/java-1.7.0-openjdk/openjdk/jdk/src/share/classes/javax/swing/JOptionPane.java

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/*
 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
 * 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.swing;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.KeyboardFocusManager;
import java.awt.Frame;
import java.awt.Point;
import java.awt.HeadlessException;
import java.awt.Window;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.awt.event.WindowListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Vector;
import javax.swing.plaf.OptionPaneUI;
import javax.swing.event.InternalFrameEvent;
import javax.swing.event.InternalFrameAdapter;
import javax.accessibility.*;
import static javax.swing.ClientPropertyKey.PopupFactory_FORCE_HEAVYWEIGHT_POPUP;

/**
 * <code>JOptionPane</code> makes it easy to pop up a standard dialog box that
 * prompts users for a value or informs them of something.
 * For information about using <code>JOptionPane</code>, see
 * <a
 href="http://java.sun.com/docs/books/tutorial/uiswing/components/dialog.html">How to Make Dialogs</a>,
 * a section in <em>The Java Tutorial</em>.
 *
 * <p>
 *
 * While the <code>JOptionPane</code>
 * class may appear complex because of the large number of methods, almost
 * all uses of this class are one-line calls to one of the static
 * <code>showXxxDialog</code> methods shown below:
 * <blockquote>
 *
 *
 * <table border=1 summary="Common JOptionPane method names and their descriptions">
 * <tr>
 *    <th>Method Name</th>
 *    <th>Description</th>
 * </tr>
 * <tr>
 *    <td>showConfirmDialog</td>
 *    <td>Asks a confirming question, like yes/no/cancel.</td>
 * </tr>
 * <tr>
 *    <td>showInputDialog</td>
 *    <td>Prompt for some input.</td>
 * </tr>
 * <tr>
 *   <td>showMessageDialog</td>
 *   <td>Tell the user about something that has happened.</td>
 * </tr>
 * <tr>
 *   <td>showOptionDialog</td>
 *   <td>The Grand Unification of the above three.</td>
 * </tr>
 * </table>
 *
 * </blockquote>
 * Each of these methods also comes in a <code>showInternalXXX</code>
 * flavor, which uses an internal frame to hold the dialog box (see
 * {@link JInternalFrame}).
 * Multiple convenience methods have also been defined -- overloaded
 * versions of the basic methods that use different parameter lists.
 * <p>
 * All dialogs are modal. Each <code>showXxxDialog</code> method blocks
 * the caller until the user's interaction is complete.
 * <p>
 *
 * <table cellspacing=6 cellpadding=4 border=0 align=right summary="layout">
 * <tr>
 *  <td bgcolor=#FFe0d0 rowspan=2>icon</td>
 *  <td bgcolor=#FFe0d0>message</td>
 * </tr>
 * <tr>
 *  <td bgcolor=#FFe0d0>input value</td>
 * </tr>
 * <tr>
 *   <td bgcolor=#FFe0d0 colspan=2>option buttons</td>
 * </tr>
 * </table>
 *
 * The basic appearance of one of these dialog boxes is generally
 * similar to the picture at the right, although the various
 * look-and-feels are
 * ultimately responsible for the final result.  In particular, the
 * look-and-feels will adjust the layout to accommodate the option pane's
 * <code>ComponentOrientation</code> property.
 * <br clear=all>
 * <p>
 * <b>Parameters:</b><br>
 * The parameters to these methods follow consistent patterns:
 * <blockquote>
 * <dl compact>
 * <dt>parentComponent<dd>
 * Defines the <code>Component</code> that is to be the parent of this
 * dialog box.
 * It is used in two ways: the <code>Frame</code> that contains
 * it is used as the <code>Frame</code>
 * parent for the dialog box, and its screen coordinates are used in
 * the placement of the dialog box. In general, the dialog box is placed
 * just below the component. This parameter may be <code>null</code>,
 * in which case a default <code>Frame</code> is used as the parent,
 * and the dialog will be
 * centered on the screen (depending on the L&F).
 * <dt><a name=message>message</a><dd>
 * A descriptive message to be placed in the dialog box.
 * In the most common usage, message is just a <code>String</code> or
 * <code>String</code> constant.
 * However, the type of this parameter is actually <code>Object</code>. Its
 * interpretation depends on its type:
 * <dl compact>
 * <dt>Object[]<dd>An array of objects is interpreted as a series of
 *                 messages (one per object) arranged in a vertical stack.
 *                 The interpretation is recursive -- each object in the
 *                 array is interpreted according to its type.
 * <dt>Component<dd>The <code>Component</code> is displayed in the dialog.
 * <dt>Icon<dd>The <code>Icon</code> is wrapped in a <code>JLabel</code>
 *               and displayed in the dialog.
 * <dt>others<dd>The object is converted to a <code>String</code> by calling
 *               its <code>toString</code> method. The result is wrapped in a
 *               <code>JLabel</code> and displayed.
 * </dl>
 * <dt>messageType<dd>Defines the style of the message. The Look and Feel
 * manager may lay out the dialog differently depending on this value, and
 * will often provide a default icon. The possible values are:
 * <ul>
 * <li><code>ERROR_MESSAGE</code>
 * <li><code>INFORMATION_MESSAGE</code>
 * <li><code>WARNING_MESSAGE</code>
 * <li><code>QUESTION_MESSAGE</code>
 * <li><code>PLAIN_MESSAGE</code>
 * </ul>
 * <dt>optionType<dd>Defines the set of option buttons that appear at
 * the bottom of the dialog box:
 * <ul>
 * <li><code>DEFAULT_OPTION</code>
 * <li><code>YES_NO_OPTION</code>
