Quelle Window.java

Sprache: JAVA

/*
* Copyright (c) 1995, 2021, 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
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*/

package java.awt;

import java.awt.event.ComponentEvent;
import java.awt.event.FocusEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseWheelEvent;
import java.awt.event.WindowEvent;
import java.awt.event.WindowFocusListener;
import java.awt.event.WindowListener;
import java.awt.event.WindowStateListener;
import java.awt.geom.Path2D;
import java.awt.geom.Point2D;
import java.awt.im.InputContext;
import java.awt.image.BufferStrategy;
import java.awt.peer.ComponentPeer;
import java.awt.peer.WindowPeer;
import java.beans.PropertyChangeListener;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OptionalDataException;
import java.io.Serial;
import java.io.Serializable;
import java.lang.ref.WeakReference;
import java.lang.reflect.InvocationTargetException;
import java.security.AccessController;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EventListener;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.Set;
import java.util.Vector;
import java.util.concurrent.atomic.AtomicBoolean;

import javax.accessibility.Accessible;
import javax.accessibility.AccessibleContext;
import javax.accessibility.AccessibleRole;
import javax.accessibility.AccessibleState;
import javax.accessibility.AccessibleStateSet;

import sun.awt.AWTAccessor;
import sun.awt.AWTPermissions;
import sun.awt.AppContext;
import sun.awt.DebugSettings;
import sun.awt.SunToolkit;
import sun.awt.util.IdentityArrayList;
import sun.java2d.pipe.Region;
import sun.security.action.GetPropertyAction;
import sun.util.logging.PlatformLogger;

/**
* A {@code Window} object is a top-level window with no borders and no
* menubar.
* The default layout for a window is {@code BorderLayout}.
* 
* A window must have either a frame, dialog, or another window defined as its
* owner when it's constructed.
* 
* In a multi-screen environment, you can create a {@code Window}
* on a different screen device by constructing the {@code Window}
* with {@link #Window(Window, GraphicsConfiguration)}. The
* {@code GraphicsConfiguration} object is one of the
* {@code GraphicsConfiguration} objects of the target screen device.
* 
* In a virtual device multi-screen environment in which the desktop
* area could span multiple physical screen devices, the bounds of all
* configurations are relative to the virtual device coordinate system.
* The origin of the virtual-coordinate system is at the upper left-hand
* corner of the primary physical screen. Depending on the location of
* the primary screen in the virtual device, negative coordinates are
* possible, as shown in the following figure.
* 
* <img src="doc-files/MultiScreen.gif"
* alt="Diagram shows virtual device containing 4 physical screens. Primary
* physical screen shows coords (0,0), other screen shows (-80,-100)."
* style="margin: 7px 10px;">
* 
* In such an environment, when calling {@code setLocation},
* you must pass a virtual coordinate to this method. Similarly,
* calling {@code getLocationOnScreen} on a {@code Window} returns
* virtual device coordinates. Call the {@code getBounds} method
* of a {@code GraphicsConfiguration} to find its origin in the virtual
* coordinate system.
* 
* The following code sets the location of a {@code Window}
* at (10, 10) relative to the origin of the physical screen
* of the corresponding {@code GraphicsConfiguration}. If the
* bounds of the {@code GraphicsConfiguration} is not taken
* into account, the {@code Window} location would be set
* at (10, 10) relative to the virtual-coordinate system and would appear
* on the primary physical screen, which might be different from the
* physical screen of the specified {@code GraphicsConfiguration}.
*
* <pre>
* Window w = new Window(Window owner, GraphicsConfiguration gc);
* Rectangle bounds = gc.getBounds();
* w.setLocation(10 + bounds.x, 10 + bounds.y);
* </pre>
*
* 
* Note: the location and size of top-level windows (including
* {@code Window}s, {@code Frame}s, and {@code Dialog}s)
* are under the control of the desktop's window management system.
* Calls to {@code setLocation}, {@code setSize}, and
* {@code setBounds} are requests (not directives) which are
* forwarded to the window management system. Every effort will be
* made to honor such requests. However, in some cases the window
* management system may ignore such requests, or modify the requested
* geometry in order to place and size the {@code Window} in a way
* that more closely matches the desktop settings.
* 
* Visual effects such as halos, shadows, motion effects and animations may be
* applied to the window by the desktop window management system. These are
* outside the knowledge and control of the AWT and so for the purposes of this
* specification are not considered part of the top-level window.
* 
* Due to the asynchronous nature of native event handling, the results
* returned by {@code getBounds}, {@code getLocation},
* {@code getLocationOnScreen}, and {@code getSize} might not
* reflect the actual geometry of the Window on screen until the last
* request has been processed. During the processing of subsequent
* requests these values might change accordingly while the window
* management system fulfills the requests.
* 
* An application may set the size and location of an invisible
* {@code Window} arbitrarily, but the window management system may
* subsequently change its size and/or location when the
* {@code Window} is made visible. One or more {@code ComponentEvent}s
* will be generated to indicate the new geometry.
* 
* Windows are capable of generating the following WindowEvents:
* WindowOpened, WindowClosed, WindowGainedFocus, WindowLostFocus.
*
* @author Sami Shaio
* @author Arthur van Hoff
* @see WindowEvent
* @see #addWindowListener
* @see java.awt.BorderLayout
* @since 1.0
*/
public class Window extends Container implements Accessible {

 /**
 * Enumeration of available window types.
 *
 * A window type defines the generic visual appearance and behavior of a
 * top-level window. For example, the type may affect the kind of
 * decorations of a decorated {@code Frame} or {@code Dialog} instance.
 * 
 * Some platforms may not fully support a certain window type. Depending on
 * the level of support, some properties of the window type may be
 * disobeyed.
 *
 * @see #getType
 * @see #setType
 * @since 1.7
 */
 public static enum Type {
 /**
 * Represents a normal window.
 *
 * This is the default type for objects of the {@code Window} class or
 * its descendants. Use this type for regular top-level windows.
 */
 NORMAL,

 /**
 * Represents a utility window.
 *
 * A utility window is usually a small window such as a toolbar or a
 * palette. The native system may render the window with smaller
 * title-bar if the window is either a {@code Frame} or a {@code
 * Dialog} object, and if it has its decorations enabled.
 */
 UTILITY,

 /**
 * Represents a popup window.
 *
 * A popup window is a temporary window such as a drop-down menu or a
 * tooltip. On some platforms, windows of that type may be forcibly
 * made undecorated even if they are instances of the {@code Frame} or
 * {@code Dialog} class, and have decorations enabled.
 */
 POPUP
 }

 /**
 * This represents the warning message that is
 * to be displayed in a non secure window. ie :
 * a window that has a security manager installed that denies
 * {@code AWTPermission("showWindowWithoutWarningBanner")}.
 * This message can be displayed anywhere in the window.
 *
 * @serial
 * @see #getWarningString
 */
 String warningString;

 /**
 * {@code icons} is the graphical way we can
 * represent the frames and dialogs.
 * {@code Window} can't display icon but it's
 * being inherited by owned {@code Dialog}s.
 *
 * @serial
 * @see #getIconImages
 * @see #setIconImages
 */
 transient java.util.List<Image> icons;

 /**
 * Holds the reference to the component which last had focus in this window
 * before it lost focus.
 */
 private transient Component temporaryLostComponent;

 static boolean systemSyncLWRequests = false;

 /**
 * Focus transfers should be synchronous for lightweight component requests.
 */
 boolean syncLWRequests = false;
 transient boolean beforeFirstShow = true;
 private transient boolean disposing = false;
 transient WindowDisposerRecord disposerRecord = null;

 static final int OPENED = 0x01;

 /**
 * An Integer value representing the Window State.
 *
 * @serial
 * @since 1.2
 * @see #show
 */
 int state;

 /**
 * A boolean value representing Window always-on-top state
 * @since 1.5
 * @serial
 * @see #setAlwaysOnTop
 * @see #isAlwaysOnTop
 */
 private boolean alwaysOnTop;

 /**
 * Contains all the windows that have a peer object associated,
 * i. e. between addNotify() and removeNotify() calls. The list
 * of all Window instances can be obtained from AppContext object.
 *
 * @since 1.6
 */
 private static final IdentityArrayList<Window> allWindows = new IdentityArrayList<Window>();

 /**
 * A vector containing all the windows this
 * window currently owns.
 * @since 1.2
 * @see #getOwnedWindows
 */
 transient Vector<WeakReference<Window>> ownedWindowList =
 new Vector<WeakReference<Window>>();

 /*
 * We insert a weak reference into the Vector of all Windows in AppContext
 * instead of 'this' so that garbage collection can still take place
 * correctly.
 */
 private transient WeakReference<Window> weakThis;

 transient boolean showWithParent;

 /**
 * Contains the modal dialog that blocks this window, or null
 * if the window is unblocked.
 *
 * @since 1.6
 */
 transient Dialog modalBlocker;

 /**
 * @serial
 *
 * @see java.awt.Dialog.ModalExclusionType
 * @see #getModalExclusionType
 * @see #setModalExclusionType
 *
 * @since 1.6
 */
 Dialog.ModalExclusionType modalExclusionType;

 transient WindowListener windowListener;
 transient WindowStateListener windowStateListener;
 transient WindowFocusListener windowFocusListener;

 transient InputContext inputContext;
 private transient Object inputContextLock = new Object();

 /**
 * Unused. Maintained for serialization backward-compatibility.
 *
 * @serial
 * @since 1.2
 */
 private FocusManager focusMgr;

 /**
 * Indicates whether this Window can become the focused Window.
 *
 * @serial
 * @see #getFocusableWindowState
 * @see #setFocusableWindowState
 * @since 1.4
 */
 private boolean focusableWindowState = true;

 /**
 * Indicates whether this window should receive focus on
 * subsequently being shown (with a call to {@code setVisible(true)}), or
 * being moved to the front (with a call to {@code toFront()}).
 *
 * @serial
 * @see #setAutoRequestFocus
 * @see #isAutoRequestFocus
 * @since 1.7
 */
 private volatile boolean autoRequestFocus = true;

 /*
 * Indicates that this window is being shown. This flag is set to true at
 * the beginning of show() and to false at the end of show().
 *
 * @see #show()
 * @see Dialog#shouldBlock
 */
 transient boolean isInShow = false;

 /**
 * The opacity level of the window
 *
 * @serial
 * @see #setOpacity(float)
 * @see #getOpacity()
 * @since 1.7
 */
 private volatile float opacity = 1.0f;

 /**
 * The shape assigned to this window. This field is set to {@code null} if
 * no shape is set (rectangular window).
 *
 * @serial
 * @see #getShape()
 * @see #setShape(Shape)
 * @since 1.7
 */
 @SuppressWarnings("serial") // Not statically typed as Serializable
 private Shape shape = null;

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

 /**
 * Use serialVersionUID from JDK 1.1 for interoperability.
 */
 @Serial
 private static final long serialVersionUID = 4497834738069338734L;

 private static final PlatformLogger log = PlatformLogger.getLogger("java.awt.Window");

 private static final boolean locationByPlatformProp;

 transient boolean isTrayIconWindow = false;

 /**
 * These fields are initialized in the native peer code
 * or via AWTAccessor's WindowAccessor.
 */
 private transient volatile int securityWarningWidth;
 private transient volatile int securityWarningHeight;

 static {
 /* ensure that the necessary native libraries are loaded */
 Toolkit.loadLibraries();
 if (!GraphicsEnvironment.isHeadless()) {
 initIDs();
 }

 @SuppressWarnings("removal")
 String s = java.security.AccessController.doPrivileged(
 new GetPropertyAction("java.awt.syncLWRequests"));
 systemSyncLWRequests = "true".equals(s);
 @SuppressWarnings("removal")
 String s2 = java.security.AccessController.doPrivileged(
 new GetPropertyAction("java.awt.Window.locationByPlatform"));
 locationByPlatformProp = "true".equals(s2);
 }

 /**
 * Initialize JNI field and method IDs for fields that may be
 accessed from C.
 */
 private static native void initIDs();

 /**
 * Constructs a new, initially invisible window in default size with the
 * specified {@code GraphicsConfiguration}.
 * 
 * If there is a security manager, then it is invoked to check
 * {@code AWTPermission("showWindowWithoutWarningBanner")}
 * to determine whether or not the window must be displayed with
 * a warning banner.
 *
 * @param gc the {@code GraphicsConfiguration} of the target screen
 * device. If {@code gc} is {@code null}, the system default
 * {@code GraphicsConfiguration} is assumed
 * @throws IllegalArgumentException if {@code gc}
 * is not from a screen device
 * @throws HeadlessException when
 * {@code GraphicsEnvironment.isHeadless()} returns {@code true}
 *
 * @see java.awt.GraphicsEnvironment#isHeadless
 */
 Window(GraphicsConfiguration gc) {
 init(gc);
 }

 transient Object anchor = new Object();
 static class WindowDisposerRecord implements sun.java2d.DisposerRecord {
 WeakReference<Window> owner;
 final WeakReference<Window> weakThis;
 final WeakReference<AppContext> context;

 WindowDisposerRecord(AppContext context, Window victim) {
 weakThis = victim.weakThis;
 this.context = new WeakReference<AppContext>(context);
 }

 public void updateOwner() {
 Window victim = weakThis.get();
 owner = (victim == null)
 ? null
 : new WeakReference<Window>(victim.getOwner());
 }

 public void dispose() {
 if (owner != null) {
 Window parent = owner.get();
 if (parent != null) {
 parent.removeOwnedWindow(weakThis);
 }
 }
 AppContext ac = context.get();
 if (null != ac) {
 Window.removeFromWindowList(ac, weakThis);
 }
 }
 }

 private GraphicsConfiguration initGC(GraphicsConfiguration gc) {
 GraphicsEnvironment.checkHeadless();

 if (gc == null) {
 gc = GraphicsEnvironment.getLocalGraphicsEnvironment().
 getDefaultScreenDevice().getDefaultConfiguration();
 }
 setGraphicsConfiguration(gc);

 return gc;
 }

 private void init(GraphicsConfiguration gc) {
 GraphicsEnvironment.checkHeadless();

 syncLWRequests = systemSyncLWRequests;

 weakThis = new WeakReference<Window>(this);
 addToWindowList();

 setWarningString();
 this.cursor = Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
 this.visible = false;

 gc = initGC(gc);

 if (gc.getDevice().getType() !=
 GraphicsDevice.TYPE_RASTER_SCREEN) {
 throw new IllegalArgumentException("not a screen device");
 }
 setLayout(new BorderLayout());

 /* offset the initial location with the original of the screen */
 /* and any insets */
 Rectangle screenBounds = gc.getBounds();
 Insets screenInsets = getToolkit().getScreenInsets(gc);
 int x = getX() + screenBounds.x + screenInsets.left;
 int y = getY() + screenBounds.y + screenInsets.top;
 if (x != this.x || y != this.y) {
 setLocation(x, y);
 /* reset after setLocation */
 setLocationByPlatform(locationByPlatformProp);
 }

 modalExclusionType = Dialog.ModalExclusionType.NO_EXCLUDE;
 disposerRecord = new WindowDisposerRecord(appContext, this);
 sun.java2d.Disposer.addRecord(anchor, disposerRecord);

 SunToolkit.checkAndSetPolicy(this);
 }

 /**
 * Constructs a new, initially invisible window in the default size.
 * 
 * If there is a security manager set, it is invoked to check
 * {@code AWTPermission("showWindowWithoutWarningBanner")}.
 * If that check fails with a {@code SecurityException} then a warning
 * banner is created.
 *
 * @throws HeadlessException when
 * {@code GraphicsEnvironment.isHeadless()} returns {@code true}
 *
 * @see java.awt.GraphicsEnvironment#isHeadless
 */
 Window() throws HeadlessException {
 GraphicsEnvironment.checkHeadless();
 init((GraphicsConfiguration)null);
 }

