/*
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*
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*
*
*/
package javax.swing;
import java.awt.
AWTEvent;
import java.awt.
BorderLayout;
import java.awt.
Component;
import java.awt.
Container;
import java.awt.
Frame;
import java.awt.
Graphics;
import java.awt.
GraphicsConfiguration;
import java.awt.
HeadlessException;
import java.awt.
Image;
import java.awt.
LayoutManager;
import java.awt.event.
WindowEvent;
import javax.accessibility.
Accessible;
import javax.accessibility.
AccessibleContext;
import javax.accessibility.
AccessibleState;
import javax.accessibility.
AccessibleStateSet;
/**
* An extended version of <code>java.awt.Frame</code> that adds support for
* the JFC/Swing component architecture.
* You can find task-oriented documentation about using <code>JFrame</code>
* in <em>The Java Tutorial</em>, in the section
* <a
href="https://docs.oracle.com/javase/tutorial/uiswing/components/frame.html">How to Make Frames</a>.
*
* <p>
* The <code>JFrame</code> class is slightly incompatible with <code>Frame</code>.
* Like all other JFC/Swing top-level containers,
* a <code>JFrame</code> contains a <code>JRootPane</code> as its only child.
* The <b>content pane</b> provided by the root pane should,
* as a rule, contain
* all the non-menu components displayed by the <code>JFrame</code>.
* This is different from the AWT <code>Frame</code> case.
* As a convenience, the {@code add}, {@code remove}, and {@code setLayout}
* methods of this class are overridden, so that they delegate calls
* to the corresponding methods of the {@code ContentPane}.
* For example, you can add a child component to a frame as follows:
* <pre>
* frame.add(child);
* </pre>
* And the child will be added to the contentPane.
* The content pane will
* always be non-null. Attempting to set it to null will cause the JFrame
* to throw an exception. The default content pane will have a BorderLayout
* manager set on it.
* Refer to {@link javax.swing.RootPaneContainer}
* for details on adding, removing and setting the <code>LayoutManager</code>
* of a <code>JFrame</code>.
* <p>
* Unlike a <code>Frame</code>, a <code>JFrame</code> has some notion of how to
* respond when the user attempts to close the window. The default behavior
* is to simply hide the JFrame when the user closes the window. To change the
* default behavior, you invoke the method
* {@link #setDefaultCloseOperation}.
* To make the <code>JFrame</code> behave the same as a <code>Frame</code>
* instance, use
* <code>setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE)</code>.
* <p>
* For more information on content panes
* and other features that root panes provide,
* see <a
href="https://docs.oracle.com/javase/tutorial/uiswing/components/toplevel.html">Using Top-Level Containers</a> in <em>The Java Tutorial</em>.
* <p>
* In a multi-screen environment, you can create a <code>JFrame</code>
* on a different screen device. See {@link java.awt.Frame} for more
* information.
* <p>
* <strong>Warning:</strong> Swing is not thread safe. For more
* information see <a
* href="package-summary.html#threading">Swing's Threading
* Policy</a>.
* <p>
* <strong>Warning:</strong>
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is
* appropriate for short term storage or RMI between applications running
* the same version of Swing. As of 1.4, support for long term storage
* of all JavaBeans™
* has been added to the <code>java.beans</code> package.
* Please see {@link java.beans.XMLEncoder}.
*
* @see JRootPane
* @see #setDefaultCloseOperation
* @see java.awt.event.WindowListener#windowClosing
* @see javax.swing.RootPaneContainer
*
* @beaninfo
* attribute: isContainer true
* attribute: containerDelegate getContentPane
* description: A toplevel window which can be minimized to an icon.
*
* @author Jeff Dinkins
* @author Georges Saab
* @author David Kloba
*/
public class
JFrame extends
Frame implements
WindowConstants,
Accessible,
RootPaneContainer,
TransferHandler.
HasGetTransferHandler
{
/**
* The exit application default window close operation. If a window
* has this set as the close operation and is closed in an applet,
* a <code>SecurityException</code> may be thrown.
* It is recommended you only use this in an application.
* <p>
* @since 1.3
*/
public static final int
EXIT_ON_CLOSE = 3;
/**
* Key into the AppContext, used to check if should provide decorations
* by default.
