| /* |
| * Copyright (c) 1995, 2008, 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.*; |
| import java.awt.peer.ChoicePeer; |
| import java.awt.event.*; |
| import java.util.EventListener; |
| import java.io.ObjectOutputStream; |
| import java.io.ObjectInputStream; |
| import java.io.IOException; |
| |
| import javax.accessibility.*; |
| |
| /** |
| * The <code>Choice</code> class presents a pop-up menu of choices. |
| * The current choice is displayed as the title of the menu. |
| * <p> |
| * The following code example produces a pop-up menu: |
| * <p> |
| * <hr><blockquote><pre> |
| * Choice ColorChooser = new Choice(); |
| * ColorChooser.add("Green"); |
| * ColorChooser.add("Red"); |
| * ColorChooser.add("Blue"); |
| * </pre></blockquote><hr> |
| * <p> |
| * After this choice menu has been added to a panel, |
| * it appears as follows in its normal state: |
| * <p> |
| * <img src="doc-files/Choice-1.gif" alt="The following text describes the graphic" |
| * ALIGN=center HSPACE=10 VSPACE=7> |
| * <p> |
| * In the picture, <code>"Green"</code> is the current choice. |
| * Pushing the mouse button down on the object causes a menu to |
| * appear with the current choice highlighted. |
| * <p> |
| * Some native platforms do not support arbitrary resizing of |
| * <code>Choice</code> components and the behavior of |
| * <code>setSize()/getSize()</code> is bound by |
| * such limitations. |
| * Native GUI <code>Choice</code> components' size are often bound by such |
| * attributes as font size and length of items contained within |
| * the <code>Choice</code>. |
| * <p> |
| * @author Sami Shaio |
| * @author Arthur van Hoff |
| * @since JDK1.0 |
| */ |
| public class Choice extends Component implements ItemSelectable, Accessible { |
| /** |
| * The items for the <code>Choice</code>. |
| * This can be a <code>null</code> value. |
| * @serial |
| * @see #add(String) |
| * @see #addItem(String) |
| * @see #getItem(int) |
| * @see #getItemCount() |
| * @see #insert(String, int) |
| * @see #remove(String) |
| */ |
| Vector pItems; |
| |
| /** |
| * The index of the current choice for this <code>Choice</code> |
| * or -1 if nothing is selected. |
| * @serial |
| * @see #getSelectedItem() |
| * @see #select(int) |
| */ |
| int selectedIndex = -1; |
| |
| transient ItemListener itemListener; |
| |
| private static final String base = "choice"; |
| private static int nameCounter = 0; |
| |
| /* |
| * JDK 1.1 serialVersionUID |
| */ |
| private static final long serialVersionUID = -4075310674757313071L; |
| |
| /** |
| * Creates a new choice menu. The menu initially has no items in it. |
| * <p> |
| * By default, the first item added to the choice menu becomes the |
| * selected item, until a different selection is made by the user |
| * by calling one of the <code>select</code> methods. |
| * @exception HeadlessException if GraphicsEnvironment.isHeadless() |
| * returns true |
| * @see java.awt.GraphicsEnvironment#isHeadless |
| * @see #select(int) |
| * @see #select(java.lang.String) |
| */ |
| public Choice() throws HeadlessException { |
| GraphicsEnvironment.checkHeadless(); |
| pItems = new Vector(); |
| } |
| |
| /** |
| * Constructs a name for this component. Called by |
| * <code>getName</code> when the name is <code>null</code>. |
| */ |
| String constructComponentName() { |
| synchronized (Choice.class) { |
| return base + nameCounter++; |
| } |
| } |
| |
| /** |
| * Creates the <code>Choice</code>'s peer. This peer allows us |
| * to change the look |
| * of the <code>Choice</code> without changing its functionality. |
| * @see java.awt.Toolkit#createChoice(java.awt.Choice) |
| * @see java.awt.Component#getToolkit() |
| */ |
| public void addNotify() { |
| synchronized (getTreeLock()) { |
| if (peer == null) |
| peer = getToolkit().createChoice(this); |
| super.addNotify(); |
| } |
| } |
| |
| /** |
| * Returns the number of items in this <code>Choice</code> menu. |
| * @return the number of items in this <code>Choice</code> menu |
