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<title>Qt 4.2: QMessageBox Class Reference</title>
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<td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> · <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a> · <a href="functions.html"><font color="#004faf">Functions</font></a></td>
<td align="right" valign="top" width="230"><a href="http://www.trolltech.com"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></a></td></tr></table><h1 align="center">QMessageBox Class Reference<br /><sup><sup>[<a href="qtgui.html">QtGui</a> module]</sup></sup></h1>
<p>The QMessageBox class provides a modal dialog with a short message, an icon, and buttons laid out depending on the current style. <a href="#details">More...</a></p>
<pre> #include <QMessageBox></pre><p>Inherits <a href="qdialog.html">QDialog</a>.</p>
<ul>
<li><a href="qmessagebox-members.html">List of all members, including inherited members</a></li>
<li><a href="qmessagebox-obsolete.html">Obsolete members</a></li>
<li><a href="qmessagebox-qt3.html">Qt 3 support members</a></li>
</ul>
<a name="public-types"></a>
<h3>Public Types</h3>
<ul>
<li><div class="fn"/>enum <b><a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a></b> { InvalidRole, AcceptRole, RejectRole, DestructiveRole, ..., ResetRole }</li>
<li><div class="fn"/>enum <b><a href="qmessagebox.html#Icon-enum">Icon</a></b> { NoIcon, Question, Information, Warning, Critical }</li>
<li><div class="fn"/>enum <b><a href="qmessagebox.html#StandardButton-enum">StandardButton</a></b> { Ok, Open, Save, Cancel, ..., ButtonMask }</li>
<li><div class="fn"/>flags <b><a href="qmessagebox.html#StandardButton-enum">StandardButtons</a></b></li>
</ul>
<a name="properties"></a>
<h3>Properties</h3>
<p><table width="100%" border="0" cellpadding="0" cellspacing="0">
<tr><td width="45%" valign="top"><ul>
<li><div class="fn"/><b><a href="qmessagebox.html#detailedText-prop">detailedText</a></b> : QString</li>
<li><div class="fn"/><b><a href="qmessagebox.html#icon-prop">icon</a></b> : Icon</li>
<li><div class="fn"/><b><a href="qmessagebox.html#iconPixmap-prop">iconPixmap</a></b> : QPixmap</li>
<li><div class="fn"/><b><a href="qmessagebox.html#informativeText-prop">informativeText</a></b> : QString</li>
</ul></td><td valign="top"><ul>
<li><div class="fn"/><b><a href="qmessagebox.html#standardButtons-prop">standardButtons</a></b> : StandardButtons</li>
<li><div class="fn"/><b><a href="qmessagebox.html#text-prop">text</a></b> : QString</li>
<li><div class="fn"/><b><a href="qmessagebox.html#textFormat-prop">textFormat</a></b> : Qt::TextFormat</li>
</ul>
</td></tr>
</table></p>
<ul>
<li><div class="fn"/>2 properties inherited from <a href="qdialog.html#properties">QDialog</a></li>
<li><div class="fn"/>55 properties inherited from <a href="qwidget.html#properties">QWidget</a></li>
<li><div class="fn"/>1 property inherited from <a href="qobject.html#properties">QObject</a></li>
</ul>
<a name="public-functions"></a>
<h3>Public Functions</h3>
<ul>
<li><div class="fn"/><b><a href="qmessagebox.html#QMessageBox">QMessageBox</a></b> ( QWidget * <i>parent</i> = 0 )</li>
<li><div class="fn"/><b><a href="qmessagebox.html#QMessageBox-2">QMessageBox</a></b> ( Icon <i>icon</i>, const QString & <i>title</i>, const QString & <i>text</i>, StandardButtons <i>buttons</i> = NoButton, QWidget * <i>parent</i> = 0, Qt::WindowFlags <i>f</i> = Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint )</li>
<li><div class="fn"/><b><a href="qmessagebox.html#dtor.QMessageBox">~QMessageBox</a></b> ()</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#addButton">addButton</a></b> ( QAbstractButton * <i>button</i>, ButtonRole <i>role</i> )</li>
<li><div class="fn"/>QPushButton * <b><a href="qmessagebox.html#addButton-2">addButton</a></b> ( const QString & <i>text</i>, ButtonRole <i>role</i> )</li>
<li><div class="fn"/>QPushButton * <b><a href="qmessagebox.html#addButton-3">addButton</a></b> ( StandardButton <i>button</i> )</li>
<li><div class="fn"/>QAbstractButton * <b><a href="qmessagebox.html#button">button</a></b> ( StandardButton <i>which</i> ) const</li>
<li><div class="fn"/>QAbstractButton * <b><a href="qmessagebox.html#clickedButton">clickedButton</a></b> () const</li>
<li><div class="fn"/>QPushButton * <b><a href="qmessagebox.html#defaultButton">defaultButton</a></b> () const</li>
<li><div class="fn"/>QString <b><a href="qmessagebox.html#detailedText-prop">detailedText</a></b> () const</li>
<li><div class="fn"/>QAbstractButton * <b><a href="qmessagebox.html#escapeButton">escapeButton</a></b> () const</li>
<li><div class="fn"/>Icon <b><a href="qmessagebox.html#icon-prop">icon</a></b> () const</li>
<li><div class="fn"/>QPixmap <b><a href="qmessagebox.html#iconPixmap-prop">iconPixmap</a></b> () const</li>
<li><div class="fn"/>QString <b><a href="qmessagebox.html#informativeText-prop">informativeText</a></b> () const</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#removeButton">removeButton</a></b> ( QAbstractButton * <i>button</i> )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#setDefaultButton">setDefaultButton</a></b> ( QPushButton * <i>button</i> )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#detailedText-prop">setDetailedText</a></b> ( const QString & <i>text</i> )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#setEscapeButton">setEscapeButton</a></b> ( QAbstractButton * <i>button</i> )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#icon-prop">setIcon</a></b> ( Icon )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#iconPixmap-prop">setIconPixmap</a></b> ( const QPixmap & <i>pixmap</i> )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#informativeText-prop">setInformativeText</a></b> ( const QString & <i>text</i> )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#standardButtons-prop">setStandardButtons</a></b> ( StandardButtons <i>buttons</i> )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#text-prop">setText</a></b> ( const QString & <i>text</i> )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#textFormat-prop">setTextFormat</a></b> ( Qt::TextFormat <i>format</i> )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#setWindowModality">setWindowModality</a></b> ( Qt::WindowModality <i>windowModality</i> )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#setWindowTitle">setWindowTitle</a></b> ( const QString & <i>title</i> )</li>