 /**
 * Constructs a new, initially invisible window with the specified
 * {@code Frame} as its owner. The window will not be focusable
 * unless its owner is showing on the screen.
 * 
 * If there is a security manager set, it is invoked to check
 * {@code AWTPermission("showWindowWithoutWarningBanner")}.
 * If that check fails with a {@code SecurityException} then a warning
 * banner is created.
 *
 * @param owner the {@code Frame} to act as owner or {@code null}
 * if this window has no owner
 * @throws IllegalArgumentException if the {@code owner}'s
 * {@code GraphicsConfiguration} is not from a screen device
 * @throws HeadlessException when
 * {@code GraphicsEnvironment.isHeadless} returns {@code true}
 *
 * @see java.awt.GraphicsEnvironment#isHeadless
 * @see #isShowing
 */
 public Window(Frame owner) {
 this(owner == null ? (GraphicsConfiguration)null :
 owner.getGraphicsConfiguration());
 ownedInit(owner);
 }

 /**
 * Constructs a new, initially invisible window with the specified
 * {@code Window} as its owner. This window will not be focusable
 * unless its nearest owning {@code Frame} or {@code Dialog}
 * is showing on the screen.
 * 
 * If there is a security manager set, it is invoked to check
 * {@code AWTPermission("showWindowWithoutWarningBanner")}.
 * If that check fails with a {@code SecurityException} then a
 * warning banner is created.
 *
 * @param owner the {@code Window} to act as owner or
 * {@code null} if this window has no owner
 * @throws IllegalArgumentException if the {@code owner}'s
 * {@code GraphicsConfiguration} is not from a screen device
 * @throws HeadlessException when
 * {@code GraphicsEnvironment.isHeadless()} returns
 * {@code true}
 *
 * @see java.awt.GraphicsEnvironment#isHeadless
 * @see #isShowing
 *
 * @since 1.2
 */
 public Window(Window owner) {
 this(owner == null ? (GraphicsConfiguration)null :
 owner.getGraphicsConfiguration());
 ownedInit(owner);
 }

 /**
 * Constructs a new, initially invisible window with the specified owner
 * {@code Window} and a {@code GraphicsConfiguration}
 * of a screen device. The Window will not be focusable unless
 * its nearest owning {@code Frame} or {@code Dialog}
 * is showing on the screen.
 * 
 * If there is a security manager set, it is invoked to check
 * {@code AWTPermission("showWindowWithoutWarningBanner")}. If that
 * check fails with a {@code SecurityException} then a warning banner
 * is created.
 *
 * @param owner the window to act as owner or {@code null}
 * if this window has no owner
 * @param gc the {@code GraphicsConfiguration} of the target
 * screen device; if {@code gc} is {@code null},
 * the system default {@code GraphicsConfiguration} is assumed
 * @throws IllegalArgumentException if {@code gc}
 * is not from a screen device
 * @throws HeadlessException when
 * {@code GraphicsEnvironment.isHeadless()} returns
 * {@code true}
 *
 * @see java.awt.GraphicsEnvironment#isHeadless
 * @see GraphicsConfiguration#getBounds
 * @see #isShowing
 * @since 1.3
 */
 public Window(Window owner, GraphicsConfiguration gc) {
 this(gc);
 ownedInit(owner);
 }

 private void ownedInit(Window owner) {
 this.parent = owner;
 if (owner != null) {
 owner.addOwnedWindow(weakThis);
 if (owner.isAlwaysOnTop()) {
 try {
 setAlwaysOnTop(true);
 } catch (SecurityException ignore) {
 }
 }
 }

 // WindowDisposerRecord requires a proper value of parent field.
 disposerRecord.updateOwner();
 }

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

 /**
 * Returns the sequence of images to be displayed as the icon for this window.
 * 
 * This method returns a copy of the internally stored list, so all operations
 * on the returned object will not affect the window's behavior.
 *
 * @return the copy of icon images' list for this window, or
 * empty list if this window doesn't have icon images.
 * @see #setIconImages
 * @see #setIconImage(Image)
 * @since 1.6
 */
 public java.util.List<Image> getIconImages() {
 java.util.List<Image> icons = this.icons;
 if (icons == null || icons.size() == 0) {
 return new ArrayList<Image>();
 }
 return new ArrayList<Image>(icons);
 }

 /**
 * Sets the sequence of images to be displayed as the icon
 * for this window. Subsequent calls to {@code getIconImages} will
 * always return a copy of the {@code icons} list.
 * 
 * Depending on the platform capabilities one or several images
 * of different dimensions will be used as the window's icon.
 * 
 * The {@code icons} list can contain {@code MultiResolutionImage} images also.
 * Suitable image depending on screen resolution is extracted from
 * base {@code MultiResolutionImage} image and added to the icons list
 * while base resolution image is removed from list.
 * The {@code icons} list is scanned for the images of most
 * appropriate dimensions from the beginning. If the list contains
 * several images of the same size, the first will be used.
 * 
 * Ownerless windows with no icon specified use platform-default icon.
 * The icon of an owned window may be inherited from the owner
 * unless explicitly overridden.
 * Setting the icon to {@code null} or empty list restores
 * the default behavior.
 * 
 * Note : Native windowing systems may use different images of differing
 * dimensions to represent a window, depending on the context (e.g.
 * window decoration, window list, taskbar, etc.). They could also use
 * just a single image for all contexts or no image at all.
 *
 * @param icons the list of icon images to be displayed.
 * @see #getIconImages()
 * @see #setIconImage(Image)
 * @since 1.6
 */
 public synchronized void setIconImages(java.util.List<? extends Image> icons) {
 this.icons = (icons == null) ? new ArrayList<Image>() :
 new ArrayList<Image>(icons);
 WindowPeer peer = (WindowPeer)this.peer;
 if (peer != null) {
 peer.updateIconImages();
 }
 // Always send a property change event
 firePropertyChange("iconImage", null, null);
 }

 /**
 * Sets the image to be displayed as the icon for this window.
 * 
 * This method can be used instead of {@link #setIconImages setIconImages()}
 * to specify a single image as a window's icon.
 * 
 * The following statement:
 * <pre>
 * setIconImage(image);
 * </pre>
 * is equivalent to:
 * <pre>
 * ArrayList<Image> imageList = new ArrayList<Image>();
 * imageList.add(image);
 * setIconImages(imageList);
 * </pre>
 * 
 * Note : Native windowing systems may use different images of differing
 * dimensions to represent a window, depending on the context (e.g.
 * window decoration, window list, taskbar, etc.). They could also use
 * just a single image for all contexts or no image at all.
 *
 * @param image the icon image to be displayed.
 * @see #setIconImages
 * @see #getIconImages()
 * @since 1.6
 */
 public void setIconImage(Image image) {
 ArrayList<Image> imageList = new ArrayList<Image>();
 if (image != null) {
 imageList.add(image);
 }
 setIconImages(imageList);
 }

 /**
 * Makes this Window displayable by creating the connection to its
 * native screen resource.
 * This method is called internally by the toolkit and should
 * not be called directly by programs.
 * @see Component#isDisplayable
 * @see Container#removeNotify
 * @since 1.0
 */
 public void addNotify() {
 synchronized (getTreeLock()) {
 Container parent = this.parent;
 if (parent != null && parent.peer == null) {
 parent.addNotify();
 }
 if (peer == null) {
 peer = getComponentFactory().createWindow(this);
 }
 synchronized (allWindows) {
 allWindows.add(this);
 }
 super.addNotify();
 }
 }

 /**
 * {@inheritDoc}
 */
 public void removeNotify() {
 synchronized (getTreeLock()) {
 synchronized (allWindows) {
 allWindows.remove(this);
 }
 super.removeNotify();
 }
 }

 /**
 * Causes this Window to be sized to fit the preferred size
 * and layouts of its subcomponents. The resulting width and
 * height of the window are automatically enlarged if either
 * of dimensions is less than the minimum size as specified
 * by the previous call to the {@code setMinimumSize} method.
 * 
 * If the window and/or its owner are not displayable yet,
 * both of them are made displayable before calculating
 * the preferred size. The Window is validated after its
 * size is being calculated.
 *
 * @see Component#isDisplayable
 * @see #setMinimumSize
 */
 @SuppressWarnings("deprecation")
 public void pack() {
 Container parent = this.parent;
 if (parent != null && parent.peer == null) {
 parent.addNotify();
 }
 if (peer == null) {
 addNotify();
 }
 Dimension newSize = getPreferredSize();
 if (peer != null) {
 setClientSize(newSize.width, newSize.height);
 }

 if(beforeFirstShow) {
 isPacked = true;
 }

 validateUnconditionally();
 }

 /**
 * Sets the minimum size of this window to a constant
 * value. Subsequent calls to {@code getMinimumSize}
 * will always return this value. If current window's
 * size is less than {@code minimumSize} the size of the
 * window is automatically enlarged to honor the minimum size.
 * 
 * If the {@code setSize} or {@code setBounds} methods
 * are called afterwards with a width or height less than
 * that was specified by the {@code setMinimumSize} method
 * the window is automatically enlarged to meet
 * the {@code minimumSize} value. The {@code minimumSize}
 * value also affects the behaviour of the {@code pack} method.
 * 
 * The default behavior is restored by setting the minimum size
 * parameter to the {@code null} value.
 * 
 * Resizing operation may be restricted if the user tries
 * to resize window below the {@code minimumSize} value.
 * This behaviour is platform-dependent.
 *
 * @param minimumSize the new minimum size of this window
 * @see Component#setMinimumSize
 * @see #getMinimumSize
 * @see #isMinimumSizeSet
 * @see #setSize(Dimension)
 * @see #pack
 * @since 1.6
 */
 public void setMinimumSize(Dimension minimumSize) {
 synchronized (getTreeLock()) {
 super.setMinimumSize(minimumSize);
 Dimension size = getSize();
 if (isMinimumSizeSet()) {
 if (size.width < minimumSize.width || size.height < minimumSize.height) {
 int nw = Math.max(width, minimumSize.width);
 int nh = Math.max(height, minimumSize.height);
 setSize(nw, nh);
 }
 }
 if (peer != null) {
 ((WindowPeer)peer).updateMinimumSize();
 }
 }
 }

 /**
 * {@inheritDoc}
 * 
 * The {@code d.width} and {@code d.height} values
 * are automatically enlarged if either is less than
 * the minimum size as specified by previous call to
 * {@code setMinimumSize}.
 * 
 * The method changes the geometry-related data. Therefore,
 * the native windowing system may ignore such requests, or it may modify
 * the requested data, so that the {@code Window} object is placed and sized
 * in a way that corresponds closely to the desktop settings.
 *
 * @see #getSize
 * @see #setBounds
 * @see #setMinimumSize
 * @since 1.6
 */
 public void setSize(Dimension d) {
 super.setSize(d);
 }

 /**
 * {@inheritDoc}
 * 
 * The {@code width} and {@code height} values
 * are automatically enlarged if either is less than
 * the minimum size as specified by previous call to
 * {@code setMinimumSize}.
 * 
 * The method changes the geometry-related data. Therefore,
 * the native windowing system may ignore such requests, or it may modify
 * the requested data, so that the {@code Window} object is placed and sized
 * in a way that corresponds closely to the desktop settings.
 *
 * @see #getSize
 * @see #setBounds
 * @see #setMinimumSize
 * @since 1.6
 */
 public void setSize(int width, int height) {
 super.setSize(width, height);
 }

 /**
 * {@inheritDoc}
 * 
 * The method changes the geometry-related data. Therefore,
 * the native windowing system may ignore such requests, or it may modify
 * the requested data, so that the {@code Window} object is placed and sized
 * in a way that corresponds closely to the desktop settings.
 */
 @Override
 public void setLocation(int x, int y) {
 super.setLocation(x, y);
 }

 /**
 * {@inheritDoc}
 * 
 * The method changes the geometry-related data. Therefore,
 * the native windowing system may ignore such requests, or it may modify
 * the requested data, so that the {@code Window} object is placed and sized
 * in a way that corresponds closely to the desktop settings.
 */
 @Override
 public void setLocation(Point p) {
 super.setLocation(p);
 }

 /**
 * @deprecated As of JDK version 1.1,
 * replaced by {@code setBounds(int, int, int, int)}.
 */
 @Deprecated
 public void reshape(int x, int y, int width, int height) {
 if (isMinimumSizeSet()) {
 Dimension minSize = getMinimumSize();
 if (width < minSize.width) {
 width = minSize.width;
 }
 if (height < minSize.height) {
 height = minSize.height;
 }
 }
 super.reshape(x, y, width, height);
 }

 void setClientSize(int w, int h) {
 synchronized (getTreeLock()) {
 setBoundsOp(ComponentPeer.SET_CLIENT_SIZE);
 setBounds(x, y, w, h);
 }
 }

 private static final AtomicBoolean
 beforeFirstWindowShown = new AtomicBoolean(true);

 final void closeSplashScreen() {
 if (isTrayIconWindow) {
 return;
 }
 if (beforeFirstWindowShown.getAndSet(false)) {
 // We don't use SplashScreen.getSplashScreen() to avoid instantiating
 // the object if it hasn't been requested by user code explicitly
 SunToolkit.closeSplashScreen();
 SplashScreen.markClosed();
 }
 }

 /**
 * Shows or hides this {@code Window} depending on the value of parameter
 * {@code b}.
 * 
 * If the method shows the window then the window is also made
 * focused under the following conditions:
 * <ul>
 * <li> The {@code Window} meets the requirements outlined in the
 * {@link #isFocusableWindow} method.
 * <li> The {@code Window}'s {@code autoRequestFocus} property is of the {@code true} value.
 * <li> Native windowing system allows the {@code Window} to get focused.
 * </ul>
 * There is an exception for the second condition (the value of the
 * {@code autoRequestFocus} property). The property is not taken into account if the
 * window is a modal dialog, which blocks the currently focused window.
 * 
 * Developers must never assume that the window is the focused or active window
 * until it receives a WINDOW_GAINED_FOCUS or WINDOW_ACTIVATED event.
 * @param b if {@code true}, makes the {@code Window} visible,
 * otherwise hides the {@code Window}.
 * If the {@code Window} and/or its owner
 * are not yet displayable, both are made displayable. The
 * {@code Window} will be validated prior to being made visible.
 * If the {@code Window} is already visible, this will bring the
 * {@code Window} to the front.
 * If {@code false}, hides this {@code Window}, its subcomponents, and all
 * of its owned children.
 * The {@code Window} and its subcomponents can be made visible again
 * with a call to {@code #setVisible(true)}.
 * @see java.awt.Component#isDisplayable
 * @see java.awt.Component#setVisible
 * @see java.awt.Window#toFront
 * @see java.awt.Window#dispose
 * @see java.awt.Window#setAutoRequestFocus
 * @see java.awt.Window#isFocusableWindow
 */
 public void setVisible(boolean b) {
 super.setVisible(b);
 }

 /**
 * Makes the Window visible. If the Window and/or its owner
 * are not yet displayable, both are made displayable. The
 * Window will be validated prior to being made visible.
 * If the Window is already visible, this will bring the Window
 * to the front.
 * @see Component#isDisplayable
 * @see #toFront
 * @deprecated As of JDK version 1.5, replaced by
 * {@link #setVisible(boolean)}.
 */
 @Deprecated
 public void show() {
 if (peer == null) {
 addNotify();
 }
 validateUnconditionally();

 isInShow = true;
 if (visible) {
 toFront();
 } else {
 beforeFirstShow = false;
 closeSplashScreen();
 Dialog.checkShouldBeBlocked(this);
 super.show();
 locationByPlatform = false;
 for (int i = 0; i < ownedWindowList.size(); i++) {
 Window child = ownedWindowList.elementAt(i).get();
 if ((child != null) && child.showWithParent) {
 child.show();
 child.showWithParent = false;
 } // endif
 } // endfor
 if (!isModalBlocked()) {
 updateChildrenBlocking();
 } else {
 // fix for 6532736: after this window is shown, its blocker
 // should be raised to front
 modalBlocker.toFront_NoClientCode();
 }
 if (this instanceof Frame || this instanceof Dialog) {
 updateChildFocusableWindowState(this);
 }
 }
 isInShow = false;