| * @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 pItems.size(); |
| } |
| |
| /** |
| * Gets the string at the specified index in this |
| * <code>Choice</code> menu. |
| * @param index the index at which to begin |
| * @see #getItemCount |
| */ |
| public String getItem(int index) { |
| return getItemImpl(index); |
| } |
| |
| /* |
| * This is called by the native code, so client code can't |
| * be called on the toolkit thread. |
| */ |
| final String getItemImpl(int index) { |
| return (String)pItems.elementAt(index); |
| } |
| |
| /** |
| * Adds an item to this <code>Choice</code> menu. |
| * @param item the item to be added |
| * @exception NullPointerException if the item's value is |
| * <code>null</code> |
| * @since JDK1.1 |
| */ |
| public void add(String item) { |
| addItem(item); |
| } |
| |
| /** |
| * Obsolete as of Java 2 platform v1.1. Please use the |
| * <code>add</code> method instead. |
| * <p> |
| * Adds an item to this <code>Choice</code> menu. |
| * @param item the item to be added |
| * @exception NullPointerException if the item's value is equal to |
| * <code>null</code> |
| */ |
| public void addItem(String item) { |
| synchronized (this) { |
| insertNoInvalidate(item, pItems.size()); |
| } |
| |
| // This could change the preferred size of the Component. |
| invalidateIfValid(); |
| } |
| |
| /** |
| * Inserts an item to this <code>Choice</code>, |
| * but does not invalidate the <code>Choice</code>. |
| * Client methods must provide their own synchronization before |
| * invoking this method. |
| * @param item the item to be added |
| * @param index the new item position |
| * @exception NullPointerException if the item's value is equal to |
| * <code>null</code> |
| */ |
| private void insertNoInvalidate(String item, int index) { |
| if (item == null) { |
| throw new |
| NullPointerException("cannot add null item to Choice"); |
| } |
| pItems.insertElementAt(item, index); |
| ChoicePeer peer = (ChoicePeer)this.peer; |
| if (peer != null) { |
| peer.add(item, index); |
| } |
| // no selection or selection shifted up |
| if (selectedIndex < 0 || selectedIndex >= index) { |
| select(0); |
| } |
| } |
| |
| |
| /** |
| * Inserts the item into this choice at the specified position. |
| * Existing items at an index greater than or equal to |
| * <code>index</code> are shifted up by one to accommodate |
| * the new item. If <code>index</code> is greater than or |
| * equal to the number of items in this choice, |
| * <code>item</code> is added to the end of this choice. |
| * <p> |
| * If the item is the first one being added to the choice, |
| * then the item becomes selected. Otherwise, if the |
| * selected item was one of the items shifted, the first |
| * item in the choice becomes the selected item. If the |
| * selected item was no among those shifted, it remains |
| * the selected item. |
| * @param item the non-<code>null</code> item to be inserted |
| * @param index the position at which the item should be inserted |
| * @exception IllegalArgumentException if index is less than 0 |
| */ |
| public void insert(String item, int index) { |
| synchronized (this) { |
| if (index < 0) { |
| throw new IllegalArgumentException("index less than zero."); |
| } |
| /* if the index greater than item count, add item to the end */ |
| index = Math.min(index, pItems.size()); |
| |
| insertNoInvalidate(item, index); |
| } |
| |
| // This could change the preferred size of the Component. |
| invalidateIfValid(); |
| } |
| |
| /** |
| * Removes the first occurrence of <code>item</code> |
| * from the <code>Choice</code> menu. If the item |
| * being removed is the currently selected item, |
| * then the first item in the choice becomes the |
| * selected item. Otherwise, the currently selected |
| * item remains selected (and the selected index is |
| * updated accordingly). |
| * @param item the item to remove from this <code>Choice</code> menu |
| * @exception IllegalArgumentException if the item doesn't |