<li><div class="fn"/>StandardButton <b><a href="qmessagebox.html#standardButton">standardButton</a></b> ( QAbstractButton * <i>button</i> ) const</li>
<li><div class="fn"/>StandardButtons <b><a href="qmessagebox.html#standardButtons-prop">standardButtons</a></b> () const</li>
<li><div class="fn"/>QString <b><a href="qmessagebox.html#text-prop">text</a></b> () const</li>
<li><div class="fn"/>Qt::TextFormat <b><a href="qmessagebox.html#textFormat-prop">textFormat</a></b> () const</li>
</ul>
<ul>
<li><div class="fn"/>5 public functions inherited from <a href="qdialog.html#public-functions">QDialog</a></li>
<li><div class="fn"/>195 public functions inherited from <a href="qwidget.html#public-functions">QWidget</a></li>
<li><div class="fn"/>29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li>
<li><div class="fn"/>12 public functions inherited from <a href="qpaintdevice.html#public-functions">QPaintDevice</a></li>
</ul>
<a name="static-public-members"></a>
<h3>Static Public Members</h3>
<ul>
<li><div class="fn"/>void <b><a href="qmessagebox.html#about">about</a></b> ( QWidget * <i>parent</i>, const QString & <i>title</i>, const QString & <i>text</i> )</li>
<li><div class="fn"/>void <b><a href="qmessagebox.html#aboutQt">aboutQt</a></b> ( QWidget * <i>parent</i>, const QString & <i>title</i> = QString() )</li>
<li><div class="fn"/>StandardButton <b><a href="qmessagebox.html#critical">critical</a></b> ( QWidget * <i>parent</i>, const QString & <i>title</i>, const QString & <i>text</i>, StandardButtons <i>buttons</i> = Ok, StandardButton <i>defaultButton</i> = NoButton )</li>
<li><div class="fn"/>StandardButton <b><a href="qmessagebox.html#information">information</a></b> ( QWidget * <i>parent</i>, const QString & <i>title</i>, const QString & <i>text</i>, StandardButtons <i>buttons</i> = Ok, StandardButton <i>defaultButton</i> = NoButton )</li>
<li><div class="fn"/>StandardButton <b><a href="qmessagebox.html#question">question</a></b> ( QWidget * <i>parent</i>, const QString & <i>title</i>, const QString & <i>text</i>, StandardButtons <i>buttons</i> = Ok, StandardButton <i>defaultButton</i> = NoButton )</li>
<li><div class="fn"/>StandardButton <b><a href="qmessagebox.html#warning">warning</a></b> ( QWidget * <i>parent</i>, const QString & <i>title</i>, const QString & <i>text</i>, StandardButtons <i>buttons</i> = Ok, StandardButton <i>defaultButton</i> = NoButton )</li>
</ul>
<ul>
<li><div class="fn"/>4 static public members inherited from <a href="qwidget.html#static-public-members">QWidget</a></li>
<li><div class="fn"/>5 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li>
</ul>
<a name="macros"></a>
<h3>Macros</h3>
<ul>
<li><div class="fn"/><b><a href="qmessagebox.html#QT_REQUIRE_VERSION">QT_REQUIRE_VERSION</a></b> ( int <i>argc</i>, char ** <i>argv</i>, const char * <i>version</i> )</li>
</ul>
<h3>Additional Inherited Members</h3>
<ul>
<li><div class="fn"/>4 public slots inherited from <a href="qdialog.html#public-slots">QDialog</a></li>
<li><div class="fn"/>19 public slots inherited from <a href="qwidget.html#public-slots">QWidget</a></li>
<li><div class="fn"/>1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li>
<li><div class="fn"/>3 signals inherited from <a href="qdialog.html#signals">QDialog</a></li>
<li><div class="fn"/>1 signal inherited from <a href="qwidget.html#signals">QWidget</a></li>
<li><div class="fn"/>1 signal inherited from <a href="qobject.html#signals">QObject</a></li>
<li><div class="fn"/>38 protected functions inherited from <a href="qwidget.html#protected-functions">QWidget</a></li>
<li><div class="fn"/>7 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li>
<li><div class="fn"/>1 protected function inherited from <a href="qpaintdevice.html#protected-functions">QPaintDevice</a></li>
<li><div class="fn"/>1 protected slot inherited from <a href="qwidget.html#protected-slots">QWidget</a></li>
</ul>
<a name="details"></a>
<hr />
<h2>Detailed Description</h2>
<p>The QMessageBox class provides a modal dialog with a short message, an icon, and buttons laid out depending on the current style.</p>
<p>Message boxes are used to provide informative messages and to ask simple questions.</p>
<p>QMessageBox supports four severity levels, indicated by an icon:</p>
<p><table align="center" cellpadding="2" cellspacing="1" border="0">
<tr valign="top" class="odd"><td><p align="center"><img src="images/qmessagebox-quest.png" /></p></td><td><a href="qmessagebox.html#Icon-enum">Question</a></td><td>For message boxes that ask a question as part of normal operation. Some style guides recommend using Information for this purpose.</td></tr>
<tr valign="top" class="even"><td><p align="center"><img src="images/qmessagebox-info.png" /></p></td><td><a href="qmessagebox.html#Icon-enum">Information</a></td><td>For message boxes that are part of normal operation.</td></tr>
<tr valign="top" class="odd"><td><p align="center"><img src="images/qmessagebox-warn.png" /></p></td><td><a href="qmessagebox.html#Icon-enum">Warning</a></td><td>For message boxes that tell the user about unusual errors.</td></tr>
<tr valign="top" class="even"><td><p align="center"><img src="images/qmessagebox-crit.png" /></p></td><td><a href="qmessagebox.html#Icon-enum">Critical</a></td><td>For message boxes that tell the user about critical errors.</td></tr>
</table></p>
<p>The easiest way to pop up a message box in Qt is to call one of the static functions <a href="qmessagebox.html#information">QMessageBox::information</a>(), <a href="qmessagebox.html#question">QMessageBox::question</a>(), <a href="qmessagebox.html#critical">QMessageBox::critical</a>(), and <a href="qmessagebox.html#warning">QMessageBox::warning</a>(). For example:</p>
<pre> int ret = QMessageBox::warning(this, tr("My Application"),
tr("The document has been modified.\n"
"Do you want to save your changes?"),
QMessageBox::Save | QMessageBox::Discard
| QMessageBox::Cancel,
QMessageBox::Save);</pre>
<p>The order of the buttons is platform-dependent.</p>