 // If first time shown, generate WindowOpened event
 if ((state & OPENED) == 0) {
 postWindowEvent(WindowEvent.WINDOW_OPENED);
 state |= OPENED;
 }
 }

 static void updateChildFocusableWindowState(Window w) {
 if (w.peer != null && w.isShowing()) {
 ((WindowPeer)w.peer).updateFocusableWindowState();
 }
 for (int i = 0; i < w.ownedWindowList.size(); i++) {
 Window child = w.ownedWindowList.elementAt(i).get();
 if (child != null) {
 updateChildFocusableWindowState(child);
 }
 }
 }

 synchronized void postWindowEvent(int id) {
 if (windowListener != null
 || (eventMask & AWTEvent.WINDOW_EVENT_MASK) != 0
 || Toolkit.enabledOnToolkit(AWTEvent.WINDOW_EVENT_MASK)) {
 WindowEvent e = new WindowEvent(this, id);
 Toolkit.getEventQueue().postEvent(e);
 }
 }

 /**
 * Hide this Window, its subcomponents, and all of its owned children.
 * The Window and its subcomponents can be made visible again
 * with a call to {@code show}.
 * @see #show
 * @see #dispose
 * @deprecated As of JDK version 1.5, replaced by
 * {@link #setVisible(boolean)}.
 */
 @Deprecated
 public void hide() {
 synchronized(ownedWindowList) {
 for (int i = 0; i < ownedWindowList.size(); i++) {
 Window child = ownedWindowList.elementAt(i).get();
 if ((child != null) && child.visible) {
 child.hide();
 child.showWithParent = true;
 }
 }
 }
 if (isModalBlocked()) {
 modalBlocker.unblockWindow(this);
 }
 super.hide();
 locationByPlatform = false;
 }

 final void clearMostRecentFocusOwnerOnHide() {
 /* do nothing */
 }

 /**
 * Releases all of the native screen resources used by this
 * {@code Window}, its subcomponents, and all of its owned
 * children. That is, the resources for these {@code Component}s
 * will be destroyed, any memory they consume will be returned to the
 * OS, and they will be marked as undisplayable.
 * 
 * The {@code Window} and its subcomponents can be made displayable
 * again by rebuilding the native resources with a subsequent call to
 * {@code pack} or {@code show}. The states of the recreated
 * {@code Window} and its subcomponents will be identical to the
 * states of these objects at the point where the {@code Window}
 * was disposed (not accounting for additional modifications between
 * those actions).
 * 
 * Note: When the last displayable window
 * within the Java virtual machine (VM) is disposed of, the VM may
 * terminate. See <a href="doc-files/AWTThreadIssues.html#Autoshutdown">
 * AWT Threading Issues</a> for more information.
 * @see Component#isDisplayable
 * @see #pack
 * @see #show
 */
 public void dispose() {
 doDispose();
 }

 /*
 * Fix for 4872170.
 * If dispose() is called on parent then its children have to be disposed as well
 * as reported in javadoc. So we need to implement this functionality even if a
 * child overrides dispose() in a wrong way without calling super.dispose().
 */
 void disposeImpl() {
 dispose();
 if (peer != null) {
 doDispose();
 }
 }

 void doDispose() {
 class DisposeAction implements Runnable {
 public void run() {
 disposing = true;
 try {
 // Check if this window is the fullscreen window for the
 // device. Exit the fullscreen mode prior to disposing
 // of the window if that's the case.
 GraphicsDevice gd = getGraphicsConfiguration().getDevice();
 if (gd.getFullScreenWindow() == Window.this) {
 gd.setFullScreenWindow(null);
 }

 Object[] ownedWindowArray;
 synchronized(ownedWindowList) {
 ownedWindowArray = new Object[ownedWindowList.size()];
 ownedWindowList.copyInto(ownedWindowArray);
 }
 for (int i = 0; i < ownedWindowArray.length; i++) {
 Window child = (Window) (((WeakReference)
 (ownedWindowArray[i])).get());
 if (child != null) {
 child.disposeImpl();
 }
 }
 hide();
 beforeFirstShow = true;
 removeNotify();
 synchronized (inputContextLock) {
 if (inputContext != null) {
 inputContext.dispose();
 inputContext = null;
 }
 }
 clearCurrentFocusCycleRootOnHide();
 } finally {
 disposing = false;
 }
 }
 }
 boolean fireWindowClosedEvent = isDisplayable();
 DisposeAction action = new DisposeAction();
 if (EventQueue.isDispatchThread()) {
 action.run();
 }
 else {
 try {
 EventQueue.invokeAndWait(this, action);
 }
 catch (InterruptedException e) {
 System.err.println("Disposal was interrupted:");
 e.printStackTrace();
 }
 catch (InvocationTargetException e) {
 System.err.println("Exception during disposal:");
 e.printStackTrace();
 }
 }
 // Execute outside the Runnable because postWindowEvent is
 // synchronized on (this). We don't need to synchronize the call
 // on the EventQueue anyways.
 if (fireWindowClosedEvent) {
 postWindowEvent(WindowEvent.WINDOW_CLOSED);
 }
 }

 /*
 * Should only be called while holding the tree lock.
 * It's overridden here because parent == owner in Window,
 * and we shouldn't adjust counter on owner
 */
 void adjustListeningChildrenOnParent(long mask, int num) {
 }

 // Should only be called while holding tree lock
 void adjustDescendantsOnParent(int num) {
 // do nothing since parent == owner and we shouldn't
 // adjust counter on owner
 }

 /**
 * If this Window is visible, brings this Window to the front and may make
 * it the focused Window.
 * 
 * Places this Window at the top of the stacking order and shows it in
 * front of any other Windows in this VM. No action will take place if this
 * Window is not visible. Some platforms do not allow Windows which own
 * other Windows to appear on top of those owned Windows. Some platforms
 * may not permit this VM to place its Windows above windows of native
 * applications, or Windows of other VMs. This permission may depend on
 * whether a Window in this VM is already focused. Every attempt will be
 * made to move this Window as high as possible in the stacking order;
 * however, developers should not assume that this method will move this
 * Window above all other windows in every situation.
 * 
 * Developers must never assume that this Window is the focused or active
 * Window until this Window receives a WINDOW_GAINED_FOCUS or WINDOW_ACTIVATED
 * event. On platforms where the top-most window is the focused window, this
 * method will probably focus this Window (if it is not already focused)
 * under the following conditions:
 * <ul>
 * <li> The window meets the requirements outlined in the
 * {@link #isFocusableWindow} method.
 * <li> The window's property {@code autoRequestFocus} is of the
 * {@code true} value.
 * <li> Native windowing system allows the window to get focused.
 * </ul>
 * On platforms where the stacking order does not typically affect the focused
 * window, this method will probably leave the focused and active
 * Windows unchanged.
 * 
 * If this method causes this Window to be focused, and this Window is a
 * Frame or a Dialog, it will also become activated. If this Window is
 * focused, but it is not a Frame or a Dialog, then the first Frame or
 * Dialog that is an owner of this Window will be activated.
 * 
 * If this window is blocked by modal dialog, then the blocking dialog
 * is brought to the front and remains above the blocked window.
 *
 * @see #toBack
 * @see #setAutoRequestFocus
 * @see #isFocusableWindow
 */
 public void toFront() {
 toFront_NoClientCode();
 }

 // This functionality is implemented in a final package-private method
 // to insure that it cannot be overridden by client subclasses.
 final void toFront_NoClientCode() {
 if (visible) {
 WindowPeer peer = (WindowPeer)this.peer;
 if (peer != null) {
 peer.toFront();
 }
 if (isModalBlocked()) {
 modalBlocker.toFront_NoClientCode();
 }
 }
 }

 /**
 * If this Window is visible, sends this Window to the back and may cause
 * it to lose focus or activation if it is the focused or active Window.
 * 
 * Places this Window at the bottom of the stacking order and shows it
 * behind any other Windows in this VM. No action will take place is this
 * Window is not visible. Some platforms do not allow Windows which are
 * owned by other Windows to appear below their owners. Every attempt will
 * be made to move this Window as low as possible in the stacking order;
 * however, developers should not assume that this method will move this
 * Window below all other windows in every situation.
 * 
 * Because of variations in native windowing systems, no guarantees about
 * changes to the focused and active Windows can be made. Developers must
 * never assume that this Window is no longer the focused or active Window
 * until this Window receives a WINDOW_LOST_FOCUS or WINDOW_DEACTIVATED
 * event. On platforms where the top-most window is the focused window,
 * this method will probably cause this Window to lose focus. In
 * that case, the next highest, focusable Window in this VM will receive
 * focus. On platforms where the stacking order does not typically affect
 * the focused window, this method will probably leave the focused
 * and active Windows unchanged.
 *
 * @see #toFront
 */
 public void toBack() {
 toBack_NoClientCode();
 }

 // This functionality is implemented in a final package-private method
 // to insure that it cannot be overridden by client subclasses.
 final void toBack_NoClientCode() {
 if(isAlwaysOnTop()) {
 try {
 setAlwaysOnTop(false);
 }catch(SecurityException e) {
 }
 }
 if (visible) {
 WindowPeer peer = (WindowPeer)this.peer;
 if (peer != null) {
 peer.toBack();
 }
 }
 }

 /**
 * Returns the toolkit of this frame.
 * @return the toolkit of this window.
 * @see Toolkit
 * @see Toolkit#getDefaultToolkit
 * @see Component#getToolkit
 */
 public Toolkit getToolkit() {
 return Toolkit.getDefaultToolkit();
 }

 /**
 * Gets the warning string that is displayed with this window.
 * If this window is insecure, the warning string is displayed
 * somewhere in the visible area of the window. A window is
 * insecure if there is a security manager and the security
 * manager denies
 * {@code AWTPermission("showWindowWithoutWarningBanner")}.
 * 
 * If the window is secure, then {@code getWarningString}
 * returns {@code null}. If the window is insecure, this
 * method checks for the system property
 * {@code awt.appletWarning}
 * and returns the string value of that property.
 * @return the warning string for this window.
 */
 public final String getWarningString() {
 return warningString;
 }

 @SuppressWarnings("removal")
 private void setWarningString() {
 warningString = null;
 SecurityManager sm = System.getSecurityManager();
 if (sm != null) {
 try {
 sm.checkPermission(AWTPermissions.TOPLEVEL_WINDOW_PERMISSION);
 } catch (SecurityException se) {
 // make sure the privileged action is only
 // for getting the property! We don't want the
 // above checkPermission call to always succeed!
 warningString = AccessController.doPrivileged(
 new GetPropertyAction("awt.appletWarning",
 "Java Applet Window"));
 }
 }
 }

 /**
 * Gets the {@code Locale} object that is associated
 * with this window, if the locale has been set.
 * If no locale has been set, then the default locale
 * is returned.
 * @return the locale that is set for this window.
 * @see java.util.Locale
 * @since 1.1
 */
 public Locale getLocale() {
 if (this.locale == null) {
 return Locale.getDefault();
 }
 return this.locale;
 }

 /**
 * Gets the input context for this window. A window always has an input context,
 * which is shared by subcomponents unless they create and set their own.
 * @see Component#getInputContext
 * @since 1.2
 */
 public InputContext getInputContext() {
 synchronized (inputContextLock) {
 if (inputContext == null) {
 inputContext = InputContext.getInstance();
 }
 }
 return inputContext;
 }

 /**
 * Set the cursor image to a specified cursor.
 * 
 * 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 One of the constants defined
 * by the {@code Cursor} class. If this parameter is null
 * then the cursor for this window will be set to the type
 * Cursor.DEFAULT_CURSOR.
 * @see Component#getCursor
 * @see Cursor
 * @since 1.1
 */
 public void setCursor(Cursor cursor) {
 if (cursor == null) {
 cursor = Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
 }
 super.setCursor(cursor);
 }

 /**
 * Returns the owner of this window.
 *
 * @return the owner of this window
 * @since 1.2
 */
 public Window getOwner() {
 return getOwner_NoClientCode();
 }
 final Window getOwner_NoClientCode() {
 return (Window)parent;
 }

 /**
 * Return an array containing all the windows this
 * window currently owns.
 *
 * @return the array of all the owned windows
 * @since 1.2
 */
 public Window[] getOwnedWindows() {
 return getOwnedWindows_NoClientCode();
 }
 final Window[] getOwnedWindows_NoClientCode() {
 Window[] realCopy;

 synchronized(ownedWindowList) {
 // Recall that ownedWindowList is actually a Vector of
 // WeakReferences and calling get() on one of these references
 // may return null. Make two arrays-- one the size of the
 // Vector (fullCopy with size fullSize), and one the size of
 // all non-null get()s (realCopy with size realSize).
 int fullSize = ownedWindowList.size();
 int realSize = 0;
 Window[] fullCopy = new Window[fullSize];

 for (int i = 0; i < fullSize; i++) {
 fullCopy[realSize] = ownedWindowList.elementAt(i).get();

 if (fullCopy[realSize] != null) {
 realSize++;
 }
 }

 if (fullSize != realSize) {
 realCopy = Arrays.copyOf(fullCopy, realSize);
 } else {
 realCopy = fullCopy;
 }
 }

 return realCopy;
 }

 boolean isModalBlocked() {
 return modalBlocker != null;
 }

 void setModalBlocked(Dialog blocker, boolean blocked, boolean peerCall) {
 this.modalBlocker = blocked ? blocker : null;
 if (peerCall) {
 WindowPeer peer = (WindowPeer)this.peer;
 if (peer != null) {
 peer.setModalBlocked(blocker, blocked);
 }
 }
 }

 Dialog getModalBlocker() {
 return modalBlocker;
 }

 /*
 * Returns a list of all displayable Windows, i. e. all the
 * Windows which peer is not null.
 *
 * @see #addNotify
 * @see #removeNotify
 */
 static IdentityArrayList<Window> getAllWindows() {
 synchronized (allWindows) {
 IdentityArrayList<Window> v = new IdentityArrayList<Window>();
 v.addAll(allWindows);
 return v;
 }
 }

 static IdentityArrayList<Window> getAllUnblockedWindows() {
 synchronized (allWindows) {
 IdentityArrayList<Window> unblocked = new IdentityArrayList<Window>();
 for (int i = 0; i < allWindows.size(); i++) {
 Window w = allWindows.get(i);
 if (!w.isModalBlocked()) {
 unblocked.add(w);
 }
 }
 return unblocked;
 }
 }

 private static Window[] getWindows(AppContext appContext) {
 synchronized (Window.class) {
 Window[] realCopy;
 @SuppressWarnings("unchecked")
 Vector<WeakReference<Window>> windowList =
 (Vector<WeakReference<Window>>)appContext.get(Window.class);
 if (windowList != null) {
 int fullSize = windowList.size();
 int realSize = 0;
 Window[] fullCopy = new Window[fullSize];
 for (int i = 0; i < fullSize; i++) {
 Window w = windowList.get(i).get();
 if (w != null) {
 fullCopy[realSize++] = w;
 }
 }
 if (fullSize != realSize) {
 realCopy = Arrays.copyOf(fullCopy, realSize);
 } else {
 realCopy = fullCopy;
 }
 } else {
 realCopy = new Window[0];
 }
 return realCopy;
 }
 }

 /**
 * Returns an array of all {@code Window}s, both owned and ownerless,
 * created by this application.
 * If called from an applet, the array includes only the {@code Window}s
 * accessible by that applet.
 * 
 * Warning: this method may return system created windows, such
 * as a print dialog. Applications should not assume the existence of
 * these dialogs, nor should an application assume anything about these
 * dialogs such as component positions, {@code LayoutManager}s
 * or serialization.
 *
 * @return the array of all the {@code Window}s created by the application
 * @see Frame#getFrames
 * @see Window#getOwnerlessWindows
 *
 * @since 1.6
 */
 public static Window[] getWindows() {
 return getWindows(AppContext.getAppContext());
 }