| * exist in the choice menu |
| * @since JDK1.1 |
| */ |
| public void remove(String item) { |
| synchronized (this) { |
| int index = pItems.indexOf(item); |
| if (index < 0) { |
| throw new IllegalArgumentException("item " + item + |
| " not found in choice"); |
| } else { |
| removeNoInvalidate(index); |
| } |
| } |
| |
| // This could change the preferred size of the Component. |
| invalidateIfValid(); |
| } |
| |
| /** |
| * Removes an item from the choice menu |
| * at the specified position. If the item |
| * being removed is the currently selected item, |
| * then the first item in the choice becomes the |
| * selected item. Otherwise, the currently selected |
| * item remains selected (and the selected index is |
| * updated accordingly). |
| * @param position the position of the item |
| * @throws IndexOutOfBoundsException if the specified |
| * position is out of bounds |
| * @since JDK1.1 |
| */ |
| public void remove(int position) { |
| synchronized (this) { |
| removeNoInvalidate(position); |
| } |
| |
| // This could change the preferred size of the Component. |
| invalidateIfValid(); |
| } |
| |
| /** |
| * Removes an item from the <code>Choice</code> at the |
| * specified position, but does not invalidate the <code>Choice</code>. |
| * Client methods must provide their |
| * own synchronization before invoking this method. |
| * @param position the position of the item |
| */ |
| private void removeNoInvalidate(int position) { |
| pItems.removeElementAt(position); |
| ChoicePeer peer = (ChoicePeer)this.peer; |
| if (peer != null) { |
| peer.remove(position); |
| } |
| /* Adjust selectedIndex if selected item was removed. */ |
| if (pItems.size() == 0) { |
| selectedIndex = -1; |
| } else if (selectedIndex == position) { |
| select(0); |
| } else if (selectedIndex > position) { |
| select(selectedIndex-1); |
| } |
| } |
| |
| |
| /** |
| * Removes all items from the choice menu. |
| * @see #remove |
| * @since JDK1.1 |
| */ |
| public void removeAll() { |
| synchronized (this) { |
| if (peer != null) { |
| ((ChoicePeer)peer).removeAll(); |
| } |
| pItems.removeAllElements(); |
| selectedIndex = -1; |
| } |
| |
| // This could change the preferred size of the Component. |
| invalidateIfValid(); |
| } |
| |
| /** |
| * Gets a representation of the current choice as a string. |
| * @return a string representation of the currently |
| * selected item in this choice menu |
| * @see #getSelectedIndex |
| */ |
| public synchronized String getSelectedItem() { |
| return (selectedIndex >= 0) ? getItem(selectedIndex) : null; |
| } |
| |
| /** |
| * Returns an array (length 1) containing the currently selected |
| * item. If this choice has no items, returns <code>null</code>. |
| * @see ItemSelectable |
| */ |
| public synchronized Object[] getSelectedObjects() { |
| if (selectedIndex >= 0) { |
| Object[] items = new Object[1]; |
| items[0] = getItem(selectedIndex); |
| return items; |
| } |
| return null; |
| } |
| |
| /** |
| * Returns the index of the currently selected item. |
| * If nothing is selected, returns -1. |
| * |
| * @return the index of the currently selected item, or -1 if nothing |
| * is currently selected |
| * @see #getSelectedItem |
| */ |
| public int getSelectedIndex() { |
| return selectedIndex; |
| } |
| |
| /** |
| * Sets the selected item in this <code>Choice</code> menu to be the |
| * item at the specified position. |
| * |
| * <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 pos the positon of the selected item |
| * @exception IllegalArgumentException if the specified |
| * position is greater than the |
| * number of items or less than zero |
| * @see #getSelectedItem |
| * @see #getSelectedIndex |
| */ |
| public synchronized void select(int pos) { |
| if ((pos >= pItems.size()) || (pos < 0)) { |
| throw new IllegalArgumentException("illegal Choice item position: " + pos); |
| } |
| if (pItems.size() > 0) { |
| selectedIndex = pos; |
| ChoicePeer peer = (ChoicePeer)this.peer; |
| if (peer != null) { |
