| /* |
| * Copyright (c) 1995, 2011, 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.peer.MenuComponentPeer; |
| import java.awt.event.ActionEvent; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import sun.awt.AppContext; |
| import sun.awt.AWTAccessor; |
| import javax.accessibility.*; |
| |
| import java.security.AccessControlContext; |
| import java.security.AccessController; |
| |
| /** |
| * The abstract class <code>MenuComponent</code> is the superclass |
| * of all menu-related components. In this respect, the class |
| * <code>MenuComponent</code> is analogous to the abstract superclass |
| * <code>Component</code> for AWT components. |
| * <p> |
| * Menu components receive and process AWT events, just as components do, |
| * through the method <code>processEvent</code>. |
| * |
| * @author Arthur van Hoff |
| * @since JDK1.0 |
| */ |
| public abstract class MenuComponent implements java.io.Serializable { |
| |
| static { |
| /* ensure that the necessary native libraries are loaded */ |
| Toolkit.loadLibraries(); |
| if (!GraphicsEnvironment.isHeadless()) { |
| initIDs(); |
| } |
| } |
| |
| transient MenuComponentPeer peer; |
| transient MenuContainer parent; |
| |
| /** |
| * The <code>AppContext</code> of the <code>MenuComponent</code>. |
| * This is set in the constructor and never changes. |
| */ |
| transient AppContext appContext; |
| |
| /** |
| * The menu component's font. This value can be |
| * <code>null</code> at which point a default will be used. |
| * This defaults to <code>null</code>. |
| * |
| * @serial |
| * @see #setFont(Font) |
| * @see #getFont() |
| */ |
| Font font; |
| |
| /** |
| * The menu component's name, which defaults to <code>null</code>. |
| * @serial |
| * @see #getName() |
| * @see #setName(String) |
| */ |
| private String name; |
| |
| /** |
| * A variable to indicate whether a name is explicitly set. |
| * If <code>true</code> the name will be set explicitly. |
| * This defaults to <code>false</code>. |
| * @serial |
| * @see #setName(String) |
| */ |
| private boolean nameExplicitlySet = false; |
| |
| /** |
| * Defaults to <code>false</code>. |
| * @serial |
| * @see #dispatchEvent(AWTEvent) |
| */ |
| boolean newEventsOnly = false; |
| |
| /* |
| * The menu's AccessControlContext. |
| */ |
| private transient volatile AccessControlContext acc = |
| AccessController.getContext(); |
| |
| /* |
| * Returns the acc this menu component was constructed with. |
| */ |
| final AccessControlContext getAccessControlContext() { |
| if (acc == null) { |
| throw new SecurityException( |
| "MenuComponent is missing AccessControlContext"); |
| } |
| return acc; |
| } |
| |
| /* |
| * Internal constants for serialization. |
| */ |
| final static String actionListenerK = Component.actionListenerK; |
| final static String itemListenerK = Component.itemListenerK; |
| |
| /* |
| * JDK 1.1 serialVersionUID |
| */ |
| private static final long serialVersionUID = -4536902356223894379L; |
| |
| static { |
| AWTAccessor.setMenuComponentAccessor( |
| new AWTAccessor.MenuComponentAccessor() { |
| public AppContext getAppContext(MenuComponent menuComp) { |
| return menuComp.appContext; |
| } |
| public void setAppContext(MenuComponent menuComp, |
| AppContext appContext) { |
| menuComp.appContext = appContext; |
| } |
| public MenuContainer getParent(MenuComponent menuComp) { |
| return menuComp.parent; |
| } |
| public Font getFont_NoClientCode(MenuComponent menuComp) { |
| return menuComp.getFont_NoClientCode(); |
| } |
| }); |
| } |
| |
| /** |
| * Creates a <code>MenuComponent</code>. |
| * @exception HeadlessException if |
| * <code>GraphicsEnvironment.isHeadless</code> |
| * returns <code>true</code> |
| * @see java.awt.GraphicsEnvironment#isHeadless |
| */ |
| public MenuComponent() throws HeadlessException { |
| GraphicsEnvironment.checkHeadless(); |
| appContext = AppContext.getAppContext(); |
| } |
| |
| /** |
| * Constructs a name for this <code>MenuComponent</code>. |
| * Called by <code>getName</code> when the name is <code>null</code>. |
| * @return a name for this <code>MenuComponent</code> |
| */ |
| String constructComponentName() { |
| return null; // For strict compliance with prior platform versions, a MenuComponent |
| // that doesn't set its name should return null from |
| // getName() |
| } |
| |
| /** |
| * Gets the name of the menu component. |
| * @return the name of the menu component |
| * @see java.awt.MenuComponent#setName(java.lang.String) |
| * @since JDK1.1 |
