bundles/org.eclipse.swt/Eclipse SWT/motif/org/eclipse/swt/widgets/MessageBox.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2009 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.widgets;


 import org.eclipse.swt.internal.*;
 import org.eclipse.swt.internal.motif.*;
 import org.eclipse.swt.*;
 import org.eclipse.swt.graphics.*;

 /**
  * Instances of this class are used to inform or warn the user.
  * <dl>
  * <dt><b>Styles:</b></dt>
  * <dd>ICON_ERROR, ICON_INFORMATION, ICON_QUESTION, ICON_WARNING, ICON_WORKING</dd>
  * <dd>OK, OK | CANCEL</dd>
  * <dd>YES | NO, YES | NO | CANCEL</dd>
  * <dd>RETRY | CANCEL</dd>
  * <dd>ABORT | RETRY | IGNORE</dd>
  * <dt><b>Events:</b></dt>
  * <dd>(none)</dd>
  * </dl>
  * <p>
  * Note: Only one of the styles ICON_ERROR, ICON_INFORMATION, ICON_QUESTION,
  * ICON_WARNING and ICON_WORKING may be specified.
  * </p><p>
  * IMPORTANT: This class is intended to be subclassed <em>only</em>
  * within the SWT implementation.
  * </p>
  *
  * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample, Dialog tab</a>
  * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
  * @noextend This class is not intended to be subclassed by clients.
  */
 public class MessageBox extends Dialog {
 	int button;
 	String message = ""; //$NON-NLS-1$

 /**
  * Constructs a new instance of this class given only its parent.
  *
  * @param parent a shell which will be the parent of the new instance
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
  *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
  * </ul>
  */
 public MessageBox (Shell parent) {
 	this (parent, SWT.OK | SWT.ICON_INFORMATION | SWT.APPLICATION_MODAL);
 }

 /**
  * Constructs a new instance of this class given its parent
  * and a style value describing its behavior and appearance.
  * <p>
  * The style value is either one of the style constants defined in
  * class <code>SWT</code> which is applicable to instances of this
  * class, or must be built by <em>bitwise OR</em>'ing together
  * (that is, using the <code>int</code> "|" operator) two or more
  * of those <code>SWT</code> style constants. The class description
  * lists the style constants that are applicable to the class.
  * Style bits are also inherited from superclasses.
  *
  * @param parent a shell which will be the parent of the new instance
  * @param style the style of dialog to construct
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
  * </ul>
  * @exception SWTException <ul>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
  *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
  * </ul>
  *
  * @see SWT#ICON_ERROR
  * @see SWT#ICON_INFORMATION
  * @see SWT#ICON_QUESTION
  * @see SWT#ICON_WARNING
  * @see SWT#ICON_WORKING
  * @see SWT#OK
  * @see SWT#CANCEL
  * @see SWT#YES
  * @see SWT#NO
  * @see SWT#ABORT
  * @see SWT#RETRY
  * @see SWT#IGNORE
  */
 public MessageBox (Shell parent, int style) {
 	super (parent, checkStyle (parent, checkStyle (style)));
 	checkSubclass ();
 }
 int activate (int widget, int client, int call) {
 	OS.XtUnmanageChild (widget);
 	button = client;
 	return 0;
 }
 static int checkStyle (int style) {
 	int mask = (SWT.YES | SWT.NO | SWT.OK | SWT.CANCEL | SWT.ABORT | SWT.RETRY | SWT.IGNORE);
 	int bits = style & mask;
 	if (bits == SWT.OK || bits == SWT.CANCEL || bits == (SWT.OK | SWT.CANCEL)) return style;
 	if (bits == SWT.YES || bits == SWT.NO || bits == (SWT.YES | SWT.NO) || bits == (SWT.YES | SWT.NO | SWT.CANCEL)) return style;
 	if (bits == (SWT.RETRY | SWT.CANCEL) || bits == (SWT.ABORT | SWT.RETRY | SWT.IGNORE)) return style;
 	style = (style & ~mask) | SWT.OK;
 	return style;
 }
 int createHandle (int parentHandle, int [] argList) {
 	if ((style & SWT.ICON_ERROR) != 0) return OS.XmCreateErrorDialog (parentHandle, null, argList, argList.length / 2);
 	if ((style & SWT.ICON_INFORMATION) != 0) return OS.XmCreateInformationDialog (parentHandle, null, argList, argList.length / 2);
 	if ((style & SWT.ICON_QUESTION) != 0) return OS.XmCreateQuestionDialog (parentHandle, null, argList, argList.length / 2);
 	if ((style & SWT.ICON_WARNING) != 0) return OS.XmCreateWarningDialog (parentHandle, null, argList, argList.length / 2);
 	if ((style & SWT.ICON_WORKING) != 0) return OS.XmCreateWorkingDialog (parentHandle, null, argList, argList.length / 2);
 	return OS.XmCreateMessageDialog (parentHandle, null, argList, argList.length / 2);
 }

