/*
* @(#)Window.java 1.115 06/10/10
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program 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.
*
* This program 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 at /legal/license.txt).
*
* 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
/*
* Warning :
* Two versions of this file exist in this workspace.
* One for Personal Basis, and one for Personal Profile.
* Don't edit the wrong one !!!
*/
package java.awt;
import sun.awt.peer.WindowPeer;
import sun.awt.PeerBasedToolkit;
import java.awt.im.InputContext;
import java.awt.event.*;
import java.util.Vector;
import java.util.Locale;
import java.io.Serializable;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
import java.io.OptionalDataException;
import java.lang.reflect.Constructor;
import java.security.AccessController;
import sun.security.action.GetPropertyAction;
import java.util.Set;
import java.util.EventListener;
import java.awt.AWTEventMulticaster;
/**
* A <code>Window</code> object is a top-level window with no borders and no
* menubar.
* The default layout for a window is <code>BorderLayout</code>.
* <p>
* A window must have either a frame, dialog, or another window defined as its
* owner when it's constructed.
* <p>
* In a multi-screen environment, you can create a <code>Window</code>
* on a different screen device by constructing the <code>Window</code>
* with {@link #Window(Window, 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 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.
* <p>
* <img src="doc-files/MultiScreen.gif"
* ALIGN=center HSPACE=10 VSPACE=7>
* <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>Window</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 a <code>Window</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>Window</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>
* Window w = new Window(Window owner, GraphicsConfiguration gc);
* Rectangle bounds = gc.getBounds();
* w.setLocation(10 + bounds.x, 10 + bounds.y);
* </pre>
*
* <p>
* Windows are capable of generating the following window events:
* WindowOpened, WindowClosed.
*
* @version @(#)Window.java 1.100 02/08/21
* @author Sami Shaio
* @author Arthur van Hoff
* @see WindowEvent
* @see #addWindowListener
* @see java.awt.BorderLayout
* @since JDK1.0
*/
public class Window extends Container {
String warningString;
static final int OPENED = 0x01;
int state;
transient WindowListener windowListener;
transient InputContext inputContext;
// 6182409: Window.pack does not work correctly.
// See also Component.isPacked.
transient boolean beforeFirstShow = true;
/**
* Unused. Maintained for serialization backward-compatibility.
*
* @serial
* @since 1.2
*/
private transient FocusManager focusMgr;
private static final String base = "win";
private static int nameCounter = 0;
/**
* A vector containing all the windows this
* window currently owns.
*/
transient Vector ownedWindows = new Vector();
/*
* JDK 1.1 serialVersionUID
*/
private static final long serialVersionUID = 4497834738069338734L;
Window() {
this((GraphicsConfiguration) null);
}
/**
* Construct a name for this component. Called by getName() when the
* name is null.
*/
String constructComponentName() {
return base + nameCounter++;
}
/**
* Constructs a new invisible window.
* <p>
* The window is not initially visible. Call the <code>show</code>
* method to cause the window to become visible.
* @param parent the main application frame.
* @exception UnsupportedOperationException if the implementation does
* not allow the direct creation of window objects.
* @see java.awt.Window#show
* @see java.awt.Component#setSize
* @since JDK1.0
*/
public Window(Frame parent) {
this(parent, (GraphicsConfiguration) null);
}
public Window(Window owner) {
this(owner, (GraphicsConfiguration) null);
}
Window(GraphicsConfiguration gc) {
setWarningString();
this.cursor = Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
checkSecurity();
// Get default graphics configuration if gc == null
if (gc == null) {
this.graphicsConfig =
GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
} else {
this.graphicsConfig = gc;
}
// Compatibility for serialization
this.focusMgr = new FocusManager();
this.visible = false;
setLayout(new BorderLayout());
}
public Window(Window owner, GraphicsConfiguration gc) {
this(gc);
if (owner == null) {
throw new IllegalArgumentException("null parent window");
}
this.parent = owner;
owner.addOwnedWindow(this);
}
/**
* Adds the specified window to the list of windows owned by
* the frame.
* @param window the window to be added
*/
Window addOwnedWindow(Window window) {
if (window != null) {
ownedWindows.addElement(window);
}
return window;
}
/**
* 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</code>.
* </p>
* @see Window#show
* @see Window#dispose
*/
public void hide() {
synchronized (ownedWindows) {
for (int i = 0; i < ownedWindows.size(); i++) {
Window child = (Window) ownedWindows.elementAt(i);
if (child != null) {
child.hide();
}
}
}
super.hide();
}
// added to fix bug 6186499 - this is in J2SE; we missed in when bringing
// in focus mgmt changes - we don't want to clear the focus owner for a
// window on hide
final void clearMostRecentFocusOwnerOnHide() {
/* do nothing */
}
/**
* Removes the specified window from the list of windows owned by
* the frame.