| */ |
| public String getName() { |
| if (name == null && !nameExplicitlySet) { |
| synchronized(this) { |
| if (name == null && !nameExplicitlySet) |
| name = constructComponentName(); |
| } |
| } |
| return name; |
| } |
| |
| /** |
| * Sets the name of the component to the specified string. |
| * @param name the name of the menu component |
| * @see java.awt.MenuComponent#getName |
| * @since JDK1.1 |
| */ |
| public void setName(String name) { |
| synchronized(this) { |
| this.name = name; |
| nameExplicitlySet = true; |
| } |
| } |
| |
| /** |
| * Returns the parent container for this menu component. |
| * @return the menu component containing this menu component, |
| * or <code>null</code> if this menu component |
| * is the outermost component, the menu bar itself |
| */ |
| public MenuContainer getParent() { |
| return getParent_NoClientCode(); |
| } |
| // NOTE: This method may be called by privileged threads. |
| // This functionality is implemented in a package-private method |
| // to insure that it cannot be overridden by client subclasses. |
| // DO NOT INVOKE CLIENT CODE ON THIS THREAD! |
| final MenuContainer getParent_NoClientCode() { |
| return parent; |
| } |
| |
| /** |
| * @deprecated As of JDK version 1.1, |
| * programs should not directly manipulate peers. |
| */ |
| @Deprecated |
| public MenuComponentPeer getPeer() { |
| return peer; |
| } |
| |
| /** |
| * Gets the font used for this menu component. |
| * @return the font used in this menu component, if there is one; |
| * <code>null</code> otherwise |
| * @see java.awt.MenuComponent#setFont |
| */ |
| public Font getFont() { |
| Font font = this.font; |
| if (font != null) { |
| return font; |
| } |
| MenuContainer parent = this.parent; |
| if (parent != null) { |
| return parent.getFont(); |
| } |
| return null; |
| } |
| |
| // NOTE: This method may be called by privileged threads. |
| // This functionality is implemented in a package-private method |
| // to insure that it cannot be overridden by client subclasses. |
| // DO NOT INVOKE CLIENT CODE ON THIS THREAD! |
| final Font getFont_NoClientCode() { |
| Font font = this.font; |
| if (font != null) { |
| return font; |
| } |
| |
| // The MenuContainer interface does not have getFont_NoClientCode() |
| // and it cannot, because it must be package-private. Because of |
| // this, we must manually cast classes that implement |
| // MenuContainer. |
| Object parent = this.parent; |
| if (parent != null) { |
| if (parent instanceof Component) { |
| font = ((Component)parent).getFont_NoClientCode(); |
| } else if (parent instanceof MenuComponent) { |
| font = ((MenuComponent)parent).getFont_NoClientCode(); |
| } |
| } |
| return font; |
| } // getFont_NoClientCode() |
| |
| |
| /** |
| * Sets the font to be used for this menu component to the specified |
| * font. This font is also used by all subcomponents of this menu |
| * component, unless those subcomponents specify a different font. |
| * <p> |
| * Some platforms may not support setting of all font attributes |
| * of a menu component; in such cases, calling <code>setFont</code> |
| * will have no effect on the unsupported font attributes of this |
| * menu component. Unless subcomponents of this menu component |
| * specify a different font, this font will be used by those |
| * subcomponents if supported by the underlying platform. |
| * |
| * @param f the font to be set |
| * @see #getFont |
| * @see Font#getAttributes |
| * @see java.awt.font.TextAttribute |
| */ |
| public void setFont(Font f) { |
| font = f; |
| //Fixed 6312943: NullPointerException in method MenuComponent.setFont(Font) |
| MenuComponentPeer peer = (MenuComponentPeer)this.peer; |
| if (peer != null) { |
| peer.setFont(f); |
| } |
| } |
| |
| /** |
| * Removes the menu component's peer. The peer allows us to modify the |
| * appearance of the menu component without changing the functionality of |
| * the menu component. |
| */ |
| public void removeNotify() { |
| synchronized (getTreeLock()) { |
| MenuComponentPeer p = (MenuComponentPeer)this.peer; |
| if (p != null) { |
| Toolkit.getEventQueue().removeSourceEvents(this, true); |
| this.peer = null; |
| p.dispose(); |
| } |
| } |
| } |
| |
| /** |
| * Posts the specified event to the menu. |
| * This method is part of the Java 1.0 event system |
| * and it is maintained only for backwards compatibility. |
| * Its use is discouraged, and it may not be supported |
| * in the future. |
