/*
 * Copyright (c) 1995, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
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 *
 *
 *
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 *
 *
 *
 *
 */
package java.awt;

import java.awt.peer.FramePeer;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Vector;
import java.io.Serializable;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
import sun.awt.AppContext;
import sun.awt.SunToolkit;
import sun.awt.AWTAccessor;
import java.lang.ref.WeakReference;
import javax.accessibility.*;

/**
 * A <code>Frame</code> is a top-level window with a title and a border.
 * <p>
 * The size of the frame includes any area designated for the
 * border. The dimensions of the border area may be obtained
 * using the <code>getInsets</code> method, however, since
 * these dimensions are platform-dependent, a valid insets
 * value cannot be obtained until the frame is made displayable
 * by either calling <code>pack</code> or <code>show</code>.
 * Since the border area is included in the overall size of the
 * frame, the border effectively obscures a portion of the frame,
 * constraining the area available for rendering and/or displaying
 * subcomponents to the rectangle which has an upper-left corner
 * location of <code>(insets.left, insets.top)</code>, and has a size of
 * <code>width - (insets.left + insets.right)</code> by
 * <code>height - (insets.top + insets.bottom)</code>.
 * <p>
 * The default layout for a frame is <code>BorderLayout</code>.
 * <p>
 * A frame may have its native decorations (i.e. <code>Frame</code>
 * and <code>Titlebar</code>) turned off
 * with <code>setUndecorated</code>. This can only be done while the frame
 * is not {@link Component#isDisplayable() displayable}.
 * <p>
 * In a multi-screen environment, you can create a <code>Frame</code>
 * on a different screen device by constructing the <code>Frame</code>
 * with {@link #Frame(GraphicsConfiguration)} or
 * {@link #Frame(String title, GraphicsConfiguration)}. The
 * <code>GraphicsConfiguration</code> object is one of the
 * <code>GraphicsConfiguration</code> objects of the target screen
 * device.
 * <p>
 * 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-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.
 * <p>
 * <img src="doc-files/MultiScreen.gif"
 * alt="Diagram of virtual device encompassing three physical screens and one primary physical screen. The primary physical screen
 * shows (0,0) coords while a different physical screen shows (-80,-100) coords."
 * style="float:center; margin: 7px 10px;">
 * <p>
 * In such an environment, when calling <code>setLocation</code>,
 * you must pass a virtual coordinate to this method. Similarly,
 * calling <code>getLocationOnScreen</code> on a <code>Frame</code>
 * returns virtual device coordinates. Call the <code>getBounds</code>
 * method of a <code>GraphicsConfiguration</code> to find its origin in
 * the virtual coordinate system.
 * <p>
 * The following code sets the
 * location of the <code>Frame</code> at (10, 10) relative
 * to the origin of the physical screen of the corresponding
 * <code>GraphicsConfiguration</code>. If the bounds of the
 * <code>GraphicsConfiguration</code> is not taken into account, the
 * <code>Frame</code> 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</code>.
 *
 * <pre>
 * Frame f = new Frame(GraphicsConfiguration gc);
 * Rectangle bounds = gc.getBounds();
 * f.setLocation(10 + bounds.x, 10 + bounds.y);
 * </pre>
 *
 * <p>
 * Frames are capable of generating the following types of
 * <code>WindowEvent</code>s:
 * <ul>
 * <li><code>WINDOW_OPENED</code>
 * <li><code>WINDOW_CLOSING</code>:
 * <br>If the program doesn't
 * explicitly hide or dispose the window while processing
 * this event, the window close operation is canceled.
 * <li><code>WINDOW_CLOSED</code>
 * <li><code>WINDOW_ICONIFIED</code>
 * <li><code>WINDOW_DEICONIFIED</code>
 * <li><code>WINDOW_ACTIVATED</code>
 * <li><code>WINDOW_DEACTIVATED</code>
 * <li><code>WINDOW_GAINED_FOCUS</code>
 * <li><code>WINDOW_LOST_FOCUS</code>
 * <li><code>WINDOW_STATE_CHANGED</code>
 * </ul>
 *
 * @author Sami Shaio
 * @see WindowEvent
 * @see Window#addWindowListener
 * @since JDK1.0
 */
public class Frame extends Window implements MenuContainer {

 /* Note: These are being obsoleted; programs should use the Cursor class
 * variables going forward. See Cursor and Component.setCursor.
 */

 /**
 * @deprecated replaced by <code>Cursor.DEFAULT_CURSOR</code>.
 */
 @Deprecated
 public static final int DEFAULT_CURSOR = Cursor.DEFAULT_CURSOR;