* @param window the window to be added
*/
void removeOwnedWindow(Window window) {
if (window != null) {
if (ownedWindows != null) {
ownedWindows.removeElement(window);
}
}
}
void connectOwnedWindow(Window child) {
child.parent = this;
addOwnedWindow(child);
}
private void checkSecurity() {/*if (this instanceof FileDialog) {
// FileDialog not allowed if minawt
throw new UnsupportedOperationException();
} else if (this instanceof Dialog) {
// Other Dialog is always OK
} else if (this instanceof sun.awt.EmbeddedFrame) {
// EmbeddedFrame is always OK
} else if (this instanceof Frame) {
if (madeOneAlready) {
// if minawt, only one regular Frame is allowed
throw new UnsupportedOperationException();
} else {
madeOneAlready = true;
}
} else {
// We've checked everything else, so this must be a plain Window.
// Not allowed if minawt
throw new UnsupportedOperationException();
}*/}
/**
* Creates the Window's peer. The peer allows us to modify the
* appearance of the Window without changing its functionality.
*/
public void addNotify() {
synchronized (getTreeLock()) {
if (peer == null) {
peer = ((PeerBasedToolkit) getToolkit()).createWindow(this);
}
super.addNotify();
}
}
/**
* Causes subcomponents of this window to be laid out at their
* preferred size.
* @since JDK1.0
*/
public void pack() {
Container parent = this.parent;
if (parent != null && parent.peer == null) {
parent.addNotify();
}
if (peer == null) {
addNotify();
}
// 6182409: Window.pack does not work correctly.
if (peer != null) {
setSize(getPreferredSize());
}
if (beforeFirstShow) {
isPacked = true;
}
validate();
}
/**
* Shows this window, and brings it to the front.
* <p>
* If this window is not yet visible, <code>show</code>
* makes it visible. If this window is already visible,
* then this method brings it to the front.
* @see java.awt.Window#toFront
* @see java.awt.Component#setVisible
* @since JDK1.0
*/
public void show() {
Container parent = this.parent;
if (parent != null && parent.peer == null) {
parent.addNotify();
}
if (peer == null) {
addNotify();
}
validate();
if (visible) {
toFront();
} else {
// 6182409: Window.pack does not work correctly.
beforeFirstShow = false;
super.show();
}
// If first time shown, generate WindowOpened event
if ((state & OPENED) == 0) {
//postWindowEvent(WindowEvent.WINDOW_OPENED);
WindowEvent e = new WindowEvent(this, WindowEvent.WINDOW_OPENED);
Toolkit.getEventQueue().postEvent(e);
state |= OPENED;
}
}
synchronized void postWindowEvent(int id) {
if (windowListener != null ||
(eventMask & AWTEvent.WINDOW_EVENT_MASK) != 0) {
WindowEvent e = new WindowEvent(this, id);
Toolkit.getEventQueue().postEvent(e);
}
}
/**
* Disposes of this window. This method must
* be called to release the resources that
* are used for the window.
* @since JDK1.0
*/
public void dispose() {
synchronized (getTreeLock()) {
if (inputContext != null) {
InputContext toDispose = inputContext;
inputContext = null;
toDispose.dispose();
}
synchronized (ownedWindows) {
for (int i = 0; i < ownedWindows.size(); i++) {
Window child = (Window) (ownedWindows.elementAt(i));
if (child != null) {
child.dispose();
}
}
}
hide();
// 6182409: Window.pack does not work correctly.
beforeFirstShow = true;
removeNotify();
if (parent != null) {
Window parent = (Window) this.parent;
parent.removeOwnedWindow(this);
}
postWindowEvent(WindowEvent.WINDOW_CLOSED);
}
}
/**
* Brings this window to the front.
* Places this window at the top of the stacking order and
* shows it in front of any other windows.
* @see java.awt.Window#toBack
* @since JDK1.0
*/
public void toFront() {
WindowPeer peer = (WindowPeer) this.peer;
if (peer != null) {
peer.toFront();
}
}
/**
* Sends this window to the back.
* Places this window at the bottom of the stacking order and
* makes the corresponding adjustment to other visible windows.
