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

 /*******************************************************************************
  * Copyright (c) 2000, 2019 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.swt.widgets;


 import org.eclipse.swt.*;
 import org.eclipse.swt.internal.*;
 import org.eclipse.swt.internal.gtk.*;
 import org.eclipse.swt.internal.gtk3.*;

 /**
  * 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 <em>not</em> intended to be subclassed.
  * </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 {

 	String message = "";
 	long handle;

 /**
  * 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 ();
 }

 /**
  * 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;
 }

 /**
  * 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;
 }

 /**
  * 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() {
 	long parentHandle = (parent != null) ? parent.topHandle() : 0;
 	int dialogFlags = GTK.GTK_DIALOG_DESTROY_WITH_PARENT;
 	if ((style & (SWT.PRIMARY_MODAL | SWT.APPLICATION_MODAL | SWT.SYSTEM_MODAL)) != 0) {
 		dialogFlags |= GTK.GTK_DIALOG_MODAL;
 	}
 	int messageType = GTK.GTK_MESSAGE_INFO;
 	if ((style & (SWT.ICON_WARNING)) != 0)  messageType = GTK.GTK_MESSAGE_WARNING;
 	if ((style & (SWT.ICON_QUESTION)) != 0) messageType = GTK.GTK_MESSAGE_QUESTION;
 	if ((style & (SWT.ICON_ERROR)) != 0)    messageType = GTK.GTK_MESSAGE_ERROR;

 	byte[] format = Converter.wcsToMbcs("%s", true);
 	byte[] buffer = Converter.wcsToMbcs(title, true);
 	handle = GTK.gtk_message_dialog_new(parentHandle, dialogFlags, messageType, 0, format, buffer);
 	if (handle == 0) error(SWT.ERROR_NO_HANDLES);

 	// Copy parent's icon
 	if (parentHandle != 0) {
 		if (GTK.GTK4) {
 			/*
 			 * TODO: This may not work as we are setting the icon list of the GtkWindow through
 			 * GdkToplevel (which has no way of retrieving the icon list set. See bug 572200.
 			 */
 			long iconName = GTK.gtk_window_get_icon_name(parentHandle);
 			if (iconName != 0) {
 				GTK.gtk_window_set_icon_name(handle, iconName);
 			}
 		} else {
 			long pixbufs = GTK.gtk_window_get_icon_list(parentHandle);
 			if (pixbufs != 0) {
 				GTK3.gtk_window_set_icon_list(handle, pixbufs);
 				OS.g_list_free (pixbufs);
 			}
 		}
 	}

 	Display display = parent != null ? parent.getDisplay() : Display.getCurrent();
 	createButtons(display.getDismissalAlignment());
 	GTK.gtk_message_dialog_format_secondary_text(handle, format, Converter.javaStringToCString(message));

 	display.addIdleProc();
 	Dialog oldModal = null;
 	if (GTK.gtk_window_get_modal(handle)) {
 		oldModal = display.getModalDialog();
 		display.setModalDialog(this);
 	}
 	/*
 	* In order to allow the dialog to be modal of it's
 	* parent shells, it is required to assign the
 	* dialog to the same window group as of the shells.
 	*/
 	long defaultWindowGroup = GTK.gtk_window_get_group(0);
 	GTK.gtk_window_group_add_window(defaultWindowGroup, handle);

 	int signalId = 0;
 	long hookId = 0;
 	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
 		signalId = OS.g_signal_lookup(OS.map, GTK.GTK_TYPE_WIDGET());
 		hookId = OS.g_signal_add_emission_hook(signalId, 0, display.emissionProc, handle, 0);
 	}

 	int response;
 	if (GTK.GTK4) {
 		response = SyncDialogUtil.run(display, handle, false);
 	} else {
 		display.externalEventLoop = true;
 		display.sendPreExternalEventDispatchEvent();
 		response = GTK3.gtk_dialog_run(handle);
 		display.externalEventLoop = false;
 		display.sendPostExternalEventDispatchEvent();
 	}

 	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
 		OS.g_signal_remove_emission_hook(signalId, hookId);
 	}
 	if (GTK.gtk_window_get_modal(handle)) {
 		display.setModalDialog(oldModal);
 	}
 	display.removeIdleProc();

 	if (GTK.GTK4) {
 		GTK.gtk_window_destroy(handle);
 	} else {
 		GTK.gtk_widget_destroy(handle);
 	}

 	return response;
 }

 private void createButtons (int alignment) {
 	if (alignment == SWT.LEFT) {
 		if ((style & SWT.OK) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_OK"), true), SWT.OK);
 		if ((style & SWT.ABORT) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Abort"), true), SWT.ABORT);
 		if ((style & SWT.RETRY) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Retry"), true), SWT.RETRY);
 		if ((style & SWT.YES) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Yes"), true), SWT.YES);
 		if ((style & SWT.NO) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_No"), true), SWT.NO);
 		if ((style & SWT.IGNORE) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Ignore"), true), SWT.IGNORE);
 		if ((style & SWT.CANCEL) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Cancel"), true), SWT.CANCEL);
 	} else {
 		if ((style & SWT.CANCEL) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Cancel"), true), SWT.CANCEL);
 		if ((style & SWT.OK) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_OK"), true), SWT.OK);
 		if ((style & SWT.NO) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_No"), true), SWT.NO);
 		if ((style & SWT.YES) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Yes"), true), SWT.YES);
 		if ((style & SWT.IGNORE) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Ignore"), true), SWT.IGNORE);
 		if ((style & SWT.RETRY) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Retry"), true), SWT.RETRY);
 		if ((style & SWT.ABORT) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Abort"), true), SWT.ABORT);
 	}
 }

 private 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;
 }
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2019 IBM Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.swt.widgets;


	import org.eclipse.swt.*;
	import org.eclipse.swt.internal.*;
	import org.eclipse.swt.internal.gtk.*;
	import org.eclipse.swt.internal.gtk3.*;

