DefaultComboBoxModel
	179	+ */
	180	+ public JComboBox(ComboBoxModel<E> aModel) {
	181	+ super();
	182	+ setModel(aModel);
	183	+ init();
	184	+ }
	185	+
	186	+ /**
	187	+ * Creates a <code>JComboBox</code> that contains the elements
	188	+ * in the specified array. By default the first item in the array
	189	+ * (and therefore the data model) becomes selected.
	190	+ *
	191	+ * @param items an array of objects to insert into the combo box
	192	+ * @see DefaultComboBoxModel
	193	+ */
	194	+ public JComboBox(E[] items) {
	195	+ super();
	196	+ setModel(new DefaultComboBoxModel<E>(items));
	197	+ init();
	198	+ }
	199	+
	200	+ /**
	201	+ * Creates a <code>JComboBox</code> that contains the elements
	202	+ * in the specified Vector. By default the first item in the vector
	203	+ * (and therefore the data model) becomes selected.
	204	+ *
	205	+ * @param items an array of vectors to insert into the combo box
	206	+ * @see DefaultComboBoxModel
	207	+ */
	208	+ public JComboBox(Vector<E> items) {
	209	+ super();
	210	+ setModel(new DefaultComboBoxModel<E>(items));
	211	+ init();
	212	+ }
	213	+
	214	+ /**
	215	+ * Creates a <code>JComboBox</code> with a default data model.
	216	+ * The default data model is an empty list of objects.
	217	+ * Use <code>addItem</code> to add items. By default the first item
	218	+ * in the data model becomes selected.
	219	+ *
	220	+ * @see DefaultComboBoxModel
	221	+ */
	222	+ public JComboBox() {
	223	+ super();
	224	+ setModel(new DefaultComboBoxModel<E>());
	225	+ init();
	226	+ }
	227	+
	228	+ private void init() {
	229	+ installAncestorListener();
	230	+ setUIProperty("opaque",true);
	231	+ updateUI();
	232	+ }
	233	+
	234	+ protected void installAncestorListener() {
	235	+ addAncestorListener(new AncestorListener(){
	236	+ public void ancestorAdded(AncestorEvent event){ hidePopup();}
	237	+ public void ancestorRemoved(AncestorEvent event){ hidePopup();}
	238	+ public void ancestorMoved(AncestorEvent event){
	239	+ if (event.getSource() != JComboBox.this)
	240	+ hidePopup();
	241	+ }});
	242	+ }
	243	+
	244	+ /**
	245	+ * Sets the L&F object that renders this component.
	246	+ *
	247	+ * @param ui the <code>ComboBoxUI</code> L&F object
	248	+ * @see UIDefaults#getUI
	249	+ *
	250	+ * @beaninfo
	251	+ * bound: true
	252	+ * hidden: true
	253	+ * attribute: visualUpdate true
	254	+ * description: The UI object that implements the Component's LookAndFeel.
	255	+ */
	256	+ public void setUI(ComboBoxUI ui) {
	257	+ super.setUI(ui);
	258	+ }
	259	+
	260	+ /**
	261	+ * Resets the UI property to a value from the current look and feel.
	262	+ *
	263	+ * @see JComponent#updateUI
	264	+ */
	265	+ public void updateUI() {
	266	+ setUI((ComboBoxUI)UIManager.getUI(this));
	267	+
	268	+ ListCellRenderer<? super E> renderer = getRenderer();
	269	+ if (renderer instanceof Component) {
	270	+ SwingUtilities.updateComponentTreeUI((Component)renderer);
	271	+ }
	272	+ }
	273	+
	274	+
	275	+ /**
	276	+ * Returns the name of the L&F class that renders this component.
	277	+ *
	278	+ * @return the string "ComboBoxUI"
	279	+ * @see JComponent#getUIClassID
	280	+ * @see UIDefaults#getUI
	281	+ */
	282	+ public String getUIClassID() {
	283	+ return uiClassID;
	284	+ }
	285	+
	286	+
	287	+ /**
	288	+ * Returns the L&F object that renders this component.
	289	+ *
	290	+ * @return the ComboBoxUI object that renders this component
	291	+ */
	292	+ public ComboBoxUI getUI() {
	293	+ return(ComboBoxUI)ui;
	294	+ }
	295	+
	296	+ /**
	297	+ * Sets the data model that the <code>JComboBox</code> uses to obtain
	298	+ * the list of items.
	299	+ *
	300	+ * @param aModel the <code>ComboBoxModel</code> that provides the
	301	+ * displayed list of items
	302	+ *
	303	+ * @beaninfo
	304	+ * bound: true
	305	+ * description: Model that the combo box uses to get data to display.
	306	+ */
	307	+ public void setModel(ComboBoxModel<E> aModel) {
	308	+ ComboBoxModel<E> oldModel = dataModel;
	309	+ if (oldModel != null) {
	310	+ oldModel.removeListDataListener(this);
	311	+ }
	312	+ dataModel = aModel;
	313	+ dataModel.addListDataListener(this);
	314	+
	315	+ // set the current selected item.
	316	+ selectedItemReminder = dataModel.getSelectedItem();
	317	+
	318	+ firePropertyChange( "model", oldModel, dataModel);
	319	+ }
	320	+
	321	+ /**
	322	+ * Returns the data model currently used by the <code>JComboBox</code>.
	323	+ *
	324	+ * @return the <code>ComboBoxModel</code> that provides the displayed
	325	+ * list of items
	326	+ */
	327	+ public ComboBoxModel<E> getModel() {
	328	+ return dataModel;
	329	+ }
	330	+
	331	+ /*
	332	+ * Properties
	333	+ */
	334	+
	335	+ /**
	336	+ * Sets the <code>lightWeightPopupEnabled</code> property, which
	337	+ * provides a hint as to whether or not a lightweight
	338	+ * <code>Component</code> should be used to contain the
	339	+ * <code>JComboBox</code>, versus a heavyweight
	340	+ * <code>Component</code> such as a <code>Panel</code>
	341	+ * or a <code>Window</code>. The decision of lightweight
	342	+ * versus heavyweight is ultimately up to the
	343	+ * <code>JComboBox</code>. Lightweight windows are more
	344	+ * efficient than heavyweight windows, but lightweight
	345	+ * and heavyweight components do not mix well in a GUI.
	346	+ * If your application mixes lightweight and heavyweight
	347	+ * components, you should disable lightweight popups.
	348	+ * The default value for the <code>lightWeightPopupEnabled</code>
	349	+ * property is <code>true</code>, unless otherwise specified
	350	+ * by the look and feel. Some look and feels always use
	351	+ * heavyweight popups, no matter what the value of this property.
	352	+ * <p>
	353	+ * See the article <a href="http://java.sun.com/products/jfc/tsc/articles/mixing/index.html">Mixing Heavy and Light Components</a>
	354	+ * on <a href="http://java.sun.com/products/jfc/tsc">
	355	+ * <em>The Swing Connection</em></a>
	356	+ * This method fires a property changed event.
	357	+ *
	358	+ * @param aFlag if <code>true</code>, lightweight popups are desired
	359	+ *
	360	+ * @beaninfo
	361	+ * bound: true
	362	+ * expert: true
	363	+ * description: Set to <code>false</code> to require heavyweight popups.
	364	+ */
	365	+ public void setLightWeightPopupEnabled(boolean aFlag) {
	366	+ boolean oldFlag = lightWeightPopupEnabled;
	367	+ lightWeightPopupEnabled = aFlag;
	368	+ firePropertyChange("lightWeightPopupEnabled", oldFlag, lightWeightPopupEnabled);
	369	+ }
	370	+
	371	+ /**
	372	+ * Gets the value of the <code>lightWeightPopupEnabled</code>
	373	+ * property.
	374	+ *
	375	+ * @return the value of the <code>lightWeightPopupEnabled</code>
	376	+ * property
	377	+ * @see #setLightWeightPopupEnabled
	378	+ */
	379	+ public boolean isLightWeightPopupEnabled() {
	380	+ return lightWeightPopupEnabled;
	381	+ }
	382	+
	383	+ /**
	384	+ * Determines whether the <code>JComboBox</code> field is editable.
	385	+ * An editable <code>JComboBox</code> allows the user to type into the
	386	+ * field or selected an item from the list to initialize the field,
	387	+ * after which it can be edited. (The editing affects only the field,
	388	+ * the list item remains intact.) A non editable <code>JComboBox</code>
	389	+ * displays the selected item in the field,
	390	+ * but the selection cannot be modified.
	391	+ *
	392	+ * @param aFlag a boolean value, where true indicates that the
	393	+ * field is editable
	394	+ *
	395	+ * @beaninfo
	396	+ * bound: true
	397	+ * preferred: true
	398	+ * description: If true, the user can type a new value in the combo box.
	399	+ */
	400	+ public void setEditable(boolean aFlag) {
	401	+ boolean oldFlag = isEditable;
	402	+ isEditable = aFlag;
	403	+ firePropertyChange( "editable", oldFlag, isEditable );
	404	+ }
	405	+
	406	+ /**
	407	+ * Returns true if the <code>JComboBox</code> is editable.
	408	+ * By default, a combo box is not editable.
	409	+ *
	410	+ * @return true if the <code>JComboBox</code> is editable, else false
	411	+ */
	412	+ public boolean isEditable() {
	413	+ return isEditable;
	414	+ }
	415	+
	416	+ /**
	417	+ * Sets the maximum number of rows the <code>JComboBox</code> displays.
	418	+ * If the number of objects in the model is greater than count,
	419	+ * the combo box uses a scrollbar.
	420	+ *
	421	+ * @param count an integer specifying the maximum number of items to
	422	+ * display in the list before using a scrollbar
	423	+ * @beaninfo
	424	+ * bound: true
	425	+ * preferred: true
	426	+ * description: The maximum number of rows the popup should have
	427	+ */
	428	+ public void setMaximumRowCount(int count) {
	429	+ int oldCount = maximumRowCount;
	430	+ maximumRowCount = count;
	431	+ firePropertyChange( "maximumRowCount", oldCount, maximumRowCount );
	432	+ }
	433	+
	434	+ /**
	435	+ * Returns the maximum number of items the combo box can display
	436	+ * without a scrollbar
	437	+ *
	438	+ * @return an integer specifying the maximum number of items that are
	439	+ * displayed in the list before using a scrollbar
	440	+ */
	441	+ public int getMaximumRowCount() {
	442	+ return maximumRowCount;
	443	+ }
	444	+
	445	+ /**
	446	+ * Sets the renderer that paints the list items and the item selected from the list in
	447	+ * the JComboBox field. The renderer is used if the JComboBox is not
	448	+ * editable. If it is editable, the editor is used to render and edit
	449	+ * the selected item.
	450	+ * <p>
	451	+ * The default renderer displays a string or an icon.
	452	+ * Other renderers can handle graphic images and composite items.
	453	+ * <p>
	454	+ * To display the selected item,
	455	+ * <code>aRenderer.getListCellRendererComponent</code>
	456	+ * is called, passing the list object and an index of -1.
	457	+ *
	458	+ * @param aRenderer the <code>ListCellRenderer</code> that
	459	+ * displays the selected item
	460	+ * @see #setEditor
	461	+ * @beaninfo
	462	+ * bound: true
	463	+ * expert: true
	464	+ * description: The renderer that paints the item selected in the list.
	465	+ */
	466	+ public void setRenderer(ListCellRenderer<? super E> aRenderer) {
	467	+ ListCellRenderer<? super E> oldRenderer = renderer;
	468	+ renderer = aRenderer;
	469	+ firePropertyChange( "renderer", oldRenderer, renderer );
	470	+ invalidate();
	471	+ }
	472	+
	473	+ /**
	474	+ * Returns the renderer used to display the selected item in the
	475	+ * <code>JComboBox</code> field.