<p>The text part of all message box messages can be either rich text or plain text. With certain strings that contain XML meta characters, the auto-rich text detection may fail, interpreting plain text incorrectly as rich text. In these rare cases, use <a href="qt.html#convertFromPlainText">Qt::convertFromPlainText</a>() to convert your plain text string to a visually equivalent rich text string or set the text format explicitly with <a href="qmessagebox.html#textFormat-prop">setTextFormat</a>().</p>
<p>Note that the Microsoft Windows User Interface Guidelines recommend using the application name as the window's title.</p>
<p>If none of the standard message boxes is suitable, you can create a QMessageBox from scratch. You can use <a href="qmessagebox.html#addButton">addButton</a>() to add the standard buttons in <a href="qmessagebox.html#StandardButton-enum">StandardButton</a>. <a href="qmessagebox.html#addButton">addButton</a>() has an additional overload, that takes a custom text and the button role as an argument. The button role is used to automatically determine the position of the button within the dialog box.</p>
<p>When using an instance of QMessageBox with standard buttons, you can test the return value of <a href="qdialog.html#exec">exec</a>() to determine which button was clicked. For example,</p>
<pre> QMessageBox msgBox;
msgBox.setStandardButtons(QMessageBox::Yes | QMessageBox::No);
switch (msgBox.exec()) {
case QMessageBox::Yes:
<span class="comment">// yes was clicked</span>
break;
case QMessageBox::No:
<span class="comment">// no was clicked</span>
break;
default:
<span class="comment">// should never be reached</span>
break;
}</pre>
<p>When using an instance of QMessageBox with custom buttons, you can test the value of <a href="qmessagebox.html#clickedButton">clickedButton</a>() after calling <a href="qdialog.html#exec">exec</a>(). For example,</p>
<pre> QMessageBox msgBox;
QPushButton *connectButton = msgBox.addButton(tr("Connect"), QMessageBox::ActionRole);
QPushButton *abortButton = msgBox.addButton(QMessageBox::Abort);
msgBox.exec();
if (msgBox.clickedButton() == connectButton) {
<span class="comment">// connect</span>
} else if (msgBox.clickedButton() == abortButton) {
<span class="comment">// abort</span>
}</pre>
<p>The <a href="qmessagebox.html#text-prop">text</a>(), <a href="qmessagebox.html#icon-prop">icon</a>() and <a href="qmessagebox.html#iconPixmap-prop">iconPixmap</a>() functions provide access to the current text and pixmap of the message box. The <a href="qmessagebox.html#text-prop">setText</a>(), <a href="qmessagebox.html#icon-prop">setIcon</a>() and <a href="qmessagebox.html#iconPixmap-prop">setIconPixmap</a>() let you change it. The difference between <a href="qmessagebox.html#icon-prop">setIcon</a>() and <a href="qmessagebox.html#iconPixmap-prop">setIconPixmap</a>() is that the former accepts a <a href="qmessagebox.html#Icon-enum">QMessageBox::Icon</a> and can be used to set standard icons, whereas the latter accepts a <a href="qpixmap.html">QPixmap</a> and can be used to set custom icons.</p>
<p><a href="qmessagebox-obsolete.html#setButtonText">setButtonText</a>() and <a href="qmessagebox-obsolete.html#buttonText">buttonText</a>() provide access to the buttons.</p>
<p>QMessageBox has no signals or slots.</p>
<p>The <a href="dialogs-standarddialogs.html">Standard Dialogs</a> example shows how to use QMessageBox as well as other built-in Qt dialogs.</p>
<p>See also <a href="qdialogbuttonbox.html">QDialogButtonBox</a>, <a href="guibooks.html#fowler">GUI Design Handbook: Message Box</a>, <a href="dialogs-standarddialogs.html">Standard Dialogs Example</a>, and <a href="mainwindows-application.html">Application Example</a>.</p>
<hr />
<h2>Member Type Documentation</h2>
<h3 class="fn"><a name="ButtonRole-enum"></a>enum QMessageBox::ButtonRole</h3>
<p>This enum describes the roles that can be used to describe buttons in the button box. Combinations of these roles are as flags used to describe different aspects of their behavior.</p>
<p><table border="1" cellpadding="2" cellspacing="1" width="100%">
<tr><th width="25%">Constant</th><th width="15%">Value</th><th width="60%">Description</th></tr>
<tr><td valign="top"><tt>QMessageBox::InvalidRole</tt></td><td align="center" valign="top"><tt>-1</tt></td><td valign="top">The button is invalid.</td></tr>
<tr><td valign="top"><tt>QMessageBox::AcceptRole</tt></td><td align="center" valign="top"><tt>0</tt></td><td valign="top">Clicking the button causes the dialog to be accepted (e.g. OK).</td></tr>
<tr><td valign="top"><tt>QMessageBox::RejectRole</tt></td><td align="center" valign="top"><tt>1</tt></td><td valign="top">Clicking the button causes the dialog to be rejected (e.g. Cancel).</td></tr>
<tr><td valign="top"><tt>QMessageBox::DestructiveRole</tt></td><td align="center" valign="top"><tt>2</tt></td><td valign="top">Clicking the button causes a destructive change (e.g. for Discarding Changes).</td></tr>
<tr><td valign="top"><tt>QMessageBox::ActionRole</tt></td><td align="center" valign="top"><tt>3</tt></td><td valign="top">Clicking the button causes changes to the elements in the dialog (e.g. reset all the values or read defaults).</td></tr>
<tr><td valign="top"><tt>QMessageBox::HelpRole</tt></td><td align="center" valign="top"><tt>4</tt></td><td valign="top">The button can be clicked to request help.</td></tr>
<tr><td valign="top"><tt>QMessageBox::YesRole</tt></td><td align="center" valign="top"><tt>5</tt></td><td valign="top">The button is a "Yes"-like button.</td></tr>
<tr><td valign="top"><tt>QMessageBox::NoRole</tt></td><td align="center" valign="top"><tt>6</tt></td><td valign="top">The button is a "No"-like button.</td></tr>
<tr><td valign="top"><tt>QMessageBox::ApplyRole</tt></td><td align="center" valign="top"><tt>8</tt></td><td valign="top">The button applies current changes.</td></tr>
<tr><td valign="top"><tt>QMessageBox::ResetRole</tt></td><td align="center" valign="top"><tt>7</tt></td><td valign="top">The button resets the dialog's fields to default values.</td></tr>
</table></p>
<p>See also <a href="qmessagebox.html#StandardButton-enum">StandardButton</a>.</p>
<h3 class="fn"><a name="Icon-enum"></a>enum QMessageBox::Icon</h3>