 * <li><code>YES_NO_CANCEL_OPTION</code>
 * <li><code>OK_CANCEL_OPTION</code>
 * </ul>
 * You aren't limited to this set of option buttons.  You can provide any
 * buttons you want using the options parameter.
 * <dt>options<dd>A more detailed description of the set of option buttons
 * that will appear at the bottom of the dialog box.
 * The usual value for the options parameter is an array of
 * <code>String</code>s. But
 * the parameter type is an array of <code>Objects</code>.
 * A button is created for each object depending on its type:
 * <dl compact>
 * <dt>Component<dd>The component is added to the button row directly.
 * <dt>Icon<dd>A <code>JButton</code> is created with this as its label.
 * <dt>other<dd>The <code>Object</code> is converted to a string using its
 *              <code>toString</code> method and the result is used to
 *              label a <code>JButton</code>.
 * </dl>
 * <dt>icon<dd>A decorative icon to be placed in the dialog box. A default
 * value for this is determined by the <code>messageType</code> parameter.
 * <dt>title<dd>The title for the dialog box.
 * <dt>initialValue<dd>The default selection (input value).
 * </dl>
 * </blockquote>
 * <p>
 * When the selection is changed, <code>setValue</code> is invoked,
 * which generates a <code>PropertyChangeEvent</code>.
 * <p>
 * If a <code>JOptionPane</code> has configured to all input
 * <code>setWantsInput</code>
 * the bound property <code>JOptionPane.INPUT_VALUE_PROPERTY</code>
 *  can also be listened
 * to, to determine when the user has input or selected a value.
 * <p>
 * When one of the <code>showXxxDialog</code> methods returns an integer,
 * the possible values are:
 * <ul>
 * <li><code>YES_OPTION</code>
 * <li><code>NO_OPTION</code>
 * <li><code>CANCEL_OPTION</code>
 * <li><code>OK_OPTION</code>
 * <li><code>CLOSED_OPTION</code>
 * </ul>
 * <b>Examples:</b>
 * <dl>
 * <dt>Show an error dialog that displays the message, 'alert':
 * <dd><code>
 * JOptionPane.showMessageDialog(null, "alert", "alert", JOptionPane.ERROR_MESSAGE);
 * </code><p>
 * <dt>Show an internal information dialog with the message, 'information':
 * <dd><code>
 * JOptionPane.showInternalMessageDialog(frame, "information",<br>
 *             <ul><ul>"information", JOptionPane.INFORMATION_MESSAGE);</ul></ul>
 * </code><p>
 * <dt>Show an information panel with the options yes/no and message 'choose one':
 * <dd><code>JOptionPane.showConfirmDialog(null,
 *             <ul><ul>"choose one", "choose one", JOptionPane.YES_NO_OPTION);</ul></ul>
 * </code><p>
 * <dt>Show an internal information dialog with the options yes/no/cancel and
 * message 'please choose one' and title information:
 * <dd><code>JOptionPane.showInternalConfirmDialog(frame,
 *             <ul><ul>"please choose one", "information",</ul></ul>
 *             <ul><ul>JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.INFORMATION_MESSAGE);</ul></ul>
 * </code><p>
 * <dt>Show a warning dialog with the options OK, CANCEL, title 'Warning', and
 * message 'Click OK to continue':
 * <dd><code>
 * Object[] options = { "OK", "CANCEL" };<br>
 * JOptionPane.showOptionDialog(null, "Click OK to continue", "Warning",
 *             <ul><ul>JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,</ul></ul>
 *             <ul><ul>null, options, options[0]);</ul></ul>
 * </code><p>
 * <dt>Show a dialog asking the user to type in a String:
 * <dd><code>
 * String inputValue = JOptionPane.showInputDialog("Please input a value");
 * </code><p>
 * <dt>Show a dialog asking the user to select a String:
 * <dd><code>
 * Object[] possibleValues = { "First", "Second", "Third" };<br>
 * Object selectedValue = JOptionPane.showInputDialog(null,
 *             <ul><ul>"Choose one", "Input",</ul></ul>
 *             <ul><ul>JOptionPane.INFORMATION_MESSAGE, null,</ul></ul>
 *             <ul><ul>possibleValues, possibleValues[0]);</ul></ul>
 * </code><p>
 * </dl>
 * <b>Direct Use:</b><br>
 * To create and use an <code>JOptionPane</code> directly, the
 * standard pattern is roughly as follows:
 * <pre>
 *     JOptionPane pane = new JOptionPane(<i>arguments</i>);
 *     pane.set<i>.Xxxx(...); // Configure</i>
 *     JDialog dialog = pane.createDialog(<i>parentComponent, title</i>);
 *     dialog.show();
 *     Object selectedValue = pane.getValue();
 *     if(selectedValue == null)
 *       return CLOSED_OPTION;
 *     <i>//If there is <b>not</b> an array of option buttons:</i>
 *     if(options == null) {
 *       if(selectedValue instanceof Integer)
 *          return ((Integer)selectedValue).intValue();
 *       return CLOSED_OPTION;
 *     }
 *     <i>//If there is an array of option buttons:</i>
 *     for(int counter = 0, maxCounter = options.length;
 *        counter < maxCounter; counter++) {
 *        if(options[counter].equals(selectedValue))
 *        return counter;
 *     }
 *     return CLOSED_OPTION;
 * </pre>
 * <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<sup><font size="-2">TM</font></sup>
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @see JInternalFrame
 *
 * @beaninfo
 *      attribute: isContainer true
 *    description: A component which implements standard dialog box controls.
 *
 * @author James Gosling
 * @author Scott Violet
 */
public class JOptionPane extends JComponent implements Accessible
{
    /**
     * @see #getUIClassID
     * @see #readObject
     */
    private static final String uiClassID = "OptionPaneUI";