* @see java.awt.Window#toFront
* @since JDK1.0
*/
public void toBack() {
WindowPeer peer = (WindowPeer) this.peer;
if (peer != null) {
peer.toBack();
}
}
/**
* Returns the toolkit of this frame.
* @return the toolkit of this window.
* @see java.awt.Toolkit
* @see java.awt.Toolkit#getDefaultToolkit()
* @see java.awt.Component#getToolkit()
* @since JDK1.0
*/
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's <code>checkTopLevelWindow</code> method returns
* <code>false</code> when this window is passed to it as an
* argument.
* <p>
* If the window is secure, then <code>getWarningString</code>
* returns <code>null</code>. If the window is insecure, this
* method checks for the system property
* <code>awt.appletWarning</code>
* and returns the string value of that property.
* @return the warning string for this window.
* @see java.lang.SecurityManager#checkTopLevelWindow(java.lang.Object)
* @since JDK1.0
*/
public final String getWarningString() {
return warningString;
}
private void setWarningString() {
warningString = null;
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
if (!sm.checkTopLevelWindow(this)) {
// make sure the privileged action is only
// for getting the property! We don't want the
// above checkTopLevelWindow call to always succeed!
warningString = (String) AccessController.doPrivileged(
new GetPropertyAction("awt.appletWarning",
"Java Applet Window"));
}
}
}
/**
* Gets the <code>Locale</code> 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 JDK1.1
*/
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
*/
public synchronized InputContext getInputContext() {
if (inputContext == null) {
inputContext = InputContext.getInstance();
}
return inputContext;
}
/**
* Set the cursor image to a predefined cursor.
* @param <code>cursor</code> One of the constants defined
* by the <code>Cursor</code> class. If this parameter is null
* then the cursor for this window will be set to the type
* Cursor.DEFAULT_CURSOR .
* @see java.awt.Component#getCursor
* @see java.awt.Cursor
* @since JDK1.1
*/
public synchronized void setCursor(Cursor cursor) {
if (cursor == null) {
cursor = Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
}
super.setCursor(cursor);
}
/**
* Adds the specified window listener to receive window events from
* this window.
* @param l the window listener
*/
public synchronized void addWindowListener(WindowListener l) {
windowListener = AWTEventMulticaster.add(windowListener, l);
newEventsOnly = true;
}
/**
* Removes the specified window listener so that it no longer
* receives window events from this window.
* @param l the window listener
*/
public synchronized void removeWindowListener(WindowListener l) {
windowListener = AWTEventMulticaster.remove(windowListener, l);
}
/**
* Returns an array of all the window listeners
* registered on this window.
*
* @return all of this window's <code>WindowListener</code>s
* or an empty array if no window
* listeners are currently registered
*
* @see #addWindowListener
* @see #removeWindowListener
* @since 1.4
*/
public synchronized WindowListener[] getWindowListeners() {
return (WindowListener[]) AWTEventMulticaster.getListeners(
(EventListener)windowListener,
WindowListener.class);
}
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;
default:
break;
}
return super.eventEnabled(e);
}
/**
* Processes events on this window. If the event is an WindowEvent,
* it invokes the processWindowEvent method, else it invokes its
* superclass's processEvent.
* @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;
default:
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:
* a) A WindowListener object is registered via addWindowListener()
* b) Window events are enabled via enableEvents()
* @see Component#enableEvents
* @param e the window event
*/
protected void processWindowEvent(WindowEvent e) {
if (windowListener != null) {
switch (e.getID()) {
case WindowEvent.WINDOW_OPENED:
windowListener.windowOpened(e);
break;
case WindowEvent.WINDOW_CLOSING:
windowListener.windowClosing(e);
break;
case WindowEvent.WINDOW_CLOSED:
windowListener.windowClosed(e);
break;
case WindowEvent.WINDOW_ICONIFIED:
windowListener.windowIconified(e);
break;
case WindowEvent.WINDOW_DEICONIFIED:
windowListener.windowDeiconified(e);
break;
case WindowEvent.WINDOW_ACTIVATED:
windowListener.windowActivated(e);
break;
case WindowEvent.WINDOW_DEACTIVATED:
windowListener.windowDeactivated(e);
break;
default:
break;
}
}
}
void preProcessKeyEvent(KeyEvent e) {
// Dump the list of child windows to System.out.
if (e.isActionKey() && e.getKeyCode() == KeyEvent.VK_F1 &&
e.isControlDown() && e.isShiftDown()) {
list(System.out, 0);
}
}
void postProcessKeyEvent(KeyEvent e) {
// Do nothing.