<p>This enum has the following values:</p>
<p><table border="1" cellpadding="2" cellspacing="1" width="100%">
<tr><th width="25%">Constant</th><th width="15%">Value</th><th width="60%">Description</th></tr>
<tr><td valign="top"><tt>QMessageBox::NoIcon</tt></td><td align="center" valign="top"><tt>0</tt></td><td valign="top">the message box does not have any icon.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Question</tt></td><td align="center" valign="top"><tt>4</tt></td><td valign="top">an icon indicating that the message is asking a question.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Information</tt></td><td align="center" valign="top"><tt>1</tt></td><td valign="top">an icon indicating that the message is nothing out of the ordinary.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Warning</tt></td><td align="center" valign="top"><tt>2</tt></td><td valign="top">an icon indicating that the message is a warning, but can be dealt with.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Critical</tt></td><td align="center" valign="top"><tt>3</tt></td><td valign="top">an icon indicating that the message represents a critical problem.</td></tr>
</table></p>
<h3 class="flags"><a name="StandardButton-enum"></a>enum QMessageBox::StandardButton<br />flags QMessageBox::StandardButtons</h3>
<p>These enums describe flags for standard buttons. Each button has a defined <a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a>.</p>
<p><table border="1" cellpadding="2" cellspacing="1" width="100%">
<tr><th width="25%">Constant</th><th width="15%">Value</th><th width="60%">Description</th></tr>
<tr><td valign="top"><tt>QMessageBox::Ok</tt></td><td align="center" valign="top"><tt>0x00000400</tt></td><td valign="top">An "OK" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Open</tt></td><td align="center" valign="top"><tt>0x00002000</tt></td><td valign="top">A "Open" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Save</tt></td><td align="center" valign="top"><tt>0x00000800</tt></td><td valign="top">A "Save" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Cancel</tt></td><td align="center" valign="top"><tt>0x00400000</tt></td><td valign="top">A "Cancel" button defined with the <a href="qmessagebox.html#ButtonRole-enum">RejectRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Close</tt></td><td align="center" valign="top"><tt>0x00200000</tt></td><td valign="top">A "Close" button defined with the <a href="qmessagebox.html#ButtonRole-enum">RejectRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Discard</tt></td><td align="center" valign="top"><tt>0x00800000</tt></td><td valign="top">A "Discard" or "Don't Save" button, depending on the platform, defined with the <a href="qmessagebox.html#ButtonRole-enum">DestructiveRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Apply</tt></td><td align="center" valign="top"><tt>0x02000000</tt></td><td valign="top">An "Apply" button defined with the <a href="qmessagebox.html#ButtonRole-enum">ApplyRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Reset</tt></td><td align="center" valign="top"><tt>0x04000000</tt></td><td valign="top">A "Reset" button defined with the <a href="qmessagebox.html#ButtonRole-enum">ResetRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::RestoreDefaults</tt></td><td align="center" valign="top"><tt>0x08000000</tt></td><td valign="top">A "Restore Defaults" button defined with the <a href="qmessagebox.html#ButtonRole-enum">ResetRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Help</tt></td><td align="center" valign="top"><tt>0x01000000</tt></td><td valign="top">A "Help" button defined with the <a href="qmessagebox.html#ButtonRole-enum">HelpRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::SaveAll</tt></td><td align="center" valign="top"><tt>0x00001000</tt></td><td valign="top">A "Save All" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Yes</tt></td><td align="center" valign="top"><tt>0x00004000</tt></td><td valign="top">A "Yes" button defined with the <a href="qmessagebox.html#ButtonRole-enum">YesRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::YesToAll</tt></td><td align="center" valign="top"><tt>0x00008000</tt></td><td valign="top">A "Yes to All" button defined with the <a href="qmessagebox.html#ButtonRole-enum">YesRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::No</tt></td><td align="center" valign="top"><tt>0x00010000</tt></td><td valign="top">A "No" button defined with the <a href="qmessagebox.html#ButtonRole-enum">NoRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::NoToAll</tt></td><td align="center" valign="top"><tt>0x00020000</tt></td><td valign="top">A "No to All" button defined with the <a href="qmessagebox.html#ButtonRole-enum">NoRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Abort</tt></td><td align="center" valign="top"><tt>0x00040000</tt></td><td valign="top">An "Abort" button defined with the <a href="qmessagebox.html#ButtonRole-enum">RejectRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Retry</tt></td><td align="center" valign="top"><tt>0x00080000</tt></td><td valign="top">A "Retry" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Ignore</tt></td><td align="center" valign="top"><tt>0x00100000</tt></td><td valign="top">An "Ignore" button defined with the <a href="qmessagebox.html#ButtonRole-enum">AcceptRole</a>.</td></tr>
<tr><td valign="top"><tt>QMessageBox::NoButton</tt></td><td align="center" valign="top"><tt>0x00000000</tt></td><td valign="top">An invalid button.</td></tr>
</table></p>
<p>The following values are obsolete:</p>
<p><table border="1" cellpadding="2" cellspacing="1" width="100%">
<tr><th width="25%">Constant</th><th width="15%">Value</th><th width="60%">Description</th></tr>
<tr><td valign="top"><tt>QMessageBox::YesAll</tt></td><td align="center" valign="top"><tt>YesToAll</tt></td><td valign="top">Use YesToAll instead.</td></tr>
<tr><td valign="top"><tt>QMessageBox::NoAll</tt></td><td align="center" valign="top"><tt>NoToAll</tt></td><td valign="top">Use NoToAll instead.</td></tr>