 /**
 * @deprecated replaced by <code>Cursor.CROSSHAIR_CURSOR</code>.
 */
 @Deprecated
 public static final int CROSSHAIR_CURSOR = Cursor.CROSSHAIR_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.TEXT_CURSOR</code>.
 */
 @Deprecated
 public static final int TEXT_CURSOR = Cursor.TEXT_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.WAIT_CURSOR</code>.
 */
 @Deprecated
 public static final int WAIT_CURSOR = Cursor.WAIT_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.SW_RESIZE_CURSOR</code>.
 */
 @Deprecated
 public static final int SW_RESIZE_CURSOR = Cursor.SW_RESIZE_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.SE_RESIZE_CURSOR</code>.
 */
 @Deprecated
 public static final int SE_RESIZE_CURSOR = Cursor.SE_RESIZE_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.NW_RESIZE_CURSOR</code>.
 */
 @Deprecated
 public static final int NW_RESIZE_CURSOR = Cursor.NW_RESIZE_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.NE_RESIZE_CURSOR</code>.
 */
 @Deprecated
 public static final int NE_RESIZE_CURSOR = Cursor.NE_RESIZE_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.N_RESIZE_CURSOR</code>.
 */
 @Deprecated
 public static final int N_RESIZE_CURSOR = Cursor.N_RESIZE_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.S_RESIZE_CURSOR</code>.
 */
 @Deprecated
 public static final int S_RESIZE_CURSOR = Cursor.S_RESIZE_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.W_RESIZE_CURSOR</code>.
 */
 @Deprecated
 public static final int W_RESIZE_CURSOR = Cursor.W_RESIZE_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.E_RESIZE_CURSOR</code>.
 */
 @Deprecated
 public static final int E_RESIZE_CURSOR = Cursor.E_RESIZE_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.HAND_CURSOR</code>.
 */
 @Deprecated
 public static final int HAND_CURSOR = Cursor.HAND_CURSOR;

 /**
 * @deprecated replaced by <code>Cursor.MOVE_CURSOR</code>.
 */
 @Deprecated
 public static final int MOVE_CURSOR = Cursor.MOVE_CURSOR;


 /**
 * Frame is in the "normal" state. This symbolic constant names a
 * frame state with all state bits cleared.
 * @see #setExtendedState(int)
 * @see #getExtendedState
 */
 public static final int NORMAL = 0;

 /**
 * This state bit indicates that frame is iconified.
 * @see #setExtendedState(int)
 * @see #getExtendedState
 */
 public static final int ICONIFIED = 1;

 /**
 * This state bit indicates that frame is maximized in the
 * horizontal direction.
 * @see #setExtendedState(int)
 * @see #getExtendedState
 * @since 1.4
 */
 public static final int MAXIMIZED_HORIZ = 2;

 /**
 * This state bit indicates that frame is maximized in the
 * vertical direction.
 * @see #setExtendedState(int)
 * @see #getExtendedState
 * @since 1.4
 */
 public static final int MAXIMIZED_VERT = 4;

 /**
 * This state bit mask indicates that frame is fully maximized
 * (that is both horizontally and vertically). It is just a
 * convenience alias for
 * <code>MAXIMIZED_VERT&nbsp;|&nbsp;MAXIMIZED_HORIZ</code>.
 *
 * <p>Note that the correct test for frame being fully maximized is
 * <pre>
 * (state &amp; Frame.MAXIMIZED_BOTH) == Frame.MAXIMIZED_BOTH
 * </pre>
 *
 * <p>To test is frame is maximized in <em>some</em> direction use
 * <pre>
 * (state &amp; Frame.MAXIMIZED_BOTH) != 0
 * </pre>
 *
 * @see #setExtendedState(int)
 * @see #getExtendedState
 * @since 1.4
 */
 public static final int MAXIMIZED_BOTH = MAXIMIZED_VERT | MAXIMIZED_HORIZ;

 /**
 * Maximized bounds for this frame.
 * @see #setMaximizedBounds(Rectangle)
 * @see #getMaximizedBounds
 * @serial
 * @since 1.4
 */
 Rectangle maximizedBounds;


 /**
 * This is the title of the frame. It can be changed
 * at any time. <code>title</code> can be null and if
 * this is the case the <code>title</code> = "".
 *
 * @serial
 * @see #getTitle
 * @see #setTitle(String)
 */
 String title = "Untitled";

 /**
 * The frames menubar. If <code>menuBar</code> = null
 * the frame will not have a menubar.
 *
 * @serial
 * @see #getMenuBar
 * @see #setMenuBar(MenuBar)
 */
 MenuBar menuBar;

 /**
 * This field indicates whether the frame is resizable.
 * This property can be changed at any time.
 * <code>resizable</code> will be true if the frame is
 * resizable, otherwise it will be false.
 *
 * @serial
 * @see #isResizable()
 */
 boolean resizable = true;

