JDK8/Java8源码在线阅读
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package javax.swing;
import java.awt.*;
import java.awt.event.*;
import javax.accessibility.*;
/**
* The main class for creating a dialog window. You can use this class
* to create a custom dialog, or invoke the many class methods
* in {@link JOptionPane} to create a variety of standard dialogs.
* For information about creating dialogs, see
* <em>The Java Tutorial</em> section
* <a
href="https://docs.oracle.com/javase/tutorial/uiswing/components/dialog.html">How
* to Make Dialogs</a>.
*
* <p>
*
* The {@code JDialog} component contains a {@code JRootPane}
* as its only child.
* The {@code contentPane} should be the parent of any children of the
* {@code JDialog}.
* 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 dialog as follows:
* <pre>
* dialog.add(child);
* </pre>
* And the child will be added to the contentPane.
* The {@code contentPane} is always non-{@code null}.
* Attempting to set it to {@code null} generates an exception.
* The default {@code contentPane} has a {@code BorderLayout}
* manager set on it.
* Refer to {@link javax.swing.RootPaneContainer}
* for details on adding, removing and setting the {@code LayoutManager}
* of a {@code JDialog}.
* <p>
* Please see the {@code JRootPane} documentation for a complete
* description of the {@code contentPane}, {@code glassPane},
* and {@code layeredPane} components.
* <p>
* In a multi-screen environment, you can create a {@code JDialog}
* on a different screen device than its owner. 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} package.
* Please see {@link java.beans.XMLEncoder}.
*
* @see JOptionPane
* @see JRootPane
* @see javax.swing.RootPaneContainer
*
* @beaninfo
* attribute: isContainer true
* attribute: containerDelegate getContentPane
* description: A toplevel window for creating dialog boxes.
*
* @author David Kloba
* @author James Gosling
* @author Scott Violet
*/
public class JDialog extends Dialog implements WindowConstants,
Accessible,
RootPaneContainer,
TransferHandler.HasGetTransferHandler
{
/**
* Key into the AppContext, used to check if should provide decorations
* by default.
*/
private static final Object defaultLookAndFeelDecoratedKey =
new StringBuffer("JDialog.defaultLookAndFeelDecorated");
private int defaultCloseOperation = HIDE_ON_CLOSE;
/**
* @see #getRootPane
* @see #setRootPane
*/
protected JRootPane rootPane;
/**
* If true then calls to {@code add} and {@code setLayout}
* will be forwarded to the {@code contentPane}. This is initially
* false, but is set to true when the {@code JDialog} is constructed.
*
* @see #isRootPaneCheckingEnabled
* @see #setRootPaneCheckingEnabled
* @see javax.swing.RootPaneContainer
*/
protected boolean rootPaneCheckingEnabled = false;
/**
* The {@code TransferHandler} for this dialog.
*/
private TransferHandler transferHandler;
/**
* Creates a modeless dialog without a title and without a specified
* {@code Frame} owner. A shared, hidden frame will be
* set as the owner of the dialog.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
* <p>
* NOTE: This constructor does not allow you to create an unowned
* {@code JDialog}. To create an unowned {@code JDialog}
* you must use either the {@code JDialog(Window)} or
* {@code JDialog(Dialog)} constructor with an argument of
* {@code null}.
*
* @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()}
* returns {@code true}.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*/
public JDialog() {
this((Frame)null, false);
}
/**
* Creates a modeless dialog with the specified {@code Frame}
* as its owner and an empty title. If {@code owner}
* is {@code null}, a shared, hidden frame will be set as the
* owner of the dialog.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
* <p>
* NOTE: This constructor does not allow you to create an unowned
* {@code JDialog}. To create an unowned {@code JDialog}
* you must use either the {@code JDialog(Window)} or
* {@code JDialog(Dialog)} constructor with an argument of
* {@code null}.