 /**
  * Returns the dialog's message, or an empty string if it does not have one.
  * The message is a description of the purpose for which the dialog was opened.
  * This message will be visible in the dialog while it is open.
  *
  * @return the message
  */
 public String getMessage () {
 	return message;
 }

 /**
  * Makes the dialog visible and brings it to the front
  * of the display.
  *
  * @return the ID of the button that was selected to dismiss the
  *         message box (e.g. SWT.OK, SWT.CANCEL, etc.)
  *
  * @exception SWTException <ul>
  *    <li>ERROR_WIDGET_DISPOSED - if the dialog has been disposed</li>
  *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the dialog</li>
  * </ul>
  */
 public int open () {
 	/* Compute the dialog title */
 	/*
 	* Feature in Motif.  It is not possible to set a shell
 	* title to an empty string.  The fix is to set the title
 	* to be a single space.
 	*/
 	String string = title;
 	if (string.length () == 0) string = " "; //$NON-NLS-1$
 	/* Use the character encoding for the default locale */
 	byte [] buffer = Converter.wcsToMbcs (null, string, true);
 	int xmStringPtr = OS.XmStringParseText (
 		buffer,
 		0,
 		OS.XmFONTLIST_DEFAULT_TAG,
 		OS.XmCHARSET_TEXT,
 		null,
 		0,
 		0);
 	/*
 	* Feature in Motif.  The modal values are only hints
 	* to the window manager.  For example Enlightenment treats all modes
 	* as SWT.APPLICATION_MODAL.  The generic Motif
 	* Window Manager honours all modes.
 	*/
 	int dialogStyle = OS.XmDIALOG_MODELESS;
 	if ((style & SWT.PRIMARY_MODAL) != 0) dialogStyle = OS.XmDIALOG_PRIMARY_APPLICATION_MODAL;
 	if ((style & SWT.APPLICATION_MODAL) != 0) dialogStyle = OS.XmDIALOG_FULL_APPLICATION_MODAL;
 	if ((style & SWT.SYSTEM_MODAL) != 0) dialogStyle = OS.XmDIALOG_SYSTEM_MODAL;
 	if (dialogStyle == OS.XmDIALOG_MODELESS) {
 		dialogStyle = OS.XmDIALOG_PRIMARY_APPLICATION_MODAL;
 	}
 	boolean defaultPos = parent.isVisible ();
 	int [] argList = {
 		OS.XmNnoResize, 1,
 		OS.XmNresizePolicy, OS.XmRESIZE_NONE,
 		OS.XmNdialogStyle, dialogStyle,
 		OS.XmNdialogTitle, xmStringPtr,
 		OS.XmNdefaultPosition, defaultPos ? 1 : 0,
 	};
 	int parentHandle = parent.shellHandle;
 	int dialog = createHandle (parentHandle, argList);
 	if (dialog == 0) error (SWT.ERROR_NO_HANDLES);
 	OS.XmStringFree (xmStringPtr);
 	setMessage (dialog);
 	setButtons (dialog);

 	/* Hook the callbacks. */
 	Callback callback = new Callback (this, "activate", 3); //$NON-NLS-1$
 	int address = callback.getAddress ();
 	if (address == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);
 	OS.XtAddCallback (dialog, OS.XmNokCallback, address, OS.XmDIALOG_OK_BUTTON);
 	OS.XtAddCallback (dialog, OS.XmNcancelCallback, address, OS.XmDIALOG_CANCEL_BUTTON);
 	OS.XtAddCallback (dialog, OS.XmNhelpCallback, address, OS.XmDIALOG_HELP_BUTTON);

 	/* Open the dialog and dispatch events. */
 	if (!defaultPos) {
 		OS.XtRealizeWidget (dialog);
 		int[] argList1 = new int[] {
 			OS.XmNwidth, 0,
 			OS.XmNheight, 0,
 		};
 		OS.XtGetValues (dialog, argList1, argList1.length / 2);
 		Monitor monitor = parent.getMonitor ();
 		Rectangle bounds = monitor.getBounds ();
 		int x = bounds.x + (bounds.width - argList1 [1]) / 2;
 		int y = bounds.y + (bounds.height - argList1 [3]) / 2;
 		int[] argList2 = new int[] {
 			OS.XmNx, x,
 			OS.XmNy, y,
 		};
 		OS.XtSetValues (dialog, argList2, argList2.length / 2);
 	}
 	OS.XtManageChild (dialog);