| peer.select(pos); |
| } |
| } |
| } |
| |
| /** |
| * Sets the selected item in this <code>Choice</code> menu |
| * to be the item whose name is equal to the specified string. |
| * If more than one item matches (is equal to) the specified string, |
| * the one with the smallest index is selected. |
| * |
| * <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 str the specified string |
| * @see #getSelectedItem |
| * @see #getSelectedIndex |
| */ |
| public synchronized void select(String str) { |
| int index = pItems.indexOf(str); |
| if (index >= 0) { |
| select(index); |
| } |
| } |
| |
| /** |
| * Adds the specified item listener to receive item events from |
| * this <code>Choice</code> menu. Item events are sent in response |
| * to user input, but not in response to calls to <code>select</code>. |
| * If l 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 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 <code>Choice</code> menu. |
| * If l 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 choice. |
| * |
| * @return all of this choice'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 (ItemListener[])(getListeners(ItemListener.class)); |
| } |
| |
| /** |
| * Returns an array of all the objects currently registered |
| * as <code><em>Foo</em>Listener</code>s |
| * upon this <code>Choice</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>Choice</code> <code>c</code> |
| * for its item listeners with the following code: |
| * |
| * <pre>ItemListener[] ils = (ItemListener[])(c.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 choice, |
| * 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 == 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) { |
| if (e.id == ItemEvent.ITEM_STATE_CHANGED) { |
| if ((eventMask & AWTEvent.ITEM_EVENT_MASK) != 0 || |
| itemListener != null) { |
| return true; |
| } |
| return false; |
| } |
| return super.eventEnabled(e); |
| } |
| |
| /** |
| * Processes events on this choice. If the event is an |
| * instance of <code>ItemEvent</code>, it invokes the |
| * <code>processItemEvent</code> method. Otherwise, it calls its |
| * superclass's <code>processEvent</code> method. |
| * <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.ItemEvent |
| * @see #processItemEvent |
| * @since JDK1.1 |
| */ |
| protected void processEvent(AWTEvent e) { |
| if (e instanceof ItemEvent) { |
| processItemEvent((ItemEvent)e); |
| return; |
| } |
| super.processEvent(e); |
| } |
| |
| /** |
| * Processes item events occurring on this <code>Choice</code> |
| * menu 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: |
| * <p><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(ItemListener) |
| * @see java.awt.Component#enableEvents |
| * @since JDK1.1 |
| */ |
| protected void processItemEvent(ItemEvent e) { |
| ItemListener listener = itemListener; |
| if (listener != null) { |
| listener.itemStateChanged(e); |
| } |
| } |
| |
| /** |
| * Returns a string representing the state of this <code>Choice</code> |
| * menu. This method is intended to be used only for debugging purposes, |
| * and the content and format of the returned string may vary between |
| * implementations. The returned string may be empty but may not be |
| * <code>null</code>. |
| * |
| * @return the parameter string of this <code>Choice</code> menu |
| */ |
| protected String paramString() { |
| return super.paramString() + ",current=" + getSelectedItem(); |
| } |
| |
| |
| /* Serialization support. |
| */ |
| |
| /* |
| * Choice Serial Data Version. |
| * @serial |
| */ |
| private int choiceSerializedDataVersion = 1; |
| |
| /** |
| * Writes default serializable fields to stream. Writes |
| * a list of serializable <code>ItemListeners</code> |
| * as optional data. The non-serializable |
| * <code>ItemListeners</code> are detected and |
| * no attempt is made to serialize them. |
| * |
| * @param s the <code>ObjectOutputStream</code> to write |
| * @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 |
| * |