 /**
 * Returns an array of all {@code Window}s created by this application
 * that have no owner. They include {@code Frame}s and ownerless
 * {@code Dialog}s and {@code Window}s.
 * If called from an applet, the array includes only the {@code Window}s
 * accessible by that applet.
 * 
 * Warning: this method may return system created windows, such
 * as a print dialog. Applications should not assume the existence of
 * these dialogs, nor should an application assume anything about these
 * dialogs such as component positions, {@code LayoutManager}s
 * or serialization.
 *
 * @return the array of all the ownerless {@code Window}s
 * created by this application
 * @see Frame#getFrames
 * @see Window#getWindows()
 *
 * @since 1.6
 */
 public static Window[] getOwnerlessWindows() {
 Window[] allWindows = Window.getWindows();

 int ownerlessCount = 0;
 for (Window w : allWindows) {
 if (w.getOwner() == null) {
 ownerlessCount++;
 }
 }

 Window[] ownerless = new Window[ownerlessCount];
 int c = 0;
 for (Window w : allWindows) {
 if (w.getOwner() == null) {
 ownerless[c++] = w;
 }
 }

 return ownerless;
 }

 Window getDocumentRoot() {
 synchronized (getTreeLock()) {
 Window w = this;
 while (w.getOwner() != null) {
 w = w.getOwner();
 }
 return w;
 }
 }

 /**
 * Specifies the modal exclusion type for this window. If a window is modal
 * excluded, it is not blocked by some modal dialogs. See {@link
 * java.awt.Dialog.ModalExclusionType Dialog.ModalExclusionType} for
 * possible modal exclusion types.
 * 
 * If the given type is not supported, {@code NO_EXCLUDE} is used.
 * 
 * Note: changing the modal exclusion type for a visible window may have no
 * effect until it is hidden and then shown again.
 *
 * @param exclusionType the modal exclusion type for this window; a {@code null}
 * value is equivalent to {@link Dialog.ModalExclusionType#NO_EXCLUDE
 * NO_EXCLUDE}
 * @throws SecurityException if the calling thread does not have permission
 * to set the modal exclusion property to the window with the given
 * {@code exclusionType}
 * @see java.awt.Dialog.ModalExclusionType
 * @see java.awt.Window#getModalExclusionType
 * @see java.awt.Toolkit#isModalExclusionTypeSupported
 *
 * @since 1.6
 */
 public void setModalExclusionType(Dialog.ModalExclusionType exclusionType) {
 if (exclusionType == null) {
 exclusionType = Dialog.ModalExclusionType.NO_EXCLUDE;
 }
 if (!Toolkit.getDefaultToolkit().isModalExclusionTypeSupported(exclusionType)) {
 exclusionType = Dialog.ModalExclusionType.NO_EXCLUDE;
 }
 if (modalExclusionType == exclusionType) {
 return;
 }
 if (exclusionType == Dialog.ModalExclusionType.TOOLKIT_EXCLUDE) {
 @SuppressWarnings("removal")
 SecurityManager sm = System.getSecurityManager();
 if (sm != null) {
 sm.checkPermission(AWTPermissions.TOOLKIT_MODALITY_PERMISSION);
 }
 }
 modalExclusionType = exclusionType;

 // if we want on-fly changes, we need to uncomment the lines below
 // and override the method in Dialog to use modalShow() instead
 // of updateChildrenBlocking()
/*
 if (isModalBlocked()) {
 modalBlocker.unblockWindow(this);
 }
 Dialog.checkShouldBeBlocked(this);
 updateChildrenBlocking();
*/
 }

 /**
 * Returns the modal exclusion type of this window.
 *
 * @return the modal exclusion type of this window
 *
 * @see java.awt.Dialog.ModalExclusionType
 * @see java.awt.Window#setModalExclusionType
 *
 * @since 1.6
 */
 public Dialog.ModalExclusionType getModalExclusionType() {
 return modalExclusionType;
 }

 boolean isModalExcluded(Dialog.ModalExclusionType exclusionType) {
 if ((modalExclusionType != null) &&
 modalExclusionType.compareTo(exclusionType) >= 0)
 {
 return true;
 }
 Window owner = getOwner_NoClientCode();
 return (owner != null) && owner.isModalExcluded(exclusionType);
 }

 void updateChildrenBlocking() {
 ArrayList<Window> childHierarchy = new ArrayList<>();
 Window[] ownedWindows = getOwnedWindows();
 for (int i = 0; i < ownedWindows.length; i++) {
 childHierarchy.add(ownedWindows[i]);
 }
 int k = 0;
 while (k < childHierarchy.size()) {
 Window w = childHierarchy.get(k);
 if (w.isVisible()) {
 if (w.isModalBlocked()) {
 Dialog blocker = w.getModalBlocker();
 blocker.unblockWindow(w);
 }
 Dialog.checkShouldBeBlocked(w);
 Window[] wOwned = w.getOwnedWindows();
 for (int j = 0; j < wOwned.length; j++) {
 childHierarchy.add(wOwned[j]);
 }
 }
 k++;
 }
 }

 /**
 * Adds the specified window listener to receive window events from
 * this window.
 * If l is null, no exception is thrown and no action is performed.
 * Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
 * >AWT Threading Issues</a> for details on AWT's threading model.
 *
 * @param l the window listener
 * @see #removeWindowListener
 * @see #getWindowListeners
 */
 public synchronized void addWindowListener(WindowListener l) {
 if (l == null) {
 return;
 }
 newEventsOnly = true;
 windowListener = AWTEventMulticaster.add(windowListener, l);
 }

 /**
 * Adds the specified window state listener to receive window
 * events from this window. If {@code l} is {@code null},
 * no exception is thrown and no action is performed.
 * Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
 * >AWT Threading Issues</a> for details on AWT's threading model.
 *
 * @param l the window state listener
 * @see #removeWindowStateListener
 * @see #getWindowStateListeners
 * @since 1.4
 */
 public synchronized void addWindowStateListener(WindowStateListener l) {
 if (l == null) {
 return;
 }
 windowStateListener = AWTEventMulticaster.add(windowStateListener, l);
 newEventsOnly = true;
 }

 /**
 * Adds the specified window focus listener to receive window events
 * from this window.
 * If l is null, no exception is thrown and no action is performed.
 * Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
 * >AWT Threading Issues</a> for details on AWT's threading model.
 *
 * @param l the window focus listener
 * @see #removeWindowFocusListener
 * @see #getWindowFocusListeners
 * @since 1.4
 */
 public synchronized void addWindowFocusListener(WindowFocusListener l) {
 if (l == null) {
 return;
 }
 windowFocusListener = AWTEventMulticaster.add(windowFocusListener, l);
 newEventsOnly = true;
 }

 /**
 * Removes the specified window listener so that it no longer
 * receives window events from this window.
 * If l is null, no exception is thrown and no action is performed.
 * Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
 * >AWT Threading Issues</a> for details on AWT's threading model.
 *
 * @param l the window listener
 * @see #addWindowListener
 * @see #getWindowListeners
 */
 public synchronized void removeWindowListener(WindowListener l) {
 if (l == null) {
 return;
 }
 windowListener = AWTEventMulticaster.remove(windowListener, l);
 }

 /**
 * Removes the specified window state listener so that it no
 * longer receives window events from this window. If
 * {@code l} is {@code null}, no exception is thrown and
 * no action is performed.
 * Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
 * >AWT Threading Issues</a> for details on AWT's threading model.
 *
 * @param l the window state listener
 * @see #addWindowStateListener
 * @see #getWindowStateListeners
 * @since 1.4
 */
 public synchronized void removeWindowStateListener(WindowStateListener l) {
 if (l == null) {
 return;
 }
 windowStateListener = AWTEventMulticaster.remove(windowStateListener, l);
 }

 /**
 * Removes the specified window focus listener so that it no longer
 * receives window events from this window.
 * If l is null, no exception is thrown and no action is performed.
 * Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
 * >AWT Threading Issues</a> for details on AWT's threading model.
 *
 * @param l the window focus listener
 * @see #addWindowFocusListener
 * @see #getWindowFocusListeners
 * @since 1.4
 */
 public synchronized void removeWindowFocusListener(WindowFocusListener l) {
 if (l == null) {
 return;
 }
 windowFocusListener = AWTEventMulticaster.remove(windowFocusListener, l);
 }

 /**
 * Returns an array of all the window listeners
 * registered on this window.
 *
 * @return all of this window's {@code WindowListener}s
 * or an empty array if no window
 * listeners are currently registered
 *
 * @see #addWindowListener
 * @see #removeWindowListener
 * @since 1.4
 */
 public synchronized WindowListener[] getWindowListeners() {
 return getListeners(WindowListener.class);
 }

 /**
 * Returns an array of all the window focus listeners
 * registered on this window.
 *
 * @return all of this window's {@code WindowFocusListener}s
 * or an empty array if no window focus
 * listeners are currently registered
 *
 * @see #addWindowFocusListener
 * @see #removeWindowFocusListener
 * @since 1.4
 */
 public synchronized WindowFocusListener[] getWindowFocusListeners() {
 return getListeners(WindowFocusListener.class);
 }

 /**
 * Returns an array of all the window state listeners
 * registered on this window.
 *
 * @return all of this window's {@code WindowStateListener}s
 * or an empty array if no window state
 * listeners are currently registered
 *
 * @see #addWindowStateListener
 * @see #removeWindowStateListener
 * @since 1.4
 */
 public synchronized WindowStateListener[] getWindowStateListeners() {
 return getListeners(WindowStateListener.class);
 }

 /**
 * Returns an array of all the objects currently registered
 * as <code>FooListener</code>s
 * upon this {@code Window}.
 * <code>FooListener</code>s are registered using the
 * <code>addFooListener</code> method.
 *
 * 
 *
 * You can specify the {@code listenerType} argument
 * with a class literal, such as
 * <code>FooListener.class</code>.
 * For example, you can query a
 * {@code Window w}
 * for its window listeners with the following code:
 *
 * <pre>WindowListener[] wls = (WindowListener[])(w.getListeners(WindowListener.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}
 * @return an array of all objects registered as
 * <code>FooListener</code>s on this window,
 * or an empty array if no such
 * listeners have been added
 * @throws ClassCastException if {@code listenerType}
 * doesn't specify a class or interface that implements
 * {@code java.util.EventListener}
 * @throws NullPointerException if {@code listenerType} is {@code null}
 *
 * @see #getWindowListeners
 * @since 1.3
 */
 public <T extends EventListener> T[] getListeners(Class<T> listenerType) {
 EventListener l = null;
 if (listenerType == WindowFocusListener.class) {
 l = windowFocusListener;
 } else if (listenerType == WindowStateListener.class) {
 l = windowStateListener;
 } else if (listenerType == WindowListener.class) {
 l = windowListener;
 } else {
 return super.getListeners(listenerType);
 }
 return AWTEventMulticaster.getListeners(l, listenerType);
 }

 // REMIND: remove when filtering is handled at lower level
 boolean eventEnabled(AWTEvent e) {
 switch(e.id) {
 case WindowEvent.WINDOW_OPENED:
 case WindowEvent.WINDOW_CLOSING:
 case WindowEvent.WINDOW_CLOSED:
 case WindowEvent.WINDOW_ICONIFIED:
 case WindowEvent.WINDOW_DEICONIFIED:
 case WindowEvent.WINDOW_ACTIVATED:
 case WindowEvent.WINDOW_DEACTIVATED:
 if ((eventMask & AWTEvent.WINDOW_EVENT_MASK) != 0 ||
 windowListener != null) {
 return true;
 }
 return false;
 case WindowEvent.WINDOW_GAINED_FOCUS:
 case WindowEvent.WINDOW_LOST_FOCUS:
 if ((eventMask & AWTEvent.WINDOW_FOCUS_EVENT_MASK) != 0 ||
 windowFocusListener != null) {
 return true;
 }
 return false;
 case WindowEvent.WINDOW_STATE_CHANGED:
 if ((eventMask & AWTEvent.WINDOW_STATE_EVENT_MASK) != 0 ||
 windowStateListener != null) {
 return true;
 }
 return false;
 default:
 break;
 }
 return super.eventEnabled(e);
 }

 /**
 * Processes events on this window. If the event is an
 * {@code WindowEvent}, it invokes the
 * {@code processWindowEvent} method, else it invokes its
 * superclass's {@code processEvent}.
 * Note that if the event parameter is {@code null}
 * the behavior is unspecified and may result in an
 * exception.
 *
 * @param e the event
 */
 protected void processEvent(AWTEvent e) {
 if (e instanceof WindowEvent) {
 switch (e.getID()) {
 case WindowEvent.WINDOW_OPENED:
 case WindowEvent.WINDOW_CLOSING:
 case WindowEvent.WINDOW_CLOSED:
 case WindowEvent.WINDOW_ICONIFIED:
 case WindowEvent.WINDOW_DEICONIFIED:
 case WindowEvent.WINDOW_ACTIVATED:
 case WindowEvent.WINDOW_DEACTIVATED:
 processWindowEvent((WindowEvent)e);
 break;
 case WindowEvent.WINDOW_GAINED_FOCUS:
 case WindowEvent.WINDOW_LOST_FOCUS:
 processWindowFocusEvent((WindowEvent)e);
 break;
 case WindowEvent.WINDOW_STATE_CHANGED:
 processWindowStateEvent((WindowEvent)e);
 break;
 }
 return;
 }
 super.processEvent(e);
 }

 /**
 * Processes window events occurring on this window by
 * dispatching them to any registered WindowListener objects.
 * NOTE: This method will not be called unless window events
 * are enabled for this component; this happens when one of the
 * following occurs:
 * <ul>
 * <li>A WindowListener object is registered via
 * {@code addWindowListener}
 * <li>Window events are enabled via {@code enableEvents}
 * </ul>
 * Note that if the event parameter is {@code null}
 * the behavior is unspecified and may result in an
 * exception.
 *
 * @param e the window event
 * @see Component#enableEvents
 */
 protected void processWindowEvent(WindowEvent e) {
 WindowListener listener = windowListener;
 if (listener != null) {
 switch(e.getID()) {
 case WindowEvent.WINDOW_OPENED:
 listener.windowOpened(e);
 break;
 case WindowEvent.WINDOW_CLOSING:
 listener.windowClosing(e);
 break;
 case WindowEvent.WINDOW_CLOSED:
 listener.windowClosed(e);
 break;
 case WindowEvent.WINDOW_ICONIFIED:
 listener.windowIconified(e);
 break;
 case WindowEvent.WINDOW_DEICONIFIED:
 listener.windowDeiconified(e);
 break;
 case WindowEvent.WINDOW_ACTIVATED:
 listener.windowActivated(e);
 break;
 case WindowEvent.WINDOW_DEACTIVATED:
 listener.windowDeactivated(e);
 break;
 default:
 break;
 }
 }
 }

 /**
 * Processes window focus event occurring on this window by
 * dispatching them to any registered WindowFocusListener objects.
 * NOTE: this method will not be called unless window focus events
 * are enabled for this window. This happens when one of the
 * following occurs:
 * <ul>
 * <li>a WindowFocusListener is registered via
 * {@code addWindowFocusListener}
 * <li>Window focus events are enabled via {@code enableEvents}
 * </ul>
 * Note that if the event parameter is {@code null}
 * the behavior is unspecified and may result in an
 * exception.
 *
 * @param e the window focus event
 * @see Component#enableEvents
 * @since 1.4
 */
 protected void processWindowFocusEvent(WindowEvent e) {
 WindowFocusListener listener = windowFocusListener;
 if (listener != null) {
 switch (e.getID()) {
 case WindowEvent.WINDOW_GAINED_FOCUS:
 listener.windowGainedFocus(e);
 break;
 case WindowEvent.WINDOW_LOST_FOCUS:
 listener.windowLostFocus(e);
 break;
 default:
 break;
 }
 }
 }

