| /* |
| * Copyright (c) 1995, 2016, 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.awt.event.ActionEvent; |
| import java.awt.event.ActionListener; |
| import java.awt.event.InputEvent; |
| import java.awt.event.KeyEvent; |
| import java.awt.peer.MenuItemPeer; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.util.EventListener; |
| |
| import javax.accessibility.Accessible; |
| import javax.accessibility.AccessibleAction; |
| import javax.accessibility.AccessibleContext; |
| import javax.accessibility.AccessibleRole; |
| import javax.accessibility.AccessibleValue; |
| |
| import sun.awt.AWTAccessor; |
| |
| /** |
| * All items in a menu must belong to the class |
| * {@code MenuItem}, or one of its subclasses. |
| * <p> |
| * The default {@code MenuItem} object embodies |
| * a simple labeled menu item. |
| * <p> |
| * This picture of a menu bar shows five menu items: |
| * <IMG SRC="doc-files/MenuBar-1.gif" alt="The following text describes this graphic." |
| * style="float:center; margin: 7px 10px;"> |
| * <br style="clear:left;"> |
| * The first two items are simple menu items, labeled |
| * {@code "Basic"} and {@code "Simple"}. |
| * Following these two items is a separator, which is itself |
| * a menu item, created with the label {@code "-"}. |
| * Next is an instance of {@code CheckboxMenuItem} |
| * labeled {@code "Check"}. The final menu item is a |
| * submenu labeled <code>"More Examples"</code>, |
| * and this submenu is an instance of {@code Menu}. |
| * <p> |
| * When a menu item is selected, AWT sends an action event to |
| * the menu item. Since the event is an |
| * instance of {@code ActionEvent}, the {@code processEvent} |
| * method examines the event and passes it along to |
| * {@code processActionEvent}. The latter method redirects the |
| * event to any {@code ActionListener} objects that have |
| * registered an interest in action events generated by this |
| * menu item. |
| * <P> |
| * Note that the subclass {@code Menu} overrides this behavior and |
| * does not send any event to the frame until one of its subitems is |
| * selected. |
| * |
| * @author Sami Shaio |
| */ |
| public class MenuItem extends MenuComponent implements Accessible { |
| |
| static { |
| /* ensure that the necessary native libraries are loaded */ |
| Toolkit.loadLibraries(); |
| if (!GraphicsEnvironment.isHeadless()) { |
| initIDs(); |
| } |
| |
| AWTAccessor.setMenuItemAccessor( |
| new AWTAccessor.MenuItemAccessor() { |
| public boolean isEnabled(MenuItem item) { |
| return item.enabled; |
| } |
| |
| public String getLabel(MenuItem item) { |
| return item.label; |
| } |
| |
| public MenuShortcut getShortcut(MenuItem item) { |
| return item.shortcut; |
| } |
| |
| public String getActionCommandImpl(MenuItem item) { |
| return item.getActionCommandImpl(); |
| } |
| |
| public boolean isItemEnabled(MenuItem item) { |
| return item.isItemEnabled(); |
| } |
| }); |
| } |
| |
| /** |
| * A value to indicate whether a menu item is enabled |
| * or not. If it is enabled, {@code enabled} will |
| * be set to true. Else {@code enabled} will |
| * be set to false. |
| * |
| * @serial |
| * @see #isEnabled() |
| * @see #setEnabled(boolean) |
| */ |
| private volatile boolean enabled = true; |
| |
| /** |
| * {@code label} is the label of a menu item. |
| * It can be any string. |
| * |
| * @serial |
| * @see #getLabel() |
| * @see #setLabel(String) |
| */ |
| volatile String label; |
| |
| /** |
| * This field indicates the command that has been issued |
| * by a particular menu item. |
| * By default the {@code actionCommand} |
| * is the label of the menu item, unless it has been |
| * set using setActionCommand. |
| * |
| * @serial |
| * @see #setActionCommand(String) |
| * @see #getActionCommand() |
| */ |
| private volatile String actionCommand; |
| |
| /** |
| * The eventMask is ONLY set by subclasses via enableEvents. |