 	// Should be a pure OS message loop (no SWT AppContext)
 	Display display = parent.display;
 	while (OS.XtIsRealized (dialog) && OS.XtIsManaged (dialog))
 		if (!display.readAndDispatch()) display.sleep ();

 	/* Destroy the dialog and update the display. */
 	if (OS.XtIsRealized (dialog)) OS.XtDestroyWidget (dialog);
 	callback.dispose ();

 	if ((style & (SWT.YES | SWT.NO | SWT.CANCEL)) == (SWT.YES | SWT.NO | SWT.CANCEL)) {
 		if (button == OS.XmDIALOG_OK_BUTTON) return SWT.YES;
 		if (button == OS.XmDIALOG_CANCEL_BUTTON) return SWT.NO;
 		return SWT.CANCEL;
 	}
 	if ((style & (SWT.YES | SWT.NO)) == (SWT.YES | SWT.NO)) {
 		return (button == OS.XmDIALOG_OK_BUTTON) ? SWT.YES : SWT.NO;
 	}
 	if ((style & (SWT.OK | SWT.CANCEL)) == (SWT.OK | SWT.CANCEL)) {
 		return (button == OS.XmDIALOG_OK_BUTTON) ? SWT.OK : SWT.CANCEL;
 	}
 	if ((style & SWT.OK) == SWT.OK) return SWT.OK;
 	if ((style & (SWT.RETRY | SWT.CANCEL)) == (SWT.RETRY | SWT.CANCEL)) {
 		return (button == OS.XmDIALOG_OK_BUTTON) ? SWT.RETRY : SWT.CANCEL;
 	}
 	if ((style & (SWT.ABORT | SWT.RETRY | SWT.IGNORE)) == (SWT.ABORT | SWT.RETRY | SWT.IGNORE)) {
 		if (button == OS.XmDIALOG_OK_BUTTON) return SWT.ABORT;
 		if (button == OS.XmDIALOG_CANCEL_BUTTON) return SWT.RETRY;
 		return SWT.IGNORE;
 	}
 	return SWT.CANCEL;
 }
 void setButtons (int dialogHandle) {

 	/* Get the button children */
 	OS.XmMessageBoxGetChild (dialogHandle, OS.XmDIALOG_OK_BUTTON);
 	int cancel = OS.XmMessageBoxGetChild (dialogHandle, OS.XmDIALOG_CANCEL_BUTTON);
 	int help = OS.XmMessageBoxGetChild (dialogHandle, OS.XmDIALOG_HELP_BUTTON);
 	OS.XtUnmanageChild (help);