*/
private static final
Object defaultLookAndFeelDecoratedKey =
new
StringBuffer("JFrame.defaultLookAndFeelDecorated");
private int
defaultCloseOperation =
HIDE_ON_CLOSE;
/**
* The <code>TransferHandler</code> for this frame.
*/
private
TransferHandler transferHandler;
/**
* The <code>JRootPane</code> instance that manages the
* <code>contentPane</code>
* and optional <code>menuBar</code> for this frame, as well as the
* <code>glassPane</code>.
*
* @see JRootPane
* @see RootPaneContainer
*/
protected
JRootPane rootPane;
/**
* If true then calls to <code>add</code> and <code>setLayout</code>
* will be forwarded to the <code>contentPane</code>. This is initially
* false, but is set to true when the <code>JFrame</code> is constructed.
*
* @see #isRootPaneCheckingEnabled
* @see #setRootPaneCheckingEnabled
* @see javax.swing.RootPaneContainer
*/
protected boolean
rootPaneCheckingEnabled = false;
/**
* Constructs a new frame that is initially invisible.
* <p>
* This constructor sets the component's locale property to the value
* returned by <code>JComponent.getDefaultLocale</code>.
*
* @exception HeadlessException if GraphicsEnvironment.isHeadless()
* returns true.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see Component#setSize
* @see Component#setVisible
* @see JComponent#getDefaultLocale
*/
public
JFrame() throws
HeadlessException {
super();
frameInit();
}
/**
* Creates a <code>Frame</code> in the specified
* <code>GraphicsConfiguration</code> of
* a screen device and a blank title.
* <p>
* This constructor sets the component's locale property to the value
* returned by <code>JComponent.getDefaultLocale</code>.
*
* @param gc the <code>GraphicsConfiguration</code> that is used
* to construct the new <code>Frame</code>;
* if <code>gc</code> is <code>null</code>, the system
* default <code>GraphicsConfiguration</code> is assumed
* @exception IllegalArgumentException if <code>gc</code> is not from
* a screen device. This exception is always thrown when
* GraphicsEnvironment.isHeadless() returns true.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
* @since 1.3
*/
public
JFrame(
GraphicsConfiguration gc) {
super(
gc);
frameInit();
}
/**
* Creates a new, initially invisible <code>Frame</code> with the
* specified title.
* <p>
* This constructor sets the component's locale property to the value
* returned by <code>JComponent.getDefaultLocale</code>.
*
* @param title the title for the frame
* @exception HeadlessException if GraphicsEnvironment.isHeadless()
* returns true.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see Component#setSize
* @see Component#setVisible
* @see JComponent#getDefaultLocale
*/
public
JFrame(
String title) throws
HeadlessException {
super(
title);
frameInit();
}
/**
* Creates a <code>JFrame</code> with the specified title and the
* specified <code>GraphicsConfiguration</code> of a screen device.
* <p>
* This constructor sets the component's locale property to the value
* returned by <code>JComponent.getDefaultLocale</code>.
*
* @param title the title to be displayed in the
* frame's border. A <code>null</code> value is treated as
* an empty string, "".
* @param gc the <code>GraphicsConfiguration</code> that is used
* to construct the new <code>JFrame</code> with;
* if <code>gc</code> is <code>null</code>, the system
* default <code>GraphicsConfiguration</code> is assumed
* @exception IllegalArgumentException if <code>gc</code> is not from
* a screen device. This exception is always thrown when
* GraphicsEnvironment.isHeadless() returns true.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
* @since 1.3
*/
public
JFrame(
String title,
GraphicsConfiguration gc) {
super(
title,
gc);
frameInit();
}
/** Called by the constructors to init the <code>JFrame</code> properly. */
protected void
frameInit() {
enableEvents(
AWTEvent.
KEY_EVENT_MASK |
AWTEvent.
WINDOW_EVENT_MASK);
setLocale(
JComponent.
getDefaultLocale() );
setRootPane(
createRootPane());
setBackground(
UIManager.
getColor("control"));
setRootPaneCheckingEnabled(true);
if (
JFrame.
isDefaultLookAndFeelDecorated()) {
boolean
supportsWindowDecorations =
UIManager.
getLookAndFeel().
getSupportsWindowDecorations();
if (
supportsWindowDecorations) {
setUndecorated(true);
getRootPane().
setWindowDecorationStyle(
JRootPane.