| * The mask should NOT be set when listeners are registered |
| * so that we can distinguish the difference between when |
| * listeners request events and subclasses request them. |
| * |
| * @serial |
| */ |
| volatile long eventMask; |
| |
| private transient volatile ActionListener actionListener; |
| |
| /** |
| * A sequence of key stokes that ia associated with |
| * a menu item. |
| * Note :in 1.1.2 you must use setActionCommand() |
| * on a menu item in order for its shortcut to |
| * work. |
| * |
| * @serial |
| * @see #getShortcut() |
| * @see #setShortcut(MenuShortcut) |
| * @see #deleteShortcut() |
| */ |
| private volatile MenuShortcut shortcut; |
| |
| private static final String base = "menuitem"; |
| private static int nameCounter = 0; |
| |
| /* |
| * JDK 1.1 serialVersionUID |
| */ |
| private static final long serialVersionUID = -21757335363267194L; |
| |
| /** |
| * Constructs a new MenuItem with an empty label and no keyboard |
| * shortcut. |
| * @exception HeadlessException if GraphicsEnvironment.isHeadless() |
| * returns true. |
| * @see java.awt.GraphicsEnvironment#isHeadless |
| * @since 1.1 |
| */ |
| public MenuItem() throws HeadlessException { |
| this("", null); |
| } |
| |
| /** |
| * Constructs a new MenuItem with the specified label |
| * and no keyboard shortcut. Note that use of "-" in |
| * a label is reserved to indicate a separator between |
| * menu items. By default, all menu items except for |
| * separators are enabled. |
| * @param label the label for this menu item. |
| * @exception HeadlessException if GraphicsEnvironment.isHeadless() |
| * returns true. |
| * @see java.awt.GraphicsEnvironment#isHeadless |
| * @since 1.0 |
| */ |
| public MenuItem(String label) throws HeadlessException { |
| this(label, null); |
| } |
| |
| /** |
| * Create a menu item with an associated keyboard shortcut. |
| * Note that use of "-" in a label is reserved to indicate |
| * a separator between menu items. By default, all menu |
| * items except for separators are enabled. |
| * @param label the label for this menu item. |
| * @param s the instance of {@code MenuShortcut} |
| * associated with this menu item. |
| * @exception HeadlessException if GraphicsEnvironment.isHeadless() |
| * returns true. |
| * @see java.awt.GraphicsEnvironment#isHeadless |
| * @since 1.1 |
| */ |
| public MenuItem(String label, MenuShortcut s) throws HeadlessException { |
| this.label = label; |
| this.shortcut = s; |
| } |
| |
| /** |
| * Construct a name for this MenuComponent. Called by getName() when |
| * the name is null. |
| */ |
| String constructComponentName() { |
| synchronized (MenuItem.class) { |
| return base + nameCounter++; |
| } |
| } |
| |
| /** |
| * Creates the menu item's peer. The peer allows us to modify the |
| * appearance of the menu item without changing its functionality. |
| */ |
| public void addNotify() { |
| synchronized (getTreeLock()) { |
| if (peer == null) |
| peer = getComponentFactory().createMenuItem(this); |
| } |
| } |
| |
| /** |
| * Gets the label for this menu item. |
| * @return the label of this menu item, or {@code null} |
| if this menu item has no label. |
| * @see java.awt.MenuItem#setLabel |
| * @since 1.0 |
| */ |
| public String getLabel() { |
| return label; |
| } |
| |
| /** |
| * Sets the label for this menu item to the specified label. |
| * @param label the new label, or {@code null} for no label. |
| * @see java.awt.MenuItem#getLabel |
| * @since 1.0 |
| */ |
| public synchronized void setLabel(String label) { |
| this.label = label; |
| MenuItemPeer peer = (MenuItemPeer)this.peer; |
| if (peer != null) { |
| peer.setLabel(label); |
| } |
| } |
| |
| /** |
| * Checks whether this menu item is enabled. |
| * |
| * @return {@code true} if the item is enabled; |
| * otherwise {@code false} |
| * @see java.awt.MenuItem#setEnabled |
| * @since 1.0 |
| */ |
| public boolean isEnabled() { |
| return enabled; |
