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Window.javaAPI DocJava SE 5 API86762Fri Aug 26 14:56:46 BST 2005java.awt

Window

public class Window extends Container implements Accessible
A Window object is a top-level window with no borders and no menubar. The default layout for a window is 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 Window on a different screen device by constructing the Window with {@link #Window(Window, GraphicsConfiguration)}. The GraphicsConfiguration object is one of the 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.

Diagram shows virtual device containing 4 physical screens. Primary physical screen shows coords (0,0), other screen shows (-80,-100).

In such an environment, when calling setLocation, you must pass a virtual coordinate to this method. Similarly, calling getLocationOnScreen on a Window returns virtual device coordinates. Call the getBounds method of a GraphicsConfiguration to find its origin in the virtual coordinate system.

The following code sets the location of a Window at (10, 10) relative to the origin of the physical screen of the corresponding GraphicsConfiguration. If the bounds of the GraphicsConfiguration is not taken into account, the 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 GraphicsConfiguration.

Window w = new Window(Window owner, GraphicsConfiguration gc);
Rectangle bounds = gc.getBounds();
w.setLocation(10 + bounds.x, 10 + bounds.y);

Note: the location and size of top-level windows (including Windows, Frames, and Dialogs) are under the control of the desktop's window management system. Calls to setLocation, setSize, and 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 Window in a way that more closely matches the desktop settings. Due to the asynchronous nature of native event handling, the results returned by getBounds, getLocation, getLocationOnScreen, and 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.

Windows are capable of generating the following WindowEvents: WindowOpened, WindowClosed, WindowGainedFocus, WindowLostFocus.

version
1.210, 03/03/05
author
Sami Shaio
author
Arthur van Hoff
see
WindowEvent
see
#addWindowListener
see
java.awt.BorderLayout
since
JDK1.0

Fields Summary
String
warningString
This represents the warning message that is to be displayed in a non secure window. ie : a window that has a security manager installed for which calling SecurityManager.checkTopLevelWindow() is false. This message can be displayed anywhere in the window.
private transient Component
temporaryLostComponent
Holds the reference to the component which last had focus in this window before it lost focus.
static boolean
systemSyncLWRequests
boolean
syncLWRequests
transient boolean
beforeFirstShow
static final int
OPENED
int
state
An Integer value representing the Window State.
private boolean
alwaysOnTop
A boolean value representing Window always-on-top state
transient Vector
ownedWindowList
A vector containing all the windows this window currently owns.
private transient WeakReference
weakThis
private transient boolean
showWithParent
transient WindowListener
windowListener
transient WindowStateListener
windowStateListener
transient WindowFocusListener
windowFocusListener
transient InputContext
inputContext
private transient Object
inputContextLock
private FocusManager
focusMgr
Unused. Maintained for serialization backward-compatibility.
private boolean
focusableWindowState
Indicates whether this Window can become the focused Window.
private static final String
base
private static int
nameCounter
private static final long
serialVersionUID
private static final sun.awt.DebugHelper
dbg
private static final boolean
locationByPlatformProp
private transient boolean
modalExcluded
Indicates whether this Window is modal excluded, i. e. is not blocked by modal dialogs
private int
windowSerializedDataVersion
The window serialized data version.
private boolean
locationByPlatform
Constructors Summary
Window(GraphicsConfiguration gc)
Constructs a new window in default size with the specified GraphicsConfiguration.

If there is a security manager, this method first calls the security manager's checkTopLevelWindow method with this as its argument to determine whether or not the window must be displayed with a warning banner.

param
gc the GraphicsConfiguration of the target screen device. If gc is null, the system default GraphicsConfiguration is assumed.
exception
IllegalArgumentException if gc is not from a screen device. This exception is always thrown when GraphicsEnvironment.isHeadless() returns true.
see
java.awt.GraphicsEnvironment#isHeadless
see
java.lang.SecurityManager#checkTopLevelWindow


     
        /* ensure that the necessary native libraries are loaded */
	Toolkit.loadLibraries();
        if (!GraphicsEnvironment.isHeadless()) {
            initIDs();
        }
        
        String s = (String) java.security.AccessController.doPrivileged(
            new GetPropertyAction("java.awt.syncLWRequests"));
        systemSyncLWRequests = (s != null && s.equals("true"));
        s = (String) java.security.AccessController.doPrivileged(
            new GetPropertyAction("java.awt.Window.locationByPlatform"));
        locationByPlatformProp = (s != null && s.equals("true"));
    
        init(gc);
    
Window()
Constructs a new window in the default size.

First, if there is a security manager, its checkTopLevelWindow method is called with this as its argument to see if it's ok to display the window without a warning banner. If the default implementation of checkTopLevelWindow is used (that is, that method is not overriden), then this results in a call to the security manager's checkPermission method with an AWTPermission("showWindowWithoutWarningBanner") permission. It that method raises a SecurityException, checkTopLevelWindow returns false, otherwise it returns true. If it returns false, a warning banner is created.

exception
HeadlessException if GraphicsEnvironment.isHeadless() returns true
see
java.awt.GraphicsEnvironment#isHeadless
see
java.lang.SecurityManager#checkTopLevelWindow

        GraphicsEnvironment.checkHeadless();
        init((GraphicsConfiguration)null);
    
public Window(Frame owner)
Constructs a new invisible window with the specified Frame as its owner. The Window will not be focusable unless its owner is showing on the screen.