 /**
 * This field indicates whether the frame is undecorated.
 * This property can only be changed while the frame is not displayable.
 * <code>undecorated</code> will be true if the frame is
 * undecorated, otherwise it will be false.
 *
 * @serial
 * @see #setUndecorated(boolean)
 * @see #isUndecorated()
 * @see Component#isDisplayable()
 * @since 1.4
 */
 boolean undecorated = false;

 /**
 * <code>mbManagement</code> is only used by the Motif implementation.
 *
 * @serial
 */
 boolean mbManagement = false; /* used only by the Motif impl. */

 // XXX: uwe: abuse old field for now
 // will need to take care of serialization
 private int state = NORMAL;

 /*
 * The Windows owned by the Frame.
 * Note: in 1.2 this has been superceded by Window.ownedWindowList
 *
 * @serial
 * @see java.awt.Window#ownedWindowList
 */
 Vector<Window> ownedWindows;

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

 /*
 * JDK 1.1 serialVersionUID
 */
 private static final long serialVersionUID = 2673458971256075116L;

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

 /**
 * Constructs a new instance of <code>Frame</code> that is
 * initially invisible. The title of the <code>Frame</code>
 * is empty.
 * @exception HeadlessException when
 * <code>GraphicsEnvironment.isHeadless()</code> returns <code>true</code>
 * @see java.awt.GraphicsEnvironment#isHeadless()
 * @see Component#setSize
 * @see Component#setVisible(boolean)
 */
 public Frame() throws HeadlessException {
 this("");
 }

 /**
 * Constructs a new, initially invisible {@code Frame} with the
 * specified {@code GraphicsConfiguration}.
 *
 * @param gc the <code>GraphicsConfiguration</code>
 * of the target screen device. If <code>gc</code>
 * is <code>null</code>, the system default
 * <code>GraphicsConfiguration</code> is assumed.
 * @exception IllegalArgumentException if
 * <code>gc</code> is not from a screen device.
 * @exception HeadlessException when
 * <code>GraphicsEnvironment.isHeadless()</code> returns <code>true</code>
 * @see java.awt.GraphicsEnvironment#isHeadless()
 * @since 1.3
 */
 public Frame(GraphicsConfiguration gc) {
 this("", gc);
 }

 /**
 * Constructs a new, initially invisible <code>Frame</code> object
 * with the specified title.
 * @param title the title to be displayed in the frame's border.
 * A <code>null</code> value
 * is treated as an empty string, "".
 * @exception HeadlessException when
 * <code>GraphicsEnvironment.isHeadless()</code> returns <code>true</code>
 * @see java.awt.GraphicsEnvironment#isHeadless()
 * @see java.awt.Component#setSize
 * @see java.awt.Component#setVisible(boolean)
 * @see java.awt.GraphicsConfiguration#getBounds
 */
 public Frame(String title) throws HeadlessException {
 init(title, null);
 }

 /**
 * Constructs a new, initially invisible <code>Frame</code> object
 * with the specified title and a
 * <code>GraphicsConfiguration</code>.
 * @param title the title to be displayed in the frame's border.
 * A <code>null</code> value
 * is treated as an empty string, "".
 * @param gc the <code>GraphicsConfiguration</code>
 * of the target screen device. If <code>gc</code> is
 * <code>null</code>, the system default
 * <code>GraphicsConfiguration</code> is assumed.
 * @exception IllegalArgumentException if <code>gc</code>
 * is not from a screen device.
 * @exception HeadlessException when
 * <code>GraphicsEnvironment.isHeadless()</code> returns <code>true</code>
 * @see java.awt.GraphicsEnvironment#isHeadless()
 * @see java.awt.Component#setSize
 * @see java.awt.Component#setVisible(boolean)
 * @see java.awt.GraphicsConfiguration#getBounds
 * @since 1.3
 */
 public Frame(String title, GraphicsConfiguration gc) {
 super(gc);
 init(title, gc);
 }

 private void init(String title, GraphicsConfiguration gc) {
 this.title = title;
 SunToolkit.checkAndSetPolicy(this);
 }

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

 /**
 * Makes this Frame displayable by connecting it to
 * a native screen resource. Making a frame displayable will
 * cause any of its children to be made displayable.
 * This method is called internally by the toolkit and should
 * not be called directly by programs.
 * @see Component#isDisplayable
 * @see #removeNotify
 */
 public void addNotify() {
 synchronized (getTreeLock()) {
 if (peer == null) {
 peer = getToolkit().createFrame(this);
 }
 FramePeer p = (FramePeer)peer;
 MenuBar menuBar = this.menuBar;
 if (menuBar != null) {
 mbManagement = true;
 menuBar.addNotify();
 p.setMenuBar(menuBar);
 }
 p.setMaximizedBounds(maximizedBounds);
 super.addNotify();
 }
 }