 /**
 * Processes window state event occurring on this window by
 * dispatching them to any registered {@code WindowStateListener}
 * objects.
 * NOTE: this method will not be called unless window state events
 * are enabled for this window. This happens when one of the
 * following occurs:
 * <ul>
 * <li>a {@code WindowStateListener} is registered via
 * {@code addWindowStateListener}
 * <li>window state events are enabled via {@code enableEvents}
 * </ul>
 * Note that if the event parameter is {@code null}
 * the behavior is unspecified and may result in an
 * exception.
 *
 * @param e the window state event
 * @see java.awt.Component#enableEvents
 * @since 1.4
 */
 protected void processWindowStateEvent(WindowEvent e) {
 WindowStateListener listener = windowStateListener;
 if (listener != null) {
 switch (e.getID()) {
 case WindowEvent.WINDOW_STATE_CHANGED:
 listener.windowStateChanged(e);
 break;
 default:
 break;
 }
 }
 }

 /**
 * Implements a debugging hook -- checks to see if
 * the user has typed control-shift-F1. If so,
 * the list of child windows is dumped to {@code System.out}.
 * @param e the keyboard event
 */
 void preProcessKeyEvent(KeyEvent e) {
 // Dump the list of child windows to System.out if debug is enabled.
 if (DebugSettings.getInstance().getBoolean("on", false)) {
 if (e.isActionKey() && e.getKeyCode() == KeyEvent.VK_F1 &&
 e.isControlDown() && e.isShiftDown() &&
 e.getID() == KeyEvent.KEY_PRESSED) {
 list(System.out, 0);
 }
 }
 }

 void postProcessKeyEvent(KeyEvent e) {
 // Do nothing
 }

 /**
 * Sets whether this window should always be above other windows. If
 * there are multiple always-on-top windows, their relative order is
 * unspecified and platform dependent.
 * 
 * If some other window is already always-on-top then the
 * relative order between these windows is unspecified (depends on
 * platform). No window can be brought to be over the always-on-top
 * window except maybe another always-on-top window.
 * 
 * All windows owned by an always-on-top window inherit this state and
 * automatically become always-on-top. If a window ceases to be
 * always-on-top, the windows that it owns will no longer be
 * always-on-top. When an always-on-top window is sent {@link #toBack
 * toBack}, its always-on-top state is set to {@code false}.
 *
 * When this method is called on a window with a value of
 * {@code true}, and the window is visible and the platform
 * supports always-on-top for this window, the window is immediately
 * brought forward, "sticking" it in the top-most position. If the
 * window isn`t currently visible, this method sets the always-on-top
 * state to {@code true} but does not bring the window forward.
 * When the window is later shown, it will be always-on-top.
 *
 * When this method is called on a window with a value of
 * {@code false} the always-on-top state is set to normal. It may also
 * cause an unspecified, platform-dependent change in the z-order of
 * top-level windows, but other always-on-top windows will remain in
 * top-most position. Calling this method with a value of {@code false}
 * on a window that has a normal state has no effect.
 *
 * Note: some platforms might not support always-on-top
 * windows. To detect if always-on-top windows are supported by the
 * current platform, use {@link Toolkit#isAlwaysOnTopSupported()} and
 * {@link Window#isAlwaysOnTopSupported()}. If always-on-top mode
 * isn't supported for this window or this window's toolkit does not
 * support always-on-top windows, calling this method has no effect.
 * 
 * If a SecurityManager is installed, the calling thread must be
 * granted the AWTPermission "setWindowAlwaysOnTop" in
 * order to set the value of this property. If this
 * permission is not granted, this method will throw a
 * SecurityException, and the current value of the property will
 * be left unchanged.
 *
 * @param alwaysOnTop true if the window should always be above other
 * windows
 * @throws SecurityException if the calling thread does not have
 * permission to set the value of always-on-top property
 *
 * @see #isAlwaysOnTop
 * @see #toFront
 * @see #toBack
 * @see AWTPermission
 * @see #isAlwaysOnTopSupported
 * @see #getToolkit
 * @see Toolkit#isAlwaysOnTopSupported
 * @since 1.5
 */
 public final void setAlwaysOnTop(boolean alwaysOnTop) throws SecurityException {
 @SuppressWarnings("removal")
 SecurityManager security = System.getSecurityManager();
 if (security != null) {
 security.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
 }

 boolean oldAlwaysOnTop;
 synchronized(this) {
 oldAlwaysOnTop = this.alwaysOnTop;
 this.alwaysOnTop = alwaysOnTop;
 }
 if (oldAlwaysOnTop != alwaysOnTop ) {
 if (isAlwaysOnTopSupported()) {
 WindowPeer peer = (WindowPeer)this.peer;
 synchronized(getTreeLock()) {
 if (peer != null) {
 peer.updateAlwaysOnTopState();
 }
 }
 }
 firePropertyChange("alwaysOnTop", oldAlwaysOnTop, alwaysOnTop);
 }
 setOwnedWindowsAlwaysOnTop(alwaysOnTop);
 }

 @SuppressWarnings({"rawtypes", "unchecked"})
 private void setOwnedWindowsAlwaysOnTop(boolean alwaysOnTop) {
 WeakReference<Window>[] ownedWindowArray;
 synchronized (ownedWindowList) {
 ownedWindowArray = new WeakReference[ownedWindowList.size()];
 ownedWindowList.copyInto(ownedWindowArray);
 }

 for (WeakReference<Window> ref : ownedWindowArray) {
 Window window = ref.get();
 if (window != null) {
 try {
 window.setAlwaysOnTop(alwaysOnTop);
 } catch (SecurityException ignore) {
 }
 }
 }
 }

 /**
 * Returns whether the always-on-top mode is supported for this
 * window. Some platforms may not support always-on-top windows, some
 * may support only some kinds of top-level windows; for example,
 * a platform may not support always-on-top modal dialogs.
 *
 * @return {@code true}, if the always-on-top mode is supported for
 * this window and this window's toolkit supports always-on-top windows,
 * {@code false} otherwise
 *
 * @see #setAlwaysOnTop(boolean)
 * @see #getToolkit
 * @see Toolkit#isAlwaysOnTopSupported
 * @since 1.6
 */
 public boolean isAlwaysOnTopSupported() {
 return Toolkit.getDefaultToolkit().isAlwaysOnTopSupported();
 }

 /**
 * Returns whether this window is an always-on-top window.
 * @return {@code true}, if the window is in always-on-top state,
 * {@code false} otherwise
 * @see #setAlwaysOnTop
 * @since 1.5
 */
 public final boolean isAlwaysOnTop() {
 return alwaysOnTop;
 }

 /**
 * Returns the child Component of this Window that has focus if this Window
 * is focused; returns null otherwise.
 *
 * @return the child Component with focus, or null if this Window is not
 * focused
 * @see #getMostRecentFocusOwner
 * @see #isFocused
 */
 public Component getFocusOwner() {
 return (isFocused())
 ? KeyboardFocusManager.getCurrentKeyboardFocusManager().
 getFocusOwner()
 : null;
 }

 /**
 * Returns the child Component of this Window that will receive the focus
 * when this Window is focused. If this Window is currently focused, this
 * method returns the same Component as {@code getFocusOwner()}. If
 * this Window is not focused, then the child Component that most recently
 * requested focus will be returned. If no child Component has ever
 * requested focus, and this is a focusable Window, then this Window's
 * initial focusable Component is returned. If no child Component has ever
 * requested focus, and this is a non-focusable Window, null is returned.
 *
 * @return the child Component that will receive focus when this Window is
 * focused
 * @see #getFocusOwner
 * @see #isFocused
 * @see #isFocusableWindow
 * @since 1.4
 */
 public Component getMostRecentFocusOwner() {
 if (isFocused()) {
 return getFocusOwner();
 } else {
 Component mostRecent =
 KeyboardFocusManager.getMostRecentFocusOwner(this);
 if (mostRecent != null) {
 return mostRecent;
 } else {
 return (isFocusableWindow())
 ? getFocusTraversalPolicy().getInitialComponent(this)
 : null;
 }
 }
 }

 /**
 * Returns whether this Window is active. Only a Frame or a Dialog may be
 * active. The native windowing system may denote the active Window or its
 * children with special decorations, such as a highlighted title bar. The
 * active Window is always either the focused Window, or the first Frame or
 * Dialog that is an owner of the focused Window.
 *
 * @return whether this is the active Window.
 * @see #isFocused
 * @since 1.4
 */
 public boolean isActive() {
 return (KeyboardFocusManager.getCurrentKeyboardFocusManager().
 getActiveWindow() == this);
 }

 /**
 * Returns whether this Window is focused. If there exists a focus owner,
 * the focused Window is the Window that is, or contains, that focus owner.
 * If there is no focus owner, then no Window is focused.
 * 
 * If the focused Window is a Frame or a Dialog it is also the active
 * Window. Otherwise, the active Window is the first Frame or Dialog that
 * is an owner of the focused Window.
 *
 * @return whether this is the focused Window.
 * @see #isActive
 * @since 1.4
 */
 public boolean isFocused() {
 return (KeyboardFocusManager.getCurrentKeyboardFocusManager().
 getGlobalFocusedWindow() == this);
 }

 /**
 * Gets a focus traversal key for this Window. (See {@code
 * setFocusTraversalKeys} for a full description of each key.)
 * 
 * If the traversal key has not been explicitly set for this Window,
 * then this Window's parent's traversal key is returned. If the
 * traversal key has not been explicitly set for any of this Window's
 * ancestors, then the current KeyboardFocusManager's default traversal key
 * is returned.
 *
 * @param id one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
 * KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
 * KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or
 * KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
 * @return the AWTKeyStroke for the specified key
 * @see Container#setFocusTraversalKeys
 * @see KeyboardFocusManager#FORWARD_TRAVERSAL_KEYS
 * @see KeyboardFocusManager#BACKWARD_TRAVERSAL_KEYS
 * @see KeyboardFocusManager#UP_CYCLE_TRAVERSAL_KEYS
 * @see KeyboardFocusManager#DOWN_CYCLE_TRAVERSAL_KEYS
 * @throws IllegalArgumentException if id is not one of
 * KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
 * KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
 * KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or
 * KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS
 * @since 1.4
 */
 @SuppressWarnings("unchecked")
 public Set<AWTKeyStroke> getFocusTraversalKeys(int id) {
 if (id < 0 || id >= KeyboardFocusManager.TRAVERSAL_KEY_LENGTH) {
 throw new IllegalArgumentException("invalid focus traversal key identifier");
 }

 // Okay to return Set directly because it is an unmodifiable view
 @SuppressWarnings("rawtypes")
 Set keystrokes = (focusTraversalKeys != null)
 ? focusTraversalKeys[id]
 : null;

 if (keystrokes != null) {
 return keystrokes;
 } else {
 return KeyboardFocusManager.getCurrentKeyboardFocusManager().
 getDefaultFocusTraversalKeys(id);
 }
 }

 /**
 * Does nothing because Windows must always be roots of a focus traversal
 * cycle. The passed-in value is ignored.
 *
 * @param focusCycleRoot this value is ignored
 * @see #isFocusCycleRoot
 * @see Container#setFocusTraversalPolicy
 * @see Container#getFocusTraversalPolicy
 * @since 1.4
 */
 public final void setFocusCycleRoot(boolean focusCycleRoot) {
 }

 /**
 * Always returns {@code true} because all Windows must be roots of a
 * focus traversal cycle.
 *
 * @return {@code true}
 * @see #setFocusCycleRoot
 * @see Container#setFocusTraversalPolicy
 * @see Container#getFocusTraversalPolicy
 * @since 1.4
 */
 public final boolean isFocusCycleRoot() {
 return true;
 }

 /**
 * Always returns {@code null} because Windows have no ancestors; they
 * represent the top of the Component hierarchy.
 *
 * @return {@code null}
 * @see Container#isFocusCycleRoot()
 * @since 1.4
 */
 public final Container getFocusCycleRootAncestor() {
 return null;
 }

 /**
 * Returns whether this Window can become the focused Window, that is,
 * whether this Window or any of its subcomponents can become the focus
 * owner. For a Frame or Dialog to be focusable, its focusable Window state
 * must be set to {@code true}. For a Window which is not a Frame or
 * Dialog to be focusable, its focusable Window state must be set to
 * {@code true}, its nearest owning Frame or Dialog must be
 * showing on the screen, and it must contain at least one Component in
 * its focus traversal cycle. If any of these conditions is not met, then
 * neither this Window nor any of its subcomponents can become the focus
 * owner.
 *
 * @return {@code true} if this Window can be the focused Window;
 * {@code false} otherwise
 * @see #getFocusableWindowState
 * @see #setFocusableWindowState
 * @see #isShowing
 * @see Component#isFocusable
 * @since 1.4
 */
 public final boolean isFocusableWindow() {
 // If a Window/Frame/Dialog was made non-focusable, then it is always
 // non-focusable.
 if (!getFocusableWindowState()) {
 return false;
 }

 // All other tests apply only to Windows.
 if (this instanceof Frame || this instanceof Dialog) {
 return true;
 }

 // A Window must have at least one Component in its root focus
 // traversal cycle to be focusable.
 if (getFocusTraversalPolicy().getDefaultComponent(this) == null) {
 return false;
 }

 // A Window's nearest owning Frame or Dialog must be showing on the
 // screen.
 for (Window owner = getOwner(); owner != null;
 owner = owner.getOwner())
 {
 if (owner instanceof Frame || owner instanceof Dialog) {
 return owner.isShowing();
 }
 }

 return false;
 }

 /**
 * Returns whether this Window can become the focused Window if it meets
 * the other requirements outlined in {@code isFocusableWindow}. If
 * this method returns {@code false}, then
 * {@code isFocusableWindow} will return {@code false} as well.
 * If this method returns {@code true}, then
 * {@code isFocusableWindow} may return {@code true} or
 * {@code false} depending upon the other requirements which must be
 * met in order for a Window to be focusable.
 * 
 * By default, all Windows have a focusable Window state of
 * {@code true}.
 *
 * @return whether this Window can be the focused Window
 * @see #isFocusableWindow
 * @see #setFocusableWindowState
 * @see #isShowing
 * @see Component#setFocusable
 * @since 1.4
 */
 public boolean getFocusableWindowState() {
 return focusableWindowState;
 }

 /**
 * Sets whether this Window can become the focused Window if it meets
 * the other requirements outlined in {@code isFocusableWindow}. If
 * this Window's focusable Window state is set to {@code false}, then
 * {@code isFocusableWindow} will return {@code false}. If this
 * Window's focusable Window state is set to {@code true}, then
 * {@code isFocusableWindow} may return {@code true} or
 * {@code false} depending upon the other requirements which must be
 * met in order for a Window to be focusable.
 * 
 * Setting a Window's focusability state to {@code false} is the
 * standard mechanism for an application to identify to the AWT a Window
 * which will be used as a floating palette or toolbar, and thus should be
 * a non-focusable Window.
 *
 * Setting the focusability state on a visible {@code Window}
 * can have a delayed effect on some platforms — the actual
 * change may happen only when the {@code Window} becomes
 * hidden and then visible again. To ensure consistent behavior
 * across platforms, set the {@code Window}'s focusable state
 * when the {@code Window} is invisible and then show it.
 *
 * @param focusableWindowState whether this Window can be the focused
 * Window
 * @see #isFocusableWindow
 * @see #getFocusableWindowState
 * @see #isShowing
 * @see Component#setFocusable
 * @since 1.4
 */
 public void setFocusableWindowState(boolean focusableWindowState) {
 boolean oldFocusableWindowState;
 synchronized (this) {
 oldFocusableWindowState = this.focusableWindowState;
 this.focusableWindowState = focusableWindowState;
 }
 WindowPeer peer = (WindowPeer)this.peer;
 if (peer != null) {
 peer.updateFocusableWindowState();
 }
 firePropertyChange("focusableWindowState", oldFocusableWindowState,
 focusableWindowState);
 if (oldFocusableWindowState && !focusableWindowState && isFocused()) {
 for (Window owner = getOwner();
 owner != null;
 owner = owner.getOwner())
 {
 Component toFocus =
 KeyboardFocusManager.getMostRecentFocusOwner(owner);
 if (toFocus != null && toFocus.requestFocus(false, FocusEvent.Cause.ACTIVATION)) {
 return;
 }
 }
 KeyboardFocusManager.getCurrentKeyboardFocusManager().
 clearGlobalFocusOwnerPriv();
 }
 }