If there is a security manager, this method first calls the security manager's checkTopLevelWindow method with this as its argument to determine whether or not the window must be displayed with a warning banner.

param
owner the Frame to act as owner
exception
IllegalArgumentException if the owner's GraphicsConfiguration is not from a screen device
exception
java.lang.IllegalArgumentException if owner is null; this exception is always thrown when GraphicsEnvironment.isHeadless returns true
see
java.awt.GraphicsEnvironment#isHeadless
see
java.lang.SecurityManager#checkTopLevelWindow
see
#isShowing

        this(owner == null ? (GraphicsConfiguration)null :
            owner.getGraphicsConfiguration());
	ownedInit(owner);
    
public Window(Window owner)
Constructs a new invisible window with the specified Window as its owner. The Window will not be focusable unless its nearest owning Frame or Dialog is showing on the screen.

If there is a security manager, this method first calls the security manager's checkTopLevelWindow method with this as its argument to determine whether or not the window must be displayed with a warning banner.

param
owner the Window to act as owner
exception
IllegalArgumentException if the owner's GraphicsConfiguration is not from a screen device
exception
java.lang.IllegalArgumentException if owner is null. This exception is always thrown when GraphicsEnvironment.isHeadless() returns true.
see
java.awt.GraphicsEnvironment#isHeadless
see
java.lang.SecurityManager#checkTopLevelWindow
see
#isShowing
since
1.2

        this(owner == null ? (GraphicsConfiguration)null :
            owner.getGraphicsConfiguration());
	ownedInit(owner);
    
public Window(Window owner, GraphicsConfiguration gc)
Constructs a new invisible window with the specified window as its owner and a GraphicsConfiguration of a screen device. The Window will not be focusable unless its nearest owning Frame or Dialog is showing on the screen.

If there is a security manager, this method first calls the security manager's checkTopLevelWindow method with this as its argument to determine whether or not the window must be displayed with a warning banner.

param
owner the window to act as owner
param
gc the GraphicsConfiguration of the target screen device; if gc is null, the system default GraphicsConfiguration is assumed
throws
IllegalArgumentException if owner is null
throws
IllegalArgumentException if gc is not from a screen device; this exception is always thrown when GraphicsEnvironment.isHeadless returns true
see
java.awt.GraphicsEnvironment#isHeadless
see
java.lang.SecurityManager#checkTopLevelWindow
see
GraphicsConfiguration#getBounds
see
#isShowing
since
1.3

        this(gc);
	ownedInit(owner);
    
Methods Summary
public voidaddNotify()
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
JDK1.0

	synchronized (getTreeLock()) {
	    Container parent = this.parent;
	    if (parent != null && parent.getPeer() == null) {
	        parent.addNotify();
	    }

	    if (peer == null)
		peer = getToolkit().createWindow(this);
	    super.addNotify();
	}
    
voidaddOwnedWindow(java.lang.ref.WeakReference 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);
		}
	    }
	}
    
public voidaddPropertyChangeListener(java.beans.PropertyChangeListener listener)
Adds a PropertyChangeListener to the listener list. The listener is registered for all bound properties of this class, including the following:
  • this Window's font ("font")
  • this Window's background color ("background")
  • this Window's foreground color ("foreground")
  • this Window's focusability ("focusable")
  • this Window's focus traversal keys enabled state ("focusTraversalKeysEnabled")
  • this Window's Set of FORWARD_TRAVERSAL_KEYS ("forwardFocusTraversalKeys")
  • this Window's Set of BACKWARD_TRAVERSAL_KEYS ("backwardFocusTraversalKeys")
  • this Window's Set of UP_CYCLE_TRAVERSAL_KEYS ("upCycleFocusTraversalKeys")
  • this Window's Set of DOWN_CYCLE_TRAVERSAL_KEYS ("downCycleFocusTraversalKeys")
  • this Window's focus traversal policy ("focusTraversalPolicy")
  • this Window's focusable Window state ("focusableWindowState")
  • this Window's always-on-top state("alwaysOnTop")
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)

	super.addPropertyChangeListener(listener);
    
public voidaddPropertyChangeListener(java.lang.String propertyName, java.beans.PropertyChangeListener listener)
Adds a PropertyChangeListener to the listener list for a specific property. The specified property may be user-defined, or one of the following:
  • this Window's font ("font")
  • this Window's background color ("background")
  • this Window's foreground color ("foreground")
  • this Window's focusability ("focusable")
  • this Window's focus traversal keys enabled state ("focusTraversalKeysEnabled")
  • this Window's Set of FORWARD_TRAVERSAL_KEYS ("forwardFocusTraversalKeys")
  • this Window's Set of BACKWARD_TRAVERSAL_KEYS ("backwardFocusTraversalKeys")
  • this Window's Set of UP_CYCLE_TRAVERSAL_KEYS ("upCycleFocusTraversalKeys")
  • this Window's Set of DOWN_CYCLE_TRAVERSAL_KEYS ("downCycleFocusTraversalKeys")
  • this Window's focus traversal policy ("focusTraversalPolicy")
  • this Window's focusable Window state ("focusableWindowState")
  • this Window's always-on-top state("alwaysOnTop")
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

	super.addPropertyChangeListener(propertyName, listener);
    
public synchronized voidaddWindowFocusListener(java.awt.event.WindowFocusListener l)
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.