*
* @param owner the {@code Frame} from which the dialog is displayed
* @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()}
* returns {@code true}.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*/
public JDialog(Frame owner) {
this(owner, false);
}
/**
* Creates a dialog with an empty title and the specified modality and
* {@code Frame} as its owner. If {@code owner} is {@code null},
* a shared, hidden frame will be set as the owner of the dialog.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
* <p>
* NOTE: This constructor does not allow you to create an unowned
* {@code JDialog}. To create an unowned {@code JDialog}
* you must use either the {@code JDialog(Window)} or
* {@code JDialog(Dialog)} constructor with an argument of
* {@code null}.
*
* @param owner the {@code Frame} from which the dialog is displayed
* @param modal specifies whether dialog blocks user input to other top-level
* windows when shown. If {@code true}, the modality type property is set to
* {@code DEFAULT_MODALITY_TYPE}, otherwise the dialog is modeless.
* @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()}
* returns {@code true}.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*/
public JDialog(Frame owner, boolean modal) {
this(owner, "", modal);
}
/**
* Creates a modeless dialog with the specified title and
* with the specified owner frame. If {@code owner}
* is {@code null}, a shared, hidden frame will be set as the
* owner of the dialog.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
* <p>
* NOTE: This constructor does not allow you to create an unowned
* {@code JDialog}. To create an unowned {@code JDialog}
* you must use either the {@code JDialog(Window)} or
* {@code JDialog(Dialog)} constructor with an argument of
* {@code null}.
*
* @param owner the {@code Frame} from which the dialog is displayed
* @param title the {@code String} to display in the dialog's
* title bar
* @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()}
* returns {@code true}.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*/
public JDialog(Frame owner, String title) {
this(owner, title, false);
}
/**
* Creates a dialog with the specified title, owner {@code Frame}
* and modality. If {@code owner} is {@code null},
* a shared, hidden frame will be set as the owner of this dialog.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
* <p>
* NOTE: Any popup components ({@code JComboBox},
* {@code JPopupMenu}, {@code JMenuBar})
* created within a modal dialog will be forced to be lightweight.
* <p>
* NOTE: This constructor does not allow you to create an unowned
* {@code JDialog}. To create an unowned {@code JDialog}
* you must use either the {@code JDialog(Window)} or
* {@code JDialog(Dialog)} constructor with an argument of
* {@code null}.
*
* @param owner the {@code Frame} from which the dialog is displayed
* @param title the {@code String} to display in the dialog's
* title bar
* @param modal specifies whether dialog blocks user input to other top-level
* windows when shown. If {@code true}, the modality type property is set to
* {@code DEFAULT_MODALITY_TYPE} otherwise the dialog is modeless
* @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()}
* returns {@code true}.
*
* @see java.awt.Dialog.ModalityType
* @see java.awt.Dialog.ModalityType#MODELESS
* @see java.awt.Dialog#DEFAULT_MODALITY_TYPE
* @see java.awt.Dialog#setModal
* @see java.awt.Dialog#setModalityType
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*/
public JDialog(Frame owner, String title, boolean modal) {
super(owner == null? SwingUtilities.getSharedOwnerFrame() : owner,
title, modal);
if (owner == null) {
WindowListener ownerShutdownListener =
SwingUtilities.getSharedOwnerFrameShutdownListener();
addWindowListener(ownerShutdownListener);
}
dialogInit();
}
/**
* Creates a dialog with the specified title,
* owner {@code Frame}, modality and {@code GraphicsConfiguration}.
* If {@code owner} is {@code null},
* a shared, hidden frame will be set as the owner of this dialog.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
* <p>
* NOTE: Any popup components ({@code JComboBox},
* {@code JPopupMenu}, {@code JMenuBar})
* created within a modal dialog will be forced to be lightweight.
* <p>
* NOTE: This constructor does not allow you to create an unowned
* {@code JDialog}. To create an unowned {@code JDialog}
* you must use either the {@code JDialog(Window)} or
* {@code JDialog(Dialog)} constructor with an argument of
* {@code null}.