 /**
 * Gets the title of the frame. The title is displayed in the
 * frame's border.
 * @return the title of this frame, or an empty string ("")
 * if this frame doesn't have a title.
 * @see #setTitle(String)
 */
 public String getTitle() {
 return title;
 }

 /**
 * Sets the title for this frame to the specified string.
 * @param title the title to be displayed in the frame's border.
 * A <code>null</code> value
 * is treated as an empty string, "".
 * @see #getTitle
 */
 public void setTitle(String title) {
 String oldTitle = this.title;
 if (title == null) {
 title = "";
 }


 synchronized(this) {
 this.title = title;
 FramePeer peer = (FramePeer)this.peer;
 if (peer != null) {
 peer.setTitle(title);
 }
 }
 firePropertyChange("title", oldTitle, title);
 }

 /**
 * Returns the image to be displayed as the icon for this frame.
 * <p>
 * This method is obsolete and kept for backward compatibility
 * only. Use {@link Window#getIconImages Window.getIconImages()} instead.
 * <p>
 * If a list of several images was specified as a Window's icon,
 * this method will return the first item of the list.
 *
 * @return the icon image for this frame, or <code>null</code>
 * if this frame doesn't have an icon image.
 * @see #setIconImage(Image)
 * @see Window#getIconImages()
 * @see Window#setIconImages
 */
 public Image getIconImage() {
 java.util.List<Image> icons = this.icons;
 if (icons != null) {
 if (icons.size() > 0) {
 return icons.get(0);
 }
 }
 return null;
 }

 /**
 * {@inheritDoc}
 */
 public void setIconImage(Image image) {
 super.setIconImage(image);
 }

 /**
 * Gets the menu bar for this frame.
 * @return the menu bar for this frame, or <code>null</code>
 * if this frame doesn't have a menu bar.
 * @see #setMenuBar(MenuBar)
 */
 public MenuBar getMenuBar() {
 return menuBar;
 }

 /**
 * Sets the menu bar for this frame to the specified menu bar.
 * @param mb the menu bar being set.
 * If this parameter is <code>null</code> then any
 * existing menu bar on this frame is removed.
 * @see #getMenuBar
 */
 public void setMenuBar(MenuBar mb) {
 synchronized (getTreeLock()) {
 if (menuBar == mb) {
 return;
 }
 if ((mb != null) && (mb.parent != null)) {
 mb.parent.remove(mb);
 }
 if (menuBar != null) {
 remove(menuBar);
 }
 menuBar = mb;
 if (menuBar != null) {
 menuBar.parent = this;

 FramePeer peer = (FramePeer)this.peer;
 if (peer != null) {
 mbManagement = true;
 menuBar.addNotify();
 invalidateIfValid();
 peer.setMenuBar(menuBar);
 }
 }
 }
 }

 /**
 * Indicates whether this frame is resizable by the user.
 * By default, all frames are initially resizable.
 * @return <code>true</code> if the user can resize this frame;
 * <code>false</code> otherwise.
 * @see java.awt.Frame#setResizable(boolean)
 */
 public boolean isResizable() {
 return resizable;
 }

 /**
 * Sets whether this frame is resizable by the user.
 * @param resizable <code>true</code> if this frame is resizable;
 * <code>false</code> otherwise.
 * @see java.awt.Frame#isResizable
 */
 public void setResizable(boolean resizable) {
 boolean oldResizable = this.resizable;
 boolean testvalid = false;

 synchronized (this) {
 this.resizable = resizable;
 FramePeer peer = (FramePeer)this.peer;
 if (peer != null) {
 peer.setResizable(resizable);
 testvalid = true;
 }
 }

 // On some platforms, changing the resizable state affects
 // the insets of the Frame. If we could, we'd call invalidate()
 // from the peer, but we need to guarantee that we're not holding
 // the Frame lock when we call invalidate().
 if (testvalid) {
 invalidateIfValid();
 }
 firePropertyChange("resizable", oldResizable, resizable);
 }