    /**
     * Indicates that the user has not yet selected a value.
     */
    public static final Object      UNINITIALIZED_VALUE = "uninitializedValue";

    //
    // Option types
    //

    /**
     * Type meaning Look and Feel should not supply any options -- only
     * use the options from the <code>JOptionPane</code>.
     */
    public static final int         DEFAULT_OPTION = -1;
    /** Type used for <code>showConfirmDialog</code>. */
    public static final int         YES_NO_OPTION = 0;
    /** Type used for <code>showConfirmDialog</code>. */
    public static final int         YES_NO_CANCEL_OPTION = 1;
    /** Type used for <code>showConfirmDialog</code>. */
    public static final int         OK_CANCEL_OPTION = 2;

    //
    // Return values.
    //
    /** Return value from class method if YES is chosen. */
    public static final int         YES_OPTION = 0;
    /** Return value from class method if NO is chosen. */
    public static final int         NO_OPTION = 1;
    /** Return value from class method if CANCEL is chosen. */
    public static final int         CANCEL_OPTION = 2;
    /** Return value form class method if OK is chosen. */
    public static final int         OK_OPTION = 0;
    /** Return value from class method if user closes window without selecting
     * anything, more than likely this should be treated as either a
     * <code>CANCEL_OPTION</code> or <code>NO_OPTION</code>. */
    public static final int         CLOSED_OPTION = -1;

    //
    // Message types. Used by the UI to determine what icon to display,
    // and possibly what behavior to give based on the type.
    //
    /** Used for error messages. */
    public static final int  ERROR_MESSAGE = 0;
    /** Used for information messages. */
    public static final int  INFORMATION_MESSAGE = 1;
    /** Used for warning messages. */
    public static final int  WARNING_MESSAGE = 2;
    /** Used for questions. */
    public static final int  QUESTION_MESSAGE = 3;
    /** No icon is used. */
    public static final int   PLAIN_MESSAGE = -1;