	476	+ *
	477	+ * @return the <code>ListCellRenderer</code> that displays
	478	+ * the selected item.
	479	+ */
	480	+ public ListCellRenderer<? super E> getRenderer() {
	481	+ return renderer;
	482	+ }
	483	+
	484	+ /**
	485	+ * Sets the editor used to paint and edit the selected item in the
	486	+ * <code>JComboBox</code> field. The editor is used only if the
	487	+ * receiving <code>JComboBox</code> is editable. If not editable,
	488	+ * the combo box uses the renderer to paint the selected item.
	489	+ *
	490	+ * @param anEditor the <code>ComboBoxEditor</code> that
	491	+ * displays the selected item
	492	+ * @see #setRenderer
	493	+ * @beaninfo
	494	+ * bound: true
	495	+ * expert: true
	496	+ * description: The editor that combo box uses to edit the current value
	497	+ */
	498	+ public void setEditor(ComboBoxEditor anEditor) {
	499	+ ComboBoxEditor oldEditor = editor;
	500	+
	501	+ if ( editor != null ) {
	502	+ editor.removeActionListener(this);
	503	+ }
	504	+ editor = anEditor;
	505	+ if ( editor != null ) {
	506	+ editor.addActionListener(this);
	507	+ }
	508	+ firePropertyChange( "editor", oldEditor, editor );
	509	+ }
	510	+
	511	+ /**
	512	+ * Returns the editor used to paint and edit the selected item in the
	513	+ * <code>JComboBox</code> field.
	514	+ *
	515	+ * @return the <code>ComboBoxEditor</code> that displays the selected item
	516	+ */
	517	+ public ComboBoxEditor getEditor() {
	518	+ return editor;
	519	+ }
	520	+
	521	+ //
	522	+ // Selection
	523	+ //
	524	+
	525	+ /**
	526	+ * Sets the selected item in the combo box display area to the object in
	527	+ * the argument.
	528	+ * If <code>anObject</code> is in the list, the display area shows
	529	+ * <code>anObject</code> selected.
	530	+ * <p>
	531	+ * If <code>anObject</code> is <i>not</i> in the list and the combo box is
	532	+ * uneditable, it will not change the current selection. For editable
	533	+ * combo boxes, the selection will change to <code>anObject</code>.
	534	+ * <p>
	535	+ * If this constitutes a change in the selected item,
	536	+ * <code>ItemListener</code>s added to the combo box will be notified with
	537	+ * one or two <code>ItemEvent</code>s.
	538	+ * If there is a current selected item, an <code>ItemEvent</code> will be
	539	+ * fired and the state change will be <code>ItemEvent.DESELECTED</code>.
	540	+ * If <code>anObject</code> is in the list and is not currently selected
	541	+ * then an <code>ItemEvent</code> will be fired and the state change will
	542	+ * be <code>ItemEvent.SELECTED</code>.
	543	+ * <p>
	544	+ * <code>ActionListener</code>s added to the combo box will be notified
	545	+ * with an <code>ActionEvent</code> when this method is called.
	546	+ *
	547	+ * @param anObject the list object to select; use <code>null</code> to
	548	+ clear the selection
	549	+ * @beaninfo
	550	+ * preferred: true
	551	+ * description: Sets the selected item in the JComboBox.
	552	+ */
	553	+ public void setSelectedItem(Object anObject) {
	554	+ Object oldSelection = selectedItemReminder;
	555	+ Object objectToSelect = anObject;
	556	+ if (oldSelection == null \|\| !oldSelection.equals(anObject)) {
	557	+
	558	+ if (anObject != null && !isEditable()) {
	559	+ // For non editable combo boxes, an invalid selection
	560	+ // will be rejected.
	561	+ boolean found = false;
	562	+ for (int i = 0; i < dataModel.getSize(); i++) {
	563	+ E element = dataModel.getElementAt(i);
	564	+ if (anObject.equals(element)) {
	565	+ found = true;
	566	+ objectToSelect = element;
	567	+ break;
	568	+ }
	569	+ }
	570	+ if (!found) {
	571	+ return;
	572	+ }
	573	+ }
	574	+
	575	+ // Must toggle the state of this flag since this method
	576	+ // call may result in ListDataEvents being fired.
	577	+ selectingItem = true;
	578	+ dataModel.setSelectedItem(objectToSelect);
	579	+ selectingItem = false;
	580	+
	581	+ if (selectedItemReminder != dataModel.getSelectedItem()) {
	582	+ // in case a users implementation of ComboBoxModel
	583	+ // doesn't fire a ListDataEvent when the selection
	584	+ // changes.
	585	+ selectedItemChanged();
	586	+ }
	587	+ }
	588	+ fireActionEvent();
	589	+ }
	590	+
	591	+ /**
	592	+ * Returns the current selected item.
	593	+ * <p>
	594	+ * If the combo box is editable, then this value may not have been added
	595	+ * to the combo box with <code>addItem</code>, <code>insertItemAt</code>
	596	+ * or the data constructors.
	597	+ *
	598	+ * @return the current selected Object
	599	+ * @see #setSelectedItem
	600	+ */
	601	+ public Object getSelectedItem() {
	602	+ return dataModel.getSelectedItem();
	603	+ }
	604	+
	605	+ /**
	606	+ * Selects the item at index <code>anIndex</code>.
	607	+ *
	608	+ * @param anIndex an integer specifying the list item to select,
	609	+ * where 0 specifies the first item in the list and -1 indicates no selection
	610	+ * @exception IllegalArgumentException if <code>anIndex</code> < -1 or
	611	+ * <code>anIndex</code> is greater than or equal to size
	612	+ * @beaninfo
	613	+ * preferred: true
	614	+ * description: The item at index is selected.
	615	+ */
	616	+ public void setSelectedIndex(int anIndex) {
	617	+ int size = dataModel.getSize();
	618	+
	619	+ if ( anIndex == -1 ) {
	620	+ setSelectedItem( null );
	621	+ } else if ( anIndex < -1 \|\| anIndex >= size ) {
	622	+ throw new IllegalArgumentException("setSelectedIndex: " + anIndex + " out of bounds");
	623	+ } else {
	624	+ setSelectedItem(dataModel.getElementAt(anIndex));
	625	+ }
	626	+ }
	627	+
	628	+ /**
	629	+ * Returns the first item in the list that matches the given item.
	630	+ * The result is not always defined if the <code>JComboBox</code>
	631	+ * allows selected items that are not in the list.
	632	+ * Returns -1 if there is no selected item or if the user specified
	633	+ * an item which is not in the list.
	634	+
	635	+ * @return an integer specifying the currently selected list item,
	636	+ * where 0 specifies
	637	+ * the first item in the list;
	638	+ * or -1 if no item is selected or if
	639	+ * the currently selected item is not in the list
	640	+ */
	641	+ @Transient
	642	+ public int getSelectedIndex() {
	643	+ Object sObject = dataModel.getSelectedItem();
	644	+ int i,c;
	645	+ E obj;
	646	+
	647	+ for ( i=0,c=dataModel.getSize();i<c;i++ ) {
	648	+ obj = dataModel.getElementAt(i);
	649	+ if ( obj != null && obj.equals(sObject) )
	650	+ return i;
	651	+ }
	652	+ return -1;
	653	+ }
	654	+
	655	+ /**
	656	+ * Returns the "prototypical display" value - an Object used
	657	+ * for the calculation of the display height and width.
	658	+ *
	659	+ * @return the value of the <code>prototypeDisplayValue</code> property
	660	+ * @see #setPrototypeDisplayValue
	661	+ * @since 1.4
	662	+ */
	663	+ public E getPrototypeDisplayValue() {
	664	+ return prototypeDisplayValue;
	665	+ }
	666	+
	667	+ /**
	668	+ * Sets the prototype display value used to calculate the size of the display
	669	+ * for the UI portion.
	670	+ * <p>
	671	+ * If a prototype display value is specified, the preferred size of
	672	+ * the combo box is calculated by configuring the renderer with the
	673	+ * prototype display value and obtaining its preferred size. Specifying
	674	+ * the preferred display value is often useful when the combo box will be
	675	+ * displaying large amounts of data. If no prototype display value has
	676	+ * been specified, the renderer must be configured for each value from
	677	+ * the model and its preferred size obtained, which can be
	678	+ * relatively expensive.
	679	+ *
	680	+ * @param prototypeDisplayValue
	681	+ * @see #getPrototypeDisplayValue
	682	+ * @since 1.4
	683	+ * @beaninfo
	684	+ * bound: true
	685	+ * attribute: visualUpdate true
	686	+ * description: The display prototype value, used to compute display width and height.
	687	+ */
	688	+ public void setPrototypeDisplayValue(E prototypeDisplayValue) {
	689	+ Object oldValue = this.prototypeDisplayValue;
	690	+ this.prototypeDisplayValue = prototypeDisplayValue;
	691	+ firePropertyChange("prototypeDisplayValue", oldValue, prototypeDisplayValue);
	692	+ }
	693	+
	694	+ /**
	695	+ * Adds an item to the item list.
	696	+ * This method works only if the <code>JComboBox</code> uses a
	697	+ * mutable data model.
	698	+ * <p>
	699	+ * <strong>Warning:</strong>
	700	+ * Focus and keyboard navigation problems may arise if you add duplicate
	701	+ * String objects. A workaround is to add new objects instead of String
	702	+ * objects and make sure that the toString() method is defined.
	703	+ * For example:
	704	+ * <pre>
	705	+ * comboBox.addItem(makeObj("Item 1"));
	706	+ * comboBox.addItem(makeObj("Item 1"));
	707	+ * ...
	708	+ * private Object makeObj(final String item) {
	709	+ * return new Object() { public String toString() { return item; } };
	710	+ * }
	711	+ * </pre>
	712	+ *
	713	+ * @param item the item to add to the list
	714	+ * @see MutableComboBoxModel
	715	+ */
	716	+ public void addItem(E item) {
	717	+ checkMutableComboBoxModel();
	718	+ ((MutableComboBoxModel<E>)dataModel).addElement(item);
	719	+ }
	720	+
	721	+ /**
	722	+ * Inserts an item into the item list at a given index.
	723	+ * This method works only if the <code>JComboBox</code> uses a
	724	+ * mutable data model.
	725	+ *
	726	+ * @param item the item to add to the list
	727	+ * @param index an integer specifying the position at which
	728	+ * to add the item
	729	+ * @see MutableComboBoxModel
	730	+ */
	731	+ public void insertItemAt(E item, int index) {
	732	+ checkMutableComboBoxModel();
	733	+ ((MutableComboBoxModel<E>)dataModel).insertElementAt(item,index);
	734	+ }
	735	+
	736	+ /**
	737	+ * Removes an item from the item list.
	738	+ * This method works only if the <code>JComboBox</code> uses a
	739	+ * mutable data model.
	740	+ *
	741	+ * @param anObject the object to remove from the item list
	742	+ * @see MutableComboBoxModel
	743	+ */
	744	+ public void removeItem(Object anObject) {
	745	+ checkMutableComboBoxModel();
	746	+ ((MutableComboBoxModel)dataModel).removeElement(anObject);
	747	+ }
	748	+
	749	+ /**
	750	+ * Removes the item at <code>anIndex</code>
	751	+ * This method works only if the <code>JComboBox</code> uses a
	752	+ * mutable data model.
