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package org.eclipse.swt.widgets;
/*
* Copyright (c) 2000, 2002 IBM Corp. All rights reserved.
* This file is made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*/
import org.eclipse.swt.*;
import org.eclipse.swt.internal.gtk.*;
import org.eclipse.swt.widgets.*;
/**
* Instances of this class are used 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>
*/
public class MessageBox extends Dialog {
String message;
int handle;
/**
* Constructs a new instance of this class given only its
* parent.
* <p>
* Note: Currently, null can be passed in for the parent.
* This has the effect of creating the dialog on the currently active
* display if there is one. If there is no current display, the
* dialog is created on a "default" display. <b>Passing in null as
* the parent is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @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.
* </p>
* Note: Currently, null can be passed in for the parent.
* This has the effect of creating the dialog on the currently active
* display if there is one. If there is no current display, the
* dialog is created on a "default" display. <b>Passing in null as
* the parent is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @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, int style) {
super(parent, checkStyle(style));
checkSubclass ();
}
/**
* Returns 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.
*
* @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
*/
public void setMessage (String string) {
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 () {
int parentHandle = (parent != null)? parent.topHandle() : 0;
int dialogFlags = OS.GTK_DIALOG_DESTROY_WITH_PARENT;
if ((style & (SWT.PRIMARY_MODAL|SWT.APPLICATION_MODAL|SWT.SYSTEM_MODAL)) != 0) {
dialogFlags |= OS.GTK_DIALOG_MODAL;
}
int messageType = OS.GTK_MESSAGE_INFO;
if ((style & (SWT.ICON_WARNING)) != 0) messageType = OS.GTK_MESSAGE_WARNING;
if ((style & (SWT.ICON_QUESTION)) != 0) messageType = OS.GTK_MESSAGE_QUESTION;
if ((style & (SWT.ICON_ERROR)) != 0) messageType = OS.GTK_MESSAGE_ERROR;
handle = OS.gtk_message_dialog_new(parentHandle, dialogFlags, messageType, 0, message);
if (handle==0) SWT.error(SWT.ERROR_NO_HANDLES);
createButtons();
int result = OS.gtk_dialog_run(handle);
OS.gtk_widget_destroy(handle);
return result;
}
private void createButtons() {
if ((style & SWT.OK) != 0) OS.gtk_dialog_add_button(handle, "gtk-ok", SWT.OK);
if ((style & SWT.CANCEL) != 0) OS.gtk_dialog_add_button(handle, "gtk-cancel", SWT.CANCEL);
if ((style & SWT.YES) != 0) OS.gtk_dialog_add_button(handle, "gtk-yes", SWT.YES);
if ((style & SWT.NO) != 0) OS.gtk_dialog_add_button(handle, "gtk-no", SWT.NO);
if ((style & SWT.ABORT) != 0) OS.gtk_dialog_add_button(handle, SWT.getMessage("SWT_Abort"), SWT.ABORT);
if ((style & SWT.RETRY) != 0) OS.gtk_dialog_add_button(handle, SWT.getMessage("SWT_Retry"), SWT.RETRY);
if ((style & SWT.IGNORE) != 0) OS.gtk_dialog_add_button(handle, SWT.getMessage("SWT_Ignore"), SWT.IGNORE);
}
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;
}
}
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