    /** Bound property name for <code>icon</code>. */
    public static final String      ICON_PROPERTY = "icon";
    /** Bound property name for <code>message</code>. */
    public static final String      MESSAGE_PROPERTY = "message";
    /** Bound property name for <code>value</code>. */
    public static final String      VALUE_PROPERTY = "value";
    /** Bound property name for <code>option</code>. */
    public static final String      OPTIONS_PROPERTY = "options";
    /** Bound property name for <code>initialValue</code>. */
    public static final String      INITIAL_VALUE_PROPERTY = "initialValue";
    /** Bound property name for <code>type</code>. */
    public static final String      MESSAGE_TYPE_PROPERTY = "messageType";
    /** Bound property name for <code>optionType</code>. */
    public static final String      OPTION_TYPE_PROPERTY = "optionType";
    /** Bound property name for <code>selectionValues</code>. */
    public static final String      SELECTION_VALUES_PROPERTY = "selectionValues";
    /** Bound property name for <code>initialSelectionValue</code>. */
    public static final String      INITIAL_SELECTION_VALUE_PROPERTY = "initialSelectionValue";
    /** Bound property name for <code>inputValue</code>. */
    public static final String      INPUT_VALUE_PROPERTY = "inputValue";
    /** Bound property name for <code>wantsInput</code>. */
    public static final String      WANTS_INPUT_PROPERTY = "wantsInput";

    /** Icon used in pane. */
    transient protected Icon                  icon;
    /** Message to display. */
    transient protected Object                message;
    /** Options to display to the user. */
    transient protected Object[]              options;
    /** Value that should be initially selected in <code>options</code>. */
    transient protected Object                initialValue;
    /** Message type. */
    protected int                   messageType;
    /**
     * Option type, one of <code>DEFAULT_OPTION</code>,
     * <code>YES_NO_OPTION</code>,
     * <code>YES_NO_CANCEL_OPTION</code> or
     * <code>OK_CANCEL_OPTION</code>.
     */
    protected int                   optionType;
    /** Currently selected value, will be a valid option, or
     * <code>UNINITIALIZED_VALUE</code> or <code>null</code>. */
    transient protected Object                value;
    /** Array of values the user can choose from. Look and feel will
     * provide the UI component to choose this from. */
    protected transient Object[]              selectionValues;
    /** Value the user has input. */
    protected transient Object                inputValue;
    /** Initial value to select in <code>selectionValues</code>. */
    protected transient Object                initialSelectionValue;
    /** If true, a UI widget will be provided to the user to get input. */
    protected boolean                         wantsInput;


    /**
     * Shows a question-message dialog requesting input from the user. The
     * dialog uses the default frame, which usually means it is centered on
     * the screen.
     *
     * @param message the <code>Object</code> to display
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static String showInputDialog(Object message)
        throws HeadlessException {
        return showInputDialog(null, message);
    }

    /**
     * Shows a question-message dialog requesting input from the user, with
     * the input value initialized to <code>initialSelectionValue</code>. The
     * dialog uses the default frame, which usually means it is centered on
     * the screen.
     *
     * @param message the <code>Object</code> to display
     * @param initialSelectionValue the value used to initialize the input
     *                 field
     * @since 1.4
     */
    public static String showInputDialog(Object message, Object initialSelectionValue) {
        return showInputDialog(null, message, initialSelectionValue);
    }

    /**
     * Shows a question-message dialog requesting input from the user
     * parented to <code>parentComponent</code>.
     * The dialog is displayed on top of the <code>Component</code>'s
     * frame, and is usually positioned below the <code>Component</code>.
     *
     * @param parentComponent  the parent <code>Component</code> for the
     *          dialog
     * @param message  the <code>Object</code> to display
     * @exception HeadlessException if
     *    <code>GraphicsEnvironment.isHeadless</code> returns
     *    <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static String showInputDialog(Component parentComponent,
        Object message) throws HeadlessException {
        return showInputDialog(parentComponent, message, UIManager.getString(
            "OptionPane.inputDialogTitle", parentComponent), QUESTION_MESSAGE);
    }

    /**
     * Shows a question-message dialog requesting input from the user and
     * parented to <code>parentComponent</code>. The input value will be
     * initialized to <code>initialSelectionValue</code>.
     * The dialog is displayed on top of the <code>Component</code>'s
     * frame, and is usually positioned below the <code>Component</code>.
     *
     * @param parentComponent  the parent <code>Component</code> for the
     *          dialog
     * @param message the <code>Object</code> to display
     * @param initialSelectionValue the value used to initialize the input
     *                 field
     * @since 1.4
     */
    public static String showInputDialog(Component parentComponent, Object message,
                                         Object initialSelectionValue) {
        return (String)showInputDialog(parentComponent, message,
                      UIManager.getString("OptionPane.inputDialogTitle",
                      parentComponent), QUESTION_MESSAGE, null, null,
                      initialSelectionValue);
    }