| * @param evt the event which is to take place |
| * @deprecated As of JDK version 1.1, replaced by {@link |
| * #dispatchEvent(AWTEvent) dispatchEvent}. |
| */ |
| @Deprecated |
| public boolean postEvent(Event evt) { |
| MenuContainer parent = this.parent; |
| if (parent != null) { |
| parent.postEvent(evt); |
| } |
| return false; |
| } |
| |
| /** |
| * Delivers an event to this component or one of its sub components. |
| * @param e the event |
| */ |
| public final void dispatchEvent(AWTEvent e) { |
| dispatchEventImpl(e); |
| } |
| |
| void dispatchEventImpl(AWTEvent e) { |
| EventQueue.setCurrentEventAndMostRecentTime(e); |
| |
| Toolkit.getDefaultToolkit().notifyAWTEventListeners(e); |
| |
| if (newEventsOnly || |
| (parent != null && parent instanceof MenuComponent && |
| ((MenuComponent)parent).newEventsOnly)) { |
| if (eventEnabled(e)) { |
| processEvent(e); |
| } else if (e instanceof ActionEvent && parent != null) { |
| e.setSource(parent); |
| ((MenuComponent)parent).dispatchEvent(e); |
| } |
| |
| } else { // backward compatibility |
| Event olde = e.convertToOld(); |
| if (olde != null) { |
| postEvent(olde); |
| } |
| } |
| } |
| |
| // REMIND: remove when filtering is done at lower level |
| boolean eventEnabled(AWTEvent e) { |
| return false; |
| } |
| /** |
| * Processes events occurring on this menu component. |
| * <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 |
| * @since JDK1.1 |
| */ |
| protected void processEvent(AWTEvent e) { |
| } |
| |
| /** |
| * Returns a string representing the state of this |
| * <code>MenuComponent</code>. 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 menu component |
| */ |
| protected String paramString() { |
| String thisName = getName(); |
| return (thisName != null? thisName : ""); |
| } |
| |
| /** |
| * Returns a representation of this menu component as a string. |
| * @return a string representation of this menu component |
| */ |
| public String toString() { |
| return getClass().getName() + "[" + paramString() + "]"; |
| } |
| |
| /** |
| * Gets this component's locking object (the object that owns the thread |
| * sychronization monitor) for AWT component-tree and layout |
| * operations. |
| * @return this component's locking object |
| */ |
| protected final Object getTreeLock() { |
| return Component.LOCK; |
| } |
| |
| /** |
| * Reads the menu component from an object input stream. |
| * |
| * @param s the <code>ObjectInputStream</code> to read |
| * @exception HeadlessException if |
| * <code>GraphicsEnvironment.isHeadless</code> returns |
| * <code>true</code> |
| * @serial |
| * @see java.awt.GraphicsEnvironment#isHeadless |
| */ |
| private void readObject(ObjectInputStream s) |
| throws ClassNotFoundException, IOException, HeadlessException |
| { |
| GraphicsEnvironment.checkHeadless(); |
| |
| acc = AccessController.getContext(); |
| |
| s.defaultReadObject(); |
| |
| appContext = AppContext.getAppContext(); |
| } |
| |
| /** |
| * Initialize JNI field and method IDs. |
| */ |
| private static native void initIDs(); |
| |
| |
| /* |
| * --- Accessibility Support --- |
| * |
| * MenuComponent will contain all of the methods in interface Accessible, |
| * though it won't actually implement the interface - that will be up |
| * to the individual objects which extend MenuComponent. |
| */ |
| |
| AccessibleContext accessibleContext = null; |
| |
| /** |
| * Gets the <code>AccessibleContext</code> associated with |
| * this <code>MenuComponent</code>. |
| * |
| * The method implemented by this base class returns <code>null</code>. |
| * Classes that extend <code>MenuComponent</code> |
| * should implement this method to return the |
| * <code>AccessibleContext</code> associated with the subclass. |
| * |
| * @return the <code>AccessibleContext</code> of this |
| * <code>MenuComponent</code> |
| * @since 1.3 |
| */ |
| public AccessibleContext getAccessibleContext() { |
| return accessibleContext; |
| } |
| |
| /** |
| * Inner class of <code>MenuComponent</code> 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> |
| * The class used to obtain the accessible role for this object. |
| * @since 1.3 |
| */ |
| protected abstract class AccessibleAWTMenuComponent |
| extends AccessibleContext |
| implements java.io.Serializable, AccessibleComponent, |
| AccessibleSelection |
| { |
| /* |
| * JDK 1.3 serialVersionUID |
| */ |
| private static final long serialVersionUID = -4269533416223798698L; |
| |
| /** |
| * Although the class is abstract, this should be called by |