| } |
| |
| /** |
| * Sets whether or not this menu item can be chosen. |
| * @param b if {@code true}, enables this menu item; |
| * if {@code false}, disables it. |
| * @see java.awt.MenuItem#isEnabled |
| * @since 1.1 |
| */ |
| public synchronized void setEnabled(boolean b) { |
| enable(b); |
| } |
| |
| /** |
| * @deprecated As of JDK version 1.1, |
| * replaced by {@code setEnabled(boolean)}. |
| */ |
| @Deprecated |
| public synchronized void enable() { |
| enabled = true; |
| MenuItemPeer peer = (MenuItemPeer)this.peer; |
| if (peer != null) { |
| peer.setEnabled(true); |
| } |
| } |
| |
| /** |
| * Sets whether or not this menu item can be chosen. |
| * |
| * @param b if {@code true}, enables this menu item; |
| * otherwise disables |
| * @deprecated As of JDK version 1.1, |
| * replaced by {@code setEnabled(boolean)}. |
| */ |
| @Deprecated |
| public void enable(boolean b) { |
| if (b) { |
| enable(); |
| } else { |
| disable(); |
| } |
| } |
| |
| /** |
| * @deprecated As of JDK version 1.1, |
| * replaced by {@code setEnabled(boolean)}. |
| */ |
| @Deprecated |
| public synchronized void disable() { |
| enabled = false; |
| MenuItemPeer peer = (MenuItemPeer)this.peer; |
| if (peer != null) { |
| peer.setEnabled(false); |
| } |
| } |
| |
| /** |
| * Get the {@code MenuShortcut} object associated with this |
| * menu item, |
| * @return the menu shortcut associated with this menu item, |
| * or {@code null} if none has been specified. |
| * @see java.awt.MenuItem#setShortcut |
| * @since 1.1 |
| */ |
| public MenuShortcut getShortcut() { |
| return shortcut; |
| } |
| |
| /** |
| * Set the {@code MenuShortcut} object associated with this |
| * menu item. If a menu shortcut is already associated with |
| * this menu item, it is replaced. |
| * @param s the menu shortcut to associate |
| * with this menu item. |
| * @see java.awt.MenuItem#getShortcut |
| * @since 1.1 |
| */ |
| public void setShortcut(MenuShortcut s) { |
| shortcut = s; |
| MenuItemPeer peer = (MenuItemPeer)this.peer; |
| if (peer != null) { |
| peer.setLabel(label); |
| } |
| } |
| |
| /** |
| * Delete any {@code MenuShortcut} object associated |
| * with this menu item. |
| * @since 1.1 |
| */ |
| public void deleteShortcut() { |
| shortcut = null; |
| MenuItemPeer peer = (MenuItemPeer)this.peer; |
| if (peer != null) { |
| peer.setLabel(label); |
| } |
| } |
| |
| /* |
| * Delete a matching MenuShortcut associated with this MenuItem. |
| * Used when iterating Menus. |
| */ |
| void deleteShortcut(MenuShortcut s) { |
| if (s.equals(shortcut)) { |
| shortcut = null; |
| MenuItemPeer peer = (MenuItemPeer)this.peer; |
| if (peer != null) { |
| peer.setLabel(label); |
| } |
| } |
| } |
| |
| /* |
| * The main goal of this method is to post an appropriate event |
| * to the event queue when menu shortcut is pressed. However, |
| * in subclasses this method may do more than just posting |
| * an event. |
| */ |
| void doMenuEvent(long when, int modifiers) { |
| Toolkit.getEventQueue().postEvent( |
| new ActionEvent(this, ActionEvent.ACTION_PERFORMED, |
| getActionCommand(), when, modifiers)); |
| } |
| |
| /* |
| * Returns true if the item and all its ancestors are |
| * enabled, false otherwise |
| */ |
| private final boolean isItemEnabled() { |
| // Fix For 6185151: Menu shortcuts of all menuitems within a menu |
| // should be disabled when the menu itself is disabled |
| if (!isEnabled()) { |
| return false; |
| } |
| MenuContainer container = getParent_NoClientCode(); |
| do { |
| if (!(container instanceof Menu)) { |
| return true; |
| } |
| Menu menu = (Menu)container; |
| if (!menu.isEnabled()) { |
| return false; |
| } |
| container = menu.getParent_NoClientCode(); |
| } while (container != null); |
| return true; |
| } |
| |
| /* |
| * Post an ActionEvent to the target (on |
| * keydown) and the item is enabled. |
| * Returns true if there is an associated shortcut. |