param
l the window focus listener
see
#removeWindowFocusListener
see
#getWindowFocusListeners

        if (l == null) {
            return;
        }
        windowFocusListener = AWTEventMulticaster.add(windowFocusListener, l);
        newEventsOnly = true;
    
public synchronized voidaddWindowListener(java.awt.event.WindowListener l)
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.

param
l the window listener
see
#removeWindowListener
see
#getWindowListeners

	if (l == null) {
	    return;
	}
        newEventsOnly = true;
        windowListener = AWTEventMulticaster.add(windowListener, l);
    
public synchronized voidaddWindowStateListener(java.awt.event.WindowStateListener l)
Adds the specified window state listener to receive window events from this window. If l is null, no exception is thrown and no action is performed.

param
l the window state listener
see
#removeWindowStateListener
see
#getWindowStateListeners
since
1.4

        if (l == null) {
            return;
        }
        windowStateListener = AWTEventMulticaster.add(windowStateListener, l);
        newEventsOnly = true;
    
voidadjustDecendantsOnParent(int num)

        // do nothing since parent == owner and we shouldn't 
        // ajust counter on owner
    
voidadjustListeningChildrenOnParent(long mask, int num)

    
public voidapplyResourceBundle(java.util.ResourceBundle rb)

deprecated
As of J2SE 1.4, replaced by {@link Component#applyComponentOrientation Component.applyComponentOrientation}.

        applyComponentOrientation(ComponentOrientation.getOrientation(rb));
    
public voidapplyResourceBundle(java.lang.String rbName)

deprecated
As of J2SE 1.4, replaced by {@link Component#applyComponentOrientation Component.applyComponentOrientation}.

        applyResourceBundle(ResourceBundle.getBundle(rbName));
    
booleancanContainFocusOwner(java.awt.Component focusOwnerCandidate)
Checks whether this window can contain focus owner. Verifies that it is focusable and as container it can container focus owner.

since
1.5

        return super.canContainFocusOwner(focusOwnerCandidate) && isFocusableWindow();
    
final voidclearMostRecentFocusOwnerOnHide()

        /* do nothing */
    
voidconnectOwnedWindow(java.awt.Window child)

        WeakReference weakChild = new WeakReference(child);
	child.weakThis = weakChild;
	child.parent = this;
	addOwnedWindow(weakChild);
    
java.lang.StringconstructComponentName()
Construct a name for this component. Called by getName() when the name is null.

        synchronized (getClass()) {
	    return base + nameCounter++;
	}
    
public voidcreateBufferStrategy(int numBuffers)
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 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
exception
IllegalArgumentException if numBuffers is less than 1.
exception
IllegalStateException if the component is not displayable
see
#isDisplayable
see
#getBufferStrategy
since
1.4

        super.createBufferStrategy(numBuffers);
    
public voidcreateBufferStrategy(int numBuffers, java.awt.BufferCapabilities caps)
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 null
exception
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.
exception
IllegalArgumentException if numBuffers is less than 1, or if caps is null
see
#getBufferStrategy
since
1.4

        super.createBufferStrategy(numBuffers, caps);
    
voiddeliverMouseWheelToAncestor(java.awt.event.MouseWheelEvent e)
Overridden from Component. Top-level Windows should not propagate a MouseWheelEvent beyond themselves into their owning Windows.

voiddispatchEventImpl(java.awt.AWTEvent e)
Dispatches an event to this window or one of its sub components.

param
e the event

	if (e.getID() == ComponentEvent.COMPONENT_RESIZED) {
	    invalidate();
	    validate();
	}
	super.dispatchEventImpl(e);
    
booleandispatchMouseWheelToAncestor(java.awt.event.MouseWheelEvent e)
Overridden from Component. Top-level Windows don't dispatch to ancestors

return false;
public voiddispose()
Releases all of the native screen resources used by this Window, its subcomponents, and all of its owned children. That is, the resources for these Components will be destroyed, any memory they consume will be returned to the OS, and they will be marked as undisplayable.