	753	+ *
	754	+ * @param anIndex an int specifying the index of the item to remove,
	755	+ * where 0
	756	+ * indicates the first item in the list
	757	+ * @see MutableComboBoxModel
	758	+ */
	759	+ public void removeItemAt(int anIndex) {
	760	+ checkMutableComboBoxModel();
	761	+ ((MutableComboBoxModel<E>)dataModel).removeElementAt( anIndex );
	762	+ }
	763	+
	764	+ /**
	765	+ * Removes all items from the item list.
	766	+ */
	767	+ public void removeAllItems() {
	768	+ checkMutableComboBoxModel();
	769	+ MutableComboBoxModel<E> model = (MutableComboBoxModel<E>)dataModel;
	770	+ int size = model.getSize();
	771	+
	772	+ if ( model instanceof DefaultComboBoxModel ) {
	773	+ ((DefaultComboBoxModel)model).removeAllElements();
	774	+ }
	775	+ else {
	776	+ for ( int i = 0; i < size; ++i ) {
	777	+ E element = model.getElementAt( 0 );
	778	+ model.removeElement( element );
	779	+ }
	780	+ }
	781	+ selectedItemReminder = null;
	782	+ if (isEditable()) {
	783	+ editor.setItem(null);
	784	+ }
	785	+ }
	786	+
	787	+ /**
	788	+ * Checks that the <code>dataModel</code> is an instance of
	789	+ * <code>MutableComboBoxModel</code>. If not, it throws an exception.
	790	+ * @exception RuntimeException if <code>dataModel</code> is not an
	791	+ * instance of <code>MutableComboBoxModel</code>.
	792	+ */
	793	+ void checkMutableComboBoxModel() {
	794	+ if ( !(dataModel instanceof MutableComboBoxModel) )
	795	+ throw new RuntimeException("Cannot use this method with a non-Mutable data model.");
	796	+ }
	797	+
	798	+ /**
	799	+ * Causes the combo box to display its popup window.
	800	+ * @see #setPopupVisible
	801	+ */
	802	+ public void showPopup() {
	803	+ setPopupVisible(true);
	804	+ }
	805	+
	806	+ /**
	807	+ * Causes the combo box to close its popup window.
	808	+ * @see #setPopupVisible
	809	+ */
	810	+ public void hidePopup() {
	811	+ setPopupVisible(false);
	812	+ }
	813	+
	814	+ /**
	815	+ * Sets the visibility of the popup.
	816	+ */
	817	+ public void setPopupVisible(boolean v) {
	818	+ getUI().setPopupVisible(this, v);
	819	+ }
	820	+
	821	+ /**
	822	+ * Determines the visibility of the popup.
	823	+ *
	824	+ * @return true if the popup is visible, otherwise returns false
	825	+ */
	826	+ public boolean isPopupVisible() {
	827	+ return getUI().isPopupVisible(this);
	828	+ }
	829	+
	830	+ / Selection /
	831	+
	832	+ /**
	833	+ * Adds an <code>ItemListener</code>.
	834	+ * <p>
	835	+ * <code>aListener</code> will receive one or two <code>ItemEvent</code>s when
	836	+ * the selected item changes.
	837	+ *
	838	+ * @param aListener the <code>ItemListener</code> that is to be notified
	839	+ * @see #setSelectedItem
	840	+ */
	841	+ public void addItemListener(ItemListener aListener) {
	842	+ listenerList.add(ItemListener.class,aListener);
	843	+ }
	844	+
	845	+ /** Removes an <code>ItemListener</code>.
	846	+ *
	847	+ * @param aListener the <code>ItemListener</code> to remove
	848	+ */
	849	+ public void removeItemListener(ItemListener aListener) {
	850	+ listenerList.remove(ItemListener.class,aListener);
	851	+ }
	852	+
	853	+ /**
	854	+ * Returns an array of all the <code>ItemListener</code>s added
	855	+ * to this JComboBox with addItemListener().
	856	+ *
	857	+ * @return all of the <code>ItemListener</code>s added or an empty
	858	+ * array if no listeners have been added
	859	+ * @since 1.4
	860	+ */
	861	+ public ItemListener[] getItemListeners() {
	862	+ return listenerList.getListeners(ItemListener.class);
	863	+ }
	864	+
	865	+ /**
	866	+ * Adds an <code>ActionListener</code>.
	867	+ * <p>
	868	+ * The <code>ActionListener</code> will receive an <code>ActionEvent</code>
	869	+ * when a selection has been made. If the combo box is editable, then
	870	+ * an <code>ActionEvent</code> will be fired when editing has stopped.
	871	+ *
	872	+ * @param l the <code>ActionListener</code> that is to be notified
	873	+ * @see #setSelectedItem
	874	+ */
	875	+ public void addActionListener(ActionListener l) {
	876	+ listenerList.add(ActionListener.class,l);
	877	+ }
	878	+
	879	+ /** Removes an <code>ActionListener</code>.
	880	+ *
	881	+ * @param l the <code>ActionListener</code> to remove
	882	+ */
	883	+ public void removeActionListener(ActionListener l) {
	884	+ if ((l != null) && (getAction() == l)) {
	885	+ setAction(null);
	886	+ } else {
	887	+ listenerList.remove(ActionListener.class, l);
	888	+ }
	889	+ }
	890	+
	891	+ /**
	892	+ * Returns an array of all the <code>ActionListener</code>s added
	893	+ * to this JComboBox with addActionListener().
	894	+ *
	895	+ * @return all of the <code>ActionListener</code>s added or an empty
	896	+ * array if no listeners have been added
	897	+ * @since 1.4
	898	+ */
	899	+ public ActionListener[] getActionListeners() {
	900	+ return listenerList.getListeners(ActionListener.class);
	901	+ }
	902	+
	903	+ /**
	904	+ * Adds a <code>PopupMenu</code> listener which will listen to notification
	905	+ * messages from the popup portion of the combo box.
	906	+ * <p>
	907	+ * For all standard look and feels shipped with Java, the popup list
	908	+ * portion of combo box is implemented as a <code>JPopupMenu</code>.
	909	+ * A custom look and feel may not implement it this way and will
	910	+ * therefore not receive the notification.
	911	+ *
	912	+ * @param l the <code>PopupMenuListener</code> to add
	913	+ * @since 1.4
	914	+ */
	915	+ public void addPopupMenuListener(PopupMenuListener l) {
	916	+ listenerList.add(PopupMenuListener.class,l);
	917	+ }
	918	+
	919	+ /**
	920	+ * Removes a <code>PopupMenuListener</code>.
	921	+ *
	922	+ * @param l the <code>PopupMenuListener</code> to remove
	923	+ * @see #addPopupMenuListener
	924	+ * @since 1.4
	925	+ */
	926	+ public void removePopupMenuListener(PopupMenuListener l) {
	927	+ listenerList.remove(PopupMenuListener.class,l);
	928	+ }
	929	+
	930	+ /**
	931	+ * Returns an array of all the <code>PopupMenuListener</code>s added
	932	+ * to this JComboBox with addPopupMenuListener().
	933	+ *
	934	+ * @return all of the <code>PopupMenuListener</code>s added or an empty
	935	+ * array if no listeners have been added
	936	+ * @since 1.4
	937	+ */
	938	+ public PopupMenuListener[] getPopupMenuListeners() {
	939	+ return listenerList.getListeners(PopupMenuListener.class);
	940	+ }
	941	+
	942	+ /**
	943	+ * Notifies <code>PopupMenuListener</code>s that the popup portion of the
	944	+ * combo box will become visible.
	945	+ * <p>
	946	+ * This method is public but should not be called by anything other than
	947	+ * the UI delegate.
	948	+ * @see #addPopupMenuListener
	949	+ * @since 1.4
	950	+ */
	951	+ public void firePopupMenuWillBecomeVisible() {
	952	+ Object[] listeners = listenerList.getListenerList();
	953	+ PopupMenuEvent e=null;
	954	+ for (int i = listeners.length-2; i>=0; i-=2) {
	955	+ if (listeners[i]==PopupMenuListener.class) {
	956	+ if (e == null)
	957	+ e = new PopupMenuEvent(this);
	958	+ ((PopupMenuListener)listeners[i+1]).popupMenuWillBecomeVisible(e);
	959	+ }
	960	+ }
	961	+ }
	962	+
	963	+ /**
	964	+ * Notifies <code>PopupMenuListener</code>s that the popup portion of the
	965	+ * combo box has become invisible.
	966	+ * <p>
	967	+ * This method is public but should not be called by anything other than
	968	+ * the UI delegate.
	969	+ * @see #addPopupMenuListener
	970	+ * @since 1.4
	971	+ */
	972	+ public void firePopupMenuWillBecomeInvisible() {
	973	+ Object[] listeners = listenerList.getListenerList();
	974	+ PopupMenuEvent e=null;
	975	+ for (int i = listeners.length-2; i>=0; i-=2) {
	976	+ if (listeners[i]==PopupMenuListener.class) {
	977	+ if (e == null)
	978	+ e = new PopupMenuEvent(this);
	979	+ ((PopupMenuListener)listeners[i+1]).popupMenuWillBecomeInvisible(e);
	980	+ }
	981	+ }
	982	+ }
	983	+
	984	+ /**
	985	+ * Notifies <code>PopupMenuListener</code>s that the popup portion of the
	986	+ * combo box has been canceled.
	987	+ * <p>
	988	+ * This method is public but should not be called by anything other than
	989	+ * the UI delegate.
	990	+ * @see #addPopupMenuListener
	991	+ * @since 1.4
	992	+ */
	993	+ public void firePopupMenuCanceled() {
	994	+ Object[] listeners = listenerList.getListenerList();
	995	+ PopupMenuEvent e=null;
	996	+ for (int i = listeners.length-2; i>=0; i-=2) {
	997	+ if (listeners[i]==PopupMenuListener.class) {
	998	+ if (e == null)
	999	+ e = new PopupMenuEvent(this);
	1000	+ ((PopupMenuListener)listeners[i+1]).popupMenuCanceled(e);
	1001	+ }
	1002	+ }
	1003	+ }
	1004	+
	1005	+ /**
	1006	+ * Sets the action command that should be included in the event
	1007	+ * sent to action listeners.
	1008	+ *
	1009	+ * @param aCommand a string containing the "command" that is sent
	1010	+ * to action listeners; the same listener can then
	1011	+ * do different things depending on the command it
	1012	+ * receives
	1013	+ */
	1014	+ public void setActionCommand(String aCommand) {
	1015	+ actionCommand = aCommand;
	1016	+ }
	1017	+
	1018	+ /**
	1019	+ * Returns the action command that is included in the event sent to
	1020	+ * action listeners.
	1021	+ *
	1022	+ * @return the string containing the "command" that is sent
	1023	+ * to action listeners.
	1024	+ */
	1025	+ public String getActionCommand() {
	1026	+ return actionCommand;
	1027	+ }
	1028	+
	1029	+ private Action action;
	1030	+ private PropertyChangeListener actionPropertyChangeListener;
	1031	+
	1032	+ /**
	1033	+ * Sets the <code>Action</code> for the <code>ActionEvent</code> source.
	1034	+ * The new <code>Action</code> replaces any previously set
	1035	+ * <code>Action</code> but does not affect <code>ActionListeners</code>
	1036	+ * independently added with <code>addActionListener</code>.
	1037	+ * If the <code>Action</code> is already a registered
	1038	+ * <code>ActionListener</code> for the <code>ActionEvent</code> source,
	1039	+ * it is not re-registered.