 /**
 * Sets the state of this frame (obsolete).
 * <p>
 * In older versions of JDK a frame state could only be NORMAL or
 * ICONIFIED. Since JDK 1.4 set of supported frame states is
 * expanded and frame state is represented as a bitwise mask.
 * <p>
 * For compatibility with applications developed
 * earlier this method still accepts
 * {@code Frame.NORMAL} and
 * {@code Frame.ICONIFIED} only. The iconic
 * state of the frame is only changed, other aspects
 * of frame state are not affected by this method. If
 * the state passed to this method is neither {@code
 * Frame.NORMAL} nor {@code Frame.ICONIFIED} the
 * method performs no actions at all.
 * <p>Note that if the state is not supported on a
 * given platform, neither the state nor the return
 * value of the {@link #getState} method will be
 * changed. The application may determine whether a
 * specific state is supported via the {@link
 * java.awt.Toolkit#isFrameStateSupported} method.
 * <p><b>If the frame is currently visible on the
 * screen</b> (the {@link #isShowing} method returns
 * {@code true}), the developer should examine the
 * return value of the {@link
 * java.awt.event.WindowEvent#getNewState} method of
 * the {@code WindowEvent} received through the
 * {@link java.awt.event.WindowStateListener} to
 * determine that the state has actually been
 * changed.
 * <p><b>If the frame is not visible on the
 * screen</b>, the events may or may not be
 * generated. In this case the developer may assume
 * that the state changes immediately after this
 * method returns. Later, when the {@code
 * setVisible(true)} method is invoked, the frame
 * will attempt to apply this state. Receiving any
 * {@link
 * java.awt.event.WindowEvent#WINDOW_STATE_CHANGED}
 * events is not guaranteed in this case also.
 *
 * @param state either <code>Frame.NORMAL</code> or
 * <code>Frame.ICONIFIED</code>.
 * @see #setExtendedState(int)
 * @see java.awt.Window#addWindowStateListener
 */
 public synchronized void setState(int state) {
 int current = getExtendedState();
 if (state == ICONIFIED && (current & ICONIFIED) == 0) {
 setExtendedState(current | ICONIFIED);
 }
 else if (state == NORMAL && (current & ICONIFIED) != 0) {
 setExtendedState(current & ~ICONIFIED);
 }
 }

 /**
 * Sets the state of this frame. The state is
 * represented as a bitwise mask.
 * <ul>
 * <li><code>NORMAL</code>
 * <br>Indicates that no state bits are set.
 * <li><code>ICONIFIED</code>
 * <li><code>MAXIMIZED_HORIZ</code>
 * <li><code>MAXIMIZED_VERT</code>
 * <li><code>MAXIMIZED_BOTH</code>
 * <br>Concatenates <code>MAXIMIZED_HORIZ</code>
 * and <code>MAXIMIZED_VERT</code>.
 * </ul>
 * <p>Note that if the state is not supported on a
 * given platform, neither the state nor the return
 * value of the {@link #getExtendedState} method will
 * be changed. The application may determine whether
 * a specific state is supported via the {@link
 * java.awt.Toolkit#isFrameStateSupported} method.
 * <p><b>If the frame is currently visible on the
 * screen</b> (the {@link #isShowing} method returns
 * {@code true}), the developer should examine the
 * return value of the {@link
 * java.awt.event.WindowEvent#getNewState} method of
 * the {@code WindowEvent} received through the
 * {@link java.awt.event.WindowStateListener} to
 * determine that the state has actually been
 * changed.
 * <p><b>If the frame is not visible on the
 * screen</b>, the events may or may not be
 * generated. In this case the developer may assume
 * that the state changes immediately after this
 * method returns. Later, when the {@code
 * setVisible(true)} method is invoked, the frame
 * will attempt to apply this state. Receiving any
 * {@link
 * java.awt.event.WindowEvent#WINDOW_STATE_CHANGED}
 * events is not guaranteed in this case also.
 *
 * @param state a bitwise mask of frame state constants
 * @since 1.4
 * @see java.awt.Window#addWindowStateListener
 */
 public void setExtendedState(int state) {
 if ( !isFrameStateSupported( state ) ) {
 return;
 }
 synchronized (getObjectLock()) {
 this.state = state;
 }
 // peer.setState must be called outside of object lock
 // synchronization block to avoid possible deadlock
 FramePeer peer = (FramePeer)this.peer;
 if (peer != null) {
 peer.setState(state);
 }
 }
 private boolean isFrameStateSupported(int state) {
 if( !getToolkit().isFrameStateSupported( state ) ) {
 // * Toolkit.isFrameStateSupported returns always false
 // on compound state even if all parts are supported;
 // * if part of state is not supported, state is not supported;
 // * MAXIMIZED_BOTH is not a compound state.
 if( ((state & ICONIFIED) != 0) &&
 !getToolkit().isFrameStateSupported( ICONIFIED )) {
 return false;
 }else {
 state &= ~ICONIFIED;
 }
 return getToolkit().isFrameStateSupported( state );
 }
 return true;
 }

 /**
 * Gets the state of this frame (obsolete).
 * <p>
 * In older versions of JDK a frame state could only be NORMAL or
 * ICONIFIED. Since JDK 1.4 set of supported frame states is
 * expanded and frame state is represented as a bitwise mask.
 * <p>
 * For compatibility with old programs this method still returns
 * <code>Frame.NORMAL</code> and <code>Frame.ICONIFIED</code> but
 * it only reports the iconic state of the frame, other aspects of
 * frame state are not reported by this method.
 *
 * @return <code>Frame.NORMAL</code> or <code>Frame.ICONIFIED</code>.
 * @see #setState(int)
 * @see #getExtendedState
 */
 public synchronized int getState() {
 return (getExtendedState() & ICONIFIED) != 0 ? ICONIFIED : NORMAL;
 }