| * @see AWTEventMulticaster#save(ObjectOutputStream, String, EventListener) |
| * @see java.awt.Component#itemListenerK |
| * @see #readObject(ObjectInputStream) |
| */ |
| private void writeObject(ObjectOutputStream s) |
| throws java.io.IOException |
| { |
| s.defaultWriteObject(); |
| |
| AWTEventMulticaster.save(s, itemListenerK, itemListener); |
| s.writeObject(null); |
| } |
| |
| /** |
| * Reads the <code>ObjectInputStream</code> and if it |
| * isn't <code>null</code> adds a listener to receive |
| * item events fired by the <code>Choice</code> item. |
| * Unrecognized keys or values will be ignored. |
| * |
| * @param s the <code>ObjectInputStream</code> to read |
| * @exception HeadlessException if |
| * <code>GraphicsEnvironment.isHeadless</code> returns |
| * <code>true</code> |
| * @serial |
| * @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 // skip value for unrecognized key |
| s.readObject(); |
| } |
| } |
| |
| |
| ///////////////// |
| // Accessibility support |
| //////////////// |
| |
| |
| /** |
| * Gets the <code>AccessibleContext</code> associated with this |
| * <code>Choice</code>. For <code>Choice</code> components, |
| * the <code>AccessibleContext</code> takes the form of an |
| * <code>AccessibleAWTChoice</code>. A new <code>AccessibleAWTChoice</code> |
| * instance is created if necessary. |
| * |
| * @return an <code>AccessibleAWTChoice</code> that serves as the |
| * <code>AccessibleContext</code> of this <code>Choice</code> |
| * @since 1.3 |
| */ |
| public AccessibleContext getAccessibleContext() { |
| if (accessibleContext == null) { |
| accessibleContext = new AccessibleAWTChoice(); |
| } |
| return accessibleContext; |
| } |
| |
| /** |
| * This class implements accessibility support for the |
| * <code>Choice</code> class. It provides an implementation of the |
| * Java Accessibility API appropriate to choice user-interface elements. |
| * @since 1.3 |
| */ |
| protected class AccessibleAWTChoice extends AccessibleAWTComponent |
| implements AccessibleAction |
| { |
| /* |
| * JDK 1.3 serialVersionUID |
| */ |
| private static final long serialVersionUID = 7175603582428509322L; |
| |
| public AccessibleAWTChoice() { |
| super(); |
| } |
| |
| /** |
| * Get the AccessibleAction associated with this object. In the |
| * implementation of the Java Accessibility API for this class, |
| * return this object, which is responsible for implementing the |
| * AccessibleAction interface on behalf of itself. |
| * |
| * @return this object |
| * @see AccessibleAction |
| */ |
| public AccessibleAction getAccessibleAction() { |
| return this; |
| } |
| |
| /** |
| * Get the role of this object. |
| * |
| * @return an instance of AccessibleRole describing the role of the |
| * object |
| * @see AccessibleRole |
| */ |
| public AccessibleRole getAccessibleRole() { |
| return AccessibleRole.COMBO_BOX; |
| } |
| |
| /** |
| * Returns the number of accessible actions available in this object |
| * If there are more than one, the first one is considered the "default" |
| * action of the object. |
| * |
| * @return the zero-based number of Actions in this object |
| */ |
| public int getAccessibleActionCount() { |
| return 0; // To be fully implemented in a future release |
| } |
| |
| /** |
| * Returns a description of the specified action of the object. |
| * |
| * @param i zero-based index of the actions |
| * @return a String description of the action |
| * @see #getAccessibleActionCount |
| */ |
| public String getAccessibleActionDescription(int i) { |
| return null; // To be fully implemented in a future release |
| } |
| |
| /** |
| * Perform the specified Action on the object |
| * |
| * @param i zero-based index of actions |
| * @return true if the action was performed; otherwise false. |
| * @see #getAccessibleActionCount |
| */ |
| public boolean doAccessibleAction(int i) { |
| return false; // To be fully implemented in a future release |
| } |
| |
| } // inner class AccessibleAWTChoice |
| |
| } |