	1040	+ * <p>
	1041	+ * Setting the <code>Action</code> results in immediately changing
	1042	+ * all the properties described in <a href="Action.html#buttonActions">
	1043	+ * Swing Components Supporting <code>Action</code></a>.
	1044	+ * Subsequently, the combobox's properties are automatically updated
	1045	+ * as the <code>Action</code>'s properties change.
	1046	+ * <p>
	1047	+ * This method uses three other methods to set
	1048	+ * and help track the <code>Action</code>'s property values.
	1049	+ * It uses the <code>configurePropertiesFromAction</code> method
	1050	+ * to immediately change the combobox's properties.
	1051	+ * To track changes in the <code>Action</code>'s property values,
	1052	+ * this method registers the <code>PropertyChangeListener</code>
	1053	+ * returned by <code>createActionPropertyChangeListener</code>. The
	1054	+ * default {@code PropertyChangeListener} invokes the
	1055	+ * {@code actionPropertyChanged} method when a property in the
	1056	+ * {@code Action} changes.
	1057	+ *
	1058	+ * @param a the <code>Action</code> for the <code>JComboBox</code>,
	1059	+ * or <code>null</code>.
	1060	+ * @since 1.3
	1061	+ * @see Action
	1062	+ * @see #getAction
	1063	+ * @see #configurePropertiesFromAction
	1064	+ * @see #createActionPropertyChangeListener
	1065	+ * @see #actionPropertyChanged
	1066	+ * @beaninfo
	1067	+ * bound: true
	1068	+ * attribute: visualUpdate true
	1069	+ * description: the Action instance connected with this ActionEvent source
	1070	+ */
	1071	+ public void setAction(Action a) {
	1072	+ Action oldValue = getAction();
	1073	+ if (action==null \|\| !action.equals(a)) {
	1074	+ action = a;
	1075	+ if (oldValue!=null) {
	1076	+ removeActionListener(oldValue);
	1077	+ oldValue.removePropertyChangeListener(actionPropertyChangeListener);
	1078	+ actionPropertyChangeListener = null;
	1079	+ }
	1080	+ configurePropertiesFromAction(action);
	1081	+ if (action!=null) {
	1082	+ // Don't add if it is already a listener
	1083	+ if (!isListener(ActionListener.class, action)) {
	1084	+ addActionListener(action);
	1085	+ }
	1086	+ // Reverse linkage:
	1087	+ actionPropertyChangeListener = createActionPropertyChangeListener(action);
	1088	+ action.addPropertyChangeListener(actionPropertyChangeListener);
	1089	+ }
	1090	+ firePropertyChange("action", oldValue, action);
	1091	+ }
	1092	+ }
	1093	+
	1094	+ private boolean isListener(Class c, ActionListener a) {
	1095	+ boolean isListener = false;
	1096	+ Object[] listeners = listenerList.getListenerList();
	1097	+ for (int i = listeners.length-2; i>=0; i-=2) {
	1098	+ if (listeners[i]==c && listeners[i+1]==a) {
	1099	+ isListener=true;
	1100	+ }
	1101	+ }
	1102	+ return isListener;
	1103	+ }
	1104	+
	1105	+ /**
	1106	+ * Returns the currently set <code>Action</code> for this
	1107	+ * <code>ActionEvent</code> source, or <code>null</code> if no
	1108	+ * <code>Action</code> is set.
	1109	+ *
	1110	+ * @return the <code>Action</code> for this <code>ActionEvent</code>
	1111	+ * source; or <code>null</code>
	1112	+ * @since 1.3
	1113	+ * @see Action
	1114	+ * @see #setAction
	1115	+ */
	1116	+ public Action getAction() {
	1117	+ return action;
	1118	+ }
	1119	+
	1120	+ /**
	1121	+ * Sets the properties on this combobox to match those in the specified
	1122	+ * <code>Action</code>. Refer to <a href="Action.html#buttonActions">
	1123	+ * Swing Components Supporting <code>Action</code></a> for more
	1124	+ * details as to which properties this sets.
	1125	+ *
	1126	+ * @param a the <code>Action</code> from which to get the properties,
	1127	+ * or <code>null</code>
	1128	+ * @since 1.3
	1129	+ * @see Action
	1130	+ * @see #setAction
	1131	+ */
	1132	+ protected void configurePropertiesFromAction(Action a) {
	1133	+ AbstractAction.setEnabledFromAction(this, a);
	1134	+ AbstractAction.setToolTipTextFromAction(this, a);
	1135	+ setActionCommandFromAction(a);
	1136	+ }
	1137	+
	1138	+ /**
	1139	+ * Creates and returns a <code>PropertyChangeListener</code> that is
	1140	+ * responsible for listening for changes from the specified
	1141	+ * <code>Action</code> and updating the appropriate properties.
	1142	+ * <p>
	1143	+ * <b>Warning:</b> If you subclass this do not create an anonymous
	1144	+ * inner class. If you do the lifetime of the combobox will be tied to
	1145	+ * that of the <code>Action</code>.
	1146	+ *
	1147	+ * @param a the combobox's action
	1148	+ * @since 1.3
	1149	+ * @see Action
	1150	+ * @see #setAction
	1151	+ */
	1152	+ protected PropertyChangeListener createActionPropertyChangeListener(Action a) {
	1153	+ return new ComboBoxActionPropertyChangeListener(this, a);
	1154	+ }
	1155	+
	1156	+ /**
	1157	+ * Updates the combobox's state in response to property changes in
	1158	+ * associated action. This method is invoked from the
	1159	+ * {@code PropertyChangeListener} returned from
	1160	+ * {@code createActionPropertyChangeListener}. Subclasses do not normally
	1161	+ * need to invoke this. Subclasses that support additional {@code Action}
	1162	+ * properties should override this and
	1163	+ * {@code configurePropertiesFromAction}.
	1164	+ * <p>
	1165	+ * Refer to the table at <a href="Action.html#buttonActions">
	1166	+ * Swing Components Supporting <code>Action</code></a> for a list of
	1167	+ * the properties this method sets.
	1168	+ *
	1169	+ * @param action the <code>Action</code> associated with this combobox
	1170	+ * @param propertyName the name of the property that changed
	1171	+ * @since 1.6
	1172	+ * @see Action
	1173	+ * @see #configurePropertiesFromAction
	1174	+ */
	1175	+ protected void actionPropertyChanged(Action action, String propertyName) {
	1176	+ if (propertyName == Action.ACTION_COMMAND_KEY) {
	1177	+ setActionCommandFromAction(action);
	1178	+ } else if (propertyName == "enabled") {
	1179	+ AbstractAction.setEnabledFromAction(this, action);
	1180	+ } else if (Action.SHORT_DESCRIPTION == propertyName) {
	1181	+ AbstractAction.setToolTipTextFromAction(this, action);
	1182	+ }
	1183	+ }
	1184	+
	1185	+ private void setActionCommandFromAction(Action a) {
	1186	+ setActionCommand((a != null) ?
	1187	+ (String)a.getValue(Action.ACTION_COMMAND_KEY) :
	1188	+ null);
	1189	+ }
	1190	+
	1191	+
	1192	+ private static class ComboBoxActionPropertyChangeListener
	1193	+ extends ActionPropertyChangeListener<JComboBox<?>> {
	1194	+ ComboBoxActionPropertyChangeListener(JComboBox<?> b, Action a) {
	1195	+ super(b, a);
	1196	+ }
	1197	+ protected void actionPropertyChanged(JComboBox<?> cb,
	1198	+ Action action,
	1199	+ PropertyChangeEvent e) {
	1200	+ if (AbstractAction.shouldReconfigure(e)) {
	1201	+ cb.configurePropertiesFromAction(action);
	1202	+ } else {
	1203	+ cb.actionPropertyChanged(action, e.getPropertyName());
	1204	+ }
	1205	+ }
	1206	+ }
	1207	+
	1208	+ /**
	1209	+ * Notifies all listeners that have registered interest for
	1210	+ * notification on this event type.
	1211	+ * @param e the event of interest
	1212	+ *
	1213	+ * @see EventListenerList
	1214	+ */
	1215	+ protected void fireItemStateChanged(ItemEvent e) {
	1216	+ // Guaranteed to return a non-null array
	1217	+ Object[] listeners = listenerList.getListenerList();
	1218	+ // Process the listeners last to first, notifying
	1219	+ // those that are interested in this event
	1220	+ for ( int i = listeners.length-2; i>=0; i-=2 ) {
	1221	+ if ( listeners[i]==ItemListener.class ) {
	1222	+ // Lazily create the event:
	1223	+ // if (changeEvent == null)
	1224	+ // changeEvent = new ChangeEvent(this);
	1225	+ ((ItemListener)listeners[i+1]).itemStateChanged(e);
	1226	+ }
	1227	+ }
	1228	+ }
	1229	+
	1230	+ /**
	1231	+ * Notifies all listeners that have registered interest for
	1232	+ * notification on this event type.
	1233	+ *
	1234	+ * @see EventListenerList
	1235	+ */
	1236	+ protected void fireActionEvent() {
	1237	+ if (!firingActionEvent) {
	1238	+ // Set flag to ensure that an infinite loop is not created
	1239	+ firingActionEvent = true;
	1240	+ ActionEvent e = null;
	1241	+ // Guaranteed to return a non-null array
	1242	+ Object[] listeners = listenerList.getListenerList();
	1243	+ long mostRecentEventTime = EventQueue.getMostRecentEventTime();
	1244	+ int modifiers = 0;
	1245	+ AWTEvent currentEvent = EventQueue.getCurrentEvent();
	1246	+ if (currentEvent instanceof InputEvent) {
	1247	+ modifiers = ((InputEvent)currentEvent).getModifiers();
	1248	+ } else if (currentEvent instanceof ActionEvent) {
	1249	+ modifiers = ((ActionEvent)currentEvent).getModifiers();
	1250	+ }
	1251	+ // Process the listeners last to first, notifying
	1252	+ // those that are interested in this event
	1253	+ for ( int i = listeners.length-2; i>=0; i-=2 ) {
	1254	+ if ( listeners[i]==ActionListener.class ) {
	1255	+ // Lazily create the event:
	1256	+ if ( e == null )
	1257	+ e = new ActionEvent(this,ActionEvent.ACTION_PERFORMED,
	1258	+ getActionCommand(),
	1259	+ mostRecentEventTime, modifiers);
	1260	+ ((ActionListener)listeners[i+1]).actionPerformed(e);
	1261	+ }
	1262	+ }
	1263	+ firingActionEvent = false;
	1264	+ }
	1265	+ }
	1266	+
	1267	+ /**
	1268	+ * This protected method is implementation specific. Do not access directly
	1269	+ * or override.
	1270	+ */
	1271	+ protected void selectedItemChanged() {
	1272	+ if (selectedItemReminder != null ) {
	1273	+ fireItemStateChanged(new ItemEvent(this,ItemEvent.ITEM_STATE_CHANGED,
	1274	+ selectedItemReminder,
	1275	+ ItemEvent.DESELECTED));
	1276	+ }
	1277	+
	1278	+ // set the new selected item.
	1279	+ selectedItemReminder = dataModel.getSelectedItem();
	1280	+
	1281	+ if (selectedItemReminder != null ) {
	1282	+ fireItemStateChanged(new ItemEvent(this,ItemEvent.ITEM_STATE_CHANGED,
	1283	+ selectedItemReminder,
	1284	+ ItemEvent.SELECTED));
	1285	+ }
	1286	+ }
	1287	+
	1288	+ /**
	1289	+ * Returns an array containing the selected item.
	1290	+ * This method is implemented for compatibility with
	1291	+ * <code>ItemSelectable</code>.
