/*******************************************************************************
* Copyright (c) 2000, 2011 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.*;
import org.eclipse.swt.internal.*;
import org.eclipse.swt.internal.gtk.*;
/**
* 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 = "";
int /*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 () {
int /*long*/ 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;
byte [] buffer = Converter.wcsToMbcs (null, fixPercent (message), true);
handle = OS.gtk_message_dialog_new(parentHandle, dialogFlags, messageType, 0, buffer);
if (handle == 0) SWT.error(SWT.ERROR_NO_HANDLES);
if (parentHandle != 0) {
int /*long*/ pixbufs = OS.gtk_window_get_icon_list (parentHandle);
if (pixbufs != 0) {
OS.gtk_window_set_icon_list (handle, pixbufs);
OS.g_list_free (pixbufs);
}
}
Display display = parent != null ? parent.getDisplay (): Display.getCurrent ();
createButtons (display.getDismissalAlignment ());
buffer = Converter.wcsToMbcs(null, title, true);
OS.gtk_window_set_title(handle,buffer);
display.addIdleProc ();
Dialog oldModal = null;
/*
* 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.
*/
if (OS.GTK_VERSION >= OS.VERSION (2, 10, 0)) {
int /*long*/ group = OS.gtk_window_get_group(0);
OS.gtk_window_group_add_window (group, handle);
}
if (OS.gtk_window_get_modal (handle)) {
oldModal = display.getModalDialog ();
display.setModalDialog (this);
}
int signalId = 0;
int /*long*/ hookId = 0;
if ((style & SWT.RIGHT_TO_LEFT) != 0) {
signalId = OS.g_signal_lookup (OS.map, OS.GTK_TYPE_WIDGET());
hookId = OS.g_signal_add_emission_hook (signalId, 0, display.emissionProc, handle, 0);
}
int response = OS.gtk_dialog_run (handle);
/*
* This call to gdk_threads_leave() is a temporary work around
* to avoid deadlocks when gdk_threads_init() is called by native
* code outside of SWT (i.e AWT, etc). It ensures that the current
* thread leaves the GTK lock acquired by the function above.
*/
OS.gdk_threads_leave();
if ((style & SWT.RIGHT_TO_LEFT) != 0) {
OS.g_signal_remove_emission_hook (signalId, hookId);
}
if (OS.gtk_window_get_modal (handle)) {
display.setModalDialog (oldModal);
}
display.removeIdleProc ();
OS.gtk_widget_destroy (handle);
return response;
}
private void createButtons (int alignment) {
if (alignment == SWT.LEFT) {
if ((style & SWT.OK) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, "gtk-ok", true), SWT.OK);
if ((style & SWT.ABORT) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, SWT.getMessage("SWT_Abort"), true), SWT.ABORT);
if ((style & SWT.RETRY) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, SWT.getMessage("SWT_Retry"), true), SWT.RETRY);
if ((style & SWT.YES) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, "gtk-yes", true), SWT.YES);
if ((style & SWT.NO) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, "gtk-no", true), SWT.NO);
if ((style & SWT.IGNORE) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, SWT.getMessage("SWT_Ignore"), true), SWT.IGNORE);
if ((style & SWT.CANCEL) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, "gtk-cancel", true), SWT.CANCEL);
} else {
if ((style & SWT.CANCEL) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, "gtk-cancel", true), SWT.CANCEL);
if ((style & SWT.OK) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, "gtk-ok", true), SWT.OK);
if ((style & SWT.NO) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, "gtk-no", true), SWT.NO);
if ((style & SWT.YES) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, "gtk-yes", true), SWT.YES);
if ((style & SWT.IGNORE) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, SWT.getMessage("SWT_Ignore"), true), SWT.IGNORE);
if ((style & SWT.RETRY) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, SWT.getMessage("SWT_Retry"), true), SWT.RETRY);
if ((style & SWT.ABORT) != 0) OS.gtk_dialog_add_button(handle, Converter.wcsToMbcs (null, 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;
}
char[] fixPercent (String string) {
int length = string.length ();
char [] text = new char [length];
string.getChars (0, length, text, 0);
int i = 0, j = 0;
char [] result = new char [length * 2];
while (i < length) {
switch (text [i]) {
case '%':
result [j++] = '%';
break;
}
result [j++] = text [i++];
}
return result;
}
}