    /**
     * Shows a dialog requesting input from the user parented to
     * <code>parentComponent</code> with the dialog having the title
     * <code>title</code> and message type <code>messageType</code>.
     *
     * @param parentComponent  the parent <code>Component</code> for the
     *                  dialog
     * @param message  the <code>Object</code> to display
     * @param title    the <code>String</code> to display in the dialog
     *                  title bar
     * @param messageType the type of message that is to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static String showInputDialog(Component parentComponent,
        Object message, String title, int messageType)
        throws HeadlessException {
        return (String)showInputDialog(parentComponent, message, title,
                                       messageType, null, null, null);
    }

    /**
     * Prompts the user for input in a blocking dialog where the
     * initial selection, possible selections, and all other options can
     * be specified. The user will able to choose from
     * <code>selectionValues</code>, where <code>null</code> implies the
     * user can input
     * whatever they wish, usually by means of a <code>JTextField</code>.
     * <code>initialSelectionValue</code> is the initial value to prompt
     * the user with. It is up to the UI to decide how best to represent
     * the <code>selectionValues</code>, but usually a
     * <code>JComboBox</code>, <code>JList</code>, or
     * <code>JTextField</code> will be used.
     *
     * @param parentComponent  the parent <code>Component</code> for the
     *                  dialog
     * @param message  the <code>Object</code> to display
     * @param title    the <code>String</code> to display in the
     *                  dialog title bar
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param icon     the <code>Icon</code> image to display
     * @param selectionValues an array of <code>Object</code>s that
     *                  gives the possible selections
     * @param initialSelectionValue the value used to initialize the input
     *                 field
     * @return user's input, or <code>null</code> meaning the user
     *                  canceled the input
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static Object showInputDialog(Component parentComponent,
        Object message, String title, int messageType, Icon icon,
        Object[] selectionValues, Object initialSelectionValue)
        throws HeadlessException {
        JOptionPane    pane = new JOptionPane(message, messageType,
                                              OK_CANCEL_OPTION, icon,
                                              null, null);

        pane.setWantsInput(true);
        pane.setSelectionValues(selectionValues);
        pane.setInitialSelectionValue(initialSelectionValue);
        pane.setComponentOrientation(((parentComponent == null) ?
            getRootFrame() : parentComponent).getComponentOrientation());

        int style = styleFromMessageType(messageType);
        JDialog dialog = pane.createDialog(parentComponent, title, style);

        pane.selectInitialValue();
        dialog.show();
        dialog.dispose();

        Object value = pane.getInputValue();

        if (value == UNINITIALIZED_VALUE) {
            return null;
        }
        return value;
    }

    /**
     * Brings up an information-message dialog titled "Message".
     *
     * @param parentComponent determines the <code>Frame</code> in
     *          which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static void showMessageDialog(Component parentComponent,
        Object message) throws HeadlessException {
        showMessageDialog(parentComponent, message, UIManager.getString(
                    "OptionPane.messageDialogTitle", parentComponent),
                    INFORMATION_MESSAGE);
    }

    /**
     * Brings up a dialog that displays a message using a default
     * icon determined by the <code>messageType</code> parameter.
     *
     * @param parentComponent determines the <code>Frame</code>
     *          in which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static void showMessageDialog(Component parentComponent,
        Object message, String title, int messageType)
        throws HeadlessException {
        showMessageDialog(parentComponent, message, title, messageType, null);
    }

    /**
     * Brings up a dialog displaying a message, specifying all parameters.
     *
     * @param parentComponent determines the <code>Frame</code> in which the
     *                  dialog is displayed; if <code>null</code>,
     *                  or if the <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param icon      an icon to display in the dialog that helps the user
     *                  identify the kind of message that is being displayed
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static void showMessageDialog(Component parentComponent,
        Object message, String title, int messageType, Icon icon)
        throws HeadlessException {
        showOptionDialog(parentComponent, message, title, DEFAULT_OPTION,
                         messageType, icon, null, null);
    }