 	/* Set the button labels */
 	if ((style & (SWT.OK | SWT.CANCEL)) == (SWT.OK | SWT.CANCEL)) return;
 	if ((style & SWT.OK) == SWT.OK) {
 		OS.XtUnmanageChild (cancel);
 		return;
 	}
 	if ((style & (SWT.YES | SWT.NO | SWT.CANCEL)) == (SWT.YES | SWT.NO | SWT.CANCEL)) {
 		OS.XtManageChild (help);
 		/* Use the character encoding for the default locale */
 		byte [] buffer1 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Yes"), true); //$NON-NLS-1$
 		int xmString1 = OS.XmStringParseText (
 			buffer1,
 			0,
 			OS.XmFONTLIST_DEFAULT_TAG,
 			OS.XmCHARSET_TEXT,
 			null,
 			0,
 			0);
 		/* Use the character encoding for the default locale */
 		byte [] buffer2 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_No"), true); //$NON-NLS-1$
 		int xmString2 = OS.XmStringParseText (
 			buffer2,
 			0,
 			OS.XmFONTLIST_DEFAULT_TAG,
 			OS.XmCHARSET_TEXT,
 			null,
 			0,
 			0);
 		/* Use the character encoding for the default locale */
 		byte [] buffer3 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Cancel"), true); //$NON-NLS-1$
 		int xmString3 = OS.XmStringParseText (
 			buffer3,
 			0,
 			OS.XmFONTLIST_DEFAULT_TAG,
 			OS.XmCHARSET_TEXT,
 			null,
 			0,
 			0);
 		int [] argList = {OS.XmNokLabelString, xmString1, OS.XmNcancelLabelString, xmString2, OS.XmNhelpLabelString, xmString3};
 		OS.XtSetValues (dialogHandle, argList, argList.length / 2);
 		OS.XmStringFree (xmString1);  OS.XmStringFree (xmString2);  OS.XmStringFree (xmString3);
 		return;
 	}
 	if ((style & (SWT.YES | SWT.NO)) == (SWT.YES | SWT.NO)) {
 		/* Use the character encoding for the default locale */
 		byte [] buffer1 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Yes"), true); //$NON-NLS-1$
 		int xmString1 = OS.XmStringParseText (
 			buffer1,
 			0,
 			OS.XmFONTLIST_DEFAULT_TAG,
 			OS.XmCHARSET_TEXT,
 			null,
 			0,
 			0);
 		/* Use the character encoding for the default locale */
 		byte [] buffer2 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_No"), true); //$NON-NLS-1$
 		int xmString2 = OS.XmStringParseText (
 			buffer2,
 			0,
 			OS.XmFONTLIST_DEFAULT_TAG,
 			OS.XmCHARSET_TEXT,
 			null,
 			0,
 			0);
 		int [] argList = {OS.XmNokLabelString, xmString1, OS.XmNcancelLabelString, xmString2};
 		OS.XtSetValues (dialogHandle, argList, argList.length / 2);
 		OS.XmStringFree (xmString1);  OS.XmStringFree (xmString2);
 		return;
 	}
 	if ((style & (SWT.RETRY | SWT.CANCEL)) == (SWT.RETRY | SWT.CANCEL)) {
 		/* Use the character encoding for the default locale */
 		byte [] buffer1 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Retry"), true); //$NON-NLS-1$
 		int xmString1 = OS.XmStringParseText (
 			buffer1,
 			0,
 			OS.XmFONTLIST_DEFAULT_TAG,
 			OS.XmCHARSET_TEXT,
 			null,
 			0,
 			0);
 		/* Use the character encoding for the default locale */
 		byte [] buffer2 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Cancel"), true); //$NON-NLS-1$
 		int xmString2 = OS.XmStringParseText (
 			buffer2,
 			0,
 			OS.XmFONTLIST_DEFAULT_TAG,
 			OS.XmCHARSET_TEXT,
 			null,
 			0,
 			0);
 		int [] argList = {OS.XmNokLabelString, xmString1, OS.XmNcancelLabelString, xmString2};
 		OS.XtSetValues (dialogHandle, argList, argList.length / 2);
 		OS.XmStringFree (xmString1);  OS.XmStringFree (xmString2);
 		return;
 	}
 	if ((style & (SWT.ABORT | SWT.RETRY | SWT.IGNORE)) == (SWT.ABORT | SWT.RETRY | SWT.IGNORE)) {
 		OS.XtManageChild (help);
 		/* Use the character encoding for the default locale */
 		byte [] buffer1 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Abort"), true); //$NON-NLS-1$
 		int xmString1 = OS.XmStringParseText (
 			buffer1,
 			0,
 			OS.XmFONTLIST_DEFAULT_TAG,
 			OS.XmCHARSET_TEXT,
 			null,
 			0,
 			0);
 		/* Use the character encoding for the default locale */
 		byte [] buffer2 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Retry"), true); //$NON-NLS-1$
 		int xmString2 = OS.XmStringParseText (
 			buffer2,
 			0,
 			OS.XmFONTLIST_DEFAULT_TAG,
 			OS.XmCHARSET_TEXT,
 			null,
 			0,
 			0);
 		/* Use the character encoding for the default locale */
 		byte [] buffer3 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Ignore"), true); //$NON-NLS-1$
 		int xmString3 = OS.XmStringParseText (
 			buffer3,
 			0,
 			OS.XmFONTLIST_DEFAULT_TAG,
 			OS.XmCHARSET_TEXT,
 			null,
 			0,
 			0);
 		int [] argList = {OS.XmNokLabelString, xmString1, OS.XmNcancelLabelString, xmString2, OS.XmNhelpLabelString, xmString3};
 		OS.XtSetValues (dialogHandle, argList, argList.length / 2);
 		OS.XmStringFree (xmString1);  OS.XmStringFree (xmString2); OS.XmStringFree (xmString3);
 		return;
 	}
 }
 void setMessage (int dialogHandle) {
 	String text = message;
 	int label = OS.XmMessageBoxGetChild (dialogHandle, OS.XmDIALOG_MESSAGE_LABEL);
 	if (label != 0) {
 		int [] argList = {OS.XmNfontList, 0};
 		OS.XtGetValues (label, argList, argList.length / 2);
 		int fontList = argList [1];
 		if (fontList != 0) {
 			Display display = parent.display;
 			int xDisplay = display.xDisplay;
 			int screen = OS.XDefaultScreen (xDisplay);
 			int width = OS.XDisplayWidth (xDisplay, screen);
 			Font font = Font.motif_new (display, fontList);
 			text = display.wrapText (message, font, width * 3 / 5);
 		}
 	}
 	/* Use the character encoding for the default locale */
 	byte [] buffer = Converter.wcsToMbcs (null, text, true);
 	int xmString = OS.XmStringGenerate(buffer, null, OS.XmCHARSET_TEXT, null);
 	int [] argList = {OS.XmNmessageString, xmString};
 	OS.XtSetValues (dialogHandle, argList, argList.length / 2);
 	OS.XmStringFree (xmString);
 }