| */ |
| boolean handleShortcut(KeyEvent e) { |
| MenuShortcut s = new MenuShortcut(e.getKeyCode(), |
| (e.getModifiers() & InputEvent.SHIFT_MASK) > 0); |
| MenuShortcut sE = new MenuShortcut(e.getExtendedKeyCode(), |
| (e.getModifiers() & InputEvent.SHIFT_MASK) > 0); |
| // Fix For 6185151: Menu shortcuts of all menuitems within a menu |
| // should be disabled when the menu itself is disabled |
| if ((s.equals(shortcut) || sE.equals(shortcut)) && isItemEnabled()) { |
| // MenuShortcut match -- issue an event on keydown. |
| if (e.getID() == KeyEvent.KEY_PRESSED) { |
| doMenuEvent(e.getWhen(), e.getModifiers()); |
| } else { |
| // silently eat key release. |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| MenuItem getShortcutMenuItem(MenuShortcut s) { |
| return (s.equals(shortcut)) ? this : null; |
| } |
| |
| /** |
| * Enables event delivery to this menu item for events |
| * to be defined by the specified event mask parameter |
| * <p> |
| * Since event types are automatically enabled when a listener for |
| * that type is added to the menu item, this method only needs |
| * to be invoked by subclasses of {@code MenuItem} which desire to |
| * have the specified event types delivered to {@code processEvent} |
| * regardless of whether a listener is registered. |
| * |
| * @param eventsToEnable the event mask defining the event types |
| * @see java.awt.MenuItem#processEvent |
| * @see java.awt.MenuItem#disableEvents |
| * @see java.awt.Component#enableEvents |
| * @since 1.1 |
| */ |
| protected final void enableEvents(long eventsToEnable) { |
| eventMask |= eventsToEnable; |
| newEventsOnly = true; |
| } |
| |
| /** |
| * Disables event delivery to this menu item for events |
| * defined by the specified event mask parameter. |
| * |
| * @param eventsToDisable the event mask defining the event types |
| * @see java.awt.MenuItem#processEvent |
| * @see java.awt.MenuItem#enableEvents |
| * @see java.awt.Component#disableEvents |
| * @since 1.1 |
| */ |
| protected final void disableEvents(long eventsToDisable) { |
| eventMask &= ~eventsToDisable; |
| } |
| |
| /** |
| * Sets the command name of the action event that is fired |
| * by this menu item. |
| * <p> |
| * By default, the action command is set to the label of |
| * the menu item. |
| * @param command the action command to be set |
| * for this menu item. |
| * @see java.awt.MenuItem#getActionCommand |
| * @since 1.1 |
| */ |
| public void setActionCommand(String command) { |
| actionCommand = command; |
| } |
| |
| /** |
| * Gets the command name of the action event that is fired |
| * by this menu item. |
| * |
| * @return the action command name |
| * @see java.awt.MenuItem#setActionCommand |
| * @since 1.1 |
| */ |
| public String getActionCommand() { |
| return getActionCommandImpl(); |
| } |
| |
| // This is final so it can be called on the Toolkit thread. |
| final String getActionCommandImpl() { |
| return (actionCommand == null? label : actionCommand); |
| } |
| |
| /** |
| * Adds the specified action listener to receive action events |
| * from this menu item. |
| * If l is null, no exception is thrown and no action is performed. |
| * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads" |
| * >AWT Threading Issues</a> for details on AWT's threading model. |
| * |
| * @param l the action listener. |
| * @see #removeActionListener |
| * @see #getActionListeners |
| * @see java.awt.event.ActionEvent |
| * @see java.awt.event.ActionListener |
| * @since 1.1 |
| */ |
| public synchronized void addActionListener(ActionListener l) { |
| if (l == null) { |
| return; |
| } |
| actionListener = AWTEventMulticaster.add(actionListener, l); |
| newEventsOnly = true; |
| } |
| |
| /** |
| * Removes the specified action listener so it no longer receives |
| * action events from this menu item. |
| * If l is null, no exception is thrown and no action is performed. |
| * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads" |
| * >AWT Threading Issues</a> for details on AWT's threading model. |
| * |
| * @param l the action listener. |
| * @see #addActionListener |
| * @see #getActionListeners |
| * @see java.awt.event.ActionEvent |
| * @see java.awt.event.ActionListener |
| * @since 1.1 |
| */ |
| public synchronized void removeActionListener(ActionListener l) { |
| if (l == null) { |
| return; |
| } |
| actionListener = AWTEventMulticaster.remove(actionListener, l); |
| } |
| |
| /** |
| * Returns an array of all the action listeners |
| * registered on this menu item. |
| * |
| * @return all of this menu item's {@code ActionListener}s |
| * or an empty array if no action |
| * listeners are currently registered |
| * |
| * @see #addActionListener |
| * @see #removeActionListener |
| * @see java.awt.event.ActionEvent |
| * @see java.awt.event.ActionListener |
| * @since 1.4 |
| */ |
| public synchronized ActionListener[] getActionListeners() { |
| return getListeners(ActionListener.class); |
| } |
| |
| /** |
| * Returns an array of all the objects currently registered |
| * as <code><em>Foo</em>Listener</code>s |
| * upon this {@code MenuItem}. |
| * <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} argument |
| * with a class literal, such as |
| * <code><em>Foo</em>Listener.class</code>. |
| * For example, you can query a |
| * {@code MenuItem m} |
| * for its action listeners with the following code: |
| * |
| * <pre>ActionListener[] als = (ActionListener[])(m.getListeners(ActionListener.class));</pre> |
| * |
| * If no such listeners exist, this method returns an empty array. |
| * |
| * @param <T> the type of the listeners |
| * @param listenerType the type of listeners requested; this parameter |
| * should specify an interface that descends from |
| * {@code java.util.EventListener} |
| * @return an array of all objects registered as |
| * <code><em>Foo</em>Listener</code>s on this menu item, |
| * or an empty array if no such |
| * listeners have been added |
| * @exception ClassCastException if {@code listenerType} |
| * doesn't specify a class or interface that implements |
| * {@code java.util.EventListener} |
| * |
| * @see #getActionListeners |
| * @since 1.3 |
| */ |
| public <T extends EventListener> T[] getListeners(Class<T> listenerType) { |
| EventListener l = null; |
| if (listenerType == ActionListener.class) { |
| l = actionListener; |
| } |
| return AWTEventMulticaster.getListeners(l, listenerType); |
| } |
| |
| /** |
| * Processes events on this menu item. If the event is an |
| * instance of {@code ActionEvent}, it invokes |
| * {@code processActionEvent}, another method |
| * defined by {@code MenuItem}. |
| * <p> |
| * Currently, menu items only support action events. |
| * <p>Note that if the event parameter is {@code null} |
| * the behavior is unspecified and may result in an |
| * exception. |
| * |
| * @param e the event |
| * @see java.awt.MenuItem#processActionEvent |
| * @since 1.1 |
| */ |
| protected void processEvent(AWTEvent e) { |
| if (e instanceof ActionEvent) { |
| processActionEvent((ActionEvent)e); |
| } |
| } |
| |
| // REMIND: remove when filtering is done at lower level |
| boolean eventEnabled(AWTEvent e) { |
| if (e.id == ActionEvent.ACTION_PERFORMED) { |
| if ((eventMask & AWTEvent.ACTION_EVENT_MASK) != 0 || |
| actionListener != null) { |
| return true; |
| } |
| return false; |
| } |
| return super.eventEnabled(e); |
| } |
| |
| /** |
| * Processes action events occurring on this menu item, |
| * by dispatching them to any registered |
| * {@code ActionListener} objects. |
| * This method is not called unless action events are |
| * enabled for this component. Action events are enabled |
| * when one of the following occurs: |
| * <ul> |
| * <li>An {@code ActionListener} object is registered |
| * via {@code addActionListener}. |