    /**
     * Brings up a dialog with the options <i>Yes</i>,
     * <i>No</i> and <i>Cancel</i>; with the
     * title, <b>Select an Option</b>.
     *
     * @param parentComponent determines the <code>Frame</code> in which the
     *                  dialog is displayed; if <code>null</code>,
     *                  or if the <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @return an integer indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message) throws HeadlessException {
        return showConfirmDialog(parentComponent, message,
                                 UIManager.getString("OptionPane.titleText"),
                                 YES_NO_CANCEL_OPTION);
    }

    /**
     * Brings up a dialog where the number of choices is determined
     * by the <code>optionType</code> parameter.
     *
     * @param parentComponent determines the <code>Frame</code> in which the
     *                  dialog is displayed; if <code>null</code>,
     *                  or if the <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param optionType an int designating the options available on the dialog:
     *                  <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  or <code>OK_CANCEL_OPTION</code>
     * @return an int indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message, String title, int optionType)
        throws HeadlessException {
        return showConfirmDialog(parentComponent, message, title, optionType,
                                 QUESTION_MESSAGE);
    }

    /**
     * Brings up a dialog where the number of choices is determined
     * by the <code>optionType</code> parameter, where the
     * <code>messageType</code>
     * parameter determines the icon to display.
     * The <code>messageType</code> parameter is primarily used to supply
     * a default icon from the Look and Feel.
     *
     * @param parentComponent determines the <code>Frame</code> in
     *                  which the dialog is displayed; if <code>null</code>,
     *                  or if the <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used.
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options available
     *                   on the dialog: <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  or <code>OK_CANCEL_OPTION</code>
     * @param messageType an integer designating the kind of message this is;
     *                  primarily used to determine the icon from the pluggable
     *                  Look and Feel: <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @return an integer indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message, String title, int optionType, int messageType)
        throws HeadlessException {
        return showConfirmDialog(parentComponent, message, title, optionType,
                                messageType, null);
    }

    /**
     * Brings up a dialog with a specified icon, where the number of
     * choices is determined by the <code>optionType</code> parameter.
     * The <code>messageType</code> parameter is primarily used to supply
     * a default icon from the look and feel.
     *
     * @param parentComponent determines the <code>Frame</code> in which the
     *                  dialog is displayed; if <code>null</code>,
     *                  or if the <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used
     * @param message   the Object to display
     * @param title     the title string for the dialog
     * @param optionType an int designating the options available on the dialog:
     *                  <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  or <code>OK_CANCEL_OPTION</code>
     * @param messageType an int designating the kind of message this is,
     *                  primarily used to determine the icon from the pluggable
     *                  Look and Feel: <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param icon      the icon to display in the dialog
     * @return an int indicating the option selected by the user
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showConfirmDialog(Component parentComponent,
        Object message, String title, int optionType,
        int messageType, Icon icon) throws HeadlessException {
        return showOptionDialog(parentComponent, message, title, optionType,
                                messageType, icon, null, null);
    }

    /**
     * Brings up a dialog with a specified icon, where the initial
     * choice is determined by the <code>initialValue</code> parameter and
     * the number of choices is determined by the <code>optionType</code>
     * parameter.
     * <p>
     * If <code>optionType</code> is <code>YES_NO_OPTION</code>,
     * or <code>YES_NO_CANCEL_OPTION</code>
     * and the <code>options</code> parameter is <code>null</code>,
     * then the options are
     * supplied by the look and feel.
     * <p>
     * The <code>messageType</code> parameter is primarily used to supply
     * a default icon from the look and feel.
     *
     * @param parentComponent determines the <code>Frame</code>
     *                  in which the dialog is displayed;  if
     *                  <code>null</code>, or if the
     *                  <code>parentComponent</code> has no
     *                  <code>Frame</code>, a
     *                  default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param optionType an integer designating the options available on the
     *                  dialog: <code>DEFAULT_OPTION</code>,
     *                  <code>YES_NO_OPTION</code>,
     *                  <code>YES_NO_CANCEL_OPTION</code>,
     *                  or <code>OK_CANCEL_OPTION</code>
     * @param messageType an integer designating the kind of message this is,
     *                  primarily used to determine the icon from the
     *                  pluggable Look and Feel: <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param icon      the icon to display in the dialog
     * @param options   an array of objects indicating the possible choices
     *                  the user can make; if the objects are components, they
     *                  are rendered properly; non-<code>String</code>
     *                  objects are
     *                  rendered using their <code>toString</code> methods;
     *                  if this parameter is <code>null</code>,
     *                  the options are determined by the Look and Feel
     * @param initialValue the object that represents the default selection
     *                  for the dialog; only meaningful if <code>options</code>
     *                  is used; can be <code>null</code>
     * @return an integer indicating the option chosen by the user,
     *                  or <code>CLOSED_OPTION</code> if the user closed
     *                  the dialog
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public static int showOptionDialog(Component parentComponent,
        Object message, String title, int optionType, int messageType,
        Icon icon, Object[] options, Object initialValue)
        throws HeadlessException {
        JOptionPane             pane = new JOptionPane(message, messageType,
                                                       optionType, icon,
                                                       options, initialValue);