The Window and its subcomponents can be made displayable again by rebuilding the native resources with a subsequent call to pack or show. The states of the recreated Window and its subcomponents will be identical to the states of these objects at the point where the 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 AWT Threading Issues for more information.

see
Component#isDisplayable
see
#pack
see
#show

        doDispose();
    
voiddisposeImpl()

        dispose();
        if (getPeer() != null) {
            doDispose();
        }
    
voiddoDispose()

    class DisposeAction implements Runnable {
        public void run() {
	    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();
        }
    }
        DisposeAction action = new DisposeAction();
	if (EventQueue.isDispatchThread()) {
	    action.run();
	}
	else {
	    try {
	        EventQueue.invokeAndWait(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.
        postWindowEvent(WindowEvent.WINDOW_CLOSED);
    
booleaneventEnabled(java.awt.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);
    
protected voidfinalize()
Disposes of the input methods and context, and removes this Window from the GUI hierarchy. Subclasses that override this method should call super.finalize().

        // We have to remove the (hard) reference to weakThis in the
        // parent's ownedWindowList, otherwise the WeakReference
        // instance that points to this Window will never get garbage
        // collected.
	if (parent != null) {
	    ((Window)parent).removeOwnedWindow(weakThis);
	}
	super.finalize();
    
public javax.accessibility.AccessibleContextgetAccessibleContext()
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

        if (accessibleContext == null) {
            accessibleContext = new AccessibleAWTWindow();
        }
        return accessibleContext;
    
public java.awt.image.BufferStrategygetBufferStrategy()

return
the buffer strategy used by this component
see
#createBufferStrategy
since
1.4

        return super.getBufferStrategy();
    
public final java.awt.ContainergetFocusCycleRootAncestor()
Always returns null because Windows have no ancestors; they represent the top of the Component hierarchy.

return
null
see
Container#isFocusCycleRoot()
since
1.4

	return null;
    
public java.awt.ComponentgetFocusOwner()
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

	return (isFocused())
	    ? KeyboardFocusManager.getCurrentKeyboardFocusManager().
	          getFocusOwner()
	    : null;
    
public java.util.SetgetFocusTraversalKeys(int id)
Gets a focus traversal key for this Window. (See 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

	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 booleangetFocusableWindowState()
Returns whether this Window can become the focused Window if it meets the other requirements outlined in isFocusableWindow. If this method returns false, then isFocusableWindow will return false as well. If this method returns true, then isFocusableWindow may return true or 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 true.

return
whether this Window can be the focused Window
see
#isFocusableWindow
see
#setFocusableWindowState
see
#isShowing
see
Component#setFocusable
since
1.4

        return focusableWindowState;
    
public java.awt.GraphicsConfigurationgetGraphicsConfiguration()
This method returns the GraphicsConfiguration used by this Window.

		//NOTE: for multiscreen, this will need to take into account
		//which screen the window is on/mostly on instead of returning the
		//default or constructor argument config.
        synchronized(getTreeLock()) {
            if (graphicsConfig == null  && !GraphicsEnvironment.isHeadless()) {
                graphicsConfig =
                    GraphicsEnvironment. getLocalGraphicsEnvironment().
                    getDefaultScreenDevice().
                    getDefaultConfiguration();
            }
            return graphicsConfig;
	    }
    
public java.awt.im.InputContextgetInputContext()
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

        if (inputContext == null) {
            synchronized (inputContextLock) {
                if (inputContext == null) {
                    inputContext = InputContext.getInstance();
                }
            }
        }
        return inputContext;
    
public T[]getListeners(java.lang.Class listenerType)
Returns an array of all the objects currently registered as FooListeners upon this Window. FooListeners are registered using the addFooListener method.

You can specify the listenerType argument with a class literal, such as FooListener.class. For example, you can query a Window w for its window listeners with the following code:

WindowListener[] wls = (WindowListener[])(w.getListeners(WindowListener.class));
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 java.util.EventListener
return
an array of all objects registered as FooListeners on this window, or an empty array if no such listeners have been added
exception
ClassCastException if listenerType doesn't specify a class or interface that implements java.util.EventListener
see
#getWindowListeners
since
1.3

	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);
    
public java.util.LocalegetLocale()
Gets the 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
JDK1.1

      if (this.locale == null) {
	return Locale.getDefault();
      }
      return this.locale;
    
public java.awt.ComponentgetMostRecentFocusOwner()
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 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

	if (isFocused()) {
	    return getFocusOwner();
	} else {
	    Component mostRecent =
		KeyboardFocusManager.getMostRecentFocusOwner(this);
	    if (mostRecent != null) {
		return mostRecent;
	    } else {
		return (isFocusableWindow())
		    ? getFocusTraversalPolicy().getInitialComponent(this)
		    : null;
	    }
        }
    
public java.awt.Window[]getOwnedWindows()
Return an array containing all the windows this window currently owns.

since
1.2

        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] = (Window) (((WeakReference)
		    (ownedWindowList.elementAt(i))).get());

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

	    if (fullSize != realSize) {
	        realCopy = new Window[realSize];
		System.arraycopy(fullCopy, 0, realCopy, 0, realSize);
	    } else {
	        realCopy = fullCopy;
	    }
	}

        return realCopy;
    
public java.awt.WindowgetOwner()
Returns the owner of this window.

since
1.2

        return (Window)parent;
    
java.awt.ComponentgetTemporaryLostComponent()

        return temporaryLostComponent;
    
public java.awt.ToolkitgetToolkit()
Returns the toolkit of this frame.

return
the toolkit of this window.
see
Toolkit
see
Toolkit#getDefaultToolkit
see
Component#getToolkit

	return Toolkit.getDefaultToolkit();
    
public final java.lang.StringgetWarningString()
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 checkTopLevelWindow method returns false when this window is passed to it as an argument.