| * all sub-classes. |
| */ |
| protected AccessibleAWTMenuComponent() { |
| } |
| |
| // AccessibleContext methods |
| // |
| |
| /** |
| * Gets the <code>AccessibleSelection</code> associated with this |
| * object which allows its <code>Accessible</code> children to be selected. |
| * |
| * @return <code>AccessibleSelection</code> if supported by object; |
| * else return <code>null</code> |
| * @see AccessibleSelection |
| */ |
| public AccessibleSelection getAccessibleSelection() { |
| return this; |
| } |
| |
| /** |
| * Gets the accessible name of this object. This should almost never |
| * return <code>java.awt.MenuComponent.getName</code>, as that |
| * generally isn't a localized name, and doesn't have meaning for the |
| * user. If the object is fundamentally a text object (e.g. a menu item), the |
| * accessible name should be the text of the object (e.g. "save"). |
| * If the object has a tooltip, the tooltip text may also be an |
| * appropriate String to return. |
| * |
| * @return the localized name of the object -- can be <code>null</code> |
| * if this object does not have a name |
| * @see AccessibleContext#setAccessibleName |
| */ |
| public String getAccessibleName() { |
| return accessibleName; |
| } |
| |
| /** |
| * Gets the accessible description of this object. This should be |
| * a concise, localized description of what this object is - what |
| * is its meaning to the user. If the object has a tooltip, the |
| * tooltip text may be an appropriate string to return, assuming |
| * it contains a concise description of the object (instead of just |
| * the name of the object - e.g. a "Save" icon on a toolbar that |
| * had "save" as the tooltip text shouldn't return the tooltip |
| * text as the description, but something like "Saves the current |
| * text document" instead). |
| * |
| * @return the localized description of the object -- can be |
| * <code>null</code> if this object does not have a description |
| * @see AccessibleContext#setAccessibleDescription |
| */ |
| public String getAccessibleDescription() { |
| return accessibleDescription; |
| } |
| |
| /** |
| * Gets the role of this object. |
| * |
| * @return an instance of <code>AccessibleRole</code> |
| * describing the role of the object |
| * @see AccessibleRole |
| */ |
| public AccessibleRole getAccessibleRole() { |
| return AccessibleRole.AWT_COMPONENT; // Non-specific -- overridden in subclasses |
| } |
| |
| /** |
| * Gets the state of this object. |
| * |
| * @return an instance of <code>AccessibleStateSet</code> |
| * containing the current state set of the object |
| * @see AccessibleState |
| */ |
| public AccessibleStateSet getAccessibleStateSet() { |
| return MenuComponent.this.getAccessibleStateSet(); |
| } |
| |
| /** |
| * Gets the <code>Accessible</code> parent of this object. |
| * If the parent of this object implements <code>Accessible</code>, |
| * this method should simply return <code>getParent</code>. |
| * |
| * @return the <code>Accessible</code> parent of this object -- can |
| * be <code>null</code> if this object does not have an |
| * <code>Accessible</code> parent |
| */ |
| public Accessible getAccessibleParent() { |
| if (accessibleParent != null) { |
| return accessibleParent; |
| } else { |
| MenuContainer parent = MenuComponent.this.getParent(); |
| if (parent instanceof Accessible) { |
| return (Accessible) parent; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Gets the index of this object in its accessible parent. |
| * |
| * @return the index of this object in its parent; -1 if this |
| * object does not have an accessible parent |
| * @see #getAccessibleParent |
| */ |
| public int getAccessibleIndexInParent() { |
| return MenuComponent.this.getAccessibleIndexInParent(); |
| } |
| |
| /** |
| * Returns the number of accessible children in the object. If all |
| * of the children of this object implement <code>Accessible</code>, |
| * then this method should return the number of children of this object. |
| * |
| * @return the number of accessible children in the object |
| */ |
| public int getAccessibleChildrenCount() { |
| return 0; // MenuComponents don't have children |
| } |
| |
| /** |
| * Returns the nth <code>Accessible</code> child of the object. |
| * |
| * @param i zero-based index of child |
| * @return the nth Accessible child of the object |
| */ |
| public Accessible getAccessibleChild(int i) { |
| return null; // MenuComponents don't have children |
| } |