 /**
 * Gets the state of this frame. The state is
 * represented as a bitwise mask.
 * <ul>
 * <li><code>NORMAL</code>
 * <br>Indicates that no state bits are set.
 * <li><code>ICONIFIED</code>
 * <li><code>MAXIMIZED_HORIZ</code>
 * <li><code>MAXIMIZED_VERT</code>
 * <li><code>MAXIMIZED_BOTH</code>
 * <br>Concatenates <code>MAXIMIZED_HORIZ</code>
 * and <code>MAXIMIZED_VERT</code>.
 * </ul>
 *
 * @return a bitwise mask of frame state constants
 * @see #setExtendedState(int)
 * @since 1.4
 */
 public int getExtendedState() {
 synchronized (getObjectLock()) {
 return state;
 }
 }

 static {
 AWTAccessor.setFrameAccessor(
 new AWTAccessor.FrameAccessor() {
 public void setExtendedState(Frame frame, int state) {
 synchronized(frame.getObjectLock()) {
 frame.state = state;
 }
 }
 public int getExtendedState(Frame frame) {
 synchronized(frame.getObjectLock()) {
 return frame.state;
 }
 }
 public Rectangle getMaximizedBounds(Frame frame) {
 synchronized(frame.getObjectLock()) {
 return frame.maximizedBounds;
 }
 }
 }
 );
 }

 /**
 * Sets the maximized bounds for this frame.
 * <p>
 * When a frame is in maximized state the system supplies some
 * defaults bounds. This method allows some or all of those
 * system supplied values to be overridden.
 * <p>
 * If <code>bounds</code> is <code>null</code>, accept bounds
 * supplied by the system. If non-<code>null</code> you can
 * override some of the system supplied values while accepting
 * others by setting those fields you want to accept from system
 * to <code>Integer.MAX_VALUE</code>.
 * <p>
 * Note, the given maximized bounds are used as a hint for the native
 * system, because the underlying platform may not support setting the
 * location and/or size of the maximized windows. If that is the case, the
 * provided values do not affect the appearance of the frame in the
 * maximized state.
 *
 * @param bounds bounds for the maximized state
 * @see #getMaximizedBounds()
 * @since 1.4
 */
 public void setMaximizedBounds(Rectangle bounds) {
 synchronized(getObjectLock()) {
 this.maximizedBounds = bounds;
 }
 FramePeer peer = (FramePeer)this.peer;
 if (peer != null) {
 peer.setMaximizedBounds(bounds);
 }
 }

 /**
 * Gets maximized bounds for this frame.
 * Some fields may contain <code>Integer.MAX_VALUE</code> to indicate
 * that system supplied values for this field must be used.
 *
 * @return maximized bounds for this frame; may be <code>null</code>
 * @see #setMaximizedBounds(Rectangle)
 * @since 1.4
 */
 public Rectangle getMaximizedBounds() {
 synchronized(getObjectLock()) {
 return maximizedBounds;
 }
 }


 /**
 * Disables or enables decorations for this frame.
 * <p>
 * This method can only be called while the frame is not displayable. To
 * make this frame decorated, it must be opaque and have the default shape,
 * otherwise the {@code IllegalComponentStateException} will be thrown.
 * Refer to {@link Window#setShape}, {@link Window#setOpacity} and {@link
 * Window#setBackground} for details
 *
 * @param undecorated {@code true} if no frame decorations are to be
 * enabled; {@code false} if frame decorations are to be enabled
 *
 * @throws IllegalComponentStateException if the frame is displayable
 * @throws IllegalComponentStateException if {@code undecorated} is
 * {@code false}, and this frame does not have the default shape
 * @throws IllegalComponentStateException if {@code undecorated} is
 * {@code false}, and this frame opacity is less than {@code 1.0f}
 * @throws IllegalComponentStateException if {@code undecorated} is
 * {@code false}, and the alpha value of this frame background
 * color is less than {@code 1.0f}
 *
 * @see #isUndecorated
 * @see Component#isDisplayable
 * @see Window#getShape
 * @see Window#getOpacity
 * @see Window#getBackground
 * @see javax.swing.JFrame#setDefaultLookAndFeelDecorated(boolean)
 *
 * @since 1.4
 */
 public void setUndecorated(boolean undecorated) {
 /* Make sure we don't run in the middle of peer creation.*/
 synchronized (getTreeLock()) {
 if (isDisplayable()) {
 throw new IllegalComponentStateException("The frame is displayable.");
 }
 if (!undecorated) {
 if (getOpacity() < 1.0f) {
 throw new IllegalComponentStateException("The frame is not opaque");
 }
 if (getShape() != null) {
 throw new IllegalComponentStateException("The frame does not have a default shape");
 }
 Color bg = getBackground();
 if ((bg != null) && (bg.getAlpha() < 255)) {
 throw new IllegalComponentStateException("The frame background color is not opaque");
 }
 }
 this.undecorated = undecorated;
 }
 }