If the window is secure, then getWarningString returns null. If the window is insecure, this method checks for the system property awt.appletWarning and returns the string value of that property.

return
the warning string for this window.
see
java.lang.SecurityManager#checkTopLevelWindow(java.lang.Object)

	return warningString;
    
public synchronized java.awt.event.WindowFocusListener[]getWindowFocusListeners()
Returns an array of all the window focus listeners registered on this window.

return
all of this window's WindowFocusListeners or an empty array if no window focus listeners are currently registered
see
#addWindowFocusListener
see
#removeWindowFocusListener
since
1.4

        return (WindowFocusListener[])(getListeners(WindowFocusListener.class));
    
public synchronized java.awt.event.WindowListener[]getWindowListeners()
Returns an array of all the window listeners registered on this window.

return
all of this window's WindowListeners or an empty array if no window listeners are currently registered
see
#addWindowListener
see
#removeWindowListener
since
1.4

        return (WindowListener[])(getListeners(WindowListener.class));
    
public synchronized java.awt.event.WindowStateListener[]getWindowStateListeners()
Returns an array of all the window state listeners registered on this window.

return
all of this window's WindowStateListeners or an empty array if no window state listeners are currently registered
see
#addWindowStateListener
see
#removeWindowStateListener
since
1.4

        return (WindowStateListener[])(getListeners(WindowStateListener.class));
    
public voidhide()

deprecated
As of JDK 5, replaced by {@link Component#setVisible(boolean) Component.setVisible(boolean)}.

        synchronized(ownedWindowList) {
	    for (int i = 0; i < ownedWindowList.size(); i++) {
	        Window child = (Window) (((WeakReference)
		    (ownedWindowList.elementAt(i))).get());
		if ((child != null) && child.visible) {
                    child.hide();
                    child.showWithParent = true;
                }
	    }
	}
	super.hide();
    
private voidinit(java.awt.GraphicsConfiguration gc)

        if (GraphicsEnvironment.isHeadless()) {
            throw new IllegalArgumentException("headless environment");
        }

        syncLWRequests = systemSyncLWRequests;

	setWarningString();
	this.cursor = Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
	this.visible = false;
        if (gc == null) {
            this.graphicsConfig =
                GraphicsEnvironment.getLocalGraphicsEnvironment().
             getDefaultScreenDevice().getDefaultConfiguration();
        } else {
            this.graphicsConfig = gc;
        }
        if (graphicsConfig.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 = graphicsConfig.getBounds();
        Insets screenInsets = getToolkit().getScreenInsets(graphicsConfig);          
        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);
        }
    
private static native voidinitIDs()
Initialize JNI field and method IDs for fields that may be accessed from C.

public booleanisActive()
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

	return (KeyboardFocusManager.getCurrentKeyboardFocusManager().
		getActiveWindow() == this);
    
public final booleanisAlwaysOnTop()
Returns whether this window is an always-on-top window.

return
true, if the window is in always-on-top state, false otherwise
see
#setAlwaysOnTop
since
1.5

        return alwaysOnTop;
    
public final booleanisFocusCycleRoot()
Always returns true because all Windows must be roots of a focus traversal cycle.

return
true
see
#setFocusCycleRoot
see
Container#setFocusTraversalPolicy
see
Container#getFocusTraversalPolicy
since
1.4

	return true;
    
public final booleanisFocusableWindow()
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 true. For a Window which is not a Frame or Dialog to be focusable, its focusable Window state must be set to 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
true if this Window can be the focused Window; false otherwise
see
#getFocusableWindowState
see
#setFocusableWindowState
see
#isShowing
see
Component#isFocusable
since
1.4

        // 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 booleanisFocused()
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

	return (KeyboardFocusManager.getCurrentKeyboardFocusManager().
		getGlobalFocusedWindow() == this);
    
public booleanisLocationByPlatform()
Returns true if this Window will appear at the default location for the native windowing system the next time this Window is made visible. This method always returns false if the Window is showing on the screen.

return
whether this Window will appear at the default location
see
#setLocationByPlatform
see
#isShowing
since
1.5

        synchronized (getTreeLock()) {
            return locationByPlatform;
        }
    
public booleanisShowing()
Checks if this Window is showing on screen.

see
Component#setVisible

	return visible;
    
private voidownedInit(java.awt.Window owner)

	if (owner == null) {
	    throw new IllegalArgumentException("null owner window");
	}	
	this.parent = owner;
	this.weakThis = new WeakReference(this);
	owner.addOwnedWindow(weakThis);
        modalExcluded = owner.modalExcluded;
    
public voidpack()
Causes this Window to be sized to fit the preferred size and layouts of its subcomponents. If the window and/or its owner are not yet displayable, both are made displayable before calculating the preferred size. The Window will be validated after the preferredSize is calculated.