*
* @param owner the {@code Frame} from which the dialog is displayed
* @param title the {@code String} to display in the dialog's
* title bar
* @param modal specifies whether dialog blocks user input to other top-level
* windows when shown. If {@code true}, the modality type property is set to
* {@code DEFAULT_MODALITY_TYPE}, otherwise the dialog is modeless.
* @param gc the {@code GraphicsConfiguration} of the target screen device;
* if {@code null}, the default system {@code GraphicsConfiguration}
* is assumed
* @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()}
* returns {@code true}.
* @see java.awt.Dialog.ModalityType
* @see java.awt.Dialog.ModalityType#MODELESS
* @see java.awt.Dialog#DEFAULT_MODALITY_TYPE
* @see java.awt.Dialog#setModal
* @see java.awt.Dialog#setModalityType
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
* @since 1.4
*/
public JDialog(Frame owner, String title, boolean modal,
GraphicsConfiguration gc) {
super(owner == null? SwingUtilities.getSharedOwnerFrame() : owner,
title, modal, gc);
if (owner == null) {
WindowListener ownerShutdownListener =
SwingUtilities.getSharedOwnerFrameShutdownListener();
addWindowListener(ownerShutdownListener);
}
dialogInit();
}
/**
* Creates a modeless dialog with the specified {@code Dialog}
* as its owner and an empty title.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
*
* @param owner the owner {@code Dialog} from which the dialog is displayed
* or {@code null} if this dialog has no owner
* @throws HeadlessException {@code if GraphicsEnvironment.isHeadless()}
* returns {@code true}.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*/
public JDialog(Dialog owner) {
this(owner, false);
}
/**
* Creates a dialog with an empty title and the specified modality and
* {@code Dialog} as its owner.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
*
* @param owner the owner {@code Dialog} from which the dialog is displayed
* or {@code null} if this dialog has no owner
* @param modal specifies whether dialog blocks user input to other top-level
* windows when shown. If {@code true}, the modality type property is set to
* {@code DEFAULT_MODALITY_TYPE}, otherwise the dialog is modeless.
* @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()}
* returns {@code true}.
* @see java.awt.Dialog.ModalityType
* @see java.awt.Dialog.ModalityType#MODELESS
* @see java.awt.Dialog#DEFAULT_MODALITY_TYPE
* @see java.awt.Dialog#setModal
* @see java.awt.Dialog#setModalityType
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*/
public JDialog(Dialog owner, boolean modal) {
this(owner, "", modal);
}
/**
* Creates a modeless dialog with the specified title and
* with the specified owner dialog.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
*
* @param owner the owner {@code Dialog} from which the dialog is displayed
* or {@code null} if this dialog has no owner
* @param title the {@code String} to display in the dialog's
* title bar
* @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()}
* returns {@code true}.
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*/
public JDialog(Dialog owner, String title) {
this(owner, title, false);
}
/**
* Creates a dialog with the specified title, modality
* and the specified owner {@code Dialog}.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
*
* @param owner the owner {@code Dialog} from which the dialog is displayed
* or {@code null} if this dialog has no owner
* @param title the {@code String} to display in the dialog's
* title bar
* @param modal specifies whether dialog blocks user input to other top-level
* windows when shown. If {@code true}, the modality type property is set to
* {@code DEFAULT_MODALITY_TYPE}, otherwise the dialog is modeless
* @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()}
* returns {@code true}.
* @see java.awt.Dialog.ModalityType
* @see java.awt.Dialog.ModalityType#MODELESS
* @see java.awt.Dialog#DEFAULT_MODALITY_TYPE
* @see java.awt.Dialog#setModal
* @see java.awt.Dialog#setModalityType
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*/
public JDialog(Dialog owner, String title, boolean modal) {
super(owner, title, modal);
dialogInit();
}
/**
* Creates a dialog with the specified title, owner {@code Dialog},
* modality and {@code GraphicsConfiguration}.