        pane.setInitialValue(initialValue);
        pane.setComponentOrientation(((parentComponent == null) ?
            getRootFrame() : parentComponent).getComponentOrientation());

        int style = styleFromMessageType(messageType);
        JDialog dialog = pane.createDialog(parentComponent, title, style);

        pane.selectInitialValue();
        dialog.show();
        dialog.dispose();

        Object        selectedValue = pane.getValue();

        if(selectedValue == null)
            return CLOSED_OPTION;
        if(options == null) {
            if(selectedValue instanceof Integer)
                return ((Integer)selectedValue).intValue();
            return CLOSED_OPTION;
        }
        for(int counter = 0, maxCounter = options.length;
            counter < maxCounter; counter++) {
            if(options[counter].equals(selectedValue))
                return counter;
        }
        return CLOSED_OPTION;
    }

    /**
     * Creates and returns a new <code>JDialog</code> wrapping
     * <code>this</code> centered on the <code>parentComponent</code>
     * in the <code>parentComponent</code>'s frame.
     * <code>title</code> is the title of the returned dialog.
     * The returned <code>JDialog</code> will not be resizable by the
     * user, however programs can invoke <code>setResizable</code> on
     * the <code>JDialog</code> instance to change this property.
     * The returned <code>JDialog</code> will be set up such that
     * once it is closed, or the user clicks on one of the buttons,
     * the optionpane's value property will be set accordingly and
     * the dialog will be closed.  Each time the dialog is made visible,
     * it will reset the option pane's value property to
     * <code>JOptionPane.UNINITIALIZED_VALUE</code> to ensure the
     * user's subsequent action closes the dialog properly.
     *
     * @param parentComponent determines the frame in which the dialog
     *          is displayed; if the <code>parentComponent</code> has
     *          no <code>Frame</code>, a default <code>Frame</code> is used
     * @param title     the title string for the dialog
     * @return a new <code>JDialog</code> containing this instance
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public JDialog createDialog(Component parentComponent, String title)
        throws HeadlessException {
        int style = styleFromMessageType(getMessageType());
        return createDialog(parentComponent, title, style);
    }

    /**
     * Creates and returns a new parentless <code>JDialog</code>
     * with the specified title.
     * The returned <code>JDialog</code> will not be resizable by the
     * user, however programs can invoke <code>setResizable</code> on
     * the <code>JDialog</code> instance to change this property.
     * The returned <code>JDialog</code> will be set up such that
     * once it is closed, or the user clicks on one of the buttons,
     * the optionpane's value property will be set accordingly and
     * the dialog will be closed.  Each time the dialog is made visible,
     * it will reset the option pane's value property to
     * <code>JOptionPane.UNINITIALIZED_VALUE</code> to ensure the
     * user's subsequent action closes the dialog properly.
     *
     * @param title     the title string for the dialog
     * @return a new <code>JDialog</code> containing this instance
     * @exception HeadlessException if
     *   <code>GraphicsEnvironment.isHeadless</code> returns
     *   <code>true</code>
     * @see java.awt.GraphicsEnvironment#isHeadless
     * @since 1.6
     */
    public JDialog createDialog(String title) throws HeadlessException {
        int style = styleFromMessageType(getMessageType());
        JDialog dialog = new JDialog((Dialog) null, title, true);
        initDialog(dialog, style, null);
        return dialog;
    }

    private JDialog createDialog(Component parentComponent, String title,
            int style)
            throws HeadlessException {

        final JDialog dialog;