}
public boolean isActive() {
return (KeyboardFocusManager.getCurrentKeyboardFocusManager().
getActiveWindow() == this);
}
/**
* Returns the child component of this Window which has focus if and
* only if this Window is active.
* @return the component with focus, or null if no children have focus
* assigned to them.
*/
public Component getFocusOwner() {
return (isFocused()) ?
KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner()
: null;
}
/*
* 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)</code>.
*/
public boolean postEvent(Event e) {
if (handleEvent(e)) {
e.consume();
return true;
}
return false;
}
/**
* Checks if this Window is showing on screen.
* @see java.awt.Component#setVisible(boolean)
*/
public boolean isShowing() {
return visible;
}
/* Serialization support.
*/
private int windowSerializedDataVersion = 1;
private void writeObject(ObjectOutputStream s)
throws IOException {
s.defaultWriteObject();
AWTEventMulticaster.save(s, windowListenerK, windowListener);
s.writeObject(null);
synchronized (ownedWindows) {
for (int i = 0; i < ownedWindows.size(); i++) {
Window child = (Window) ownedWindows.elementAt(i);
if (child != null) {
s.writeObject(ownedWindowK);
s.writeObject(child);
}
}
}
s.writeObject(null);
}
private void readObject(ObjectInputStream s)
throws ClassNotFoundException, IOException {
s.defaultReadObject();
checkSecurity();
ownedWindows = new Vector();
Object keyOrNull;
while (null != (keyOrNull = s.readObject())) {
String key = ((String) keyOrNull).intern();
if (windowListenerK == key)
addWindowListener((WindowListener) (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();
}
}
catch (OptionalDataException e) {
// 1.1 serialized form
// ownedWindowList will be updated by Frame.readObject
}
setWarningString();
}
// Focus-related functionality added
//-------------------------------------------------------------------------
private transient Component temporaryLostComponent;
transient WindowFocusListener windowFocusListener;
private boolean focusableWindowState = true;
public synchronized void addWindowFocusListener(WindowFocusListener l) {
if (l == null) {
return;
}
windowFocusListener = AWTEventMulticaster.add(windowFocusListener, l);
newEventsOnly = true;
}
public synchronized WindowFocusListener[] getWindowFocusListeners() {
return (WindowFocusListener[]) AWTEventMulticaster.getListeners(
(EventListener)windowFocusListener,
WindowFocusListener.class);
}
public synchronized void removeWindowFocusListener(WindowFocusListener l) {
if (l == null) {
return;
}
windowFocusListener = AWTEventMulticaster.remove(windowFocusListener, l);
}
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;
}
public boolean getFocusableWindowState() {
return focusableWindowState;
}
public void setFocusableWindowState(boolean focusableWindowState) {
boolean oldFocusableWindowState;
synchronized (this) {
oldFocusableWindowState = this.focusableWindowState;
this.focusableWindowState = focusableWindowState;
}
firePropertyChange("focusableWindowState",
new Boolean(oldFocusableWindowState),
new Boolean(focusableWindowState));
if (oldFocusableWindowState && !focusableWindowState && isFocused()) {
for (Window owner = (Window)getParent(); owner != null;
owner = (Window)owner.getParent()) {
Component toFocus =
KeyboardFocusManager.getMostRecentFocusOwner(owner);
if (toFocus != null && toFocus.requestFocus(false)) {
return;
}
}
KeyboardFocusManager.getCurrentKeyboardFocusManager().
clearGlobalFocusOwner();
}
}
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;
}
}
}
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;
}
}
}
public boolean isFocused() {
return (KeyboardFocusManager.getCurrentKeyboardFocusManager().
getGlobalFocusedWindow() == this);
}
public Set 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
Set keystrokes = (focusTraversalKeys != null) ?
focusTraversalKeys[id] : null;
if (keystrokes != null) {
return keystrokes;
} else {
return KeyboardFocusManager.getCurrentKeyboardFocusManager().
getDefaultFocusTraversalKeys(id);
}
}
public final void setFocusCycleRoot(boolean focusCycleRoot) {
}
public final boolean isFocusCycleRoot() {
return true;
}
public final Container getFocusCycleRootAncestor() {
return null;
}
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.isDisplayable() && component.isVisible() &&
component.isEnabled() && component.isFocusable())) {
temporaryLostComponent = component;
} else {
temporaryLostComponent = null;
}
return previousComp;
}
public Window getOwner() {
return (Window)parent;
}
} // 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;
/*
* JDK 1.1 serialVersionUID
*/
static final long serialVersionUID = 2491878825643557906L;
}