 /**
 * Indicates whether this frame is undecorated.
 * By default, all frames are initially decorated.
 * @return <code>true</code> if frame is undecorated;
 * <code>false</code> otherwise.
 * @see java.awt.Frame#setUndecorated(boolean)
 * @since 1.4
 */
 public boolean isUndecorated() {
 return undecorated;
 }

 /**
 * {@inheritDoc}
 */
 @Override
 public void setOpacity(float opacity) {
 synchronized (getTreeLock()) {
 if ((opacity < 1.0f) && !isUndecorated()) {
 throw new IllegalComponentStateException("The frame is decorated");
 }
 super.setOpacity(opacity);
 }
 }

 /**
 * {@inheritDoc}
 */
 @Override
 public void setShape(Shape shape) {
 synchronized (getTreeLock()) {
 if ((shape != null) && !isUndecorated()) {
 throw new IllegalComponentStateException("The frame is decorated");
 }
 super.setShape(shape);
 }
 }

 /**
 * {@inheritDoc}
 */
 @Override
 public void setBackground(Color bgColor) {
 synchronized (getTreeLock()) {
 if ((bgColor != null) && (bgColor.getAlpha() < 255) && !isUndecorated()) {
 throw new IllegalComponentStateException("The frame is decorated");
 }
 super.setBackground(bgColor);
 }
 }

 /**
 * Removes the specified menu bar from this frame.
 * @param m the menu component to remove.
 * If <code>m</code> is <code>null</code>, then
 * no action is taken
 */
 public void remove(MenuComponent m) {
 if (m == null) {
 return;
 }
 synchronized (getTreeLock()) {
 if (m == menuBar) {
 menuBar = null;
 FramePeer peer = (FramePeer)this.peer;
 if (peer != null) {
 mbManagement = true;
 invalidateIfValid();
 peer.setMenuBar(null);
 m.removeNotify();
 }
 m.parent = null;
 } else {
 super.remove(m);
 }
 }
 }

 /**
 * Makes this Frame undisplayable by removing its connection
 * to its native screen resource. Making a Frame undisplayable
 * will cause any of its children to be made undisplayable.
 * This method is called by the toolkit internally and should
 * not be called directly by programs.
 * @see Component#isDisplayable
 * @see #addNotify
 */
 public void removeNotify() {
 synchronized (getTreeLock()) {
 FramePeer peer = (FramePeer)this.peer;
 if (peer != null) {
 // get the latest Frame state before disposing
 getState();

 if (menuBar != null) {
 mbManagement = true;
 peer.setMenuBar(null);
 menuBar.removeNotify();
 }
 }
 super.removeNotify();
 }
 }

 void postProcessKeyEvent(KeyEvent e) {
 if (menuBar != null && menuBar.handleShortcut(e)) {
 e.consume();
 return;
 }
 super.postProcessKeyEvent(e);
 }

 /**
 * Returns a string representing the state of this <code>Frame</code>.
 * This method is intended to be used only for debugging purposes, and the
 * content and format of the returned string may vary between
 * implementations. The returned string may be empty but may not be
 * <code>null</code>.
 *
 * @return the parameter string of this frame
 */
 protected String paramString() {
 String str = super.paramString();
 if (title != null) {
 str += ",title=" + title;
 }
 if (resizable) {
 str += ",resizable";
 }
 int state = getExtendedState();
 if (state == NORMAL) {
 str += ",normal";
 }
 else {
 if ((state & ICONIFIED) != 0) {
 str += ",iconified";
 }
 if ((state & MAXIMIZED_BOTH) == MAXIMIZED_BOTH) {
 str += ",maximized";
 }
 else if ((state & MAXIMIZED_HORIZ) != 0) {
 str += ",maximized_horiz";
 }
 else if ((state & MAXIMIZED_VERT) != 0) {
 str += ",maximized_vert";
 }
 }
 return str;
 }

 /**
 * @deprecated As of JDK version 1.1,
 * replaced by <code>Component.setCursor(Cursor)</code>.
 */
 @Deprecated
 public void setCursor(int cursorType) {
 if (cursorType < DEFAULT_CURSOR || cursorType > MOVE_CURSOR) {
 throw new IllegalArgumentException("illegal cursor type");
 }
 setCursor(Cursor.getPredefinedCursor(cursorType));
 }

 /**
 * @deprecated As of JDK version 1.1,
 * replaced by <code>Component.getCursor()</code>.
 */
 @Deprecated
 public int getCursorType() {
 return (getCursor().getType());
 }