| |
| /** |
| * Returns the locale of this object. |
| * |
| * @return the locale of this object |
| */ |
| public java.util.Locale getLocale() { |
| MenuContainer parent = MenuComponent.this.getParent(); |
| if (parent instanceof Component) |
| return ((Component)parent).getLocale(); |
| else |
| return java.util.Locale.getDefault(); |
| } |
| |
| /** |
| * Gets the <code>AccessibleComponent</code> associated with |
| * this object if one exists. Otherwise return <code>null</code>. |
| * |
| * @return the component |
| */ |
| public AccessibleComponent getAccessibleComponent() { |
| return this; |
| } |
| |
| |
| // AccessibleComponent methods |
| // |
| /** |
| * Gets the background color of this object. |
| * |
| * @return the background color, if supported, of the object; |
| * otherwise, <code>null</code> |
| */ |
| public Color getBackground() { |
| return null; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Sets the background color of this object. |
| * (For transparency, see <code>isOpaque</code>.) |
| * |
| * @param c the new <code>Color</code> for the background |
| * @see Component#isOpaque |
| */ |
| public void setBackground(Color c) { |
| // Not supported for MenuComponents |
| } |
| |
| /** |
| * Gets the foreground color of this object. |
| * |
| * @return the foreground color, if supported, of the object; |
| * otherwise, <code>null</code> |
| */ |
| public Color getForeground() { |
| return null; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Sets the foreground color of this object. |
| * |
| * @param c the new <code>Color</code> for the foreground |
| */ |
| public void setForeground(Color c) { |
| // Not supported for MenuComponents |
| } |
| |
| /** |
| * Gets the <code>Cursor</code> of this object. |
| * |
| * @return the <code>Curso</code>, if supported, of the object; |
| * otherwise, <code>null</code> |
| */ |
| public Cursor getCursor() { |
| return null; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Sets the <code>Cursor</code> of this object. |
| * <p> |
| * The method may have no visual effect if the Java platform |
| * implementation and/or the native system do not support |
| * changing the mouse cursor shape. |
| * @param cursor the new <code>Cursor</code> for the object |
| */ |
| public void setCursor(Cursor cursor) { |
| // Not supported for MenuComponents |
| } |
| |
| /** |
| * Gets the <code>Font</code> of this object. |
| * |
| * @return the <code>Font</code>,if supported, for the object; |
| * otherwise, <code>null</code> |
| */ |
| public Font getFont() { |
| return MenuComponent.this.getFont(); |
| } |
| |
| /** |
| * Sets the <code>Font</code> of this object. |
| * |
| * @param f the new <code>Font</code> for the object |
| */ |
| public void setFont(Font f) { |
| MenuComponent.this.setFont(f); |
| } |
| |
| /** |
| * Gets the <code>FontMetrics</code> of this object. |
| * |
| * @param f the <code>Font</code> |
| * @return the FontMetrics, if supported, the object; |
| * otherwise, <code>null</code> |
| * @see #getFont |
| */ |
| public FontMetrics getFontMetrics(Font f) { |
| return null; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Determines if the object is enabled. |
| * |
| * @return true if object is enabled; otherwise, false |
| */ |
| public boolean isEnabled() { |
| return true; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Sets the enabled state of the object. |
| * |
| * @param b if true, enables this object; otherwise, disables it |
| */ |
| public void setEnabled(boolean b) { |
| // Not supported for MenuComponents |
| } |
| |
| /** |
| * Determines if the object is visible. Note: this means that the |
| * object intends to be visible; however, it may not in fact be |
| * showing on the screen because one of the objects that this object |
| * is contained by is not visible. To determine if an object is |
| * showing on the screen, use <code>isShowing</code>. |
| * |
| * @return true if object is visible; otherwise, false |
| */ |
| public boolean isVisible() { |
| return true; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Sets the visible state of the object. |
| * |
| * @param b if true, shows this object; otherwise, hides it |
| */ |
| public void setVisible(boolean b) { |
| // Not supported for MenuComponents |
| } |
| |
| /** |
| * Determines if the object is showing. This is determined by checking |
| * the visibility of the object and ancestors of the object. Note: |
| * this will return true even if the object is obscured by another |