see
Component#isDisplayable

	Container parent = this.parent;
	if (parent != null && parent.getPeer() == null) {
	    parent.addNotify();
	}
	if (peer == null) {
	    addNotify();
	}
        Dimension newSize = getPreferredSize();
        if (peer != null) {
            setClientSize(newSize.width, newSize.height);
        }

        if(beforeFirstShow) {
            isPacked = true;
        }

	validate();
    
public booleanpostEvent(java.awt.Event e)

deprecated
As of JDK version 1.1 replaced by dispatchEvent(AWTEvent).

        if (handleEvent(e)) {
            e.consume();
            return true;
        }
        return false;
    
voidpostProcessKeyEvent(java.awt.event.KeyEvent e)

	// Do nothing
    
synchronized voidpostWindowEvent(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);
        }
    
voidpreProcessKeyEvent(java.awt.event.KeyEvent e)
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 System.out.

param
e the keyboard event

        // Dump the list of child windows to System.out.
        if (e.isActionKey() && e.getKeyCode() == KeyEvent.VK_F1 &&
            e.isControlDown() && e.isShiftDown() && 
            e.getID() == KeyEvent.KEY_PRESSED) {
            list(System.out, 0);
        }
    
protected voidprocessEvent(java.awt.AWTEvent e)
Processes events on this window. If the event is an WindowEvent, it invokes the processWindowEvent method, else it invokes its superclass's processEvent.

Note that if the event parameter is null the behavior is unspecified and may result in an exception.

param
e the event

        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);
                default:
                    break;
            }
            return;
        }
	super.processEvent(e);
    
protected voidprocessWindowEvent(java.awt.event.WindowEvent 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 WindowListener object is registered via addWindowListener
  • Window events are enabled via enableEvents

Note that if the event parameter is null the behavior is unspecified and may result in an exception.

param
e the window event
see
Component#enableEvents

        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;
            }
        }
    
protected voidprocessWindowFocusEvent(java.awt.event.WindowEvent e)
Processes window focus event occuring 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:
  • a WindowFocusListener is registered via addWindowFocusListener
  • Window focus events are enabled via enableEvents

Note that if the event parameter is null the behavior is unspecified and may result in an exception.

param
e the window focus event
see
Component#enableEvents

        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;
            }
        }
    
protected voidprocessWindowStateEvent(java.awt.event.WindowEvent e)
Processes window state event occuring on this window by dispatching them to any registered 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:
  • a WindowStateListener is registered via addWindowStateListener
  • window state events are enabled via enableEvents

Note that if the event parameter is 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

        WindowStateListener listener = windowStateListener;
	if (listener != null) {
	    switch (e.getID()) {
		case WindowEvent.WINDOW_STATE_CHANGED:
		    listener.windowStateChanged(e);
		    break;
		default:
		    break;
	    }
	}
    
private voidreadObject(java.io.ObjectInputStream s)
Reads the ObjectInputStream and an optional list of listeners to receive various events fired by the component; also reads a list of (possibly null) child windows. Unrecognized keys or values will be ignored.

param
s the ObjectInputStream to read
exception
HeadlessException if GraphicsEnvironment.isHeadless returns true
see
java.awt.GraphicsEnvironment#isHeadless
see
#writeObject

      GraphicsEnvironment.checkHeadless();
      s.defaultReadObject();

      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;
      }
  
      // 1.4 doesn't use this field, so just null it out.
      focusMgr = null;
  
      ownedWindowList = new Vector();

      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();
	  }
      }
      catch (OptionalDataException e) {
	  // 1.1 serialized form
	  // ownedWindowList will be updated by Frame.readObject
      }

      setWarningString();
      inputContextLock = new Object();

      // Deserialized Windows are not yet visible.
      visible = false;
    
voidremoveOwnedWindow(java.lang.ref.WeakReference weakWindow)

        if (weakWindow != null) {
	    // synchronized block not required since removeElement is
	    // already synchronized
	    ownedWindowList.removeElement(weakWindow);
	}
    
public synchronized voidremoveWindowFocusListener(java.awt.event.WindowFocusListener 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.

param
l the window focus listener
see
#addWindowFocusListener
see
#getWindowFocusListeners

        if (l == null) {
            return;
        }
        windowFocusListener = AWTEventMulticaster.remove(windowFocusListener, l);
    
public synchronized voidremoveWindowListener(java.awt.event.WindowListener l)
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.

param
l the window listener
see
#addWindowListener
see
#getWindowListeners

	if (l == null) {
	    return;
	}
        windowListener = AWTEventMulticaster.remove(windowListener, l);
    
public synchronized voidremoveWindowStateListener(java.awt.event.WindowStateListener l)
Removes the specified window state 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.