 /**
 * Sets whether this window should receive focus on
 * subsequently being shown (with a call to {@link #setVisible setVisible(true)}),
 * or being moved to the front (with a call to {@link #toFront}).
 * 
 * Note that {@link #setVisible setVisible(true)} may be called indirectly
 * (e.g. when showing an owner of the window makes the window to be shown).
 * {@link #toFront} may also be called indirectly (e.g. when
 * {@link #setVisible setVisible(true)} is called on already visible window).
 * In all such cases this property takes effect as well.
 * 
 * The value of the property is not inherited by owned windows.
 *
 * @param autoRequestFocus whether this window should be focused on
 * subsequently being shown or being moved to the front
 * @see #isAutoRequestFocus
 * @see #isFocusableWindow
 * @see #setVisible
 * @see #toFront
 * @since 1.7
 */
 public void setAutoRequestFocus(boolean autoRequestFocus) {
 this.autoRequestFocus = autoRequestFocus;
 }

 /**
 * Returns whether this window should receive focus on subsequently being shown
 * (with a call to {@link #setVisible setVisible(true)}), or being moved to the front
 * (with a call to {@link #toFront}).
 * 
 * By default, the window has {@code autoRequestFocus} value of {@code true}.
 *
 * @return {@code autoRequestFocus} value
 * @see #setAutoRequestFocus
 * @since 1.7
 */
 public boolean isAutoRequestFocus() {
 return autoRequestFocus;
 }

 /**
 * Adds a PropertyChangeListener to the listener list. The listener is
 * registered for all bound properties of this class, including the
 * following:
 * <ul>
 * <li>this Window's font ("font")</li>
 * <li>this Window's background color ("background")</li>
 * <li>this Window's foreground color ("foreground")</li>
 * <li>this Window's focusability ("focusable")</li>
 * <li>this Window's focus traversal keys enabled state
 * ("focusTraversalKeysEnabled")</li>
 * <li>this Window's Set of FORWARD_TRAVERSAL_KEYS
 * ("forwardFocusTraversalKeys")</li>
 * <li>this Window's Set of BACKWARD_TRAVERSAL_KEYS
 * ("backwardFocusTraversalKeys")</li>
 * <li>this Window's Set of UP_CYCLE_TRAVERSAL_KEYS
 * ("upCycleFocusTraversalKeys")</li>
 * <li>this Window's Set of DOWN_CYCLE_TRAVERSAL_KEYS
 * ("downCycleFocusTraversalKeys")</li>
 * <li>this Window's focus traversal policy ("focusTraversalPolicy")
 * </li>
 * <li>this Window's focusable Window state ("focusableWindowState")
 * </li>
 * <li>this Window's always-on-top state("alwaysOnTop")</li>
 * </ul>
 * Note that if this Window is inheriting a bound property, then no
 * event will be fired in response to a change in the inherited property.
 * 
 * If listener is null, no exception is thrown and no action is performed.
 *
 * @param listener the PropertyChangeListener to be added
 *
 * @see Component#removePropertyChangeListener
 * @see #addPropertyChangeListener(java.lang.String,java.beans.PropertyChangeListener)
 */
 public void addPropertyChangeListener(PropertyChangeListener listener) {
 super.addPropertyChangeListener(listener);
 }

 /**
 * Adds a PropertyChangeListener to the listener list for a specific
 * property. The specified property may be user-defined, or one of the
 * following:
 * <ul>
 * <li>this Window's font ("font")</li>
 * <li>this Window's background color ("background")</li>
 * <li>this Window's foreground color ("foreground")</li>
 * <li>this Window's focusability ("focusable")</li>
 * <li>this Window's focus traversal keys enabled state
 * ("focusTraversalKeysEnabled")</li>
 * <li>this Window's Set of FORWARD_TRAVERSAL_KEYS
 * ("forwardFocusTraversalKeys")</li>
 * <li>this Window's Set of BACKWARD_TRAVERSAL_KEYS
 * ("backwardFocusTraversalKeys")</li>
 * <li>this Window's Set of UP_CYCLE_TRAVERSAL_KEYS
 * ("upCycleFocusTraversalKeys")</li>
 * <li>this Window's Set of DOWN_CYCLE_TRAVERSAL_KEYS
 * ("downCycleFocusTraversalKeys")</li>
 * <li>this Window's focus traversal policy ("focusTraversalPolicy")
 * </li>
 * <li>this Window's focusable Window state ("focusableWindowState")
 * </li>
 * <li>this Window's always-on-top state("alwaysOnTop")</li>
 * </ul>
 * Note that if this Window is inheriting a bound property, then no
 * event will be fired in response to a change in the inherited property.
 * 
 * If listener is null, no exception is thrown and no action is performed.
 *
 * @param propertyName one of the property names listed above
 * @param listener the PropertyChangeListener to be added
 *
 * @see #addPropertyChangeListener(java.beans.PropertyChangeListener)
 * @see Component#removePropertyChangeListener
 */
 public void addPropertyChangeListener(String propertyName,
 PropertyChangeListener listener) {
 super.addPropertyChangeListener(propertyName, listener);
 }

 /**
 * Indicates if this container is a validate root.
 * 
 * {@code Window} objects are the validate roots, and, therefore, they
 * override this method to return {@code true}.
 *
 * @return {@code true}
 * @since 1.7
 * @see java.awt.Container#isValidateRoot
 */
 @Override
 public boolean isValidateRoot() {
 return true;
 }

 /**
 * Dispatches an event to this window or one of its sub components.
 * @param e the event
 */
 void dispatchEventImpl(AWTEvent e) {
 if (e.getID() == ComponentEvent.COMPONENT_RESIZED) {
 invalidate();
 validate();
 }
 super.dispatchEventImpl(e);
 }

 /**
 * @deprecated As of JDK version 1.1
 * replaced by {@code dispatchEvent(AWTEvent)}.
 */
 @Deprecated
 public boolean postEvent(Event e) {
 if (handleEvent(e)) {
 e.consume();
 return true;
 }
 return false;
 }

 /**
 * Checks if this Window is showing on screen.
 * @see Component#setVisible
 */
 public boolean isShowing() {
 return visible;
 }

 boolean isDisposing() {
 return disposing;
 }

 /**
 * @deprecated As of J2SE 1.4, replaced by
 * {@link Component#applyComponentOrientation Component.applyComponentOrientation}.
 * @param rb the resource bundle
 */
 @Deprecated
 public void applyResourceBundle(ResourceBundle rb) {
 applyComponentOrientation(ComponentOrientation.getOrientation(rb));
 }

 /**
 * @deprecated As of J2SE 1.4, replaced by
 * {@link Component#applyComponentOrientation Component.applyComponentOrientation}.
 * @param rbName the resource name
 */
 @Deprecated
 public void applyResourceBundle(String rbName) {
 // Use the unnamed module from the TCCL or system class loader.
 ClassLoader cl = Thread.currentThread().getContextClassLoader();
 if (cl == null) {
 cl = ClassLoader.getSystemClassLoader();
 }
 applyResourceBundle(ResourceBundle.getBundle(rbName, cl.getUnnamedModule()));
 }

 /*
 * Support for tracking all windows owned by this window
 */
 void addOwnedWindow(WeakReference<Window> weakWindow) {
 if (weakWindow != null) {
 synchronized(ownedWindowList) {
 // this if statement should really be an assert, but we don't
 // have asserts...
 if (!ownedWindowList.contains(weakWindow)) {
 ownedWindowList.addElement(weakWindow);
 }
 }
 }
 }

 void removeOwnedWindow(WeakReference<Window> weakWindow) {
 if (weakWindow != null) {
 // synchronized block not required since removeElement is
 // already synchronized
 ownedWindowList.removeElement(weakWindow);
 }
 }

 void connectOwnedWindow(Window child) {
 child.parent = this;
 addOwnedWindow(child.weakThis);
 child.disposerRecord.updateOwner();
 }

 private void addToWindowList() {
 synchronized (Window.class) {
 @SuppressWarnings("unchecked")
 Vector<WeakReference<Window>> windowList = (Vector<WeakReference<Window>>)appContext.get(Window.class);
 if (windowList == null) {
 windowList = new Vector<WeakReference<Window>>();
 appContext.put(Window.class, windowList);
 }
 windowList.add(weakThis);
 }
 }

 private static void removeFromWindowList(AppContext context, WeakReference<Window> weakThis) {
 synchronized (Window.class) {
 @SuppressWarnings("unchecked")
 Vector<WeakReference<Window>> windowList = (Vector<WeakReference<Window>>)context.get(Window.class);
 if (windowList != null) {
 windowList.remove(weakThis);
 }
 }
 }

 private void removeFromWindowList() {
 removeFromWindowList(appContext, weakThis);
 }

 /**
 * Window type.
 *
 * Synchronization: ObjectLock
 */
 private Type type = Type.NORMAL;

 /**
 * Sets the type of the window.
 *
 * This method can only be called while the window is not displayable.
 *
 * @param type the window type
 * @throws IllegalComponentStateException if the window
 * is displayable.
 * @throws IllegalArgumentException if the type is {@code null}
 * @see Component#isDisplayable
 * @see #getType
 * @since 1.7
 */
 public void setType(Type type) {
 if (type == null) {
 throw new IllegalArgumentException("type should not be null.");
 }
 synchronized (getTreeLock()) {
 if (isDisplayable()) {
 throw new IllegalComponentStateException(
 "The window is displayable.");
 }
 synchronized (getObjectLock()) {
 this.type = type;
 }
 }
 }

 /**
 * Returns the type of the window.
 *
 * @return the type of the window
 * @see #setType
 * @since 1.7
 */
 public Type getType() {
 synchronized (getObjectLock()) {
 return type;
 }
 }

 /**
 * The window serialized data version.
 *
 * @serial
 */
 private int windowSerializedDataVersion = 2;

 /**
 * Writes default serializable fields to stream. Writes
 * a list of serializable {@code WindowListener}s and
 * {@code WindowFocusListener}s as optional data.
 * Writes a list of child windows as optional data.
 * Writes a list of icon images as optional data
 *
 * @param s the {@code ObjectOutputStream} to write
 * @throws IOException if an I/O error occurs
 * @serialData {@code null} terminated sequence of
 * 0 or more pairs; the pair consists of a {@code String}
 * and {@code Object}; the {@code String}
 * indicates the type of object and is one of the following:
 * {@code windowListenerK} indicating a
 * {@code WindowListener} object;
 * {@code windowFocusWindowK} indicating a
 * {@code WindowFocusListener} object;
 * {@code ownedWindowK} indicating a child
 * {@code Window} object
 *
 * @see AWTEventMulticaster#save(java.io.ObjectOutputStream, java.lang.String, java.util.EventListener)
 * @see Component#windowListenerK
 * @see Component#windowFocusListenerK
 * @see Component#ownedWindowK
 * @see #readObject(ObjectInputStream)
 */
 @Serial
 private void writeObject(ObjectOutputStream s) throws IOException {
 synchronized (this) {
 // Update old focusMgr fields so that our object stream can be read
 // by previous releases
 focusMgr = new FocusManager();
 focusMgr.focusRoot = this;
 focusMgr.focusOwner = getMostRecentFocusOwner();

 s.defaultWriteObject();

 // Clear fields so that we don't keep extra references around
 focusMgr = null;

 AWTEventMulticaster.save(s, windowListenerK, windowListener);
 AWTEventMulticaster.save(s, windowFocusListenerK, windowFocusListener);
 AWTEventMulticaster.save(s, windowStateListenerK, windowStateListener);
 }

 s.writeObject(null);

 synchronized (ownedWindowList) {
 for (int i = 0; i < ownedWindowList.size(); i++) {
 Window child = ownedWindowList.elementAt(i).get();
 if (child != null) {
 s.writeObject(ownedWindowK);
 s.writeObject(child);
 }
 }
 }
 s.writeObject(null);

 //write icon array
 if (icons != null) {
 for (Image i : icons) {
 if (i instanceof Serializable) {
 s.writeObject(i);
 }
 }
 }
 s.writeObject(null);
 }

 //
 // Part of deserialization procedure to be called before
 // user's code.
 //
 private void initDeserializedWindow() {
 setWarningString();
 inputContextLock = new Object();

 // Deserialized Windows are not yet visible.
 visible = false;

 weakThis = new WeakReference<>(this);

 anchor = new Object();
 disposerRecord = new WindowDisposerRecord(appContext, this);
 sun.java2d.Disposer.addRecord(anchor, disposerRecord);

 addToWindowList();
 initGC(null);
 ownedWindowList = new Vector<>();
 }

 private void deserializeResources(ObjectInputStream s)
 throws ClassNotFoundException, IOException, HeadlessException {

 if (windowSerializedDataVersion < 2) {
 // Translate old-style focus tracking to new model. For 1.4 and
 // later releases, we'll rely on the Window's initial focusable
 // Component.
 if (focusMgr != null) {
 if (focusMgr.focusOwner != null) {
 KeyboardFocusManager.
 setMostRecentFocusOwner(this, focusMgr.focusOwner);
 }
 }

 // This field is non-transient and relies on default serialization.
 // However, the default value is insufficient, so we need to set
 // it explicitly for object data streams prior to 1.4.
 focusableWindowState = true;

 }

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

 if (windowListenerK == key) {
 addWindowListener((WindowListener)(s.readObject()));
 } else if (windowFocusListenerK == key) {
 addWindowFocusListener((WindowFocusListener)(s.readObject()));
 } else if (windowStateListenerK == key) {
 addWindowStateListener((WindowStateListener)(s.readObject()));
 } else // skip value for unrecognized key
 s.readObject();
 }

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

 if (ownedWindowK == key)
 connectOwnedWindow((Window) s.readObject());

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

 //read icons
 Object obj = s.readObject(); //Throws OptionalDataException
 //for pre1.6 objects.
 icons = new ArrayList<Image>(); //Frame.readObject() assumes
 //pre1.6 version if icons is null.
 while (obj != null) {
 if (obj instanceof Image) {
 icons.add((Image)obj);
 }
 obj = s.readObject();
 }
 }
 catch (OptionalDataException e) {
 // 1.1 serialized form
 // ownedWindowList will be updated by Frame.readObject
 }

 }

 /**
 * Reads the {@code ObjectInputStream} and an optional
 * list of listeners to receive various events fired by
 * the component; also reads a list of
 * (possibly {@code null}) child windows.
 * Unrecognized keys or values will be ignored.
 *
 * @param s the {@code ObjectInputStream} to read
 * @throws ClassNotFoundException if the class of a serialized object could
 * not be found
 * @throws IOException if an I/O error occurs
 * @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()}
 * returns {@code true}
 * @see java.awt.GraphicsEnvironment#isHeadless
 * @see #writeObject
 */
 @Serial
 private void readObject(ObjectInputStream s)
 throws ClassNotFoundException, IOException, HeadlessException
 {
 GraphicsEnvironment.checkHeadless();
 initDeserializedWindow();
 ObjectInputStream.GetField f = s.readFields();

 syncLWRequests = f.get("syncLWRequests", systemSyncLWRequests);
 state = f.get("state", 0);
 focusableWindowState = f.get("focusableWindowState", true);
 windowSerializedDataVersion = f.get("windowSerializedDataVersion", 1);
 locationByPlatform = f.get("locationByPlatform", locationByPlatformProp);
 // Note: 1.4 (or later) doesn't use focusMgr
 focusMgr = (FocusManager)f.get("focusMgr", null);
 Dialog.ModalExclusionType et = (Dialog.ModalExclusionType)
 f.get("modalExclusionType", Dialog.ModalExclusionType.NO_EXCLUDE);
 setModalExclusionType(et); // since 6.0
 boolean aot = f.get("alwaysOnTop", false);
 if(aot) {
 setAlwaysOnTop(aot); // since 1.5; subject to permission check
 }
 shape = (Shape)f.get("shape", null);
 opacity = (Float)f.get("opacity", 1.0f);

 this.securityWarningWidth = 0;
 this.securityWarningHeight = 0;

 deserializeResources(s);
 }

 /*
 * --- Accessibility Support ---
 *
 */

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

 /**
 * This class implements accessibility support for the
 * {@code Window} class. It provides an implementation of the
 * Java Accessibility API appropriate to window user-interface elements.
 * @since 1.3
 */
 protected class AccessibleAWTWindow extends AccessibleAWTContainer
 {
 /**
 * Use serialVersionUID from JDK 1.3 for interoperability.
 */
 @Serial
 private static final long serialVersionUID = 4215068635060671780L;