| * (for example, it happens to be underneath a menu that was pulled |
| * down). |
| * |
| * @return true if object is showing; otherwise, false |
| */ |
| public boolean isShowing() { |
| return true; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Checks whether the specified point is within this object's bounds, |
| * where the point's x and y coordinates are defined to be relative to |
| * the coordinate system of the object. |
| * |
| * @param p the <code>Point</code> relative to the coordinate |
| * system of the object |
| * @return true if object contains <code>Point</code>; otherwise false |
| */ |
| public boolean contains(Point p) { |
| return false; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Returns the location of the object on the screen. |
| * |
| * @return location of object on screen -- can be <code>null</code> |
| * if this object is not on the screen |
| */ |
| public Point getLocationOnScreen() { |
| return null; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Gets the location of the object relative to the parent in the form |
| * of a point specifying the object's top-left corner in the screen's |
| * coordinate space. |
| * |
| * @return an instance of <code>Point</code> representing the |
| * top-left corner of the object's bounds in the coordinate |
| * space of the screen; <code>null</code> if |
| * this object or its parent are not on the screen |
| */ |
| public Point getLocation() { |
| return null; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Sets the location of the object relative to the parent. |
| */ |
| public void setLocation(Point p) { |
| // Not supported for MenuComponents |
| } |
| |
| /** |
| * Gets the bounds of this object in the form of a |
| * <code>Rectangle</code> object. |
| * The bounds specify this object's width, height, and location |
| * relative to its parent. |
| * |
| * @return a rectangle indicating this component's bounds; |
| * <code>null</code> if this object is not on the screen |
| */ |
| public Rectangle getBounds() { |
| return null; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Sets the bounds of this object in the form of a |
| * <code>Rectangle</code> object. |
| * The bounds specify this object's width, height, and location |
| * relative to its parent. |
| * |
| * @param r a rectangle indicating this component's bounds |
| */ |
| public void setBounds(Rectangle r) { |
| // Not supported for MenuComponents |
| } |
| |
| /** |
| * Returns the size of this object in the form of a |
| * <code>Dimension</code> object. The height field of |
| * the <code>Dimension</code> object contains this object's |
| * height, and the width field of the <code>Dimension</code> |
| * object contains this object's width. |
| * |
| * @return a <code>Dimension</code> object that indicates the |
| * size of this component; <code>null</code> |
| * if this object is not on the screen |
| */ |
| public Dimension getSize() { |
| return null; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Resizes this object. |
| * |
| * @param d - the <code>Dimension</code> specifying the |
| * new size of the object |
| */ |
| public void setSize(Dimension d) { |
| // Not supported for MenuComponents |
| } |
| |
| /** |
| * Returns the <code>Accessible</code> child, if one exists, |
| * contained at the local coordinate <code>Point</code>. |
| * If there is no <code>Accessible</code> child, <code>null</code> |
| * is returned. |
| * |
| * @param p the point defining the top-left corner of the |
| * <code>Accessible</code>, given in the coordinate space |
| * of the object's parent |
| * @return the <code>Accessible</code>, if it exists, |
| * at the specified location; else <code>null</code> |
| */ |
| public Accessible getAccessibleAt(Point p) { |
| return null; // MenuComponents don't have children |
| } |
| |
| /** |
| * Returns whether this object can accept focus or not. |
| * |
| * @return true if object can accept focus; otherwise false |
| */ |
| public boolean isFocusTraversable() { |
| return true; // Not supported for MenuComponents |
| } |
| |
| /** |
| * Requests focus for this object. |
| */ |
| public void requestFocus() { |
| // Not supported for MenuComponents |
| } |
| |
| /** |
| * Adds the specified focus listener to receive focus events from this |
| * component. |
| * |
| * @param l the focus listener |
| */ |
| public void addFocusListener(java.awt.event.FocusListener l) { |
| // Not supported for MenuComponents |