FRAME);
}
}
sun.awt.
SunToolkit.
checkAndSetPolicy(this);
}
/**
* Called by the constructor methods to create the default
* <code>rootPane</code>.
*/
protected
JRootPane createRootPane() {
JRootPane rp = new
JRootPane();
// NOTE: this uses setOpaque vs LookAndFeel.installProperty as there
// is NO reason for the RootPane not to be opaque. For painting to
// work the contentPane must be opaque, therefor the RootPane can
// also be opaque.
rp.
setOpaque(true);
return
rp;
}
/**
* Processes window events occurring on this component.
* Hides the window or disposes of it, as specified by the setting
* of the <code>defaultCloseOperation</code> property.
*
* @param e the window event
* @see #setDefaultCloseOperation
* @see java.awt.Window#processWindowEvent
*/
protected void
processWindowEvent(final
WindowEvent e) {
super.processWindowEvent(
e);
if (
e.
getID() ==
WindowEvent.
WINDOW_CLOSING) {
switch (
defaultCloseOperation) {
case
HIDE_ON_CLOSE:
setVisible(false);
break;
case
DISPOSE_ON_CLOSE:
dispose();
break;
case
EXIT_ON_CLOSE:
// This needs to match the checkExit call in
// setDefaultCloseOperation
System.
exit(0);
break;
case
DO_NOTHING_ON_CLOSE:
default:
}
}
}
/**
* Sets the operation that will happen by default when
* the user initiates a "close" on this frame.
* You must specify one of the following choices:
* <br><br>
* <ul>
* <li><code>DO_NOTHING_ON_CLOSE</code>
* (defined in <code>WindowConstants</code>):
* Don't do anything; require the
* program to handle the operation in the <code>windowClosing</code>
* method of a registered <code>WindowListener</code> object.
*
* <li><code>HIDE_ON_CLOSE</code>
* (defined in <code>WindowConstants</code>):
* Automatically hide the frame after
* invoking any registered <code>WindowListener</code>
* objects.
*
* <li><code>DISPOSE_ON_CLOSE</code>
* (defined in <code>WindowConstants</code>):
* Automatically hide and dispose the
* frame after invoking any registered <code>WindowListener</code>
* objects.
*
* <li><code>EXIT_ON_CLOSE</code>
* (defined in <code>JFrame</code>):
* Exit the application using the <code>System</code>
* <code>exit</code> method. Use this only in applications.
* </ul>
* <p>
* The value is set to <code>HIDE_ON_CLOSE</code> by default. Changes
* to the value of this property cause the firing of a property
* change event, with property name "defaultCloseOperation".
* <p>
* <b>Note</b>: When the last displayable window within the
* Java virtual machine (VM) is disposed of, the VM may
* terminate. See <a href="../../java/awt/doc-files/AWTThreadIssues.html">
* AWT Threading Issues</a> for more information.
*
* @param operation the operation which should be performed when the
* user closes the frame
* @exception IllegalArgumentException if defaultCloseOperation value
* isn't one of the above valid values
* @see #addWindowListener
* @see #getDefaultCloseOperation
* @see WindowConstants
* @throws SecurityException
* if <code>EXIT_ON_CLOSE</code> has been specified and the
* <code>SecurityManager</code> will
* not allow the caller to invoke <code>System.exit</code>
* @see java.lang.Runtime#exit(int)
*
* @beaninfo
* preferred: true
* bound: true
* enum: DO_NOTHING_ON_CLOSE WindowConstants.DO_NOTHING_ON_CLOSE
* HIDE_ON_CLOSE WindowConstants.HIDE_ON_CLOSE
* DISPOSE_ON_CLOSE WindowConstants.DISPOSE_ON_CLOSE
* EXIT_ON_CLOSE WindowConstants.EXIT_ON_CLOSE
* description: The frame's default close operation.