*
* <p>
* NOTE: Any popup components ({@code JComboBox},
* {@code JPopupMenu}, {@code JMenuBar})
* created within a modal dialog will be forced to be lightweight.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
*
* @param owner the owner {@code Dialog} from which the dialog is displayed
* or {@code null} if this dialog has no owner
* @param title the {@code String} to display in the dialog's
* title bar
* @param modal specifies whether dialog blocks user input to other top-level
* windows when shown. If {@code true}, the modality type property is set to
* {@code DEFAULT_MODALITY_TYPE}, otherwise the dialog is modeless
* @param gc the {@code GraphicsConfiguration} of the target screen device;
* if {@code null}, the default system {@code GraphicsConfiguration}
* is assumed
* @throws HeadlessException if {@code GraphicsEnvironment.isHeadless()}
* returns {@code true}.
* @see java.awt.Dialog.ModalityType
* @see java.awt.Dialog.ModalityType#MODELESS
* @see java.awt.Dialog#DEFAULT_MODALITY_TYPE
* @see java.awt.Dialog#setModal
* @see java.awt.Dialog#setModalityType
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
* @since 1.4
*/
public JDialog(Dialog owner, String title, boolean modal,
GraphicsConfiguration gc) {
super(owner, title, modal, gc);
dialogInit();
}
/**
* Creates a modeless dialog with the specified {@code Window}
* as its owner and an empty title.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
*
* @param owner the {@code Window} from which the dialog is displayed or
* {@code null} if this dialog has no owner
*
* @throws IllegalArgumentException
* if the {@code owner} is not an instance of {@link java.awt.Dialog Dialog}
* or {@link java.awt.Frame Frame}
* @throws IllegalArgumentException
* if the {@code owner}'s {@code GraphicsConfiguration} is not from a screen device
* @throws HeadlessException
* when {@code GraphicsEnvironment.isHeadless()} returns {@code true}
*
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*
* @since 1.6
*/
public JDialog(Window owner) {
this(owner, Dialog.ModalityType.MODELESS);
}
/**
* Creates a dialog with an empty title and the specified modality and
* {@code Window} as its owner.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
*
* @param owner the {@code Window} from which the dialog is displayed or
* {@code null} if this dialog has no owner
* @param modalityType specifies whether dialog blocks input to other
* windows when shown. {@code null} value and unsupported modality
* types are equivalent to {@code MODELESS}
*
* @throws IllegalArgumentException
* if the {@code owner} is not an instance of {@link java.awt.Dialog Dialog}
* or {@link java.awt.Frame Frame}
* @throws IllegalArgumentException
* if the {@code owner}'s {@code GraphicsConfiguration} is not from a screen device
* @throws HeadlessException
* when {@code GraphicsEnvironment.isHeadless()} returns {@code true}
* @throws SecurityException
* if the calling thread does not have permission to create modal dialogs
* with the given {@code modalityType}
*
* @see java.awt.Dialog.ModalityType
* @see java.awt.Dialog#setModal
* @see java.awt.Dialog#setModalityType
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*
* @since 1.6
*/
public JDialog(Window owner, ModalityType modalityType) {
this(owner, "", modalityType);
}
/**
* Creates a modeless dialog with the specified title and owner
* {@code Window}.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
*
* @param owner the {@code Window} from which the dialog is displayed or
* {@code null} if this dialog has no owner
* @param title the {@code String} to display in the dialog's
* title bar or {@code null} if the dialog has no title
*
* @throws IllegalArgumentException
* if the {@code owner} is not an instance of {@link java.awt.Dialog Dialog}
* or {@link java.awt.Frame Frame}
* @throws IllegalArgumentException
* if the {@code owner}'s {@code GraphicsConfiguration} is not from a screen device
* @throws HeadlessException
* when {@code GraphicsEnvironment.isHeadless()} returns {@code true}
*
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*