 /**
 * Constructs an {@code AccessibleAWTWindow}.
 */
 protected AccessibleAWTWindow() {}

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

 /**
 * Get the state of this object.
 *
 * @return an instance of AccessibleStateSet containing the current
 * state set of the object
 * @see javax.accessibility.AccessibleState
 */
 public AccessibleStateSet getAccessibleStateSet() {
 AccessibleStateSet states = super.getAccessibleStateSet();
 if (getFocusOwner() != null) {
 states.add(AccessibleState.ACTIVE);
 }
 return states;
 }

 } // inner class AccessibleAWTWindow

 @Override
 void setGraphicsConfiguration(GraphicsConfiguration gc) {
 if (gc == null) {
 gc = GraphicsEnvironment.
 getLocalGraphicsEnvironment().
 getDefaultScreenDevice().
 getDefaultConfiguration();
 }
 synchronized (getTreeLock()) {
 super.setGraphicsConfiguration(gc);
 if (log.isLoggable(PlatformLogger.Level.FINER)) {
 log.finer("+ Window.setGraphicsConfiguration(): new GC is \n+ " + getGraphicsConfiguration_NoClientCode() + "\n+ this is " + this);
 }
 }
 }

 /**
 * Sets the location of the window relative to the specified
 * component according to the following scenarios.
 * 
 * The target screen mentioned below is a screen to which
 * the window should be placed after the setLocationRelativeTo
 * method is called.
 * <ul>
 * <li>If the component is {@code null}, or the {@code
 * GraphicsConfiguration} associated with this component is
 * {@code null}, the window is placed in the center of the
 * screen. The center point can be obtained with the {@link
 * GraphicsEnvironment#getCenterPoint
 * GraphicsEnvironment.getCenterPoint} method.
 * <li>If the component is not {@code null}, but it is not
 * currently showing, the window is placed in the center of
 * the target screen defined by the {@code
 * GraphicsConfiguration} associated with this component.
 * <li>If the component is not {@code null} and is shown on
 * the screen, then the window is located in such a way that
 * the center of the window coincides with the center of the
 * component.
 * </ul>
 * 
 * If the screens configuration does not allow the window to
 * be moved from one screen to another, then the window is
 * only placed at the location determined according to the
 * above conditions and its {@code GraphicsConfiguration} is
 * not changed.
 * 
 * Note: If the lower edge of the window is out of the screen,
 * then the window is placed to the side of the {@code Component}
 * that is closest to the center of the screen. So if the
 * component is on the right part of the screen, the window
 * is placed to its left, and vice versa.
 * 
 * If after the window location has been calculated, the upper,
 * left, or right edge of the window is out of the screen,
 * then the window is located in such a way that the upper,
 * left, or right edge of the window coincides with the
 * corresponding edge of the screen. If both left and right
 * edges of the window are out of the screen, the window is
 * placed at the left side of the screen. The similar placement
 * will occur if both top and bottom edges are out of the screen.
 * In that case, the window is placed at the top side of the screen.
 * 
 * The method changes the geometry-related data. Therefore,
 * the native windowing system may ignore such requests, or it may modify
 * the requested data, so that the {@code Window} object is placed and sized
 * in a way that corresponds closely to the desktop settings.
 *
 * @param c the component in relation to which the window's location
 * is determined
 * @see java.awt.GraphicsEnvironment#getCenterPoint
 * @since 1.4
 */
 public void setLocationRelativeTo(Component c) {
 // target location
 int dx = 0, dy = 0;
 // target GC
 GraphicsConfiguration gc = getGraphicsConfiguration_NoClientCode();
 Rectangle gcBounds = gc.getBounds();

 Dimension windowSize = getSize();

 // search a top-level of c
 Window componentWindow = SunToolkit.getContainingWindow(c);
 if ((c == null) || (componentWindow == null)) {
 GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
 gc = ge.getDefaultScreenDevice().getDefaultConfiguration();
 gcBounds = gc.getBounds();
 Point centerPoint = ge.getCenterPoint();
 dx = centerPoint.x - windowSize.width / 2;
 dy = centerPoint.y - windowSize.height / 2;
 } else if (!c.isShowing()) {
 gc = componentWindow.getGraphicsConfiguration();
 gcBounds = gc.getBounds();
 dx = gcBounds.x + (gcBounds.width - windowSize.width) / 2;
 dy = gcBounds.y + (gcBounds.height - windowSize.height) / 2;
 } else {
 gc = componentWindow.getGraphicsConfiguration();
 gcBounds = gc.getBounds();
 Dimension compSize = c.getSize();
 Point compLocation = c.getLocationOnScreen();
 dx = compLocation.x + ((compSize.width - windowSize.width) / 2);
 dy = compLocation.y + ((compSize.height - windowSize.height) / 2);

 // Adjust for bottom edge being offscreen
 if (dy + windowSize.height > gcBounds.y + gcBounds.height) {
 dy = gcBounds.y + gcBounds.height - windowSize.height;
 if (compLocation.x - gcBounds.x + compSize.width / 2 < gcBounds.width / 2) {
 dx = compLocation.x + compSize.width;
 } else {
 dx = compLocation.x - windowSize.width;
 }
 }
 }

 // Avoid being placed off the edge of the screen:
 // bottom
 if (dy + windowSize.height > gcBounds.y + gcBounds.height) {
 dy = gcBounds.y + gcBounds.height - windowSize.height;
 }
 // top
 if (dy < gcBounds.y) {
 dy = gcBounds.y;
 }
 // right
 if (dx + windowSize.width > gcBounds.x + gcBounds.width) {
 dx = gcBounds.x + gcBounds.width - windowSize.width;
 }
 // left
 if (dx < gcBounds.x) {
 dx = gcBounds.x;
 }

 setLocation(dx, dy);
 }

 /**
 * Overridden from Component. Top-level Windows should not propagate a
 * MouseWheelEvent beyond themselves into their owning Windows.
 */
 void deliverMouseWheelToAncestor(MouseWheelEvent e) {}

 /**
 * Overridden from Component. Top-level Windows don't dispatch to ancestors
 */
 boolean dispatchMouseWheelToAncestor(MouseWheelEvent e) {return false;}

 /**
 * Creates a new strategy for multi-buffering on this component.
 * Multi-buffering is useful for rendering performance. This method
 * attempts to create the best strategy available with the number of
 * buffers supplied. It will always create a {@code BufferStrategy}
 * with that number of buffers.
 * A page-flipping strategy is attempted first, then a blitting strategy
 * using accelerated buffers. Finally, an unaccelerated blitting
 * strategy is used.
 * 
 * Each time this method is called,
 * the existing buffer strategy for this component is discarded.
 * @param numBuffers number of buffers to create
 * @throws IllegalArgumentException if numBuffers is less than 1.
 * @throws IllegalStateException if the component is not displayable
 * @see #isDisplayable
 * @see #getBufferStrategy
 * @since 1.4
 */
 public void createBufferStrategy(int numBuffers) {
 super.createBufferStrategy(numBuffers);
 }

 /**
 * Creates a new strategy for multi-buffering on this component with the
 * required buffer capabilities. This is useful, for example, if only
 * accelerated memory or page flipping is desired (as specified by the
 * buffer capabilities).
 * 
 * Each time this method
 * is called, the existing buffer strategy for this component is discarded.
 * @param numBuffers number of buffers to create, including the front buffer
 * @param caps the required capabilities for creating the buffer strategy;
 * cannot be {@code null}
 * @throws AWTException if the capabilities supplied could not be
 * supported or met; this may happen, for example, if there is not enough
 * accelerated memory currently available, or if page flipping is specified
 * but not possible.
 * @throws IllegalArgumentException if numBuffers is less than 1, or if
 * caps is {@code null}
 * @see #getBufferStrategy
 * @since 1.4
 */
 public void createBufferStrategy(int numBuffers,
 BufferCapabilities caps) throws AWTException {
 super.createBufferStrategy(numBuffers, caps);
 }

 /**
 * Returns the {@code BufferStrategy} used by this component. This
 * method will return null if a {@code BufferStrategy} has not yet
 * been created or has been disposed.
 *
 * @return the buffer strategy used by this component
 * @see #createBufferStrategy
 * @since 1.4
 */
 public BufferStrategy getBufferStrategy() {
 return super.getBufferStrategy();
 }

 Component getTemporaryLostComponent() {
 return temporaryLostComponent;
 }
 Component setTemporaryLostComponent(Component component) {
 Component previousComp = temporaryLostComponent;
 // Check that "component" is an acceptable focus owner and don't store it otherwise
 // - or later we will have problems with opposite while handling WINDOW_GAINED_FOCUS
 if (component == null || component.canBeFocusOwner()) {
 temporaryLostComponent = component;
 } else {
 temporaryLostComponent = null;
 }
 return previousComp;
 }

 /**
 * Checks whether this window can contain focus owner.
 * Verifies that it is focusable and as container it can container focus owner.
 * @since 1.5
 */
 boolean canContainFocusOwner(Component focusOwnerCandidate) {
 return super.canContainFocusOwner(focusOwnerCandidate) && isFocusableWindow();
 }

 /**
 * {@code true} if this Window should appear at the default location,
 * {@code false} if at the current location.
 */
 private volatile boolean locationByPlatform = locationByPlatformProp;

 /**
 * Sets whether this Window should appear at the default location for the
 * native windowing system or at the current location (returned by
 * {@code getLocation}) the next time the Window is made visible.
 * This behavior resembles a native window shown without programmatically
 * setting its location. Most windowing systems cascade windows if their
 * locations are not explicitly set. The actual location is determined once the
 * window is shown on the screen.
 * 
 * This behavior can also be enabled by setting the System Property
 * "java.awt.Window.locationByPlatform" to "true", though calls to this method
 * take precedence.
 * 
 * Calls to {@code setVisible}, {@code setLocation} and
 * {@code setBounds} after calling {@code setLocationByPlatform} clear
 * this property of the Window.
 * 
 * For example, after the following code is executed:
 * <pre>
 * setLocationByPlatform(true);
 * setVisible(true);
 * boolean flag = isLocationByPlatform();
 * </pre>
 * The window will be shown at platform's default location and
 * {@code flag} will be {@code false}.
 * 
 * In the following sample:
 * <pre>
 * setLocationByPlatform(true);
 * setLocation(10, 10);
 * boolean flag = isLocationByPlatform();
 * setVisible(true);
 * </pre>
 * The window will be shown at (10, 10) and {@code flag} will be
 * {@code false}.
 *
 * @param locationByPlatform {@code true} if this Window should appear
 * at the default location, {@code false} if at the current location
 * @throws IllegalComponentStateException if the window
 * is showing on screen and locationByPlatform is {@code true}.
 * @see #setLocation
 * @see #isShowing
 * see setVisible
 * @see #isLocationByPlatform
 * @see java.lang.System#getProperty(String)
 * @since 1.5
 */
 public void setLocationByPlatform(boolean locationByPlatform) {
 synchronized (getTreeLock()) {
 if (locationByPlatform && isShowing()) {
 throw new IllegalComponentStateException *propertyisignored
 }
 this.locationByPlatform = locationByPlatform;
 }
 }

 /**
 @ true if this will at the location
 * for the native windowing system the next time this Window is made visible.
 * This method always returns {@code false} if the Window is showing on the
 * screen.
 *
 * @return whether this Window will appear at the default location
 @see #etLocationByPlatform
 * @see #isShowing
 * @since 1.5
 */
 public boolean isLocationByPlatform() {
 return locationByPlatform;
 }

 /**
 /**
 * 
* The {@code width} or {@code height} values
 * are automatically enlarged if either is less than
 * the minimum size as specified by previous call to
 * {@code setMinimumSize anothermenuofwhichthis menuis submenu.

 * The method changes the geometry-related data. Therefore,
 * the native windowing system may ignore such requests, or it may modify
 * the requested data, so that the {@code Window} object is placed and sized
 * in a way that corresponds closely to the desktop settings.
 java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6
 see#etBounds
 * @see #setLocation(int, int)
 * @see #setLocation(Point)
 @ setSize(, )
 * @see #setSize(Dimension)
 @see setMinimumSize
 * @see #setLocationByPlatform
 * @see #isLocationByPlatform
 * @since 1.6
 */
 public void setBounds(
 synchronized (getTreeLock()) {
 if ( }
 getBoundsOp() == ComponentPeer.SET_BOUNDS)
 {
 replaced by{codegetItemCount)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
 }
 super.setBounds(x, y, width, height);
 }
 }

 /**
 * {@inheritDoc}
 * 
 * The {@code r.width} or {@code r.height} values
 * will be automatically enlarged if either is less than
 * the minimum size as specified by previous call to
 * {@code setMinimumSize}.
 * 
 * The method changes the geometry-related
 *java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
 * the requested data, so that the {@code Window} object is placed and
 * in a way that corresponds closely to the desktop settings.
 *
 *@ #etBounds
 * @see #setLocation(int, int)
 * add(menuitem)java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
 * @see #setSize(int, int)
 * @see #setSize(Dimension)
 * @see #setMinimumSize
 * @seeshould java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
 * @see #isLocationByPlatform
 * @since 1.6
 */
 public void setBounds(Rectangle * seejava.insertSeparator)
 . r,r.width.eight;
 }

 /**
 * Determines whether this component will be displayed on the screen.
 * @return {@code true} if the component and all of its ancestors
 * until a toplevel window are visible, {@code false} otherwise
 */
 booleanalready order vector

 // We're overriding isRecursivelyVisible to implement this policy.
 return visible;
 }

 // ******************** SHAPES & TRANSPARENCY CODE ********************

 /**
 * Returns the opacity of the window.
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6
 * @return the opacity of
 *
 * @see Window#setOpacity(float)
* .WindowTranslucency
 *
 * @since 1.7
 */
 public whilee(
 return opacity;
 }

 /**
 * Sets the opacity of the window.
*>
 * The opacity value is in the range [0..1]. Note that setting the opacity
 * level of 0 may or may not disable the mouse event handling on this
 * window. This is a platform-dependent behavior.
 * 
 * The following conditions must be met in order to set the opacity value
 * less than {@code 1.0f}:
 * <ul>
 * <li>The {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}
 * translucency must be supported by
Thewindow be undecorated( {linkFrame#setUndecorated}
 * and {@link Dialog#setUndecorated})
 * <li>The window must not be in full-screen mode (see {@link
 * GraphicsDevice#setFullScreenWindow(Window)})
 * </ul>
 * 
 * If the requested opacity value is less than {@code 1.0f}, and any of the
 * above conditionsjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 @ IllegalComponentStateExceptionwillbethrown.
 * 
 * The translucency levels of individual pixels may also be effected by
 * alpha * Java AccessibilityAPI appropriate user-nterface elements.
 * current shape of this window (see {@link #setShape(Shape)}).
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6
 * @param opacity the opacity level to set to the window
 *
 * */
 * [0..1]
 * @throws IllegalComponentStateException if the window is decorated and
 * the opacity is less than {@code 1.0f}
 * @throws IllegalComponentStateException if the window is in full screen
 * mode, and the opacity is less than {@code 1.0f}
 * @throws UnsupportedOperationException if the {@code
 * GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}
 * translucency is not supported and the opacity is less than
 * {@code 1.0f}
 *
 * @see Window#getOpacity
 * @see Window#setBackground(Color)
 * @see Window#setShape(Shape)
 * @see Frame#isUndecorated
 * @see Dialog#isUndecorated
 * @see GraphicsDevice.WindowTranslucency
 * @see GraphicsDevice#isWindowTranslucencySupported(GraphicsDevice.WindowTranslucency)
 *
 * @since 1.7
 */
 @SuppressWarnings("deprecation")
 public void setOpacity(float opacity) {
 synchronized (getTreeLock()) {
 if (opacity < 0.0f || opacity > 1.0f) {
 throw new IllegalArgumentException(
 "The value of opacity should be in the range [0.0f .. 1.0f].");
 }
 if (opacity < 1.0f) {
 GraphicsConfiguration gc = getGraphicsConfiguration();
 GraphicsDevice gd = gc.getDevice();
 if (gc.getDevice().getFullScreenWindow() == this) {
 throw new IllegalComponentStateException(
 "Setting opacity for full-screen window is not supported.");
 }
 if (!gd.isWindowTranslucencySupported(
 GraphicsDevice.WindowTranslucency.TRANSLUCENT))
 {
 throw new UnsupportedOperationException(
 "TRANSLUCENT translucency is not supported.");
 }
 }
 this.opacity = opacity;
 WindowPeer peer = (WindowPeer) this.peer;
 if (peer != null) {
 peer.setOpacity(opacity);
 }
 }
 }