<tr><td valign="top"><tt>QMessageBox::Default</tt></td><td align="center" valign="top"><tt>0x00000100</tt></td><td valign="top">Use the <tt>defaultButton</tt> argument of <a href="qmessagebox.html#information">information</a>(), <a href="qmessagebox.html#warning">warning</a>(), etc. instead, or call <a href="qmessagebox.html#setDefaultButton">setDefaultButton</a>().</td></tr>
<tr><td valign="top"><tt>QMessageBox::Escape</tt></td><td align="center" valign="top"><tt>0x00000200</tt></td><td valign="top">Call <a href="qmessagebox.html#setEscapeButton">setEscapeButton</a>() instead.</td></tr>
<tr><td valign="top"><tt>QMessageBox::FlagMask</tt></td><td align="center" valign="top"><tt>0x00000300</tt></td><td valign="top"> </td></tr>
<tr><td valign="top"><tt>QMessageBox::ButtonMask</tt></td><td align="center" valign="top"><tt>~FlagMask</tt></td><td valign="top"> </td></tr>
</table></p>
<p>This enum was introduced in Qt 4.2.</p>
<p>The StandardButtons type is a typedef for <a href="qflags.html">QFlags</a><StandardButton>. It stores an OR combination of StandardButton values.</p>
<p>See also <a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a> and <a href="qmessagebox.html#standardButtons-prop">standardButtons</a>.</p>
<hr />
<h2>Property Documentation</h2>
<h3 class="fn"><a name="detailedText-prop"></a>detailedText : <a href="qstring.html">QString</a></h3>
<p>This property holds the text to be displayed in the details area.</p>
<p>The text will be interpreted as a plain text. The default value of this property is an empty string.</p>
<p>This property was introduced in Qt 4.2.</p>
<p>Access functions:</p>
<ul>
<li><div class="fn"/><b>QString detailedText () const</b></li>
<li><div class="fn"/><b>void setDetailedText ( const QString & <i>text</i> )</b></li>
</ul>
<h3 class="fn"><a name="icon-prop"></a>icon : <a href="qmessagebox.html#Icon-enum">Icon</a></h3>
<p>This property holds the message box's icon.</p>
<p>The icon of the message box can be one of the following predefined icons:</p>
<ul>
<li><a href="qmessagebox.html#Icon-enum">QMessageBox::NoIcon</a></li>
<li><a href="qmessagebox.html#Icon-enum">QMessageBox::Question</a></li>
<li><a href="qmessagebox.html#Icon-enum">QMessageBox::Information</a></li>
<li><a href="qmessagebox.html#Icon-enum">QMessageBox::Warning</a></li>
<li><a href="qmessagebox.html#Icon-enum">QMessageBox::Critical</a></li>
</ul>
<p>The actual pixmap used for displaying the icon depends on the current <a href="qwidget.html#style">GUI style</a>. You can also set a custom pixmap icon using the <a href="qmessagebox.html#iconPixmap-prop">QMessageBox::iconPixmap</a> property. The default icon is <a href="qmessagebox.html#Icon-enum">QMessageBox::NoIcon</a>.</p>
<p>Access functions:</p>
<ul>
<li><div class="fn"/><b>Icon icon () const</b></li>
<li><div class="fn"/><b>void setIcon ( Icon )</b></li>
</ul>
<p>See also <a href="qmessagebox.html#iconPixmap-prop">iconPixmap</a>.</p>
<h3 class="fn"><a name="iconPixmap-prop"></a>iconPixmap : <a href="qpixmap.html">QPixmap</a></h3>
<p>This property holds the current icon.</p>
<p>The icon currently used by the message box. Note that it's often hard to draw one pixmap that looks appropriate in all GUI styles; you may want to supply a different pixmap for each platform.</p>
<p>Access functions:</p>
<ul>
<li><div class="fn"/><b>QPixmap iconPixmap () const</b></li>
<li><div class="fn"/><b>void setIconPixmap ( const QPixmap & <i>pixmap</i> )</b></li>
</ul>
<p>See also <a href="qmessagebox.html#icon-prop">icon</a>.</p>
<h3 class="fn"><a name="informativeText-prop"></a>informativeText : <a href="qstring.html">QString</a></h3>
<p>This property holds the informative text that provides a fuller description for the message.</p>
<p>Infromative text can be used to expand upon the <a href="qmessagebox.html#text-prop">text</a>() to give more information to the user. On the Mac, this text appears in small system font below the <a href="qmessagebox.html#text-prop">text</a>(). On other platforms, it is simply appended to the existing text.</p>
<p>This property was introduced in Qt 4.2.</p>
<p>Access functions:</p>
<ul>
<li><div class="fn"/><b>QString informativeText () const</b></li>
<li><div class="fn"/><b>void setInformativeText ( const QString & <i>text</i> )</b></li>
</ul>
<h3 class="fn"><a name="standardButtons-prop"></a>standardButtons : <a href="qmessagebox.html#StandardButton-enum">StandardButtons</a></h3>
<p>This property holds collection of standard buttons in the message box.</p>
<p>This property controls which standard buttons are used by the message box.</p>
<p>This property was introduced in Qt 4.2.</p>
<p>Access functions:</p>
<ul>
<li><div class="fn"/><b>StandardButtons standardButtons () const</b></li>
<li><div class="fn"/><b>void setStandardButtons ( StandardButtons <i>buttons</i> )</b></li>
</ul>
<p>See also <a href="qmessagebox.html#addButton">addButton</a>().</p>
<h3 class="fn"><a name="text-prop"></a>text : <a href="qstring.html">QString</a></h3>
<p>This property holds the message box text to be displayed.</p>
<p>The text will be interpreted either as a plain text or as rich text, depending on the text format setting (<a href="qmessagebox.html#textFormat-prop">QMessageBox::textFormat</a>). The default setting is <a href="qt.html#TextFormat-enum">Qt::AutoText</a>, i.e. the message box will try to auto-detect the format of the text.</p>
<p>The default value of this property is an empty string.</p>
<p>Access functions:</p>
<ul>
<li><div class="fn"/><b>QString text () const</b></li>
<li><div class="fn"/><b>void setText ( const QString & <i>text</i> )</b></li>
</ul>
<p>See also <a href="qmessagebox.html#textFormat-prop">textFormat</a>.</p>
<h3 class="fn"><a name="textFormat-prop"></a>textFormat : <a href="qt.html#TextFormat-enum">Qt::TextFormat</a></h3>
<p>This property holds the format of the text displayed by the message box.</p>
<p>The current text format used by the message box. See the <a href="qt.html#TextFormat-enum">Qt::TextFormat</a> enum for an explanation of the possible options.</p>
<p>The default format is <a href="qt.html#TextFormat-enum">Qt::AutoText</a>.</p>
<p>Access functions:</p>
<ul>
<li><div class="fn"/><b>Qt::TextFormat textFormat () const</b></li>
<li><div class="fn"/><b>void setTextFormat ( Qt::TextFormat <i>format</i> )</b></li>
</ul>
<p>See also <a href="qmessagebox.html#text-prop">setText</a>().</p>