*/
public void
setDefaultCloseOperation(int
operation) {
if (
operation !=
DO_NOTHING_ON_CLOSE &&
operation !=
HIDE_ON_CLOSE &&
operation !=
DISPOSE_ON_CLOSE &&
operation !=
EXIT_ON_CLOSE) {
throw new
IllegalArgumentException("defaultCloseOperation must be one of: DO_NOTHING_ON_CLOSE, HIDE_ON_CLOSE, DISPOSE_ON_CLOSE, or EXIT_ON_CLOSE");
}
if (
operation ==
EXIT_ON_CLOSE) {
SecurityManager security =
System.
getSecurityManager();
if (
security != null) {
security.
checkExit(0);
}
}
if (this.
defaultCloseOperation !=
operation) {
int
oldValue = this.
defaultCloseOperation;
this.
defaultCloseOperation =
operation;
firePropertyChange("defaultCloseOperation",
oldValue,
operation);
}
}
/**
* Returns the operation that occurs when the user
* initiates a "close" on this frame.
*
* @return an integer indicating the window-close operation
* @see #setDefaultCloseOperation
*/
public int
getDefaultCloseOperation() {
return
defaultCloseOperation;
}
/**
* Sets the {@code transferHandler} property, which is a mechanism to
* support transfer of data into this component. Use {@code null}
* if the component does not support data transfer operations.
* <p>
* If the system property {@code suppressSwingDropSupport} is {@code false}
* (the default) and the current drop target on this component is either
* {@code null} or not a user-set drop target, this method will change the
* drop target as follows: If {@code newHandler} is {@code null} it will
* clear the drop target. If not {@code null} it will install a new
* {@code DropTarget}.
* <p>
* Note: When used with {@code JFrame}, {@code TransferHandler} only
* provides data import capability, as the data export related methods
* are currently typed to {@code JComponent}.
* <p>
* Please see
* <a href="https://docs.oracle.com/javase/tutorial/uiswing/dnd/index.html">
* How to Use Drag and Drop and Data Transfer</a>, a section in
* <em>The Java Tutorial</em>, for more information.
*
* @param newHandler the new {@code TransferHandler}
*
* @see TransferHandler
* @see #getTransferHandler
* @see java.awt.Component#setDropTarget
* @since 1.6
*
* @beaninfo
* bound: true
* hidden: true
* description: Mechanism for transfer of data into the component
*/
public void
setTransferHandler(
TransferHandler newHandler) {
TransferHandler oldHandler =
transferHandler;
transferHandler =
newHandler;
SwingUtilities.
installSwingDropTargetAsNecessary(this,
transferHandler);
firePropertyChange("transferHandler",
oldHandler,
newHandler);
}
/**
* Gets the <code>transferHandler</code> property.
*
* @return the value of the <code>transferHandler</code> property
*
* @see TransferHandler
* @see #setTransferHandler
* @since 1.6
*/
public
TransferHandler getTransferHandler() {
return
transferHandler;
}
/**
* Just calls <code>paint(g)</code>. This method was overridden to
* prevent an unnecessary call to clear the background.
*
* @param g the Graphics context in which to paint
*/
public void
update(
Graphics g) {
paint(
g);
}
/**
* Sets the menubar for this frame.
* @param menubar the menubar being placed in the frame
*
* @see #getJMenuBar
*
* @beaninfo
* hidden: true
* description: The menubar for accessing pulldown menus from this frame.
*/
public void
setJMenuBar(
JMenuBar menubar) {
getRootPane().
setMenuBar(
menubar);
}
/**
* Returns the menubar set on this frame.
* @return the menubar for this frame
*
* @see #setJMenuBar
*/
public
JMenuBar getJMenuBar() {
return
getRootPane().
getMenuBar();
}
/**
* Returns whether calls to <code>add</code> and
* <code>setLayout</code> are forwarded to the <code>contentPane</code>.
*
* @return true if <code>add</code> and <code>setLayout</code>
* are forwarded; false otherwise
*
* @see #addImpl
* @see #setLayout
* @see #setRootPaneCheckingEnabled
* @see javax.swing.RootPaneContainer
*/
protected boolean
isRootPaneCheckingEnabled() {
return
rootPaneCheckingEnabled;
}
/**
* Sets whether calls to <code>add</code> and
* <code>setLayout</code> are forwarded to the <code>contentPane</code>.