param
l the window state listener
see
#addWindowStateListener
see
#getWindowStateListeners
since
1.4

        if (l == null) {
            return;
        }
        windowStateListener = AWTEventMulticaster.remove(windowStateListener, l);
    
voidresetGC()
Reset this Window's GraphicsConfiguration to match its peer.

        if (!GraphicsEnvironment.isHeadless()) {
            // use the peer's GC 
            setGCFromPeer();
            // if it's still null, use the default
            if (graphicsConfig == null) {
                graphicsConfig = GraphicsEnvironment.
                    getLocalGraphicsEnvironment().
                    getDefaultScreenDevice().
                    getDefaultConfiguration();
            }
            if (dbg.on) {
                dbg.println("+ Window.resetGC(): new GC is \n+ " + graphicsConfig + "\n+ this is " + this);
            }
        }
    
public final voidsetAlwaysOnTop(boolean alwaysOnTop)
Changes the always-on-top window state. An always-on-top window is a window that stays above all other windows except maybe other always-on-top windows. If there are several always-on-top windows the order in which they stay relative to each other is not specified and is platform dependent.

If some other window already is always-on-top then the relative order between these windows is unspecified (depends on platform). No window can be brought to be over always-on-top window except maybe another always-on-top window.

All owned windows of an always-on-top window automatically become always-on-top windows. If a window ceases to be always-on-top its owned windows cease to be always-on-top.

When an always-on-top window is sent {@link #toBack toBack} its always-on-top state is set to false.

This method makes the window always-on-top if alwaysOnTop is true. If the window is visible, this includes bringing window toFront, then "sticking" it to the top-most position. If the window is not visible it does nothing other than setting the always-on-top property. If later the window is shown, it will be always-on-top. If the Window is already always-on-top, this call does nothing.

If alwaysOnTop is false this method changes the state from always-on-top to normal. The window remains top-most but its z-order can be changed in the normal way as for any other window. Does nothing if this Window is not always-on-top. Has no effect on relative z-order of windows if there are no other always-on-top windows.

Note: some platforms might not support always-on-top windows. There is no public API to detect if the platform supports always-on-top at runtime.

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 new value of always-on-top state of the window
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
since
1.5

        SecurityManager security = System.getSecurityManager();
        if (security != null) {
            security.checkPermission(SecurityConstants.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
        }

        boolean oldAlwaysOnTop;
        synchronized(this) {
            oldAlwaysOnTop = this.alwaysOnTop;
            this.alwaysOnTop = alwaysOnTop;
        }
        if (oldAlwaysOnTop != alwaysOnTop ) {
            WindowPeer peer = (WindowPeer)this.peer;
            synchronized(getTreeLock()) {
                if (peer != null) {
                    peer.updateAlwaysOnTop();
                }
            }
            firePropertyChange("alwaysOnTop", oldAlwaysOnTop, alwaysOnTop);
        }        
    
public voidsetBounds(int x, int y, int width, int height)

since
1.5
see
#setLocationByPlatform
see
#isLocationByPlatform

        synchronized (getTreeLock()) {
            if (getBoundsOp() == ComponentPeer.SET_LOCATION ||
                getBoundsOp() == ComponentPeer.SET_BOUNDS) 
            {
                locationByPlatform = false;
            }
            super.setBounds(x, y, width, height);
        }
    
voidsetClientSize(int w, int h)

    	synchronized (getTreeLock()) {
    	    setBoundsOp(ComponentPeer.SET_CLIENT_SIZE);
    	    setBounds(x, y, w, h);
    	}
    
public voidsetCursor(java.awt.Cursor cursor)
Set the cursor image to a specified cursor.

param
cursor One of the constants defined by the 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
JDK1.1

        if (cursor == null) {
            cursor = Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
        }
        super.setCursor(cursor);
    
public final voidsetFocusCycleRoot(boolean focusCycleRoot)
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 voidsetFocusableWindowState(boolean focusableWindowState)
Sets whether this Window can become the focused Window if it meets the other requirements outlined in isFocusableWindow. If this Window's focusable Window state is set to false, then isFocusableWindow will return false. If this Window's focusable Window state is set to true, then isFocusableWindow may return true or 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 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 Window can have a delayed effect on some platforms — the actual change may happen only when the Window becomes hidden and then visible again. To ensure consistent behavior across platforms, set the Window's focusable state when the 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

	boolean oldFocusableWindowState;
	synchronized (this) {
	    oldFocusableWindowState = this.focusableWindowState;
	    this.focusableWindowState = focusableWindowState;
	}
	firePropertyChange("focusableWindowState", oldFocusableWindowState,
			   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();
	}
    
public voidsetLocationByPlatform(boolean locationByPlatform)
Sets whether this Window should appear at the default location for the native windowing system or at the current location (returned by 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 setVisible, setLocation and setBounds after calling setLocationByPlatform clear this property of the Window.

For example, after the following code is executed:

setLocationByPlatform(true); setVisible(true); boolean flag = isLocationByPlatform();
The window will be shown at platform's default location and flag will be false.