 /**
 * Returns the shape of the window.
 *
 * The value returned by this method may not be the same as
 * previously set with {@code setShape(shape)}, but it is guaranteed
 * to represent the same shape.
 *
 * @return the shape of the window or {@code null} if no
 * shape is specified for the window
 *
 * @see Window#setShape(Shape)
 * @see GraphicsDevice.WindowTranslucency
 *
 * @since 1.7
 */
 public Shape getShape() {
 synchronized (getTreeLock()) {
 return shape == null ? null : new Path2D.Float(shape);
 }
 }

 /**
 * Sets the shape of the window.
 * 
 * Setting a shape cuts off some parts of the window. Only the parts that
 * belong to the given {@link Shape} remain visible and clickable. If
 * the shape argument is {@code null}, this method restores the default
 * shape, making the window rectangular on most platforms.
 * 
 * The following conditions must be met to set a non-null shape:
 * <ul>
 * <li>The {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSPARENT
 * PERPIXEL_TRANSPARENT} translucency must be supported by the
 * underlying system
 * <li>The window must be undecorated (see {@link Frame#setUndecorated}
 * and {@link Dialog#setUndecorated})
 * <li>The window must not be in full-screen mode (see {@link
 * GraphicsDevice#setFullScreenWindow(Window)})
 * </ul>
 * 
 * If the requested shape is not {@code null}, and any of the above
 * conditions are not met, the shape of this window will not change,
 * and either the {@code UnsupportedOperationException} or {@code
 * IllegalComponentStateException} will be thrown.
 * 
 * The translucency levels of individual pixels may also be effected by the
 * alpha component of their color (see {@link Window#setBackground(Color)}) and the
 * opacity value (see {@link #setOpacity(float)}). See {@link
 * GraphicsDevice.WindowTranslucency} for more details.
 *
 * @param shape the shape to set to the window
 *
 * @throws IllegalComponentStateException if the shape is not {@code
 * null} and the window is decorated
 * @throws IllegalComponentStateException if the shape is not {@code
 * null} and the window is in full-screen mode
 * @throws UnsupportedOperationException if the shape is not {@code
 * null} and {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSPARENT
 * PERPIXEL_TRANSPARENT} translucency is not supported
 *
 * @see Window#getShape()
 * @see Window#setBackground(Color)
 * @see Window#setOpacity(float)
 * @see Frame#isUndecorated
 * @see Dialog#isUndecorated
 * @see GraphicsDevice.WindowTranslucency
 * @see GraphicsDevice#isWindowTranslucencySupported(GraphicsDevice.WindowTranslucency)
 *
 * @since 1.7
 */
 public void setShape(Shape shape) {
 synchronized (getTreeLock()) {
 if (shape != null) {
 GraphicsConfiguration gc = getGraphicsConfiguration();
 GraphicsDevice gd = gc.getDevice();
 if (gc.getDevice().getFullScreenWindow() == this) {
 throw new IllegalComponentStateException(
 "Setting shape for full-screen window is not supported.");
 }
 if (!gd.isWindowTranslucencySupported(
 GraphicsDevice.WindowTranslucency.PERPIXEL_TRANSPARENT))
 {
 throw new UnsupportedOperationException(
 "PERPIXEL_TRANSPARENT translucency is not supported.");
 }
 }
 this.shape = (shape == null) ? null : new Path2D.Float(shape);
 WindowPeer peer = (WindowPeer) this.peer;
 if (peer != null) {
 peer.applyShape(shape == null ? null : Region.getInstance(shape, null));
 }
 }
 }

 /**
 * Gets the background color of this window.
 * 
 * Note that the alpha component of the returned color indicates whether
 * the window is in the non-opaque (per-pixel translucent) mode.
 *
 * @return this component's background color
 *
 * @see Window#setBackground(Color)
 * @see Window#isOpaque
 * @see GraphicsDevice.WindowTranslucency
 */
 @Override
 public Color getBackground() {
 return super.getBackground();
 }

 /**
 * Sets the background color of this window.
 * 
 * If the windowing system supports the {@link
 * GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}
 * translucency, the alpha component of the given background color
 * may effect the mode of operation for this window: it indicates whether
 * this window must be opaque (alpha equals {@code 1.0f}) or per-pixel translucent
 * (alpha is less than {@code 1.0f}). If the given background color is
 * {@code null}, the window is considered completely opaque.
 * 
 * All the following conditions must be met to enable the per-pixel
 * transparency mode for this window:
 * <ul>
 * <li>The {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
 * PERPIXEL_TRANSLUCENT} translucency must be supported by the graphics
 * device where this window is located
 * <li>The window must be undecorated (see {@link Frame#setUndecorated}
 * and {@link Dialog#setUndecorated})
 * <li>The window must not be in full-screen mode (see {@link
 * GraphicsDevice#setFullScreenWindow(Window)})
 * </ul>
 * 
 * If the alpha component of the requested background color is less than
 * {@code 1.0f}, and any of the above conditions are not met, the background
 * color of this window will not change, the alpha component of the given
 * background color will not affect the mode of operation for this window,
 * and either the {@code UnsupportedOperationException} or {@code
 * IllegalComponentStateException} will be thrown.
 * 
 * When the window is per-pixel translucent, the drawing sub-system
 * respects the alpha value of each individual pixel. If a pixel gets
 * painted with the alpha color component equal to zero, it becomes
 * visually transparent. If the alpha of the pixel is equal to 1.0f, the
 * pixel is fully opaque. Interim values of the alpha color component make
 * the pixel semi-transparent. In this mode, the background of the window
 * gets painted with the alpha value of the given background color. If the
 * alpha value of the argument of this method is equal to {@code 0}, the
 * background is not painted at all.
 * 
 * The actual level of translucency of a given pixel also depends on window
 * opacity (see {@link #setOpacity(float)}), as well as the current shape of
 * this window (see {@link #setShape(Shape)}).
 * 
 * Note that painting a pixel with the alpha value of {@code 0} may or may
 * not disable the mouse event handling on this pixel. This is a
 * platform-dependent behavior. To make sure the mouse events do not get
 * dispatched to a particular pixel, the pixel must be excluded from the
 * shape of the window.
 * 
 * Enabling the per-pixel translucency mode may change the graphics
 * configuration of this window due to the native platform requirements.
 *
 * @param bgColor the color to become this window's background color.
 *
 * @throws IllegalComponentStateException if the alpha value of the given
 * background color is less than {@code 1.0f} and the window is decorated
 * @throws IllegalComponentStateException if the alpha value of the given
 * background color is less than {@code 1.0f} and the window is in
 * full-screen mode
 * @throws UnsupportedOperationException if the alpha value of the given
 * background color is less than {@code 1.0f} and {@link
 * GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
 * PERPIXEL_TRANSLUCENT} translucency is not supported
 *
 * @see Window#getBackground
 * @see Window#isOpaque
 * @see Window#setOpacity(float)
 * @see Window#setShape(Shape)
 * @see Frame#isUndecorated
 * @see Dialog#isUndecorated
 * @see GraphicsDevice.WindowTranslucency
 * @see GraphicsDevice#isWindowTranslucencySupported(GraphicsDevice.WindowTranslucency)
 * @see GraphicsConfiguration#isTranslucencyCapable()
 */
 @Override
 public void setBackground(Color bgColor) {
 Color oldBg = getBackground();
 super.setBackground(bgColor);
 if (oldBg != null && oldBg.equals(bgColor)) {
 return;
 }
 int oldAlpha = oldBg != null ? oldBg.getAlpha() : 255;
 int alpha = bgColor != null ? bgColor.getAlpha() : 255;
 if ((oldAlpha == 255) && (alpha < 255)) { // non-opaque window
 GraphicsConfiguration gc = getGraphicsConfiguration();
 GraphicsDevice gd = gc.getDevice();
 if (gc.getDevice().getFullScreenWindow() == this) {
 throw new IllegalComponentStateException(
 "Making full-screen window non opaque is not supported.");
 }
 if (!gc.isTranslucencyCapable()) {
 GraphicsConfiguration capableGC = gd.getTranslucencyCapableGC();
 if (capableGC == null) {
 throw new UnsupportedOperationException(
 "PERPIXEL_TRANSLUCENT translucency is not supported");
 }
 setGraphicsConfiguration(capableGC);
 }
 setLayersOpaque(this, false);
 } else if ((oldAlpha < 255) && (alpha == 255)) {
 setLayersOpaque(this, true);
 }
 WindowPeer peer = (WindowPeer) this.peer;
 if (peer != null) {
 peer.setOpaque(alpha == 255);
 }
 }

 /**
 * Indicates if the window is currently opaque.
 * 
 * The method returns {@code false} if the background color of the window
 * is not {@code null} and the alpha component of the color is less than
 * {@code 1.0f}. The method returns {@code true} otherwise.
 *
 * @return {@code true} if the window is opaque, {@code false} otherwise
 *
 * @see Window#getBackground
 * @see Window#setBackground(Color)
 * @since 1.7
 */
 @Override
 public boolean isOpaque() {
 Color bg = getBackground();
 return bg != null ? bg.getAlpha() == 255 : true;
 }

 private void updateWindow() {
 synchronized (getTreeLock()) {
 WindowPeer peer = (WindowPeer) this.peer;
 if (peer != null) {
 peer.updateWindow();
 }
 }
 }

 /**
 * {@inheritDoc}
 *
 * @since 1.7
 */
 @Override
 public void paint(Graphics g) {
 if (!isOpaque()) {
 Graphics gg = g.create();
 try {
 if (gg instanceof Graphics2D) {
 gg.setColor(getBackground());
 ((Graphics2D)gg).setComposite(AlphaComposite.getInstance(AlphaComposite.SRC));
 gg.fillRect(0, 0, getWidth(), getHeight());
 }
 } finally {
 gg.dispose();
 }
 }
 super.paint(g);
 }

 private static void setLayersOpaque(Component component, boolean isOpaque) {
 // Shouldn't use instanceof to avoid loading Swing classes
 // if it's a pure AWT application.
 if (SunToolkit.isInstanceOf(component, "javax.swing.RootPaneContainer")) {
 javax.swing.RootPaneContainer rpc = (javax.swing.RootPaneContainer)component;
 javax.swing.JRootPane root = rpc.getRootPane();
 javax.swing.JLayeredPane lp = root.getLayeredPane();
 Container c = root.getContentPane();
 javax.swing.JComponent content =
 (c instanceof javax.swing.JComponent) ? (javax.swing.JComponent)c : null;
 lp.setOpaque(isOpaque);
 root.setOpaque(isOpaque);
 if (content != null) {
 content.setOpaque(isOpaque);

 // Iterate down one level to see whether we have a JApplet
 // (which is also a RootPaneContainer) which requires processing
 int numChildren = content.getComponentCount();
 if (numChildren > 0) {
 Component child = content.getComponent(0);
 // It's OK to use instanceof here because we've
 // already loaded the RootPaneContainer class by now
 if (child instanceof javax.swing.RootPaneContainer) {
 setLayersOpaque(child, isOpaque);
 }
 }
 }
 }
 }

 // ************************** MIXING CODE *******************************

 // A window has an owner, but it does NOT have a container
 @Override
 final Container getContainer() {
 return null;
 }

 /**
 * Applies the shape to the component
 * @param shape Shape to be applied to the component
 */
 @Override
 final void applyCompoundShape(Region shape) {
 // The shape calculated by mixing code is not intended to be applied
 // to windows or frames
 }

 @Override
 final void applyCurrentShape() {
 // The shape calculated by mixing code is not intended to be applied
 // to windows or frames
 }

 @Override
 final void mixOnReshaping() {
 // The shape calculated by mixing code is not intended to be applied
 // to windows or frames
 }

 @Override
 final Point getLocationOnWindow() {
 return new Point(0, 0);
 }

 // ****************** END OF MIXING CODE ********************************

 /**
 * Limit the given double value with the given range.
 */
 private static double limit(double value, double min, double max) {
 value = Math.max(value, min);
 value = Math.min(value, max);
 return value;
 }

 /**
 * Calculate the position of the security warning.
 *
 * This method gets the window location/size as reported by the native
 * system since the locally cached values may represent outdated data.
 *
 * The method is used from the native code, or via AWTAccessor.
 *
 * NOTE: this method is invoked on the toolkit thread, and therefore is not
 * supposed to become public/user-overridable.
 */
 private Point2D calculateSecurityWarningPosition(double x, double y,
 double w, double h)
 {
 // The desired location for the security warning
 double wx = x + w * RIGHT_ALIGNMENT + 2.0;
 double wy = y + h * TOP_ALIGNMENT + 0.0;

 // First, make sure the warning is not too far from the window bounds
 wx = Window.limit(wx,
 x - securityWarningWidth - 2,
 x + w + 2);
 wy = Window.limit(wy,
 y - securityWarningHeight - 2,
 y + h + 2);

 // Now make sure the warning window is visible on the screen
 GraphicsConfiguration graphicsConfig =
 getGraphicsConfiguration_NoClientCode();
 Rectangle screenBounds = graphicsConfig.getBounds();
 Insets screenInsets =
 Toolkit.getDefaultToolkit().getScreenInsets(graphicsConfig);

 wx = Window.limit(wx,
 screenBounds.x + screenInsets.left,
 screenBounds.x + screenBounds.width - screenInsets.right
 - securityWarningWidth);
 wy = Window.limit(wy,
 screenBounds.y + screenInsets.top,
 screenBounds.y + screenBounds.height - screenInsets.bottom
 - securityWarningHeight);

 return new Point2D.Double(wx, wy);
 }

 static {
 AWTAccessor.setWindowAccessor(new AWTAccessor.WindowAccessor() {
 public void updateWindow(Window window) {
 window.updateWindow();
 }

 public void setSecurityWarningSize(Window window, int width, int height)
 {
 window.securityWarningWidth = width;
 window.securityWarningHeight = height;
 }

 public Point2D calculateSecurityWarningPosition(Window window,
 double x, double y, double w, double h)
 {
 return window.calculateSecurityWarningPosition(x, y, w, h);
 }

 public void setLWRequestStatus(Window changed, boolean status) {
 changed.syncLWRequests = status;
 }

 public boolean isAutoRequestFocus(Window w) {
 return w.autoRequestFocus;
 }

 public boolean isTrayIconWindow(Window w) {
 return w.isTrayIconWindow;
 }

 public void setTrayIconWindow(Window w, boolean isTrayIconWindow) {
 w.isTrayIconWindow = isTrayIconWindow;
 }

 public Window[] getOwnedWindows(Window w) {
 return w.getOwnedWindows_NoClientCode();
 }
 }); // WindowAccessor
 } // static

 // a window doesn't need to be updated in the Z-order.
 @Override
 void updateZOrder() {}

} // class Window

/**
* This class is no longer used, but is maintained for Serialization
* backward-compatibility.
*/
class FocusManager implements java.io.Serializable {
 Container focusRoot;
 Component focusOwner;

 /**
 * Use serialVersionUID from JDK 1.1 for interoperability.
 */
 @Serial
 private static final long serialVersionUID = 2491878825643557906L;
}

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