*
* @param enabled true if <code>add</code> and <code>setLayout</code>
* are forwarded, false if they should operate directly on the
* <code>JFrame</code>.
*
* @see #addImpl
* @see #setLayout
* @see #isRootPaneCheckingEnabled
* @see javax.swing.RootPaneContainer
* @beaninfo
* hidden: true
* description: Whether the add and setLayout methods are forwarded
*/
protected void
setRootPaneCheckingEnabled(boolean
enabled) {
rootPaneCheckingEnabled =
enabled;
}
/**
* Adds the specified child <code>Component</code>.
* This method is overridden to conditionally forward calls to the
* <code>contentPane</code>.
* By default, children are added to the <code>contentPane</code> instead
* of the frame, refer to {@link javax.swing.RootPaneContainer} for
* details.
*
* @param comp the component to be enhanced
* @param constraints the constraints to be respected
* @param index the index
* @exception IllegalArgumentException if <code>index</code> is invalid
* @exception IllegalArgumentException if adding the container's parent
* to itself
* @exception IllegalArgumentException if adding a window to a container
*
* @see #setRootPaneCheckingEnabled
* @see javax.swing.RootPaneContainer
*/
protected void
addImpl(
Component comp,
Object constraints, int
index)
{
if(
isRootPaneCheckingEnabled()) {
getContentPane().
add(
comp,
constraints,
index);
}
else {
super.addImpl(
comp,
constraints,
index);
}
}
/**
* Removes the specified component from the container. If
* <code>comp</code> is not the <code>rootPane</code>, this will forward
* the call to the <code>contentPane</code>. This will do nothing if
* <code>comp</code> is not a child of the <code>JFrame</code> or
* <code>contentPane</code>.
*
* @param comp the component to be removed
* @throws NullPointerException if <code>comp</code> is null
* @see #add
* @see javax.swing.RootPaneContainer
*/
public void
remove(
Component comp) {
if (
comp ==
rootPane) {
super.remove(
comp);
} else {
getContentPane().
remove(
comp);
}
}
/**
* Sets the <code>LayoutManager</code>.
* Overridden to conditionally forward the call to the
* <code>contentPane</code>.
* Refer to {@link javax.swing.RootPaneContainer} for
* more information.
*
* @param manager the <code>LayoutManager</code>
* @see #setRootPaneCheckingEnabled
* @see javax.swing.RootPaneContainer
*/
public void
setLayout(
LayoutManager manager) {
if(
isRootPaneCheckingEnabled()) {
getContentPane().
setLayout(
manager);
}
else {
super.setLayout(
manager);
}
}
/**
* Returns the <code>rootPane</code> object for this frame.
* @return the <code>rootPane</code> property
*
* @see #setRootPane
* @see RootPaneContainer#getRootPane
*/
public
JRootPane getRootPane() {
return
rootPane;
}
/**
* Sets the <code>rootPane</code> property.
* This method is called by the constructor.
* @param root the <code>rootPane</code> object for this frame
*
* @see #getRootPane
*
* @beaninfo
* hidden: true
* description: the RootPane object for this frame.
*/
protected void
setRootPane(
JRootPane root)
{
if(
rootPane != null) {
remove(
rootPane);
}
rootPane =
root;
if(
rootPane != null) {
boolean
checkingEnabled =
isRootPaneCheckingEnabled();
try {
setRootPaneCheckingEnabled(false);
add(
rootPane,
BorderLayout.
CENTER);
}
finally {
setRootPaneCheckingEnabled(
checkingEnabled);
}
}
}
/**
* {@inheritDoc}
*/
public void
setIconImage(
Image image) {
super.setIconImage(
image);
}
/**
* Returns the <code>contentPane</code> object for this frame.
* @return the <code>contentPane</code> property
*
* @see #setContentPane
* @see RootPaneContainer#getContentPane
*/
public
Container getContentPane() {
return
getRootPane().
getContentPane();
}
/**
* Sets the <code>contentPane</code> property.
* This method is called by the constructor.
* <p>
* Swing's painting architecture requires an opaque <code>JComponent</code>
* in the containment hierarchy. This is typically provided by the
* content pane. If you replace the content pane it is recommended you
* replace it with an opaque <code>JComponent</code>.