 /**
 * Returns an array of all {@code Frame}s created by this application.
 * If called from an applet, the array includes only the {@code Frame}s
 * accessible by that applet.
 * <p>
 * <b>Warning:</b> this method may return system created frames, such
 * as a shared, hidden frame which is used by Swing. Applications
 * should not assume the existence of these frames, nor should an
 * application assume anything about these frames such as component
 * positions, <code>LayoutManager</code>s or serialization.
 * <p>
 * <b>Note</b>: To obtain a list of all ownerless windows, including
 * ownerless {@code Dialog}s (introduced in release 1.6), use {@link
 * Window#getOwnerlessWindows Window.getOwnerlessWindows}.
 *
 * @see Window#getWindows()
 * @see Window#getOwnerlessWindows
 *
 * @since 1.2
 */
 public static Frame[] getFrames() {
 Window[] allWindows = Window.getWindows();

 int frameCount = 0;
 for (Window w : allWindows) {
 if (w instanceof Frame) {
 frameCount++;
 }
 }

 Frame[] frames = new Frame[frameCount];
 int c = 0;
 for (Window w : allWindows) {
 if (w instanceof Frame) {
 frames[c++] = (Frame)w;
 }
 }

 return frames;
 }

 /* Serialization support. If there's a MenuBar we restore
 * its (transient) parent field here. Likewise for top level
 * windows that are "owned" by this frame.
 */

 /**
 * <code>Frame</code>'s Serialized Data Version.
 *
 * @serial
 */
 private int frameSerializedDataVersion = 1;

 /**
 * Writes default serializable fields to stream. Writes
 * an optional serializable icon <code>Image</code>, which is
 * available as of 1.4.
 *
 * @param s the <code>ObjectOutputStream</code> to write
 * @serialData an optional icon <code>Image</code>
 * @see java.awt.Image
 * @see #getIconImage
 * @see #setIconImage(Image)
 * @see #readObject(ObjectInputStream)
 */
 private void writeObject(ObjectOutputStream s)
 throws IOException
 {
 s.defaultWriteObject();
 if (icons != null && icons.size() > 0) {
 Image icon1 = icons.get(0);
 if (icon1 instanceof Serializable) {
 s.writeObject(icon1);
 return;
 }
 }
 s.writeObject(null);
 }

 /**
 * Reads the <code>ObjectInputStream</code>. Tries
 * to read an icon <code>Image</code>, which is optional
 * data available as of 1.4. If an icon <code>Image</code>
 * is not available, but anything other than an EOF
 * is detected, an <code>OptionalDataException</code>
 * will be thrown.
 * Unrecognized keys or values will be ignored.
 *
 * @param s the <code>ObjectInputStream</code> to read
 * @exception java.io.OptionalDataException if an icon <code>Image</code>
 * is not available, but anything other than an EOF
 * is detected
 * @exception HeadlessException if
 * <code>GraphicsEnvironment.isHeadless</code> returns
 * <code>true</code>
 * @see java.awt.GraphicsEnvironment#isHeadless()
 * @see java.awt.Image
 * @see #getIconImage
 * @see #setIconImage(Image)
 * @see #writeObject(ObjectOutputStream)
 */
 private void readObject(ObjectInputStream s)
 throws ClassNotFoundException, IOException, HeadlessException
 {
 // HeadlessException is thrown by Window's readObject
 s.defaultReadObject();
 try {
 Image icon = (Image) s.readObject();
 if (icons == null) {
 icons = new ArrayList<Image>();
 icons.add(icon);
 }
 } catch (java.io.OptionalDataException e) {
 // pre-1.4 instances will not have this optional data.
 // 1.6 and later instances serialize icons in the Window class
 // e.eof will be true to indicate that there is no more
 // data available for this object.

 // If e.eof is not true, throw the exception as it
 // might have been caused by unrelated reasons.
 if (!e.eof) {
 throw (e);
 }
 }

 if (menuBar != null)
 menuBar.parent = this;

 // Ensure 1.1 serialized Frames can read & hook-up
 // owned windows properly
 //
 if (ownedWindows != null) {
 for (int i = 0; i < ownedWindows.size(); i++) {
 connectOwnedWindow(ownedWindows.elementAt(i));
 }
 ownedWindows = null;
 }
 }

 /**
 * Initialize JNI field and method IDs
 */
 private static native void initIDs();

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

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

 /**
 * This class implements accessibility support for the
 * <code>Frame</code> class. It provides an implementation of the
 * Java Accessibility API appropriate to frame user-interface elements.
 * @since 1.3
 */
 protected class AccessibleAWTFrame extends AccessibleAWTWindow
 {
 /*
 * JDK 1.3 serialVersionUID
 */
 private static final long serialVersionUID = -6172960752956030250L;

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

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


 } // inner class AccessibleAWTFrame

}