<hr />
<h2>Member Function Documentation</h2>
<h3 class="fn"><a name="QMessageBox"></a>QMessageBox::QMessageBox ( <a href="qwidget.html">QWidget</a> * <i>parent</i> = 0 )</h3>
<p>Constructs a message box with no text and no buttons.</p>
<p>If <i>parent</i> is 0, the message box becomes an application-global modal dialog box. If <i>parent</i> is a widget, the message box becomes modal relative to <i>parent</i>.</p>
<p>The <i>parent</i> argument is passed to the <a href="qdialog.html">QDialog</a> constructor.</p>
<h3 class="fn"><a name="QMessageBox-2"></a>QMessageBox::QMessageBox ( <a href="qmessagebox.html#Icon-enum">Icon</a> <i>icon</i>, const <a href="qstring.html">QString</a> & <i>title</i>, const <a href="qstring.html">QString</a> & <i>text</i>, <a href="qmessagebox.html#StandardButton-enum">StandardButtons</a> <i>buttons</i> = NoButton, <a href="qwidget.html">QWidget</a> * <i>parent</i> = 0, <a href="qt.html#WindowType-enum">Qt::WindowFlags</a> <i>f</i> = Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint )</h3>
<p>Constructs a message box with the given <i>icon</i>, <i>title</i>, <i>text</i>, and standard <i>buttons</i>. (Buttons can also be added at any time using <a href="qmessagebox.html#addButton">addButton</a>().)</p>
<p>If <i>parent</i> is 0, the message box becomes an application-global modal dialog box. If <i>parent</i> is a widget, the message box becomes modal relative to <i>parent</i>.</p>
<p>The <i>parent</i> and <i>f</i> arguments are passed to the <a href="qdialog.html">QDialog</a> constructor.</p>
<p>See also <a href="qmessagebox.html#setWindowTitle">setWindowTitle</a>(), <a href="qmessagebox.html#text-prop">setText</a>(), <a href="qmessagebox.html#icon-prop">setIcon</a>(), and <a href="qmessagebox.html#standardButtons-prop">setStandardButtons</a>().</p>
<h3 class="fn"><a name="dtor.QMessageBox"></a>QMessageBox::~QMessageBox ()</h3>
<p>Destroys the message box.</p>
<h3 class="fn"><a name="about"></a>void QMessageBox::about ( <a href="qwidget.html">QWidget</a> * <i>parent</i>, const <a href="qstring.html">QString</a> & <i>title</i>, const <a href="qstring.html">QString</a> & <i>text</i> ) <tt> [static]</tt></h3>
<p>Displays a simple about box with title <i>title</i> and text <i>text</i>. The about box's parent is <i>parent</i>.</p>
<p>about() looks for a suitable icon in four locations:</p>
<ol type="1">
<li>It prefers <a href="qwidget.html#windowIcon-prop">parent->icon()</a> if that exists.</li>
<li>If not, it tries the top-level widget containing <i>parent</i>.</li>
<li>If that fails, it tries the <a href="qapplication.html#activeWindow">active window.</a></li>
<li>As a last resort it uses the Information icon.</li>
</ol>
<p>The about box has a single button labelled "OK".</p>
<p>See also <a href="qwidget.html#windowIcon-prop">QWidget::windowIcon</a>() and <a href="qapplication.html#activeWindow">QApplication::activeWindow</a>().</p>
<h3 class="fn"><a name="aboutQt"></a>void QMessageBox::aboutQt ( <a href="qwidget.html">QWidget</a> * <i>parent</i>, const <a href="qstring.html">QString</a> & <i>title</i> = QString() ) <tt> [static]</tt></h3>
<p>Displays a simple message box about Qt, with the given <i>title</i> and centered over <i>parent</i> (if <i>parent</i> is not 0). The message includes the version number of Qt being used by the application.</p>
<p>This is useful for inclusion in the Help menu of an application. See the examples/menu/menu.cpp example.</p>
<p><a href="qapplication.html">QApplication</a> provides this functionality as a slot.</p>
<p>See also <a href="qapplication.html#aboutQt">QApplication::aboutQt</a>().</p>
<h3 class="fn"><a name="addButton"></a>void QMessageBox::addButton ( <a href="qabstractbutton.html">QAbstractButton</a> * <i>button</i>, <a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a> <i>role</i> )</h3>
<p>Adds the given <i>button</i> to the message box with the specified <i>role</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#removeButton">removeButton</a>(), <a href="qmessagebox.html#button">button</a>(), and <a href="qmessagebox.html#standardButtons-prop">setStandardButtons</a>().</p>
<h3 class="fn"><a name="addButton-2"></a><a href="qpushbutton.html">QPushButton</a> * QMessageBox::addButton ( const <a href="qstring.html">QString</a> & <i>text</i>, <a href="qmessagebox.html#ButtonRole-enum">ButtonRole</a> <i>role</i> )</h3>
<p>This is an overloaded member function, provided for convenience.</p>
<p>Creates a button with the given <i>text</i>, adds it to the message box for the specified <i>role</i>, and returns it.</p>
<p>This function was introduced in Qt 4.2.</p>
<h3 class="fn"><a name="addButton-3"></a><a href="qpushbutton.html">QPushButton</a> * QMessageBox::addButton ( <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>button</i> )</h3>
<p>This is an overloaded member function, provided for convenience.</p>
<p>Adds a standard <i>button</i> to the message box if it is valid to do so, and returns the push button.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#standardButtons-prop">setStandardButtons</a>().</p>
<h3 class="fn"><a name="button"></a><a href="qabstractbutton.html">QAbstractButton</a> * QMessageBox::button ( <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>which</i> ) const</h3>
<p>Returns a pointer corresponding to the standard button <i>which</i>, or 0 if the standard button doesn't exist in this message box.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#standardButtons-prop">standardButtons</a> and <a href="qmessagebox.html#standardButton">standardButton</a>().</p>
<h3 class="fn"><a name="clickedButton"></a><a href="qabstractbutton.html">QAbstractButton</a> * QMessageBox::clickedButton () const</h3>
<p>Returns the button that was clicked by the user, or 0 if the user hit the <b>Escape</b> key and no <a href="qmessagebox.html#setEscapeButton">escape button</a> was set.</p>
<p>If <a href="qdialog.html#exec">exec</a>() hasn't been called yet, returns 0.</p>
<p>Example:</p>
<pre> QMessageBox messageBox(this);
QAbstractButton *disconnectButton =
messageBox.addButton(tr("Disconnect"), QMessageBox::ActionRole);
...
messageBox.exec();
if (messageBox.clickedButton() == disconnectButton) {
...