*
* @param contentPane the <code>contentPane</code> object for this frame
*
* @exception java.awt.IllegalComponentStateException (a runtime
* exception) if the content pane parameter is <code>null</code>
* @see #getContentPane
* @see RootPaneContainer#setContentPane
* @see JRootPane
*
* @beaninfo
* hidden: true
* description: The client area of the frame where child
* components are normally inserted.
*/
public void
setContentPane(
Container contentPane) {
getRootPane().
setContentPane(
contentPane);
}
/**
* Returns the <code>layeredPane</code> object for this frame.
* @return the <code>layeredPane</code> property
*
* @see #setLayeredPane
* @see RootPaneContainer#getLayeredPane
*/
public
JLayeredPane getLayeredPane() {
return
getRootPane().
getLayeredPane();
}
/**
* Sets the <code>layeredPane</code> property.
* This method is called by the constructor.
* @param layeredPane the <code>layeredPane</code> object for this frame
*
* @exception java.awt.IllegalComponentStateException (a runtime
* exception) if the layered pane parameter is <code>null</code>
* @see #getLayeredPane
* @see RootPaneContainer#setLayeredPane
*
* @beaninfo
* hidden: true
* description: The pane that holds the various frame layers.
*/
public void
setLayeredPane(
JLayeredPane layeredPane) {
getRootPane().
setLayeredPane(
layeredPane);
}
/**
* Returns the <code>glassPane</code> object for this frame.
* @return the <code>glassPane</code> property
*
* @see #setGlassPane
* @see RootPaneContainer#getGlassPane
*/
public
Component getGlassPane() {
return
getRootPane().
getGlassPane();
}
/**
* Sets the <code>glassPane</code> property.
* This method is called by the constructor.
* @param glassPane the <code>glassPane</code> object for this frame
*
* @see #getGlassPane
* @see RootPaneContainer#setGlassPane
*
* @beaninfo
* hidden: true
* description: A transparent pane used for menu rendering.
*/
public void
setGlassPane(
Component glassPane) {
getRootPane().
setGlassPane(
glassPane);
}
/**
* {@inheritDoc}
*
* @since 1.6
*/
public
Graphics getGraphics() {
JComponent.
getGraphicsInvoked(this);
return super.getGraphics();
}
/**
* Repaints the specified rectangle of this component within
* <code>time</code> milliseconds. Refer to <code>RepaintManager</code>
* for details on how the repaint is handled.
*
* @param time maximum time in milliseconds before update
* @param x the <i>x</i> coordinate
* @param y the <i>y</i> coordinate
* @param width the width
* @param height the height
* @see RepaintManager
* @since 1.6
*/
public void
repaint(long
time, int
x, int
y, int
width, int
height) {
if (
RepaintManager.
HANDLE_TOP_LEVEL_PAINT) {
RepaintManager.
currentManager(this).
addDirtyRegion(
this,
x,
y,
width,
height);
}
else {
super.repaint(
time,
x,
y,
width,
height);
}
}
/**
* Provides a hint as to whether or not newly created <code>JFrame</code>s
* should have their Window decorations (such as borders, widgets to
* close the window, title...) provided by the current look
* and feel. If <code>defaultLookAndFeelDecorated</code> is true,
* the current <code>LookAndFeel</code> supports providing window
* decorations, and the current window manager supports undecorated
* windows, then newly created <code>JFrame</code>s will have their
* Window decorations provided by the current <code>LookAndFeel</code>.
* Otherwise, newly created <code>JFrame</code>s will have their
* Window decorations provided by the current window manager.
* <p>
* You can get the same effect on a single JFrame by doing the following:
* <pre>
* JFrame frame = new JFrame();
* frame.setUndecorated(true);
* frame.getRootPane().setWindowDecorationStyle(JRootPane.FRAME);
* </pre>
*
* @param defaultLookAndFeelDecorated A hint as to whether or not current
* look and feel should provide window decorations
* @see javax.swing.LookAndFeel#getSupportsWindowDecorations
* @since 1.4
*/
public static void
setDefaultLookAndFeelDecorated(boolean
defaultLookAndFeelDecorated) {
if (
defaultLookAndFeelDecorated) {
SwingUtilities.
appContextPut(
defaultLookAndFeelDecoratedKey,
Boolean.