* @since 1.6
*/
public JDialog(Window owner, String title) {
this(owner, title, Dialog.ModalityType.MODELESS);
}
/**
* Creates a dialog with the specified title, owner {@code Window} and
* modality.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
*
* @param owner the {@code Window} from which the dialog is displayed or
* {@code null} if this dialog has no owner
* @param title the {@code String} to display in the dialog's
* title bar or {@code null} if the dialog has no title
* @param modalityType specifies whether dialog blocks input to other
* windows when shown. {@code null} value and unsupported modality
* types are equivalent to {@code MODELESS}
*
* @throws IllegalArgumentException
* if the {@code owner} is not an instance of {@link java.awt.Dialog Dialog}
* or {@link java.awt.Frame Frame}
* @throws IllegalArgumentException
* if the {@code owner}'s {@code GraphicsConfiguration} is not from a screen device
* @throws HeadlessException
* when {@code GraphicsEnvironment.isHeadless()} returns {@code true}
* @throws SecurityException
* if the calling thread does not have permission to create modal dialogs
* with the given {@code modalityType}
*
* @see java.awt.Dialog.ModalityType
* @see java.awt.Dialog#setModal
* @see java.awt.Dialog#setModalityType
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*
* @since 1.6
*/
public JDialog(Window owner, String title, Dialog.ModalityType modalityType) {
super(owner, title, modalityType);
dialogInit();
}
/**
* Creates a dialog with the specified title, owner {@code Window},
* modality and {@code GraphicsConfiguration}.
* <p>
* NOTE: Any popup components ({@code JComboBox},
* {@code JPopupMenu}, {@code JMenuBar})
* created within a modal dialog will be forced to be lightweight.
* <p>
* This constructor sets the component's locale property to the value
* returned by {@code JComponent.getDefaultLocale}.
*
* @param owner the {@code Window} from which the dialog is displayed or
* {@code null} if this dialog has no owner
* @param title the {@code String} to display in the dialog's
* title bar or {@code null} if the dialog has no title
* @param modalityType specifies whether dialog blocks input to other
* windows when shown. {@code null} value and unsupported modality
* types are equivalent to {@code MODELESS}
* @param gc the {@code GraphicsConfiguration} of the target screen device;
* if {@code null}, the default system {@code GraphicsConfiguration}
* is assumed
* @throws IllegalArgumentException
* if the {@code owner} is not an instance of {@link java.awt.Dialog Dialog}
* or {@link java.awt.Frame Frame}
* @throws IllegalArgumentException
* if the {@code owner}'s {@code GraphicsConfiguration} is not from a screen device
* @throws HeadlessException
* when {@code GraphicsEnvironment.isHeadless()} returns {@code true}
* @throws SecurityException
* if the calling thread does not have permission to create modal dialogs
* with the given {@code modalityType}
*
* @see java.awt.Dialog.ModalityType
* @see java.awt.Dialog#setModal
* @see java.awt.Dialog#setModalityType
* @see java.awt.GraphicsEnvironment#isHeadless
* @see JComponent#getDefaultLocale
*
* @since 1.6
*/
public JDialog(Window owner, String title, Dialog.ModalityType modalityType,
GraphicsConfiguration gc) {
super(owner, title, modalityType, gc);
dialogInit();
}
/**
* Called by the constructors to init the {@code JDialog} properly.
*/
protected void dialogInit() {
enableEvents(AWTEvent.KEY_EVENT_MASK | AWTEvent.WINDOW_EVENT_MASK);
setLocale( JComponent.getDefaultLocale() );
setRootPane(createRootPane());
setBackground(UIManager.getColor("control"));
setRootPaneCheckingEnabled(true);
if (JDialog.isDefaultLookAndFeelDecorated()) {
boolean supportsWindowDecorations =
UIManager.getLookAndFeel().getSupportsWindowDecorations();
if (supportsWindowDecorations) {
setUndecorated(true);
getRootPane().setWindowDecorationStyle(JRootPane.PLAIN_DIALOG);
}
}
sun.awt.SunToolkit.checkAndSetPolicy(this);
}
/**
* Called by the constructor methods to create the default
* {@code rootPane}.