}</pre>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#standardButton">standardButton</a>() and <a href="qmessagebox.html#button">button</a>().</p>
<h3 class="fn"><a name="critical"></a><a href="qmessagebox.html#StandardButton-enum">StandardButton</a> QMessageBox::critical ( <a href="qwidget.html">QWidget</a> * <i>parent</i>, const <a href="qstring.html">QString</a> & <i>title</i>, const <a href="qstring.html">QString</a> & <i>text</i>, <a href="qmessagebox.html#StandardButton-enum">StandardButtons</a> <i>buttons</i> = Ok, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>defaultButton</i> = NoButton ) <tt> [static]</tt></h3>
<p>Opens a critical message box with the title <i>title</i> and the text <i>text</i>. The standard buttons <i>buttons</i> is added to the message box. <i>defaultButton</i> specifies the button be used as the defaultButton. If the <i>defaultButton</i> is set to <a href="qmessagebox.html#StandardButton-enum">QMessageBox::NoButton</a>, <a href="qmessagebox.html">QMessageBox</a> picks a suitable default automatically.</p>
<p>Returns the identity of the standard button that was activated. If escape was pressed, returns <a href="qmessagebox.html#StandardButton-enum">QMessageBox::Cancel</a>.</p>
<p>If <i>parent</i> is 0, the message box becomes an application-global modal dialog box. If <i>parent</i> is a widget, the message box becomes modal relative to <i>parent</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#question">question</a>(), <a href="qmessagebox.html#warning">warning</a>(), and <a href="qmessagebox.html#information">information</a>().</p>
<h3 class="fn"><a name="defaultButton"></a><a href="qpushbutton.html">QPushButton</a> * QMessageBox::defaultButton () const</h3>
<p>Returns the button that should be the message box's <a href="qpushbutton.html#default-prop">default button</a>. Returns 0 if no default button was set.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#setDefaultButton">setDefaultButton</a>(), <a href="qmessagebox.html#addButton">addButton</a>(), and <a href="qpushbutton.html#default-prop">QPushButton::setDefault</a>().</p>
<h3 class="fn"><a name="escapeButton"></a><a href="qabstractbutton.html">QAbstractButton</a> * QMessageBox::escapeButton () const</h3>
<p>Returns the button that is activated when escape is presed. Returns 0 if no escape button was set.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#setEscapeButton">setEscapeButton</a>() and <a href="qmessagebox.html#addButton">addButton</a>().</p>
<h3 class="fn"><a name="information"></a><a href="qmessagebox.html#StandardButton-enum">StandardButton</a> QMessageBox::information ( <a href="qwidget.html">QWidget</a> * <i>parent</i>, const <a href="qstring.html">QString</a> & <i>title</i>, const <a href="qstring.html">QString</a> & <i>text</i>, <a href="qmessagebox.html#StandardButton-enum">StandardButtons</a> <i>buttons</i> = Ok, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>defaultButton</i> = NoButton ) <tt> [static]</tt></h3>
<p>Opens an information message box with the title <i>title</i> and the text <i>text</i>. The standard buttons <i>buttons</i> is added to the message box. <i>defaultButton</i> specifies the button be used as the defaultButton. If the <i>defaultButton</i> is set to <a href="qmessagebox.html#StandardButton-enum">QMessageBox::NoButton</a>, <a href="qmessagebox.html">QMessageBox</a> picks a suitable default automatically.</p>
<p>Returns the identity of the standard button that was activated. If escape was pressed, returns <a href="qmessagebox.html#StandardButton-enum">QMessageBox::Cancel</a>.</p>
<p>If <i>parent</i> is 0, the message box becomes an application-global modal dialog box. If <i>parent</i> is a widget, the message box becomes modal relative to <i>parent</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#question">question</a>(), <a href="qmessagebox.html#warning">warning</a>(), and <a href="qmessagebox.html#critical">critical</a>().</p>
<h3 class="fn"><a name="question"></a><a href="qmessagebox.html#StandardButton-enum">StandardButton</a> QMessageBox::question ( <a href="qwidget.html">QWidget</a> * <i>parent</i>, const <a href="qstring.html">QString</a> & <i>title</i>, const <a href="qstring.html">QString</a> & <i>text</i>, <a href="qmessagebox.html#StandardButton-enum">StandardButtons</a> <i>buttons</i> = Ok, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>defaultButton</i> = NoButton ) <tt> [static]</tt></h3>
<p>Opens a question message box with the title <i>title</i> and the text <i>text</i>. The standard buttons <i>buttons</i> is added to the message box. <i>defaultButton</i> specifies the button be used as the defaultButton. If the <i>defaultButton</i> is set to <a href="qmessagebox.html#StandardButton-enum">QMessageBox::NoButton</a>, <a href="qmessagebox.html">QMessageBox</a> picks a suitable default automatically.</p>
<p>Returns the identity of the standard button that was activated. If escape was pressed, returns <a href="qmessagebox.html#StandardButton-enum">QMessageBox::Cancel</a>.</p>
<p>If <i>parent</i> is 0, the message box becomes an application-global modal dialog box. If <i>parent</i> is a widget, the message box becomes modal relative to <i>parent</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#information">information</a>(), <a href="qmessagebox.html#warning">warning</a>(), and <a href="qmessagebox.html#critical">critical</a>().</p>
<h3 class="fn"><a name="removeButton"></a>void QMessageBox::removeButton ( <a href="qabstractbutton.html">QAbstractButton</a> * <i>button</i> )</h3>
<p>Removes <i>button</i> from the button box without deleting it.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#addButton">addButton</a>() and <a href="qmessagebox.html#standardButtons-prop">setStandardButtons</a>().</p>
<h3 class="fn"><a name="setDefaultButton"></a>void QMessageBox::setDefaultButton ( <a href="qpushbutton.html">QPushButton</a> * <i>button</i> )</h3>
<p>Sets the message box's <a href="qpushbutton.html#default-prop">default button</a> to <i>button</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#defaultButton">defaultButton</a>(), <a href="qmessagebox.html#addButton">addButton</a>(), and <a href="qpushbutton.html#default-prop">QPushButton::setDefault</a>().</p>
<h3 class="fn"><a name="setEscapeButton"></a>void QMessageBox::setEscapeButton ( <a href="qabstractbutton.html">QAbstractButton</a> * <i>button</i> )</h3>
<p>Sets the button that gets activated when the <b>Escape</b> key is pressed to <i>button</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#escapeButton">escapeButton</a>(), <a href="qmessagebox.html#addButton">addButton</a>(), and <a href="qmessagebox.html#clickedButton">clickedButton</a>().</p>
<h3 class="fn"><a name="setWindowModality"></a>void QMessageBox::setWindowModality ( <a href="qt.html#WindowModality-enum">Qt::WindowModality</a> <i>windowModality</i> )</h3>
<p>This function shadows <a href="qwidget.html#windowModality-prop">QWidget::setWindowModality</a>().</p>
<p>Sets the modality of the message box to <i>windowModality</i>.</p>