	1292	+ *
	1293	+ * @return an array of <code>Objects</code> containing one
	1294	+ * element -- the selected item
	1295	+ */
	1296	+ public Object[] getSelectedObjects() {
	1297	+ Object selectedObject = getSelectedItem();
	1298	+ if ( selectedObject == null )
	1299	+ return new Object[0];
	1300	+ else {
	1301	+ Object result[] = new Object[1];
	1302	+ result[0] = selectedObject;
	1303	+ return result;
	1304	+ }
	1305	+ }
	1306	+
	1307	+ /**
	1308	+ * This method is public as an implementation side effect.
	1309	+ * do not call or override.
	1310	+ */
	1311	+ public void actionPerformed(ActionEvent e) {
	1312	+ Object newItem = getEditor().getItem();
	1313	+ setPopupVisible(false);
	1314	+ getModel().setSelectedItem(newItem);
	1315	+ String oldCommand = getActionCommand();
	1316	+ setActionCommand("comboBoxEdited");
	1317	+ fireActionEvent();
	1318	+ setActionCommand(oldCommand);
	1319	+ }
	1320	+
	1321	+ /**
	1322	+ * This method is public as an implementation side effect.
	1323	+ * do not call or override.
	1324	+ */
	1325	+ public void contentsChanged(ListDataEvent e) {
	1326	+ Object oldSelection = selectedItemReminder;
	1327	+ Object newSelection = dataModel.getSelectedItem();
	1328	+ if (oldSelection == null \|\| !oldSelection.equals(newSelection)) {
	1329	+ selectedItemChanged();
	1330	+ if (!selectingItem) {
	1331	+ fireActionEvent();
	1332	+ }
	1333	+ }
	1334	+ }
	1335	+
	1336	+ /**
	1337	+ * This method is public as an implementation side effect.
	1338	+ * do not call or override.
	1339	+ */
	1340	+ public void intervalAdded(ListDataEvent e) {
	1341	+ if (selectedItemReminder != dataModel.getSelectedItem()) {
	1342	+ selectedItemChanged();
	1343	+ }
	1344	+ }
	1345	+
	1346	+ /**
	1347	+ * This method is public as an implementation side effect.
	1348	+ * do not call or override.
	1349	+ */
	1350	+ public void intervalRemoved(ListDataEvent e) {
	1351	+ contentsChanged(e);
	1352	+ }
	1353	+
	1354	+ /**
	1355	+ * Selects the list item that corresponds to the specified keyboard
	1356	+ * character and returns true, if there is an item corresponding
	1357	+ * to that character. Otherwise, returns false.
	1358	+ *
	1359	+ * @param keyChar a char, typically this is a keyboard key
	1360	+ * typed by the user
	1361	+ */
	1362	+ public boolean selectWithKeyChar(char keyChar) {
	1363	+ int index;
	1364	+
	1365	+ if ( keySelectionManager == null )
	1366	+ keySelectionManager = createDefaultKeySelectionManager();
	1367	+
	1368	+ index = keySelectionManager.selectionForKey(keyChar,getModel());
	1369	+ if ( index != -1 ) {
	1370	+ setSelectedIndex(index);
	1371	+ return true;
	1372	+ }
	1373	+ else
	1374	+ return false;
	1375	+ }
	1376	+
	1377	+ /**
	1378	+ * Enables the combo box so that items can be selected. When the
	1379	+ * combo box is disabled, items cannot be selected and values
	1380	+ * cannot be typed into its field (if it is editable).
	1381	+ *
	1382	+ * @param b a boolean value, where true enables the component and
	1383	+ * false disables it
	1384	+ * @beaninfo
	1385	+ * bound: true
	1386	+ * preferred: true
	1387	+ * description: Whether the combo box is enabled.
	1388	+ */
	1389	+ public void setEnabled(boolean b) {
	1390	+ super.setEnabled(b);
	1391	+ firePropertyChange( "enabled", !isEnabled(), isEnabled() );
	1392	+ }
	1393	+
	1394	+ /**
	1395	+ * Initializes the editor with the specified item.
	1396	+ *
	1397	+ * @param anEditor the <code>ComboBoxEditor</code> that displays
	1398	+ * the list item in the
	1399	+ * combo box field and allows it to be edited
	1400	+ * @param anItem the object to display and edit in the field
	1401	+ */
	1402	+ public void configureEditor(ComboBoxEditor anEditor, Object anItem) {
	1403	+ anEditor.setItem(anItem);
	1404	+ }
	1405	+
	1406	+ /**
	1407	+ * Handles <code>KeyEvent</code>s, looking for the Tab key.
	1408	+ * If the Tab key is found, the popup window is closed.
	1409	+ *
	1410	+ * @param e the <code>KeyEvent</code> containing the keyboard
	1411	+ * key that was pressed
	1412	+ */
	1413	+ public void processKeyEvent(KeyEvent e) {
	1414	+ if ( e.getKeyCode() == KeyEvent.VK_TAB ) {
	1415	+ hidePopup();
	1416	+ }
	1417	+ super.processKeyEvent(e);
	1418	+ }
	1419	+
	1420	+ /**
	1421	+ * Sets the object that translates a keyboard character into a list
	1422	+ * selection. Typically, the first selection with a matching first
	1423	+ * character becomes the selected item.
	1424	+ *
	1425	+ * @beaninfo
	1426	+ * expert: true
	1427	+ * description: The objects that changes the selection when a key is pressed.
	1428	+ */
	1429	+ public void setKeySelectionManager(KeySelectionManager aManager) {
	1430	+ keySelectionManager = aManager;
	1431	+ }
	1432	+
	1433	+ /**
	1434	+ * Returns the list's key-selection manager.
	1435	+ *
	1436	+ * @return the <code>KeySelectionManager</code> currently in use
	1437	+ */
	1438	+ public KeySelectionManager getKeySelectionManager() {
	1439	+ return keySelectionManager;
	1440	+ }
	1441	+
	1442	+ /* Accessing the model */
	1443	+ /**
	1444	+ * Returns the number of items in the list.
	1445	+ *
	1446	+ * @return an integer equal to the number of items in the list
	1447	+ */
	1448	+ public int getItemCount() {
	1449	+ return dataModel.getSize();
	1450	+ }
	1451	+
	1452	+ /**
	1453	+ * Returns the list item at the specified index. If <code>index</code>
	1454	+ * is out of range (less than zero or greater than or equal to size)
	1455	+ * it will return <code>null</code>.
	1456	+ *
	1457	+ * @param index an integer indicating the list position, where the first
	1458	+ * item starts at zero
	1459	+ * @return the item at that list position; or
	1460	+ * <code>null</code> if out of range
	1461	+ */
	1462	+ public E getItemAt(int index) {
	1463	+ return dataModel.getElementAt(index);
	1464	+ }
	1465	+
	1466	+ /**
	1467	+ * Returns an instance of the default key-selection manager.
	1468	+ *
	1469	+ * @return the <code>KeySelectionManager</code> currently used by the list
	1470	+ * @see #setKeySelectionManager
	1471	+ */
	1472	+ protected KeySelectionManager createDefaultKeySelectionManager() {
	1473	+ return new DefaultKeySelectionManager();
	1474	+ }
	1475	+
	1476	+
	1477	+ /**
	1478	+ * The interface that defines a <code>KeySelectionManager</code>.
	1479	+ * To qualify as a <code>KeySelectionManager</code>,
	1480	+ * the class needs to implement the method
	1481	+ * that identifies the list index given a character and the
	1482	+ * combo box data model.
	1483	+ */
	1484	+ public interface KeySelectionManager {
	1485	+ /** Given <code>aKey</code> and the model, returns the row
	1486	+ * that should become selected. Return -1 if no match was
	1487	+ * found.
	1488	+ *
	1489	+ * @param aKey a char value, usually indicating a keyboard key that
	1490	+ * was pressed
	1491	+ * @param aModel a ComboBoxModel -- the component's data model, containing
	1492	+ * the list of selectable items
	1493	+ * @return an int equal to the selected row, where 0 is the
	1494	+ * first item and -1 is none.
	1495	+ */
	1496	+ int selectionForKey(char aKey,ComboBoxModel aModel);
	1497	+ }
	1498	+
	1499	+ class DefaultKeySelectionManager implements KeySelectionManager, Serializable {
	1500	+ public int selectionForKey(char aKey,ComboBoxModel aModel) {
	1501	+ int i,c;
	1502	+ int currentSelection = -1;
	1503	+ Object selectedItem = aModel.getSelectedItem();
	1504	+ String v;
	1505	+ String pattern;
	1506	+
	1507	+ if ( selectedItem != null ) {
	1508	+ for ( i=0,c=aModel.getSize();i<c;i++ ) {
	1509	+ if ( selectedItem == aModel.getElementAt(i) ) {
	1510	+ currentSelection = i;
	1511	+ break;
	1512	+ }
	1513	+ }
	1514	+ }
	1515	+
	1516	+ pattern = ("" + aKey).toLowerCase();
	1517	+ aKey = pattern.charAt(0);
	1518	+
	1519	+ for ( i = ++currentSelection, c = aModel.getSize() ; i < c ; i++ ) {
	1520	+ Object elem = aModel.getElementAt(i);
	1521	+ if (elem != null && elem.toString() != null) {
	1522	+ v = elem.toString().toLowerCase();
	1523	+ if ( v.length() > 0 && v.charAt(0) == aKey )
	1524	+ return i;
	1525	+ }
	1526	+ }
	1527	+
	1528	+ for ( i = 0 ; i < currentSelection ; i ++ ) {
	1529	+ Object elem = aModel.getElementAt(i);
	1530	+ if (elem != null && elem.toString() != null) {
	1531	+ v = elem.toString().toLowerCase();
	1532	+ if ( v.length() > 0 && v.charAt(0) == aKey )
	1533	+ return i;
	1534	+ }
	1535	+ }
	1536	+ return -1;
	1537	+ }
	1538	+ }
	1539	+
	1540	+
	1541	+ /**
	1542	+ * See <code>readObject</code> and <code>writeObject</code> in
	1543	+ * <code>JComponent</code> for more
	1544	+ * information about serialization in Swing.
	1545	+ */
	1546	+ private void writeObject(ObjectOutputStream s) throws IOException {
	1547	+ s.defaultWriteObject();
	1548	+ if (getUIClassID().equals(uiClassID)) {
	1549	+ byte count = JComponent.getWriteObjCounter(this);
	1550	+ JComponent.setWriteObjCounter(this, --count);
	1551	+ if (count == 0 && ui != null) {
	1552	+ ui.installUI(this);
	1553	+ }
	1554	+ }
	1555	+ }
	1556	+
	1557	+
	1558	+ /**
	1559	+ * Returns a string representation of this <code>JComboBox</code>.
	1560	+ * This method is intended to be used only for debugging purposes,
	1561	+ * and the content and format of the returned string may vary between
	1562	+ * implementations. The returned string may be empty but may not
	1563	+ * be <code>null</code>.
	1564	+ *
	1565	+ * @return a string representation of this <code>JComboBox</code>
	1566	+ */
	1567	+ protected String paramString() {
	1568	+ String selectedItemReminderString = (selectedItemReminder != null ?
	1569	+ selectedItemReminder.toString() :
	1570	+ "");
	1571	+ String isEditableString = (isEditable ? "true" : "false");
	1572	+ String lightWeightPopupEnabledString = (lightWeightPopupEnabled ?