	/**
	* 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 <em>not</em> intended to be subclassed.
	* </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 {

	String message = "";
	long handle;

	/**
	* 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 ();
	}

	/**
	* 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;
	}

	/**
	* 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;
	}

	/**
	* 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() {
	long parentHandle = (parent != null) ? parent.topHandle() : 0;
	int dialogFlags = GTK.GTK_DIALOG_DESTROY_WITH_PARENT;
	if ((style & (SWT.PRIMARY_MODAL \| SWT.APPLICATION_MODAL \| SWT.SYSTEM_MODAL)) != 0) {
	dialogFlags \|= GTK.GTK_DIALOG_MODAL;
	}
	int messageType = GTK.GTK_MESSAGE_INFO;
	if ((style & (SWT.ICON_WARNING)) != 0) messageType = GTK.GTK_MESSAGE_WARNING;
	if ((style & (SWT.ICON_QUESTION)) != 0) messageType = GTK.GTK_MESSAGE_QUESTION;
	if ((style & (SWT.ICON_ERROR)) != 0) messageType = GTK.GTK_MESSAGE_ERROR;

	byte[] format = Converter.wcsToMbcs("%s", true);
	byte[] buffer = Converter.wcsToMbcs(title, true);
	handle = GTK.gtk_message_dialog_new(parentHandle, dialogFlags, messageType, 0, format, buffer);
	if (handle == 0) error(SWT.ERROR_NO_HANDLES);

	// Copy parent's icon
	if (parentHandle != 0) {
	if (GTK.GTK4) {
	/*
	* TODO: This may not work as we are setting the icon list of the GtkWindow through
	* GdkToplevel (which has no way of retrieving the icon list set. See bug 572200.
	*/
	long iconName = GTK.gtk_window_get_icon_name(parentHandle);
	if (iconName != 0) {
	GTK.gtk_window_set_icon_name(handle, iconName);
	}
	} else {
	long pixbufs = GTK.gtk_window_get_icon_list(parentHandle);
	if (pixbufs != 0) {
	GTK3.gtk_window_set_icon_list(handle, pixbufs);
	OS.g_list_free (pixbufs);
	}
	}
	}

	Display display = parent != null ? parent.getDisplay() : Display.getCurrent();
	createButtons(display.getDismissalAlignment());
	GTK.gtk_message_dialog_format_secondary_text(handle, format, Converter.javaStringToCString(message));

	display.addIdleProc();
	Dialog oldModal = null;
	if (GTK.gtk_window_get_modal(handle)) {
	oldModal = display.getModalDialog();
	display.setModalDialog(this);
	}
	/*
	* In order to allow the dialog to be modal of it's
	* parent shells, it is required to assign the
	* dialog to the same window group as of the shells.
	*/
	long defaultWindowGroup = GTK.gtk_window_get_group(0);
	GTK.gtk_window_group_add_window(defaultWindowGroup, handle);

	int signalId = 0;
	long hookId = 0;
	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
	signalId = OS.g_signal_lookup(OS.map, GTK.GTK_TYPE_WIDGET());
	hookId = OS.g_signal_add_emission_hook(signalId, 0, display.emissionProc, handle, 0);
	}

	int response;
	if (GTK.GTK4) {
	response = SyncDialogUtil.run(display, handle, false);
	} else {
	display.externalEventLoop = true;
	display.sendPreExternalEventDispatchEvent();
	response = GTK3.gtk_dialog_run(handle);
	display.externalEventLoop = false;
	display.sendPostExternalEventDispatchEvent();
	}

	if ((style & SWT.RIGHT_TO_LEFT) != 0) {
	OS.g_signal_remove_emission_hook(signalId, hookId);
	}
	if (GTK.gtk_window_get_modal(handle)) {
	display.setModalDialog(oldModal);
	}
	display.removeIdleProc();

	if (GTK.GTK4) {
	GTK.gtk_window_destroy(handle);
	} else {
	GTK.gtk_widget_destroy(handle);
	}

	return response;
	}

	private void createButtons (int alignment) {
	if (alignment == SWT.LEFT) {
	if ((style & SWT.OK) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_OK"), true), SWT.OK);
	if ((style & SWT.ABORT) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Abort"), true), SWT.ABORT);
	if ((style & SWT.RETRY) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Retry"), true), SWT.RETRY);
	if ((style & SWT.YES) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Yes"), true), SWT.YES);
	if ((style & SWT.NO) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_No"), true), SWT.NO);
	if ((style & SWT.IGNORE) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Ignore"), true), SWT.IGNORE);
	if ((style & SWT.CANCEL) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Cancel"), true), SWT.CANCEL);
	} else {
	if ((style & SWT.CANCEL) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Cancel"), true), SWT.CANCEL);
	if ((style & SWT.OK) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_OK"), true), SWT.OK);
	if ((style & SWT.NO) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_No"), true), SWT.NO);
	if ((style & SWT.YES) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Yes"), true), SWT.YES);
	if ((style & SWT.IGNORE) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Ignore"), true), SWT.IGNORE);
	if ((style & SWT.RETRY) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Retry"), true), SWT.RETRY);
	if ((style & SWT.ABORT) != 0) GTK.gtk_dialog_add_button(handle, Converter.wcsToMbcs (SWT.getMessage("SWT_Abort"), true), SWT.ABORT);
	}
	}

	private 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;
	}
	}