| * <li>Action events are enabled via {@code enableEvents}. |
| * </ul> |
| * <p>Note that if the event parameter is {@code null} |
| * the behavior is unspecified and may result in an |
| * exception. |
| * |
| * @param e the action event |
| * @see java.awt.event.ActionEvent |
| * @see java.awt.event.ActionListener |
| * @see java.awt.MenuItem#enableEvents |
| * @since 1.1 |
| */ |
| protected void processActionEvent(ActionEvent e) { |
| ActionListener listener = actionListener; |
| if (listener != null) { |
| listener.actionPerformed(e); |
| } |
| } |
| |
| /** |
| * Returns a string representing the state of this {@code MenuItem}. |
| * 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}. |
| * |
| * @return the parameter string of this menu item |
| */ |
| public String paramString() { |
| String str = ",label=" + label; |
| if (shortcut != null) { |
| str += ",shortcut=" + shortcut; |
| } |
| return super.paramString() + str; |
| } |
| |
| |
| /* Serialization support. |
| */ |
| |
| /** |
| * Menu item serialized data version. |
| * |
| * @serial |
| */ |
| private int menuItemSerializedDataVersion = 1; |
| |
| /** |
| * Writes default serializable fields to stream. Writes |
| * a list of serializable {@code ActionListeners} |
| * as optional data. The non-serializable listeners are |
| * detected and no attempt is made to serialize them. |
| * |
| * @param s the {@code ObjectOutputStream} to write |
| * @serialData {@code null} terminated sequence of 0 |
| * or more pairs; the pair consists of a {@code String} |
| * and an {@code Object}; the {@code String} |
| * indicates the type of object and is one of the following: |
| * {@code actionListenerK} indicating an |
| * {@code ActionListener} object |
| * |
| * @see AWTEventMulticaster#save(ObjectOutputStream, String, EventListener) |
| * @see #readObject(ObjectInputStream) |
| */ |
| private void writeObject(ObjectOutputStream s) |
| throws IOException |
| { |
| s.defaultWriteObject(); |
| |
| AWTEventMulticaster.save(s, actionListenerK, actionListener); |
| s.writeObject(null); |
| } |
| |
| /** |
| * Reads the {@code ObjectInputStream} and if it |
| * isn't {@code null} adds a listener to receive |
| * action events fired by the {@code Menu} Item. |
| * Unrecognized keys or values will be ignored. |
| * |
| * @param s the {@code ObjectInputStream} to read |
| * @exception HeadlessException if |
| * {@code GraphicsEnvironment.isHeadless} returns |
| * {@code true} |
| * @see #removeActionListener(ActionListener) |
| * @see #addActionListener(ActionListener) |
| * @see #writeObject(ObjectOutputStream) |
| */ |
| private void readObject(ObjectInputStream s) |
| throws ClassNotFoundException, IOException, HeadlessException |
| { |
| // HeadlessException will be thrown from MenuComponent's readObject |
| s.defaultReadObject(); |
| |
| Object keyOrNull; |
| while(null != (keyOrNull = s.readObject())) { |
| String key = ((String)keyOrNull).intern(); |
| |
| if (actionListenerK == key) |
| addActionListener((ActionListener)(s.readObject())); |
| |
| else // skip value for unrecognized key |
| s.readObject(); |
| } |
| } |
| |
| /** |
| * Initialize JNI field and method IDs |
| */ |
| private static native void initIDs(); |
| |
| |
| ///////////////// |
| // Accessibility support |
| //////////////// |
| |
| /** |
| * Gets the AccessibleContext associated with this MenuItem. |
| * For menu items, the AccessibleContext takes the form of an |
| * AccessibleAWTMenuItem. |
| * A new AccessibleAWTMenuItem instance is created if necessary. |
| * |
| * @return an AccessibleAWTMenuItem that serves as the |
| * AccessibleContext of this MenuItem |
| * @since 1.3 |
| */ |
| public AccessibleContext getAccessibleContext() { |
| if (accessibleContext == null) { |
| accessibleContext = new AccessibleAWTMenuItem(); |
| } |
| return accessibleContext; |
| } |
| |
| /** |
| * Inner class of MenuItem used to provide default support for |