	1573	+ "true" : "false");
	1574	+
	1575	+ return super.paramString() +
	1576	+ ",isEditable=" + isEditableString +
	1577	+ ",lightWeightPopupEnabled=" + lightWeightPopupEnabledString +
	1578	+ ",maximumRowCount=" + maximumRowCount +
	1579	+ ",selectedItemReminder=" + selectedItemReminderString;
	1580	+ }
	1581	+
	1582	+
	1583	+///////////////////
	1584	+// Accessibility support
	1585	+///////////////////
	1586	+
	1587	+ /**
	1588	+ * Gets the AccessibleContext associated with this JComboBox.
	1589	+ * For combo boxes, the AccessibleContext takes the form of an
	1590	+ * AccessibleJComboBox.
	1591	+ * A new AccessibleJComboBox instance is created if necessary.
	1592	+ *
	1593	+ * @return an AccessibleJComboBox that serves as the
	1594	+ * AccessibleContext of this JComboBox
	1595	+ */
	1596	+ public AccessibleContext getAccessibleContext() {
	1597	+ if ( accessibleContext == null ) {
	1598	+ accessibleContext = new AccessibleJComboBox();
	1599	+ }
	1600	+ return accessibleContext;
	1601	+ }
	1602	+
	1603	+ /**
	1604	+ * This class implements accessibility support for the
	1605	+ * <code>JComboBox</code> class. It provides an implementation of the
	1606	+ * Java Accessibility API appropriate to Combo Box user-interface elements.
	1607	+ * <p>
	1608	+ * <strong>Warning:</strong>
	1609	+ * Serialized objects of this class will not be compatible with
	1610	+ * future Swing releases. The current serialization support is
	1611	+ * appropriate for short term storage or RMI between applications running
	1612	+ * the same version of Swing. As of 1.4, support for long term storage
	1613	+ * of all JavaBeans<sup><font size="-2">TM</font></sup>
	1614	+ * has been added to the <code>java.beans</code> package.
	1615	+ * Please see {@link java.beans.XMLEncoder}.
	1616	+ */
	1617	+ protected class AccessibleJComboBox extends AccessibleJComponent
	1618	+ implements AccessibleAction, AccessibleSelection {
	1619	+
	1620	+
	1621	+ private JList popupList; // combo box popup list
	1622	+ private Accessible previousSelectedAccessible = null;
	1623	+
	1624	+ /**
	1625	+ * Returns an AccessibleJComboBox instance
	1626	+ * @since 1.4
	1627	+ */
	1628	+ public AccessibleJComboBox() {
	1629	+ // set the combo box editor's accessible name and description
	1630	+ JComboBox.this.addPropertyChangeListener(new AccessibleJComboBoxPropertyChangeListener());
	1631	+ setEditorNameAndDescription();
	1632	+
	1633	+ // Get the popup list
	1634	+ Accessible a = getUI().getAccessibleChild(JComboBox.this, 0);
	1635	+ if (a instanceof javax.swing.plaf.basic.ComboPopup) {
	1636	+ // Listen for changes to the popup menu selection.
	1637	+ popupList = ((javax.swing.plaf.basic.ComboPopup)a).getList();
	1638	+ popupList.addListSelectionListener(
	1639	+ new AccessibleJComboBoxListSelectionListener());
	1640	+ }
	1641	+ // Listen for popup menu show/hide events
	1642	+ JComboBox.this.addPopupMenuListener(
	1643	+ new AccessibleJComboBoxPopupMenuListener());
	1644	+ }
	1645	+
	1646	+ /*
	1647	+ * JComboBox PropertyChangeListener
	1648	+ */
	1649	+ private class AccessibleJComboBoxPropertyChangeListener
	1650	+ implements PropertyChangeListener {
	1651	+
	1652	+ public void propertyChange(PropertyChangeEvent e) {
	1653	+ if (e.getPropertyName() == "editor") {
	1654	+ // set the combo box editor's accessible name
	1655	+ // and description
	1656	+ setEditorNameAndDescription();
	1657	+ }
	1658	+ }
	1659	+ }
	1660	+
	1661	+ /*
	1662	+ * Sets the combo box editor's accessible name and descripton
	1663	+ */
	1664	+ private void setEditorNameAndDescription() {
	1665	+ ComboBoxEditor editor = JComboBox.this.getEditor();
	1666	+ if (editor != null) {
	1667	+ Component comp = editor.getEditorComponent();
	1668	+ if (comp instanceof Accessible) {
	1669	+ AccessibleContext ac = comp.getAccessibleContext();
	1670	+ if (ac != null) { // may be null
	1671	+ ac.setAccessibleName(getAccessibleName());
	1672	+ ac.setAccessibleDescription(getAccessibleDescription());
	1673	+ }
	1674	+ }
	1675	+ }
	1676	+ }
	1677	+
	1678	+ /*
	1679	+ * Listener for combo box popup menu
	1680	+ * TIGER - 4669379 4894434
	1681	+ */
	1682	+ private class AccessibleJComboBoxPopupMenuListener
	1683	+ implements PopupMenuListener {
	1684	+
	1685	+ /**
	1686	+ * This method is called before the popup menu becomes visible
	1687	+ */
	1688	+ public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
	1689	+ // save the initial selection
	1690	+ if (popupList == null) {
	1691	+ return;
	1692	+ }
	1693	+ int selectedIndex = popupList.getSelectedIndex();
	1694	+ if (selectedIndex < 0) {
	1695	+ return;
	1696	+ }
	1697	+ previousSelectedAccessible =
	1698	+ popupList.getAccessibleContext().getAccessibleChild(selectedIndex);
	1699	+ }
	1700	+
	1701	+ /**
	1702	+ * This method is called before the popup menu becomes invisible
	1703	+ * Note that a JPopupMenu can become invisible any time
	1704	+ */
	1705	+ public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
	1706	+ // ignore
	1707	+ }
	1708	+
	1709	+ /**
	1710	+ * This method is called when the popup menu is canceled
	1711	+ */
	1712	+ public void popupMenuCanceled(PopupMenuEvent e) {
	1713	+ // ignore
	1714	+ }
	1715	+ }
	1716	+
	1717	+ /*
	1718	+ * Handles changes to the popup list selection.
	1719	+ * TIGER - 4669379 4894434 4933143
	1720	+ */
	1721	+ private class AccessibleJComboBoxListSelectionListener
	1722	+ implements ListSelectionListener {
	1723	+
	1724	+ public void valueChanged(ListSelectionEvent e) {
	1725	+ if (popupList == null) {
	1726	+ return;
	1727	+ }
	1728	+
	1729	+ // Get the selected popup list item.
	1730	+ int selectedIndex = popupList.getSelectedIndex();
	1731	+ if (selectedIndex < 0) {
	1732	+ return;
	1733	+ }
	1734	+ Accessible selectedAccessible =
	1735	+ popupList.getAccessibleContext().getAccessibleChild(selectedIndex);
	1736	+ if (selectedAccessible == null) {
	1737	+ return;
	1738	+ }
	1739	+
	1740	+ // Fire a FOCUSED lost PropertyChangeEvent for the
	1741	+ // previously selected list item.
	1742	+ PropertyChangeEvent pce;
	1743	+
	1744	+ if (previousSelectedAccessible != null) {
	1745	+ pce = new PropertyChangeEvent(previousSelectedAccessible,
	1746	+ AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
	1747	+ AccessibleState.FOCUSED, null);
	1748	+ firePropertyChange(AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
	1749	+ null, pce);
	1750	+ }
	1751	+ // Fire a FOCUSED gained PropertyChangeEvent for the
	1752	+ // currently selected list item.
	1753	+ pce = new PropertyChangeEvent(selectedAccessible,
	1754	+ AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
	1755	+ null, AccessibleState.FOCUSED);
	1756	+ firePropertyChange(AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
	1757	+ null, pce);
	1758	+
	1759	+ // Fire the ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY event
	1760	+ // for the combo box.
	1761	+ firePropertyChange(AccessibleContext.ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY,
	1762	+ previousSelectedAccessible, selectedAccessible);
	1763	+
	1764	+ // Save the previous selection.
	1765	+ previousSelectedAccessible = selectedAccessible;
	1766	+ }
	1767	+ }
	1768	+
	1769	+
	1770	+ /**
	1771	+ * Returns the number of accessible children in the object. If all
	1772	+ * of the children of this object implement Accessible, than this
	1773	+ * method should return the number of children of this object.
	1774	+ *
	1775	+ * @return the number of accessible children in the object.
	1776	+ */
	1777	+ public int getAccessibleChildrenCount() {
	1778	+ // Always delegate to the UI if it exists
	1779	+ if (ui != null) {
	1780	+ return ui.getAccessibleChildrenCount(JComboBox.this);
	1781	+ } else {
	1782	+ return super.getAccessibleChildrenCount();
	1783	+ }
	1784	+ }
	1785	+
	1786	+ /**
	1787	+ * Returns the nth Accessible child of the object.
	1788	+ * The child at index zero represents the popup.
	1789	+ * If the combo box is editable, the child at index one
	1790	+ * represents the editor.
	1791	+ *
	1792	+ * @param i zero-based index of child
	1793	+ * @return the nth Accessible child of the object
	1794	+ */
	1795	+ public Accessible getAccessibleChild(int i) {
	1796	+ // Always delegate to the UI if it exists
	1797	+ if (ui != null) {
	1798	+ return ui.getAccessibleChild(JComboBox.this, i);
	1799	+ } else {
	1800	+ return super.getAccessibleChild(i);
	1801	+ }
	1802	+ }
	1803	+
	1804	+ /**
	1805	+ * Get the role of this object.
	1806	+ *
	1807	+ * @return an instance of AccessibleRole describing the role of the
	1808	+ * object
	1809	+ * @see AccessibleRole
	1810	+ */
	1811	+ public AccessibleRole getAccessibleRole() {
	1812	+ return AccessibleRole.COMBO_BOX;
	1813	+ }
	1814	+
	1815	+ /**
	1816	+ * Gets the state set of this object. The AccessibleStateSet of
	1817	+ * an object is composed of a set of unique AccessibleStates.
	1818	+ * A change in the AccessibleStateSet of an object will cause a
	1819	+ * PropertyChangeEvent to be fired for the ACCESSIBLE_STATE_PROPERTY
	1820	+ * property.
	1821	+ *
	1822	+ * @return an instance of AccessibleStateSet containing the
	1823	+ * current state set of the object
	1824	+ * @see AccessibleStateSet
	1825	+ * @see AccessibleState
	1826	+ * @see #addPropertyChangeListener
	1827	+ *
	1828	+ */
	1829	+ public AccessibleStateSet getAccessibleStateSet() {
	1830	+ // TIGER - 4489748
	1831	+ AccessibleStateSet ass = super.getAccessibleStateSet();
	1832	+ if (ass == null) {
	1833	+ ass = new AccessibleStateSet();
	1834	+ }
	1835	+ if (JComboBox.this.isPopupVisible()) {
	1836	+ ass.add(AccessibleState.EXPANDED);
	1837	+ } else {
	1838	+ ass.add(AccessibleState.COLLAPSED);
	1839	+ }
	1840	+ return ass;
	1841	+ }
	1842	+
	1843	+ /**
	1844	+ * Get the AccessibleAction associated with this object. In the
	1845	+ * implementation of the Java Accessibility API for this class,
	1846	+ * return this object, which is responsible for implementing the
	1847	+ * AccessibleAction interface on behalf of itself.
	1848	+ *
	1849	+ * @return this object
	1850	+ */
	1851	+ public AccessibleAction getAccessibleAction() {
	1852	+ return this;
	1853	+ }
	1854	+
	1855	+ /**
	1856	+ * Return a description of the specified action of the object.