 /**
  * Sets the dialog's message, which is a description of
  * the purpose for which it was opened. This message will be
  * visible on the dialog while it is open.
  *
  * @param string the message
  *
  * @exception IllegalArgumentException <ul>
  *    <li>ERROR_NULL_ARGUMENT - if the string is null</li>
  * </ul>
  */
 public void setMessage (String string) {
 	if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
 	message = string;
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2009 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.widgets;


	import org.eclipse.swt.internal.*;
	import org.eclipse.swt.internal.motif.*;
	import org.eclipse.swt.*;
	import org.eclipse.swt.graphics.*;

	/**
	* Instances of this class are used to inform or warn the user.
	* <dl>
	* <dt><b>Styles:</b></dt>
	* <dd>ICON_ERROR, ICON_INFORMATION, ICON_QUESTION, ICON_WARNING, ICON_WORKING</dd>
	* <dd>OK, OK \| CANCEL</dd>
	* <dd>YES \| NO, YES \| NO \| CANCEL</dd>
	* <dd>RETRY \| CANCEL</dd>
	* <dd>ABORT \| RETRY \| IGNORE</dd>
	* <dt><b>Events:</b></dt>
	* <dd>(none)</dd>
	* </dl>
	* <p>
	* Note: Only one of the styles ICON_ERROR, ICON_INFORMATION, ICON_QUESTION,
	* ICON_WARNING and ICON_WORKING may be specified.
	* </p><p>
	* IMPORTANT: This class is intended to be subclassed <em>only</em>
	* within the SWT implementation.
	* </p>
	*
	* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample, Dialog tab</a>
	* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
	* @noextend This class is not intended to be subclassed by clients.
	*/
	public class MessageBox extends Dialog {
	int button;
	String message = ""; //$NON-NLS-1$

	/**
	* Constructs a new instance of this class given only its parent.
	*
	* @param parent a shell which will be the parent of the new instance
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
	* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
	* </ul>
	*/
	public MessageBox (Shell parent) {
	this (parent, SWT.OK \| SWT.ICON_INFORMATION \| SWT.APPLICATION_MODAL);
	}

	/**
	* Constructs a new instance of this class given its parent
	* and a style value describing its behavior and appearance.
	* <p>
	* The style value is either one of the style constants defined in
	* class <code>SWT</code> which is applicable to instances of this
	* class, or must be built by <em>bitwise OR</em>'ing together
	* (that is, using the <code>int</code> "\|" operator) two or more
	* of those <code>SWT</code> style constants. The class description
	* lists the style constants that are applicable to the class.
	* Style bits are also inherited from superclasses.
	*
	* @param parent a shell which will be the parent of the new instance
	* @param style the style of dialog to construct
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
	* </ul>
	* @exception SWTException <ul>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
	* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
	* </ul>
	*
	* @see SWT#ICON_ERROR
	* @see SWT#ICON_INFORMATION
	* @see SWT#ICON_QUESTION
	* @see SWT#ICON_WARNING
	* @see SWT#ICON_WORKING
	* @see SWT#OK
	* @see SWT#CANCEL
	* @see SWT#YES
	* @see SWT#NO
	* @see SWT#ABORT
	* @see SWT#RETRY
	* @see SWT#IGNORE
	*/
	public MessageBox (Shell parent, int style) {
	super (parent, checkStyle (parent, checkStyle (style)));
	checkSubclass ();
	}
	int activate (int widget, int client, int call) {
	OS.XtUnmanageChild (widget);
	button = client;
	return 0;
	}
	static int checkStyle (int style) {
	int mask = (SWT.YES \| SWT.NO \| SWT.OK \| SWT.CANCEL \| SWT.ABORT \| SWT.RETRY \| SWT.IGNORE);
	int bits = style & mask;
	if (bits == SWT.OK \|\| bits == SWT.CANCEL \|\| bits == (SWT.OK \| SWT.CANCEL)) return style;
	if (bits == SWT.YES \|\| bits == SWT.NO \|\| bits == (SWT.YES \| SWT.NO) \|\| bits == (SWT.YES \| SWT.NO \| SWT.CANCEL)) return style;
	if (bits == (SWT.RETRY \| SWT.CANCEL) \|\| bits == (SWT.ABORT \| SWT.RETRY \| SWT.IGNORE)) return style;
	style = (style & ~mask) \| SWT.OK;
	return style;
	}
	int createHandle (int parentHandle, int [] argList) {
	if ((style & SWT.ICON_ERROR) != 0) return OS.XmCreateErrorDialog (parentHandle, null, argList, argList.length / 2);
	if ((style & SWT.ICON_INFORMATION) != 0) return OS.XmCreateInformationDialog (parentHandle, null, argList, argList.length / 2);
	if ((style & SWT.ICON_QUESTION) != 0) return OS.XmCreateQuestionDialog (parentHandle, null, argList, argList.length / 2);
	if ((style & SWT.ICON_WARNING) != 0) return OS.XmCreateWarningDialog (parentHandle, null, argList, argList.length / 2);
	if ((style & SWT.ICON_WORKING) != 0) return OS.XmCreateWorkingDialog (parentHandle, null, argList, argList.length / 2);
	return OS.XmCreateMessageDialog (parentHandle, null, argList, argList.length / 2);
	}