| * accessibility. This class is not meant to be used directly by |
| * application developers, but is instead meant only to be |
| * subclassed by menu component developers. |
| * <p> |
| * This class implements accessibility support for the |
| * {@code MenuItem} class. It provides an implementation of the |
| * Java Accessibility API appropriate to menu item user-interface elements. |
| * @since 1.3 |
| */ |
| protected class AccessibleAWTMenuItem extends AccessibleAWTMenuComponent |
| implements AccessibleAction, AccessibleValue |
| { |
| /* |
| * JDK 1.3 serialVersionUID |
| */ |
| private static final long serialVersionUID = -217847831945965825L; |
| |
| /** |
| * Get the accessible name of this object. |
| * |
| * @return the localized name of the object -- can be null if this |
| * object does not have a name |
| */ |
| public String getAccessibleName() { |
| if (accessibleName != null) { |
| return accessibleName; |
| } else { |
| if (getLabel() == null) { |
| return super.getAccessibleName(); |
| } else { |
| return getLabel(); |
| } |
| } |
| } |
| |
| /** |
| * Get the role of this object. |
| * |
| * @return an instance of AccessibleRole describing the role of the |
| * object |
| */ |
| public AccessibleRole getAccessibleRole() { |
| return AccessibleRole.MENU_ITEM; |
| } |
| |
| /** |
| * 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 |
| */ |
| public AccessibleAction getAccessibleAction() { |
| return this; |
| } |
| |
| /** |
| * Get the AccessibleValue associated with this object. In the |
| * implementation of the Java Accessibility API for this class, |
| * return this object, which is responsible for implementing the |
| * AccessibleValue interface on behalf of itself. |
| * |
| * @return this object |
| */ |
| public AccessibleValue getAccessibleValue() { |
| return this; |
| } |
| |
| /** |
| * Returns the number of Actions available in this object. The |
| * default behavior of a menu item is to have one action. |
| * |
| * @return 1, the number of Actions in this object |
| */ |
| public int getAccessibleActionCount() { |
| return 1; |
| } |
| |
| /** |
| * Return a description of the specified action of the object. |
| * |
| * @param i zero-based index of the actions |
| */ |
| public String getAccessibleActionDescription(int i) { |
| if (i == 0) { |
| // [[[PENDING: WDW -- need to provide a localized string]]] |
| return "click"; |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Perform the specified Action on the object |
| * |
| * @param i zero-based index of actions |
| * @return true if the action was performed; otherwise false. |
| */ |
| public boolean doAccessibleAction(int i) { |
| if (i == 0) { |
| // Simulate a button click |
| Toolkit.getEventQueue().postEvent( |
| new ActionEvent(MenuItem.this, |
| ActionEvent.ACTION_PERFORMED, |
| MenuItem.this.getActionCommand(), |
| EventQueue.getMostRecentEventTime(), |
| 0)); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| /** |
| * Get the value of this object as a Number. |
| * |
| * @return An Integer of 0 if this isn't selected or an Integer of 1 if |
| * this is selected. |
| * @see javax.swing.AbstractButton#isSelected() |
| */ |
| public Number getCurrentAccessibleValue() { |
| return Integer.valueOf(0); |
| } |
| |
| /** |
| * Set the value of this object as a Number. |
| * |
| * @return True if the value was set. |
| */ |
| public boolean setCurrentAccessibleValue(Number n) { |
| return false; |
| } |
| |
| /** |
| * Get the minimum value of this object as a Number. |
| * |
| * @return An Integer of 0. |
| */ |
| public Number getMinimumAccessibleValue() { |
| return Integer.valueOf(0); |
| } |
| |
| /** |
| * Get the maximum value of this object as a Number. |
| * |
| * @return An Integer of 0. |
| */ |
| public Number getMaximumAccessibleValue() { |
| return Integer.valueOf(0); |
| } |
| |
| } // class AccessibleAWTMenuItem |
| |
| } |