	1857	+ *
	1858	+ * @param i zero-based index of the actions
	1859	+ */
	1860	+ public String getAccessibleActionDescription(int i) {
	1861	+ if (i == 0) {
	1862	+ return UIManager.getString("ComboBox.togglePopupText");
	1863	+ }
	1864	+ else {
	1865	+ return null;
	1866	+ }
	1867	+ }
	1868	+
	1869	+ /**
	1870	+ * Returns the number of Actions available in this object. The
	1871	+ * default behavior of a combo box is to have one action.
	1872	+ *
	1873	+ * @return 1, the number of Actions in this object
	1874	+ */
	1875	+ public int getAccessibleActionCount() {
	1876	+ return 1;
	1877	+ }
	1878	+
	1879	+ /**
	1880	+ * Perform the specified Action on the object
	1881	+ *
	1882	+ * @param i zero-based index of actions
	1883	+ * @return true if the the action was performed; else false.
	1884	+ */
	1885	+ public boolean doAccessibleAction(int i) {
	1886	+ if (i == 0) {
	1887	+ setPopupVisible(!isPopupVisible());
	1888	+ return true;
	1889	+ }
	1890	+ else {
	1891	+ return false;
	1892	+ }
	1893	+ }
	1894	+
	1895	+
	1896	+ /**
	1897	+ * Get the AccessibleSelection associated with this object. In the
	1898	+ * implementation of the Java Accessibility API for this class,
	1899	+ * return this object, which is responsible for implementing the
	1900	+ * AccessibleSelection interface on behalf of itself.
	1901	+ *
	1902	+ * @return this object
	1903	+ */
	1904	+ public AccessibleSelection getAccessibleSelection() {
	1905	+ return this;
	1906	+ }
	1907	+
	1908	+ /**
	1909	+ * Returns the number of Accessible children currently selected.
	1910	+ * If no children are selected, the return value will be 0.
	1911	+ *
	1912	+ * @return the number of items currently selected.
	1913	+ * @since 1.3
	1914	+ */
	1915	+ public int getAccessibleSelectionCount() {
	1916	+ Object o = JComboBox.this.getSelectedItem();
	1917	+ if (o != null) {
	1918	+ return 1;
	1919	+ } else {
	1920	+ return 0;
	1921	+ }
	1922	+ }
	1923	+
	1924	+ /**
	1925	+ * Returns an Accessible representing the specified selected child
	1926	+ * in the popup. If there isn't a selection, or there are
	1927	+ * fewer children selected than the integer passed in, the return
	1928	+ * value will be null.
	1929	+ * <p>Note that the index represents the i-th selected child, which
	1930	+ * is different from the i-th child.
	1931	+ *
	1932	+ * @param i the zero-based index of selected children
	1933	+ * @return the i-th selected child
	1934	+ * @see #getAccessibleSelectionCount
	1935	+ * @since 1.3
	1936	+ */
	1937	+ public Accessible getAccessibleSelection(int i) {
	1938	+ // Get the popup
	1939	+ Accessible a =
	1940	+ JComboBox.this.getUI().getAccessibleChild(JComboBox.this, 0);
	1941	+ if (a != null &&
	1942	+ a instanceof javax.swing.plaf.basic.ComboPopup) {
	1943	+
	1944	+ // get the popup list
	1945	+ JList list = ((javax.swing.plaf.basic.ComboPopup)a).getList();
	1946	+
	1947	+ // return the i-th selection in the popup list
	1948	+ AccessibleContext ac = list.getAccessibleContext();
	1949	+ if (ac != null) {
	1950	+ AccessibleSelection as = ac.getAccessibleSelection();
	1951	+ if (as != null) {
	1952	+ return as.getAccessibleSelection(i);
	1953	+ }
	1954	+ }
	1955	+ }
	1956	+ return null;
	1957	+ }
	1958	+
	1959	+ /**
	1960	+ * Determines if the current child of this object is selected.
	1961	+ *
	1962	+ * @return true if the current child of this object is selected;
	1963	+ * else false
	1964	+ * @param i the zero-based index of the child in this Accessible
	1965	+ * object.
	1966	+ * @see AccessibleContext#getAccessibleChild
	1967	+ * @since 1.3
	1968	+ */
	1969	+ public boolean isAccessibleChildSelected(int i) {
	1970	+ return JComboBox.this.getSelectedIndex() == i;
	1971	+ }
	1972	+
	1973	+ /**
	1974	+ * Adds the specified Accessible child of the object to the object's
	1975	+ * selection. If the object supports multiple selections,
	1976	+ * the specified child is added to any existing selection, otherwise
	1977	+ * it replaces any existing selection in the object. If the
	1978	+ * specified child is already selected, this method has no effect.
	1979	+ *
	1980	+ * @param i the zero-based index of the child
	1981	+ * @see AccessibleContext#getAccessibleChild
	1982	+ * @since 1.3
	1983	+ */
	1984	+ public void addAccessibleSelection(int i) {
	1985	+ // TIGER - 4856195
	1986	+ clearAccessibleSelection();
	1987	+ JComboBox.this.setSelectedIndex(i);
	1988	+ }
	1989	+
	1990	+ /**
	1991	+ * Removes the specified child of the object from the object's
	1992	+ * selection. If the specified item isn't currently selected, this
	1993	+ * method has no effect.
	1994	+ *
	1995	+ * @param i the zero-based index of the child
	1996	+ * @see AccessibleContext#getAccessibleChild
	1997	+ * @since 1.3
	1998	+ */
	1999	+ public void removeAccessibleSelection(int i) {
	2000	+ if (JComboBox.this.getSelectedIndex() == i) {
	2001	+ clearAccessibleSelection();
	2002	+ }
	2003	+ }
	2004	+
	2005	+ /**
	2006	+ * Clears the selection in the object, so that no children in the
	2007	+ * object are selected.
	2008	+ * @since 1.3
	2009	+ */
	2010	+ public void clearAccessibleSelection() {
	2011	+ JComboBox.this.setSelectedIndex(-1);
	2012	+ }
	2013	+
	2014	+ /**
	2015	+ * Causes every child of the object to be selected
	2016	+ * if the object supports multiple selections.
	2017	+ * @since 1.3
	2018	+ */
	2019	+ public void selectAllAccessibleSelection() {
	2020	+ // do nothing since multiple selection is not supported
	2021	+ }
	2022	+
	2023	+// public Accessible getAccessibleAt(Point p) {
	2024	+// Accessible a = getAccessibleChild(1);
	2025	+// if ( a != null ) {
	2026	+// return a; // the editor
	2027	+// }
	2028	+// else {
	2029	+// return getAccessibleChild(0); // the list
	2030	+// }
	2031	+// }
	2032	+ private EditorAccessibleContext editorAccessibleContext = null;
	2033	+
	2034	+ private class AccessibleEditor implements Accessible {
	2035	+ public AccessibleContext getAccessibleContext() {
	2036	+ if (editorAccessibleContext == null) {
	2037	+ Component c = JComboBox.this.getEditor().getEditorComponent();
	2038	+ if (c instanceof Accessible) {
	2039	+ editorAccessibleContext =
	2040	+ new EditorAccessibleContext((Accessible)c);
	2041	+ }
	2042	+ }
	2043	+ return editorAccessibleContext;
	2044	+ }
	2045	+ }
	2046	+
	2047	+ /*
	2048	+ * Wrapper class for the AccessibleContext implemented by the
	2049	+ * combo box editor. Delegates all method calls except
	2050	+ * getAccessibleIndexInParent to the editor. The
	2051	+ * getAccessibleIndexInParent method returns the selected
	2052	+ * index in the combo box.
	2053	+ */
	2054	+ private class EditorAccessibleContext extends AccessibleContext {
	2055	+
	2056	+ private AccessibleContext ac;
	2057	+
	2058	+ private EditorAccessibleContext() {
	2059	+ }
	2060	+
	2061	+ /*
	2062	+ * @param a the AccessibleContext implemented by the
	2063	+ * combo box editor
	2064	+ */
	2065	+ EditorAccessibleContext(Accessible a) {
	2066	+ this.ac = a.getAccessibleContext();
	2067	+ }
	2068	+
	2069	+ /**
	2070	+ * Gets the accessibleName property of this object. The accessibleName
	2071	+ * property of an object is a localized String that designates the purpose
	2072	+ * of the object. For example, the accessibleName property of a label
	2073	+ * or button might be the text of the label or button itself. In the
	2074	+ * case of an object that doesn't display its name, the accessibleName
	2075	+ * should still be set. For example, in the case of a text field used
	2076	+ * to enter the name of a city, the accessibleName for the en_US locale
	2077	+ * could be 'city.'
	2078	+ *
	2079	+ * @return the localized name of the object; null if this
	2080	+ * object does not have a name
	2081	+ *
	2082	+ * @see #setAccessibleName
	2083	+ */
	2084	+ public String getAccessibleName() {
	2085	+ return ac.getAccessibleName();
	2086	+ }
	2087	+
	2088	+ /**
	2089	+ * Sets the localized accessible name of this object. Changing the
	2090	+ * name will cause a PropertyChangeEvent to be fired for the
	2091	+ * ACCESSIBLE_NAME_PROPERTY property.
	2092	+ *
	2093	+ * @param s the new localized name of the object.
	2094	+ *
	2095	+ * @see #getAccessibleName
	2096	+ * @see #addPropertyChangeListener
	2097	+ *
	2098	+ * @beaninfo
	2099	+ * preferred: true
	2100	+ * description: Sets the accessible name for the component.
	2101	+ */
	2102	+ public void setAccessibleName(String s) {
	2103	+ ac.setAccessibleName(s);
	2104	+ }
	2105	+
	2106	+ /**
	2107	+ * Gets the accessibleDescription property of this object. The
	2108	+ * accessibleDescription property of this object is a short localized
	2109	+ * phrase describing the purpose of the object. For example, in the
	2110	+ * case of a 'Cancel' button, the accessibleDescription could be
	2111	+ * 'Ignore changes and close dialog box.'
	2112	+ *
	2113	+ * @return the localized description of the object; null if
	2114	+ * this object does not have a description
	2115	+ *
	2116	+ * @see #setAccessibleDescription
	2117	+ */
	2118	+ public String getAccessibleDescription() {
	2119	+ return ac.getAccessibleDescription();
	2120	+ }
	2121	+
	2122	+ /**
	2123	+ * Sets the accessible description of this object. Changing the
	2124	+ * name will cause a PropertyChangeEvent to be fired for the
	2125	+ * ACCESSIBLE_DESCRIPTION_PROPERTY property.
	2126	+ *
	2127	+ * @param s the new localized description of the object
	2128	+ *
	2129	+ * @see #setAccessibleName
	2130	+ * @see #addPropertyChangeListener
	2131	+ *
	2132	+ * @beaninfo
	2133	+ * preferred: true
	2134	+ * description: Sets the accessible description for the component.
	2135	+ */
	2136	+ public void setAccessibleDescription(String s) {
	2137	+ ac.setAccessibleDescription(s);
	2138	+ }
	2139	+
	2140	+ /**
	2141	+ * Gets the role of this object. The role of the object is the generic
	2142	+ * purpose or use of the class of this object. For example, the role
	2143	+ * of a push button is AccessibleRole.PUSH_BUTTON. The roles in
	2144	+ * AccessibleRole are provided so component developers can pick from
	2145	+ * a set of predefined roles. This enables assistive technologies to
	2146	+ * provide a consistent interface to various tweaked subclasses of
	2147	+ * components (e.g., use AccessibleRole.PUSH_BUTTON for all components
	2148	+ * that act like a push button) as well as distinguish between sublasses
	2149	+ * that behave differently (e.g., AccessibleRole.CHECK_BOX for check boxes
	2150	+ * and AccessibleRole.RADIO_BUTTON for radio buttons).