	/**
	* Returns the dialog's message, or an empty string if it does not have one.
	* The message is a description of the purpose for which the dialog was opened.
	* This message will be visible in the dialog while it is open.
	*
	* @return the message
	*/
	public String getMessage () {
	return message;
	}

	/**
	* Makes the dialog visible and brings it to the front
	* of the display.
	*
	* @return the ID of the button that was selected to dismiss the
	* message box (e.g. SWT.OK, SWT.CANCEL, etc.)
	*
	* @exception SWTException <ul>
	* <li>ERROR_WIDGET_DISPOSED - if the dialog has been disposed</li>
	* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the dialog</li>
	* </ul>
	*/
	public int open () {
	/* Compute the dialog title */
	/*
	* Feature in Motif. It is not possible to set a shell
	* title to an empty string. The fix is to set the title
	* to be a single space.
	*/
	String string = title;
	if (string.length () == 0) string = " "; //$NON-NLS-1$
	/* Use the character encoding for the default locale */
	byte [] buffer = Converter.wcsToMbcs (null, string, true);
	int xmStringPtr = OS.XmStringParseText (
	buffer,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	/*
	* Feature in Motif. The modal values are only hints
	* to the window manager. For example Enlightenment treats all modes
	* as SWT.APPLICATION_MODAL. The generic Motif
	* Window Manager honours all modes.
	*/
	int dialogStyle = OS.XmDIALOG_MODELESS;
	if ((style & SWT.PRIMARY_MODAL) != 0) dialogStyle = OS.XmDIALOG_PRIMARY_APPLICATION_MODAL;
	if ((style & SWT.APPLICATION_MODAL) != 0) dialogStyle = OS.XmDIALOG_FULL_APPLICATION_MODAL;
	if ((style & SWT.SYSTEM_MODAL) != 0) dialogStyle = OS.XmDIALOG_SYSTEM_MODAL;
	if (dialogStyle == OS.XmDIALOG_MODELESS) {
	dialogStyle = OS.XmDIALOG_PRIMARY_APPLICATION_MODAL;
	}
	boolean defaultPos = parent.isVisible ();
	int [] argList = {
	OS.XmNnoResize, 1,
	OS.XmNresizePolicy, OS.XmRESIZE_NONE,
	OS.XmNdialogStyle, dialogStyle,
	OS.XmNdialogTitle, xmStringPtr,
	OS.XmNdefaultPosition, defaultPos ? 1 : 0,
	};
	int parentHandle = parent.shellHandle;
	int dialog = createHandle (parentHandle, argList);
	if (dialog == 0) error (SWT.ERROR_NO_HANDLES);
	OS.XmStringFree (xmStringPtr);
	setMessage (dialog);
	setButtons (dialog);

	/* Hook the callbacks. */
	Callback callback = new Callback (this, "activate", 3); //$NON-NLS-1$
	int address = callback.getAddress ();
	if (address == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS);
	OS.XtAddCallback (dialog, OS.XmNokCallback, address, OS.XmDIALOG_OK_BUTTON);
	OS.XtAddCallback (dialog, OS.XmNcancelCallback, address, OS.XmDIALOG_CANCEL_BUTTON);
	OS.XtAddCallback (dialog, OS.XmNhelpCallback, address, OS.XmDIALOG_HELP_BUTTON);