        Window window = JOptionPane.getWindowForComponent(parentComponent);
        if (window instanceof Frame) {
            dialog = new JDialog((Frame)window, title, true);
        } else {
            dialog = new JDialog((Dialog)window, title, true);
        }
        if (window instanceof SwingUtilities.SharedOwnerFrame) {
            WindowListener ownerShutdownListener =
                    SwingUtilities.getSharedOwnerFrameShutdownListener();
            dialog.addWindowListener(ownerShutdownListener);
        }
        initDialog(dialog, style, parentComponent);
        return dialog;
    }

    private void initDialog(final JDialog dialog, int style, Component parentComponent) {
        dialog.setComponentOrientation(this.getComponentOrientation());
        Container contentPane = dialog.getContentPane();

        contentPane.setLayout(new BorderLayout());
        contentPane.add(this, BorderLayout.CENTER);
        dialog.setResizable(false);
        if (JDialog.isDefaultLookAndFeelDecorated()) {
            boolean supportsWindowDecorations =
              UIManager.getLookAndFeel().getSupportsWindowDecorations();
            if (supportsWindowDecorations) {
                dialog.setUndecorated(true);
                getRootPane().setWindowDecorationStyle(style);
            }
        }
        dialog.pack();
        dialog.setLocationRelativeTo(parentComponent);

        final PropertyChangeListener listener = new PropertyChangeListener() {
            public void propertyChange(PropertyChangeEvent event) {
                // Let the defaultCloseOperation handle the closing
                // if the user closed the window without selecting a button
                // (newValue = null in that case).  Otherwise, close the dialog.
                if (dialog.isVisible() && event.getSource() == JOptionPane.this &&
                        (event.getPropertyName().equals(VALUE_PROPERTY)) &&
                        event.getNewValue() != null &&
                        event.getNewValue() != JOptionPane.UNINITIALIZED_VALUE) {
                    dialog.setVisible(false);
                }
            }
        };

        WindowAdapter adapter = new WindowAdapter() {
            private boolean gotFocus = false;
            public void windowClosing(WindowEvent we) {
                setValue(null);
            }

            public void windowClosed(WindowEvent e) {
                removePropertyChangeListener(listener);
                dialog.getContentPane().removeAll();
            }

            public void windowGainedFocus(WindowEvent we) {
                // Once window gets focus, set initial focus
                if (!gotFocus) {
                    selectInitialValue();
                    gotFocus = true;
                }
            }
        };
        dialog.addWindowListener(adapter);
        dialog.addWindowFocusListener(adapter);
        dialog.addComponentListener(new ComponentAdapter() {
            public void componentShown(ComponentEvent ce) {
                // reset value to ensure closing works properly
                setValue(JOptionPane.UNINITIALIZED_VALUE);
            }
        });

        addPropertyChangeListener(listener);
    }


    /**
     * Brings up an internal confirmation dialog panel. The dialog
     * is a information-message dialog titled "Message".
     *
     * @param parentComponent determines the <code>Frame</code>
     *          in which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the object to display
     */
    public static void showInternalMessageDialog(Component parentComponent,
                                                 Object message) {
        showInternalMessageDialog(parentComponent, message, UIManager.
                                 getString("OptionPane.messageDialogTitle",
                                 parentComponent), INFORMATION_MESSAGE);
    }

    /**
     * Brings up an internal dialog panel that displays a message
     * using a default icon determined by the <code>messageType</code>
     * parameter.
     *
     * @param parentComponent determines the <code>Frame</code>
     *          in which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     */
    public static void showInternalMessageDialog(Component parentComponent,
                                                 Object message, String title,
                                                 int messageType) {
        showInternalMessageDialog(parentComponent, message, title, messageType,null);
    }

    /**
     * Brings up an internal dialog panel displaying a message,
     * specifying all parameters.
     *
     * @param parentComponent determines the <code>Frame</code>
     *          in which the dialog is displayed; if <code>null</code>,
     *          or if the <code>parentComponent</code> has no
     *          <code>Frame</code>, a default <code>Frame</code> is used
     * @param message   the <code>Object</code> to display
     * @param title     the title string for the dialog
     * @param messageType the type of message to be displayed:
     *                  <code>ERROR_MESSAGE</code>,
     *                  <code>INFORMATION_MESSAGE</code>,
     *                  <code>WARNING_MESSAGE</code>,
     *                  <code>QUESTION_MESSAGE</code>,
     *                  or <code>PLAIN_MESSAGE</code>
     * @param icon      an icon to display in the dialog that helps the user
     *                  identify the kind of message that is being displayed
     */
    public static void showInternalMessageDialog(Component parentComponent,
                                         Object message,
                                         String title, int messageType,
                                         Icon icon){
        showInternalOptionDialog(parentComponent, message, title, DEFAULT_OPTION,
                                 messageType, icon, null, null);
    }

    /**
     * Brings up an internal dialog panel with the options <i>Yes</i>, <i>No</i>
     * and …

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