*/
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;
}
/**
* Handles window events depending on the state of the
* {@code defaultCloseOperation} property.
*
* @see #setDefaultCloseOperation
*/
protected void processWindowEvent(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 DO_NOTHING_ON_CLOSE:
default:
break;
}
}
}
/**
* Sets the operation that will happen by default when
* the user initiates a "close" on this dialog.
* You must specify one of the following choices:
* <br><br>
* <ul>
* <li>{@code DO_NOTHING_ON_CLOSE}
* (defined in {@code WindowConstants}):
* Don't do anything; require the
* program to handle the operation in the {@code windowClosing}
* method of a registered {@code WindowListener} object.
*
* <li>{@code HIDE_ON_CLOSE}
* (defined in {@code WindowConstants}):
* Automatically hide the dialog after
* invoking any registered {@code WindowListener}
* objects.
*
* <li>{@code DISPOSE_ON_CLOSE}
* (defined in {@code WindowConstants}):
* Automatically hide and dispose the
* dialog after invoking any registered {@code WindowListener}
* objects.
* </ul>
* <p>
* The value is set to {@code HIDE_ON_CLOSE} 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 dialog
* @throws IllegalArgumentException if defaultCloseOperation value
* isn't one of the above valid values
* @see #addWindowListener
* @see #getDefaultCloseOperation
* @see WindowConstants
*
* @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
* description: The dialog's default close operation.
*/
public void setDefaultCloseOperation(int operation) {
if (operation != DO_NOTHING_ON_CLOSE &&
operation != HIDE_ON_CLOSE &&
operation != DISPOSE_ON_CLOSE) {
throw new IllegalArgumentException("defaultCloseOperation must be one of: DO_NOTHING_ON_CLOSE, HIDE_ON_CLOSE, or DISPOSE_ON_CLOSE");
}
int oldValue = this.defaultCloseOperation;
this.defaultCloseOperation = operation;
firePropertyChange("defaultCloseOperation", oldValue, operation);
}
/**
* Returns the operation which occurs when the user
* initiates a "close" on this dialog.
*
* @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 JDialog}, {@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} property.
*
* @return the value of the {@code transferHandler} property
*
* @see TransferHandler
* @see #setTransferHandler
* @since 1.6
*/
public TransferHandler getTransferHandler() {
return transferHandler;
}
/**
* Calls {@code paint(g)}. This method was overridden to
* prevent an unnecessary call to clear the background.
*
* @param g the {@code Graphics} context in which to paint
*/
public void update(Graphics g) {
paint(g);
}
/**
* Sets the menubar for this dialog.
*
* @param menu the menubar being placed in the dialog
*
* @see #getJMenuBar
*
* @beaninfo
* hidden: true
* description: The menubar for accessing pulldown menus from this dialog.
*/
public void setJMenuBar(JMenuBar menu) {
getRootPane().setMenuBar(menu);
}
/**
* Returns the menubar set on this dialog.
*
* @see #setJMenuBar
*/
public JMenuBar getJMenuBar() {
return getRootPane().getMenuBar();
}
/**
* Returns whether calls to {@code add} and
* {@code setLayout} are forwarded to the {@code contentPane}.
*
* @return true if {@code add} and {@code setLayout}
* 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} and
* {@code setLayout} are forwarded to the {@code contentPane}.
*
* @param enabled true if {@code add} and {@code setLayout}
* are forwarded, false if they should operate directly on the
* {@code JDialog}.
*
* @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}.
* This method is overridden to conditionally forward calls to the
* {@code contentPane}.
* By default, children are added to the {@code contentPane} 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
* @throws IllegalArgumentException if {@code index} is invalid
* @throws IllegalArgumentException if adding the container's parent
* to itself
* @throws 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} is not the {@code rootPane}, this will forward
* the call to the {@code contentPane}. This will do nothing if
* {@code comp} is not a child of the {@code JDialog} or
* {@code contentPane}.