	/* Open the dialog and dispatch events. */
	if (!defaultPos) {
	OS.XtRealizeWidget (dialog);
	int[] argList1 = new int[] {
	OS.XmNwidth, 0,
	OS.XmNheight, 0,
	};
	OS.XtGetValues (dialog, argList1, argList1.length / 2);
	Monitor monitor = parent.getMonitor ();
	Rectangle bounds = monitor.getBounds ();
	int x = bounds.x + (bounds.width - argList1 [1]) / 2;
	int y = bounds.y + (bounds.height - argList1 [3]) / 2;
	int[] argList2 = new int[] {
	OS.XmNx, x,
	OS.XmNy, y,
	};
	OS.XtSetValues (dialog, argList2, argList2.length / 2);
	}
	OS.XtManageChild (dialog);

	// Should be a pure OS message loop (no SWT AppContext)
	Display display = parent.display;
	while (OS.XtIsRealized (dialog) && OS.XtIsManaged (dialog))
	if (!display.readAndDispatch()) display.sleep ();

	/* Destroy the dialog and update the display. */
	if (OS.XtIsRealized (dialog)) OS.XtDestroyWidget (dialog);
	callback.dispose ();

	if ((style & (SWT.YES \| SWT.NO \| SWT.CANCEL)) == (SWT.YES \| SWT.NO \| SWT.CANCEL)) {
	if (button == OS.XmDIALOG_OK_BUTTON) return SWT.YES;
	if (button == OS.XmDIALOG_CANCEL_BUTTON) return SWT.NO;
	return SWT.CANCEL;
	}
	if ((style & (SWT.YES \| SWT.NO)) == (SWT.YES \| SWT.NO)) {
	return (button == OS.XmDIALOG_OK_BUTTON) ? SWT.YES : SWT.NO;
	}
	if ((style & (SWT.OK \| SWT.CANCEL)) == (SWT.OK \| SWT.CANCEL)) {
	return (button == OS.XmDIALOG_OK_BUTTON) ? SWT.OK : SWT.CANCEL;
	}
	if ((style & SWT.OK) == SWT.OK) return SWT.OK;
	if ((style & (SWT.RETRY \| SWT.CANCEL)) == (SWT.RETRY \| SWT.CANCEL)) {
	return (button == OS.XmDIALOG_OK_BUTTON) ? SWT.RETRY : SWT.CANCEL;
	}
	if ((style & (SWT.ABORT \| SWT.RETRY \| SWT.IGNORE)) == (SWT.ABORT \| SWT.RETRY \| SWT.IGNORE)) {
	if (button == OS.XmDIALOG_OK_BUTTON) return SWT.ABORT;
	if (button == OS.XmDIALOG_CANCEL_BUTTON) return SWT.RETRY;
	return SWT.IGNORE;
	}
	return SWT.CANCEL;
	}
	void setButtons (int dialogHandle) {

	/* Get the button children */
	OS.XmMessageBoxGetChild (dialogHandle, OS.XmDIALOG_OK_BUTTON);
	int cancel = OS.XmMessageBoxGetChild (dialogHandle, OS.XmDIALOG_CANCEL_BUTTON);
	int help = OS.XmMessageBoxGetChild (dialogHandle, OS.XmDIALOG_HELP_BUTTON);
	OS.XtUnmanageChild (help);