	2151	+ * <p>Note that the AccessibleRole class is also extensible, so
	2152	+ * custom component developers can define their own AccessibleRole's
	2153	+ * if the set of predefined roles is inadequate.
	2154	+ *
	2155	+ * @return an instance of AccessibleRole describing the role of the object
	2156	+ * @see AccessibleRole
	2157	+ */
	2158	+ public AccessibleRole getAccessibleRole() {
	2159	+ return ac.getAccessibleRole();
	2160	+ }
	2161	+
	2162	+ /**
	2163	+ * Gets the state set of this object. The AccessibleStateSet of an object
	2164	+ * is composed of a set of unique AccessibleStates. A change in the
	2165	+ * AccessibleStateSet of an object will cause a PropertyChangeEvent to
	2166	+ * be fired for the ACCESSIBLE_STATE_PROPERTY property.
	2167	+ *
	2168	+ * @return an instance of AccessibleStateSet containing the
	2169	+ * current state set of the object
	2170	+ * @see AccessibleStateSet
	2171	+ * @see AccessibleState
	2172	+ * @see #addPropertyChangeListener
	2173	+ */
	2174	+ public AccessibleStateSet getAccessibleStateSet() {
	2175	+ return ac.getAccessibleStateSet();
	2176	+ }
	2177	+
	2178	+ /**
	2179	+ * Gets the Accessible parent of this object.
	2180	+ *
	2181	+ * @return the Accessible parent of this object; null if this
	2182	+ * object does not have an Accessible parent
	2183	+ */
	2184	+ public Accessible getAccessibleParent() {
	2185	+ return ac.getAccessibleParent();
	2186	+ }
	2187	+
	2188	+ /**
	2189	+ * Sets the Accessible parent of this object. This is meant to be used
	2190	+ * only in the situations where the actual component's parent should
	2191	+ * not be treated as the component's accessible parent and is a method
	2192	+ * that should only be called by the parent of the accessible child.
	2193	+ *
	2194	+ * @param a - Accessible to be set as the parent
	2195	+ */
	2196	+ public void setAccessibleParent(Accessible a) {
	2197	+ ac.setAccessibleParent(a);
	2198	+ }
	2199	+
	2200	+ /**
	2201	+ * Gets the 0-based index of this object in its accessible parent.
	2202	+ *
	2203	+ * @return the 0-based index of this object in its parent; -1 if this
	2204	+ * object does not have an accessible parent.
	2205	+ *
	2206	+ * @see #getAccessibleParent
	2207	+ * @see #getAccessibleChildrenCount
	2208	+ * @see #getAccessibleChild
	2209	+ */
	2210	+ public int getAccessibleIndexInParent() {
	2211	+ return JComboBox.this.getSelectedIndex();
	2212	+ }
	2213	+
	2214	+ /**
	2215	+ * Returns the number of accessible children of the object.
	2216	+ *
	2217	+ * @return the number of accessible children of the object.
	2218	+ */
	2219	+ public int getAccessibleChildrenCount() {
	2220	+ return ac.getAccessibleChildrenCount();
	2221	+ }
	2222	+
	2223	+ /**
	2224	+ * Returns the specified Accessible child of the object. The Accessible
	2225	+ * children of an Accessible object are zero-based, so the first child
	2226	+ * of an Accessible child is at index 0, the second child is at index 1,
	2227	+ * and so on.
	2228	+ *
	2229	+ * @param i zero-based index of child
	2230	+ * @return the Accessible child of the object
	2231	+ * @see #getAccessibleChildrenCount
	2232	+ */
	2233	+ public Accessible getAccessibleChild(int i) {
	2234	+ return ac.getAccessibleChild(i);
	2235	+ }
	2236	+
	2237	+ /**
	2238	+ * Gets the locale of the component. If the component does not have a
	2239	+ * locale, then the locale of its parent is returned.
	2240	+ *
	2241	+ * @return this component's locale. If this component does not have
	2242	+ * a locale, the locale of its parent is returned.
	2243	+ *
	2244	+ * @exception IllegalComponentStateException
	2245	+ * If the Component does not have its own locale and has not yet been
	2246	+ * added to a containment hierarchy such that the locale can be
	2247	+ * determined from the containing parent.
	2248	+ */
	2249	+ public Locale getLocale() throws IllegalComponentStateException {
	2250	+ return ac.getLocale();
	2251	+ }
	2252	+
	2253	+ /**
	2254	+ * Adds a PropertyChangeListener to the listener list.
	2255	+ * The listener is registered for all Accessible properties and will
	2256	+ * be called when those properties change.
	2257	+ *
	2258	+ * @see #ACCESSIBLE_NAME_PROPERTY
	2259	+ * @see #ACCESSIBLE_DESCRIPTION_PROPERTY
	2260	+ * @see #ACCESSIBLE_STATE_PROPERTY
	2261	+ * @see #ACCESSIBLE_VALUE_PROPERTY
	2262	+ * @see #ACCESSIBLE_SELECTION_PROPERTY
	2263	+ * @see #ACCESSIBLE_TEXT_PROPERTY
	2264	+ * @see #ACCESSIBLE_VISIBLE_DATA_PROPERTY
	2265	+ *
	2266	+ * @param listener The PropertyChangeListener to be added
	2267	+ */
	2268	+ public void addPropertyChangeListener(PropertyChangeListener listener) {
	2269	+ ac.addPropertyChangeListener(listener);
	2270	+ }
	2271	+
	2272	+ /**
	2273	+ * Removes a PropertyChangeListener from the listener list.
	2274	+ * This removes a PropertyChangeListener that was registered
	2275	+ * for all properties.
	2276	+ *
	2277	+ * @param listener The PropertyChangeListener to be removed
	2278	+ */
	2279	+ public void removePropertyChangeListener(PropertyChangeListener listener) {
	2280	+ ac.removePropertyChangeListener(listener);
	2281	+ }
	2282	+
	2283	+ /**
	2284	+ * Gets the AccessibleAction associated with this object that supports
	2285	+ * one or more actions.
	2286	+ *
	2287	+ * @return AccessibleAction if supported by object; else return null
	2288	+ * @see AccessibleAction
	2289	+ */
	2290	+ public AccessibleAction getAccessibleAction() {
	2291	+ return ac.getAccessibleAction();
	2292	+ }
	2293	+
	2294	+ /**
	2295	+ * Gets the AccessibleComponent associated with this object that has a
	2296	+ * graphical representation.
	2297	+ *
	2298	+ * @return AccessibleComponent if supported by object; else return null
	2299	+ * @see AccessibleComponent
	2300	+ */
	2301	+ public AccessibleComponent getAccessibleComponent() {
	2302	+ return ac.getAccessibleComponent();
	2303	+ }
	2304	+
	2305	+ /**
	2306	+ * Gets the AccessibleSelection associated with this object which allows its
	2307	+ * Accessible children to be selected.
	2308	+ *
	2309	+ * @return AccessibleSelection if supported by object; else return null
	2310	+ * @see AccessibleSelection
	2311	+ */
	2312	+ public AccessibleSelection getAccessibleSelection() {
	2313	+ return ac.getAccessibleSelection();
	2314	+ }
	2315	+
	2316	+ /**
	2317	+ * Gets the AccessibleText associated with this object presenting
	2318	+ * text on the display.
	2319	+ *
	2320	+ * @return AccessibleText if supported by object; else return null
	2321	+ * @see AccessibleText
	2322	+ */
	2323	+ public AccessibleText getAccessibleText() {
	2324	+ return ac.getAccessibleText();
	2325	+ }
	2326	+
	2327	+ /**
	2328	+ * Gets the AccessibleEditableText associated with this object
	2329	+ * presenting editable text on the display.
	2330	+ *
	2331	+ * @return AccessibleEditableText if supported by object; else return null
	2332	+ * @see AccessibleEditableText
	2333	+ */
	2334	+ public AccessibleEditableText getAccessibleEditableText() {
	2335	+ return ac.getAccessibleEditableText();
	2336	+ }
	2337	+
	2338	+ /**
	2339	+ * Gets the AccessibleValue associated with this object that supports a
	2340	+ * Numerical value.
	2341	+ *
	2342	+ * @return AccessibleValue if supported by object; else return null
	2343	+ * @see AccessibleValue
	2344	+ */
	2345	+ public AccessibleValue getAccessibleValue() {
	2346	+ return ac.getAccessibleValue();
	2347	+ }
	2348	+
	2349	+ /**
	2350	+ * Gets the AccessibleIcons associated with an object that has
	2351	+ * one or more associated icons
	2352	+ *
	2353	+ * @return an array of AccessibleIcon if supported by object;
	2354	+ * otherwise return null
	2355	+ * @see AccessibleIcon
	2356	+ */
	2357	+ public AccessibleIcon [] getAccessibleIcon() {
	2358	+ return ac.getAccessibleIcon();
	2359	+ }
	2360	+
	2361	+ /**
	2362	+ * Gets the AccessibleRelationSet associated with an object
	2363	+ *
	2364	+ * @return an AccessibleRelationSet if supported by object;
	2365	+ * otherwise return null
	2366	+ * @see AccessibleRelationSet
	2367	+ */
	2368	+ public AccessibleRelationSet getAccessibleRelationSet() {
	2369	+ return ac.getAccessibleRelationSet();
	2370	+ }
	2371	+
	2372	+ /**
	2373	+ * Gets the AccessibleTable associated with an object
	2374	+ *
	2375	+ * @return an AccessibleTable if supported by object;
	2376	+ * otherwise return null
	2377	+ * @see AccessibleTable
	2378	+ */
	2379	+ public AccessibleTable getAccessibleTable() {
	2380	+ return ac.getAccessibleTable();
	2381	+ }
	2382	+
	2383	+ /**
	2384	+ * Support for reporting bound property changes. If oldValue and
	2385	+ * newValue are not equal and the PropertyChangeEvent listener list
	2386	+ * is not empty, then fire a PropertyChange event to each listener.
	2387	+ * In general, this is for use by the Accessible objects themselves
	2388	+ * and should not be called by an application program.
	2389	+ * @param propertyName The programmatic name of the property that
	2390	+ * was changed.
	2391	+ * @param oldValue The old value of the property.
	2392	+ * @param newValue The new value of the property.
	2393	+ * @see java.beans.PropertyChangeSupport
	2394	+ * @see #addPropertyChangeListener
	2395	+ * @see #removePropertyChangeListener
	2396	+ * @see #ACCESSIBLE_NAME_PROPERTY
	2397	+ * @see #ACCESSIBLE_DESCRIPTION_PROPERTY
	2398	+ * @see #ACCESSIBLE_STATE_PROPERTY
	2399	+ * @see #ACCESSIBLE_VALUE_PROPERTY
	2400	+ * @see #ACCESSIBLE_SELECTION_PROPERTY
	2401	+ * @see #ACCESSIBLE_TEXT_PROPERTY
	2402	+ * @see #ACCESSIBLE_VISIBLE_DATA_PROPERTY
	2403	+ */
	2404	+ public void firePropertyChange(String propertyName,
	2405	+ Object oldValue,
	2406	+ Object newValue) {
	2407	+ ac.firePropertyChange(propertyName, oldValue, newValue);
	2408	+ }
	2409	+ }
	2410	+
	2411	+ } // innerclass AccessibleJComboBox
	2412	+}