In the following sample:

setLocationByPlatform(true); setLocation(10, 10); boolean flag = isLocationByPlatform(); setVisible(true);
The window will be shown at (10, 10) and flag will be false.

param
locationByPlatform true if this Window should appear at the default location, false if at the current location
throws
IllegalComponentStateException if the window is showing on screen and locationByPlatform is true.
see
#setLocation
see
#isShowing
see
#setVisible
see
#isLocationByPlatform
see
java.lang.System#getProperty(String)
since
1.5


    
                                                                                                                                                                                                                                         
        
        synchronized (getTreeLock()) {
            if (locationByPlatform && isShowing()) {
                throw new IllegalComponentStateException("The window is showing on screen.");
            }
            this.locationByPlatform = locationByPlatform;
        }
    
public voidsetLocationRelativeTo(java.awt.Component c)
Sets the location of the window relative to the specified component. If the component is not currently showing, or c is null, the window is centered on the screen. If the bottom of the component is offscreen, the window is placed to the side of the 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 visa versa.

param
c the component in relation to which the window's location is determined
since
1.4

        Container root=null;

        if (c != null) {
            if (c instanceof Window || c instanceof Applet) {
               root = (Container)c;
            } else {
                Container parent;
                for(parent = c.getParent() ; parent != null ; parent = parent.getParent()) {
                    if (parent instanceof Window || parent instanceof Applet) {
                        root = parent;
                        break;
                    }
                }
            }
        }

        if((c != null && !c.isShowing()) || root == null ||
           !root.isShowing()) {
            Dimension         paneSize = getSize();
            Dimension         screenSize = getToolkit().getScreenSize();

            setLocation((screenSize.width - paneSize.width) / 2,
                        (screenSize.height - paneSize.height) / 2);
        } else {
            Dimension invokerSize = c.getSize();
            Point invokerScreenLocation = c.getLocationOnScreen();

            Rectangle  windowBounds = getBounds();
            int        dx = invokerScreenLocation.x+((invokerSize.width-windowBounds.width)>>1);
            int        dy = invokerScreenLocation.y+((invokerSize.height - windowBounds.height)>>1);
            Rectangle ss = root.getGraphicsConfiguration().getBounds();

            // Adjust for bottom edge being offscreen
            if (dy+windowBounds.height>ss.height) {
                dy = ss.height-windowBounds.height;
                if (invokerScreenLocation.x - ss.x + invokerSize.width / 2 <
                    ss.width / 2) {
                    dx = invokerScreenLocation.x+invokerSize.width;
                }
                else {
                    dx = invokerScreenLocation.x-windowBounds.width;
                }
            }

            // Avoid being placed off the edge of the screen
            if (dx+windowBounds.width > ss.x + ss.width) {
                dx = ss.x + ss.width - windowBounds.width;
            }
            if (dx < ss.x) dx = 0;
            if (dy < ss.y) dy = 0;

            setLocation(dx, dy);
        }
    
java.awt.ComponentsetTemporaryLostComponent(java.awt.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;
    
private voidsetWarningString()

	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"));
	    }
	}
    
public voidshow()

deprecated
As of JDK 5, replaced by {@link Component#setVisible(boolean) Component.setVisible(boolean)}.

	if (peer == null) {
	    addNotify();
	}
	validate();

	if (visible) {
	    toFront();
	} else {	    
            beforeFirstShow = false;
	    super.show();
            locationByPlatform = false;
	    for (int i = 0; i < ownedWindowList.size(); i++) {
                Window child = (Window) (((WeakReference)
                    (ownedWindowList.elementAt(i))).get());
                        if ((child != null) && child.showWithParent) {
                            child.show();
                            child.showWithParent = false;
                        }       // endif
            }   // endfor
	}
        
        // If first time shown, generate WindowOpened event
        if ((state & OPENED) == 0) {
            postWindowEvent(WindowEvent.WINDOW_OPENED);
            state |= OPENED;
        }
    
public voidtoBack()
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

        if (visible) {
	    WindowPeer peer = (WindowPeer)this.peer;
	    if (peer != null) {
	        peer.toBack();
	    }
	}
    
public voidtoFront()
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.

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 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. 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.

see
#toBack

        if (visible) {
	    WindowPeer peer = (WindowPeer)this.peer;
	    if (peer != null) {
	        peer.toFront();
	    }
	}
    
private voidwriteObject(java.io.ObjectOutputStream s)
Writes default serializable fields to stream. Writes a list of serializable WindowListeners and WindowFocusListeners as optional data. Writes a list of child windows as optional data.

param
s the ObjectOutputStream to write
serialData
null terminated sequence of 0 or more pairs; the pair consists of a String and and Object; the String indicates the type of object and is one of the following: windowListenerK indicating a WindowListener object; windowFocusWindowK indicating a WindowFocusListener object; ownedWindowK indicating a child 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)


                                                                                                                                      
          
        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 = (Window) (((WeakReference)
	            (ownedWindowList.elementAt(i))).get());
		if (child != null) {
		    s.writeObject(ownedWindowK);
		    s.writeObject(child);
		}
	    }
	}
	s.writeObject(null);