	/* Set the button labels */
	if ((style & (SWT.OK \| SWT.CANCEL)) == (SWT.OK \| SWT.CANCEL)) return;
	if ((style & SWT.OK) == SWT.OK) {
	OS.XtUnmanageChild (cancel);
	return;
	}
	if ((style & (SWT.YES \| SWT.NO \| SWT.CANCEL)) == (SWT.YES \| SWT.NO \| SWT.CANCEL)) {
	OS.XtManageChild (help);
	/* Use the character encoding for the default locale */
	byte [] buffer1 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Yes"), true); //$NON-NLS-1$
	int xmString1 = OS.XmStringParseText (
	buffer1,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	/* Use the character encoding for the default locale */
	byte [] buffer2 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_No"), true); //$NON-NLS-1$
	int xmString2 = OS.XmStringParseText (
	buffer2,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	/* Use the character encoding for the default locale */
	byte [] buffer3 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Cancel"), true); //$NON-NLS-1$
	int xmString3 = OS.XmStringParseText (
	buffer3,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	int [] argList = {OS.XmNokLabelString, xmString1, OS.XmNcancelLabelString, xmString2, OS.XmNhelpLabelString, xmString3};
	OS.XtSetValues (dialogHandle, argList, argList.length / 2);
	OS.XmStringFree (xmString1); OS.XmStringFree (xmString2); OS.XmStringFree (xmString3);
	return;
	}
	if ((style & (SWT.YES \| SWT.NO)) == (SWT.YES \| SWT.NO)) {
	/* Use the character encoding for the default locale */
	byte [] buffer1 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Yes"), true); //$NON-NLS-1$
	int xmString1 = OS.XmStringParseText (
	buffer1,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	/* Use the character encoding for the default locale */
	byte [] buffer2 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_No"), true); //$NON-NLS-1$
	int xmString2 = OS.XmStringParseText (
	buffer2,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	int [] argList = {OS.XmNokLabelString, xmString1, OS.XmNcancelLabelString, xmString2};
	OS.XtSetValues (dialogHandle, argList, argList.length / 2);
	OS.XmStringFree (xmString1); OS.XmStringFree (xmString2);
	return;
	}
	if ((style & (SWT.RETRY \| SWT.CANCEL)) == (SWT.RETRY \| SWT.CANCEL)) {
	/* Use the character encoding for the default locale */
	byte [] buffer1 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Retry"), true); //$NON-NLS-1$
	int xmString1 = OS.XmStringParseText (
	buffer1,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	/* Use the character encoding for the default locale */
	byte [] buffer2 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Cancel"), true); //$NON-NLS-1$
	int xmString2 = OS.XmStringParseText (
	buffer2,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	int [] argList = {OS.XmNokLabelString, xmString1, OS.XmNcancelLabelString, xmString2};
	OS.XtSetValues (dialogHandle, argList, argList.length / 2);
	OS.XmStringFree (xmString1); OS.XmStringFree (xmString2);
	return;
	}
	if ((style & (SWT.ABORT \| SWT.RETRY \| SWT.IGNORE)) == (SWT.ABORT \| SWT.RETRY \| SWT.IGNORE)) {
	OS.XtManageChild (help);
	/* Use the character encoding for the default locale */
	byte [] buffer1 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Abort"), true); //$NON-NLS-1$
	int xmString1 = OS.XmStringParseText (
	buffer1,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	/* Use the character encoding for the default locale */
	byte [] buffer2 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Retry"), true); //$NON-NLS-1$
	int xmString2 = OS.XmStringParseText (
	buffer2,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	/* Use the character encoding for the default locale */
	byte [] buffer3 = Converter.wcsToMbcs (null, SWT.getMessage("SWT_Ignore"), true); //$NON-NLS-1$
	int xmString3 = OS.XmStringParseText (
	buffer3,
	0,
	OS.XmFONTLIST_DEFAULT_TAG,
	OS.XmCHARSET_TEXT,
	null,
	0,
	0);
	int [] argList = {OS.XmNokLabelString, xmString1, OS.XmNcancelLabelString, xmString2, OS.XmNhelpLabelString, xmString3};
	OS.XtSetValues (dialogHandle, argList, argList.length / 2);
	OS.XmStringFree (xmString1); OS.XmStringFree (xmString2); OS.XmStringFree (xmString3);
	return;
	}
	}
	void setMessage (int dialogHandle) {
	String text = message;
	int label = OS.XmMessageBoxGetChild (dialogHandle, OS.XmDIALOG_MESSAGE_LABEL);
	if (label != 0) {
	int [] argList = {OS.XmNfontList, 0};
	OS.XtGetValues (label, argList, argList.length / 2);
	int fontList = argList [1];
	if (fontList != 0) {
	Display display = parent.display;
	int xDisplay = display.xDisplay;
	int screen = OS.XDefaultScreen (xDisplay);
	int width = OS.XDisplayWidth (xDisplay, screen);
	Font font = Font.motif_new (display, fontList);
	text = display.wrapText (message, font, width * 3 / 5);
	}
	}
	/* Use the character encoding for the default locale */
	byte [] buffer = Converter.wcsToMbcs (null, text, true);
	int xmString = OS.XmStringGenerate(buffer, null, OS.XmCHARSET_TEXT, null);
	int [] argList = {OS.XmNmessageString, xmString};
	OS.XtSetValues (dialogHandle, argList, argList.length / 2);
	OS.XmStringFree (xmString);
	}

	/**
	* Sets the dialog's message, which is a description of
	* the purpose for which it was opened. This message will be
	* visible on the dialog while it is open.
	*
	* @param string the message
	*
	* @exception IllegalArgumentException <ul>
	* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
	* </ul>
	*/
	public void setMessage (String string) {
	if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
	message = string;
	}
	}