TRUE);
} else {
SwingUtilities.
appContextPut(
defaultLookAndFeelDecoratedKey,
Boolean.
FALSE);
}
}
/**
* Returns true if newly created <code>JFrame</code>s should have their
* Window decorations provided by the current look and feel. This is only
* a hint, as certain look and feels may not support this feature.
*
* @return true if look and feel should provide Window decorations.
* @since 1.4
*/
public static boolean
isDefaultLookAndFeelDecorated() {
Boolean defaultLookAndFeelDecorated =
(
Boolean)
SwingUtilities.
appContextGet(
defaultLookAndFeelDecoratedKey);
if (
defaultLookAndFeelDecorated == null) {
defaultLookAndFeelDecorated =
Boolean.
FALSE;
}
return
defaultLookAndFeelDecorated.
booleanValue();
}
/**
* Returns a string representation of this <code>JFrame</code>.
* This method
* is intended to be used only for debugging purposes, and the
* content and format of the returned string may vary between
* implementations. The returned string may be empty but may not
* be <code>null</code>.
*
* @return a string representation of this <code>JFrame</code>
*/
protected
String paramString() {
String defaultCloseOperationString;
if (
defaultCloseOperation ==
HIDE_ON_CLOSE) {
defaultCloseOperationString = "HIDE_ON_CLOSE";
} else if (
defaultCloseOperation ==
DISPOSE_ON_CLOSE) {
defaultCloseOperationString = "DISPOSE_ON_CLOSE";
} else if (
defaultCloseOperation ==
DO_NOTHING_ON_CLOSE) {
defaultCloseOperationString = "DO_NOTHING_ON_CLOSE";
} else if (
defaultCloseOperation == 3) {
defaultCloseOperationString = "EXIT_ON_CLOSE";
} else
defaultCloseOperationString = "";
String rootPaneString = (
rootPane != null ?
rootPane.
toString() : "");
String rootPaneCheckingEnabledString = (
rootPaneCheckingEnabled ?
"true" : "false");
return super.paramString() +
",defaultCloseOperation=" +
defaultCloseOperationString +
",rootPane=" +
rootPaneString +
",rootPaneCheckingEnabled=" +
rootPaneCheckingEnabledString;
}
/////////////////
// Accessibility support
////////////////
/** The accessible context property. */
protected
AccessibleContext accessibleContext = null;
/**
* Gets the AccessibleContext associated with this JFrame.
* For JFrames, the AccessibleContext takes the form of an
* AccessibleJFrame.
* A new AccessibleJFrame instance is created if necessary.
*
* @return an AccessibleJFrame that serves as the
* AccessibleContext of this JFrame
*/
public
AccessibleContext getAccessibleContext() {
if (
accessibleContext == null) {
accessibleContext = new
AccessibleJFrame();
}
return
accessibleContext;
}
/**
* This class implements accessibility support for the
* <code>JFrame</code> class. It provides an implementation of the
* Java Accessibility API appropriate to frame user-interface
* elements.
*/
protected class
AccessibleJFrame extends
AccessibleAWTFrame {
// AccessibleContext methods
/**
* Get the accessible name of this object.
*
* @return the localized name of the object -- can be null if this
* object does not have a name
*/
public
String getAccessibleName() {
if (
accessibleName != null) {
return
accessibleName;
} else {
if (
getTitle() == null) {
return super.getAccessibleName();
} else {
return
getTitle();
}
}
}
/**
* Get the state of this object.
*
* @return an instance of AccessibleStateSet containing the current
* state set of the object
* @see AccessibleState
*/
public
AccessibleStateSet getAccessibleStateSet() {
AccessibleStateSet states = super.getAccessibleStateSet();
if (
isResizable()) {
states.
add(
AccessibleState.
RESIZABLE);
}
if (
getFocusOwner() != null) {
states.
add(
AccessibleState.
ACTIVE);
}
// FIXME: [[[WDW - should also return ICONIFIED and ICONIFIABLE
// if we can ever figure these out]]]
return
states;
}
} // inner class AccessibleJFrame
}