*
* @param comp the component to be removed
* @throws NullPointerException if {@code comp} 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}.
* Overridden to conditionally forward the call to the
* {@code contentPane}.
* Refer to {@link javax.swing.RootPaneContainer} for
* more information.
*
* @param manager the {@code LayoutManager}
* @see #setRootPaneCheckingEnabled
* @see javax.swing.RootPaneContainer
*/
public void setLayout(LayoutManager manager) {
if(isRootPaneCheckingEnabled()) {
getContentPane().setLayout(manager);
}
else {
super.setLayout(manager);
}
}
/**
* Returns the {@code rootPane} object for this dialog.
*
* @see #setRootPane
* @see RootPaneContainer#getRootPane
*/
public JRootPane getRootPane() {
return rootPane;
}
/**
* Sets the {@code rootPane} property.
* This method is called by the constructor.
*
* @param root the {@code rootPane} object for this dialog
*
* @see #getRootPane
*
* @beaninfo
* hidden: true
* description: the RootPane object for this dialog.
*/
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);
}
}
}
/**
* Returns the {@code contentPane} object for this dialog.
*
* @return the {@code contentPane} property
*
* @see #setContentPane
* @see RootPaneContainer#getContentPane
*/
public Container getContentPane() {
return getRootPane().getContentPane();
}
/**
* Sets the {@code contentPane} property.
* This method is called by the constructor.
* <p>
* Swing's painting architecture requires an opaque {@code JComponent}
* 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}.
* @see JRootPane
*
* @param contentPane the {@code contentPane} object for this dialog
*
* @throws java.awt.IllegalComponentStateException (a runtime
* exception) if the content pane parameter is {@code null}
* @see #getContentPane
* @see RootPaneContainer#setContentPane
*
* @beaninfo
* hidden: true
* description: The client area of the dialog where child
* components are normally inserted.
*/
public void setContentPane(Container contentPane) {
getRootPane().setContentPane(contentPane);
}
/**
* Returns the {@code layeredPane} object for this dialog.
*
* @return the {@code layeredPane} property
*
* @see #setLayeredPane
* @see RootPaneContainer#getLayeredPane
*/
public JLayeredPane getLayeredPane() {
return getRootPane().getLayeredPane();
}
/**
* Sets the {@code layeredPane} property.
* This method is called by the constructor.
*
* @param layeredPane the new {@code layeredPane} property
*
* @throws java.awt.IllegalComponentStateException (a runtime
* exception) if the layered pane parameter is null
* @see #getLayeredPane
* @see RootPaneContainer#setLayeredPane
*
* @beaninfo
* hidden: true
* description: The pane which holds the various dialog layers.
*/
public void setLayeredPane(JLayeredPane layeredPane) {
getRootPane().setLayeredPane(layeredPane);
}
/**
* Returns the {@code glassPane} object for this dialog.
*
* @return the {@code glassPane} property
*
* @see #setGlassPane
* @see RootPaneContainer#getGlassPane
*/
public Component getGlassPane() {
return getRootPane().getGlassPane();
}
/**
* Sets the {@code glassPane} property.
* This method is called by the constructor.
*
* @param glassPane the {@code glassPane} object for this dialog
* @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} milliseconds. Refer to {@code RepaintManager}
* 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 JDialog}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} is true,
* the current {@code LookAndFeel} supports providing window
* decorations, and the current window manager supports undecorated
* windows, then newly created {@code JDialog}s will have their
* Window decorations provided by the current {@code LookAndFeel}.
* Otherwise, newly created {@code JDialog}s will have their
* Window decorations provided by the current window manager.
* <p>
* You can get the same effect on a single JDialog by doing the following:
* <pre>
* JDialog dialog = new JDialog();
* dialog.setUndecorated(true);
* dialog.getRootPane().setWindowDecorationStyle(JRootPane.PLAIN_DIALOG);
* </pre>
*
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