| } |
| |
| /** |
| * Removes the specified focus listener so it no longer receives focus |
| * events from this component. |
| * |
| * @param l the focus listener |
| */ |
| public void removeFocusListener(java.awt.event.FocusListener l) { |
| // Not supported for MenuComponents |
| } |
| |
| // AccessibleSelection methods |
| // |
| |
| /** |
| * Returns the number of <code>Accessible</code> children currently selected. |
| * If no children are selected, the return value will be 0. |
| * |
| * @return the number of items currently selected |
| */ |
| public int getAccessibleSelectionCount() { |
| return 0; // To be fully implemented in a future release |
| } |
| |
| /** |
| * Returns an <code>Accessible</code> representing the specified |
| * selected child in the object. If there isn't a selection, or there are |
| * fewer children selected than the integer passed in, the return |
| * value will be <code>null</code>. |
| * <p>Note that the index represents the i-th selected child, which |
| * is different from the i-th child. |
| * |
| * @param i the zero-based index of selected children |
| * @return the i-th selected child |
| * @see #getAccessibleSelectionCount |
| */ |
| public Accessible getAccessibleSelection(int i) { |
| return null; // To be fully implemented in a future release |
| } |
| |
| /** |
| * Determines if the current child of this object is selected. |
| * |
| * @return true if the current child of this object is selected; |
| * else false |
| * @param i the zero-based index of the child in this |
| * <code>Accessible</code> object |
| * @see AccessibleContext#getAccessibleChild |
| */ |
| public boolean isAccessibleChildSelected(int i) { |
| return false; // To be fully implemented in a future release |
| } |
| |
| /** |
| * Adds the specified <code>Accessible</code> child of the object |
| * to the object's selection. If the object supports multiple selections, |
| * the specified child is added to any existing selection, otherwise |
| * it replaces any existing selection in the object. If the |
| * specified child is already selected, this method has no effect. |
| * |
| * @param i the zero-based index of the child |
| * @see AccessibleContext#getAccessibleChild |
| */ |
| public void addAccessibleSelection(int i) { |
| // To be fully implemented in a future release |
| } |
| |
| /** |
| * Removes the specified child of the object from the object's |
| * selection. If the specified item isn't currently selected, this |
| * method has no effect. |
| * |
| * @param i the zero-based index of the child |
| * @see AccessibleContext#getAccessibleChild |
| */ |
| public void removeAccessibleSelection(int i) { |
| // To be fully implemented in a future release |
| } |
| |
| /** |
| * Clears the selection in the object, so that no children in the |
| * object are selected. |
| */ |
| public void clearAccessibleSelection() { |
| // To be fully implemented in a future release |
| } |
| |
| /** |
| * Causes every child of the object to be selected |
| * if the object supports multiple selections. |
| */ |
| public void selectAllAccessibleSelection() { |
| // To be fully implemented in a future release |
| } |
| |
| } // inner class AccessibleAWTComponent |
| |
| /** |
| * Gets the index of this object in its accessible parent. |
| * |
| * @return -1 if this object does not have an accessible parent; |
| * otherwise, the index of the child in its accessible parent. |
| */ |
| int getAccessibleIndexInParent() { |
| MenuContainer localParent = parent; |
| if (!(localParent instanceof MenuComponent)) { |
| // MenuComponents only have accessible index when inside MenuComponents |
| return -1; |
| } |
| MenuComponent localParentMenu = (MenuComponent)localParent; |
| return localParentMenu.getAccessibleChildIndex(this); |
| } |
| |
| /** |
| * Gets the index of the child within this MenuComponent. |
| * |
| * @param child MenuComponent whose index we are interested in. |
| * @return -1 if this object doesn't contain the child, |
| * otherwise, index of the child. |
| */ |
| int getAccessibleChildIndex(MenuComponent child) { |
| return -1; // Overridden in subclasses. |
| } |
| |
| /** |
| * Gets the state of this object. |
| * |
| * @return an instance of <code>AccessibleStateSet</code> |
| * containing the current state set of the object |
| * @see AccessibleState |
| */ |
| AccessibleStateSet getAccessibleStateSet() { |
| AccessibleStateSet states = new AccessibleStateSet(); |
| return states; |
| } |
| |
| } |