<p>On Mac OS X, if the modality is set to <a href="qt.html#WindowModality-enum">Qt::WindowModal</a> and the message box has a parent, then the message box will be a <a href="qt.html#WindowType-enum">Qt::Sheet</a>, otherwise the message box will be a standard dialog.</p>
<p>This function was introduced in Qt 4.2.</p>
<h3 class="fn"><a name="setWindowTitle"></a>void QMessageBox::setWindowTitle ( const <a href="qstring.html">QString</a> & <i>title</i> )</h3>
<p>This function shadows <a href="qwidget.html#windowTitle-prop">QWidget::setWindowTitle</a>().</p>
<p>Sets the title of the message box to <i>title</i>. On Mac OS X, the window title is ignored (as required by the Mac OS X Guidelines).</p>
<p>This function was introduced in Qt 4.2.</p>
<h3 class="fn"><a name="standardButton"></a><a href="qmessagebox.html#StandardButton-enum">StandardButton</a> QMessageBox::standardButton ( <a href="qabstractbutton.html">QAbstractButton</a> * <i>button</i> ) const</h3>
<p>Returns the standard button enum value corresponding to the given <i>button</i>, or <a href="qmessagebox.html#StandardButton-enum">NoButton</a> if the given <i>button</i> isn't a standard button.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#button">button</a>() and <a href="qmessagebox.html#standardButtons-prop">standardButtons</a>().</p>
<h3 class="fn"><a name="warning"></a><a href="qmessagebox.html#StandardButton-enum">StandardButton</a> QMessageBox::warning ( <a href="qwidget.html">QWidget</a> * <i>parent</i>, const <a href="qstring.html">QString</a> & <i>title</i>, const <a href="qstring.html">QString</a> & <i>text</i>, <a href="qmessagebox.html#StandardButton-enum">StandardButtons</a> <i>buttons</i> = Ok, <a href="qmessagebox.html#StandardButton-enum">StandardButton</a> <i>defaultButton</i> = NoButton ) <tt> [static]</tt></h3>
<p>Opens a warning message box with the title <i>title</i> and the text <i>text</i>. The standard buttons <i>buttons</i> is added to the message box. <i>defaultButton</i> specifies the button be used as the defaultButton. If the <i>defaultButton</i> is set to <a href="qmessagebox.html#StandardButton-enum">QMessageBox::NoButton</a>, <a href="qmessagebox.html">QMessageBox</a> picks a suitable default automatically.</p>
<p>Returns the identity of the standard button that was activated. If escape was pressed, returns <a href="qmessagebox.html#StandardButton-enum">QMessageBox::Cancel</a>.</p>
<p>If <i>parent</i> is 0, the message box becomes an application-global modal dialog box. If <i>parent</i> is a widget, the message box becomes modal relative to <i>parent</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p>See also <a href="qmessagebox.html#question">question</a>(), <a href="qmessagebox.html#information">information</a>(), and <a href="qmessagebox.html#critical">critical</a>().</p>
<hr />
<h2>Macro Documentation</h2>
<h3 class="fn"><a name="QT_REQUIRE_VERSION"></a>QT_REQUIRE_VERSION ( int <i>argc</i>, char ** <i>argv</i>, const char * <i>version</i> )</h3>
<p>This macro can be used to ensure that the application is run against a recent enough version of Qt. This is especially useful if your application depends on a specific bug fix introduced in a bug-fix release (e.g., 4.0.2).</p>
<p>The <i>argc</i> and <i>argv</i> parameters are the <tt>main()</tt> function's <tt>argc</tt> and <tt>argv</tt> parameters. The <i>version</i> parameter is a string literal that specifies which version of Qt the application requires (e.g., "4.0.2").</p>
<p>Example:</p>
<pre> #include <QApplication>
#include <QMessageBox>
int main(int argc, char *argv[])
{
QT_REQUIRE_VERSION(argc, argv, "4.0.2")
QApplication app(argc, argv);
...
return app.exec();
}</pre>
<hr />
<h2>Member Function Documentation</h2>
<h3 class="fn"><a name="QMessageBox-4"></a>QMessageBox::QMessageBox ( const <a href="qstring.html">QString</a> & <i>title</i>, const <a href="qstring.html">QString</a> & <i>text</i>, <a href="qmessagebox.html#Icon-enum">Icon</a> <i>icon</i>, int <i>button0</i>, int <i>button1</i>, int <i>button2</i>, <a href="qwidget.html">QWidget</a> * <i>parent</i>, const char * <i>name</i>, bool <i>modal</i>, <a href="qt.html#WindowType-enum">Qt::WindowFlags</a> <i>f</i> = Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint )</h3>
<p>Constructs a message box with the given <i>parent</i>, <i>name</i>, and window flags, <i>f</i>. The window title is specified by <i>title</i>, and the message box displays message text and an icon specified by <i>text</i> and <i>icon</i>.</p>
<p>The buttons that the user can access to respond to the message are defined by <i>button0</i>, <i>button1</i>, and <i>button2</i>.</p>
<h3 class="fn"><a name="QMessageBox-5"></a>QMessageBox::QMessageBox ( <a href="qwidget.html">QWidget</a> * <i>parent</i>, const char * <i>name</i> )</h3>
<p>Constructs a message box with the given <i>parent</i> and <i>name</i>.</p>
<h3 class="fn"><a name="message"></a>int QMessageBox::message ( const <a href="qstring.html">QString</a> & <i>title</i>, const <a href="qstring.html">QString</a> & <i>text</i>, const <a href="qstring.html">QString</a> & <i>buttonText</i> = QString(), <a href="qwidget.html">QWidget</a> * <i>parent</i> = 0, const char * <i>name</i> = 0 ) <tt> [static]</tt></h3>
<p>Opens a modal message box with the given <i>title</i> and showing the given <i>text</i>. The message box has a single button which has the given <i>buttonText</i> (or tr("OK")). The message box is centred over its <i>parent</i> and is called <i>name</i>.</p>
<p>Use <a href="qmessagebox.html#information">information</a>(), <a href="qmessagebox.html#warning">warning</a>(), <a href="qmessagebox.html#question">question</a>(), or <a href="qmessagebox.html#critical">critical</a>() instead.</p>
<p>For example, if you have code like</p>
<pre><font color="#404040"> QMessageBox::message(tr("My App"), tr("All occurrences replaced."),
tr("Close"), this);</font></pre>
<p>you can rewrite it as</p>
<pre> QMessageBox::information(this, tr("My App"),
tr("All occurrences replaced."),
QMessageBox::Close);</pre>
<h3 class="fn"><a name="query"></a>bool QMessageBox::query ( const <a href="qstring.html">QString</a> & <i>caption</i>, const <a href="qstring.html">QString</a> & <i>text</i>, const <a href="qstring.html">QString</a> & <i>yesButtonText</i> = QString(), const <a href="qstring.html">QString</a> & <i>noButtonText</i> = QString(), <a href="qwidget.html">QWidget</a> * <i>parent</i> = 0, const char * <i>name</i> = 0 ) <tt> [static]</tt></h3>
<p>Queries the user using a modal message box with up to two buttons. The message box has the given <i>caption</i> (although some window managers don't show it), and shows the given <i>text</i>. The left button has the <i>yesButtonText</i> (or tr("OK")), and the right button has the <i>noButtonText</i> (or isn't shown). The message box is centred over its <i>parent</i> and is called <i>name</i>.</p>
<p>Use <a href="qmessagebox.html#information">information</a>(), <a href="qmessagebox.html#question">question</a>(), <a href="qmessagebox.html#warning">warning</a>(), or <a href="qmessagebox.html#critical">critical</a>() instead.</p>
<h3 class="fn"><a name="standardIcon"></a><a href="qpixmap.html">QPixmap</a> QMessageBox::standardIcon ( <a href="qmessagebox.html#Icon-enum">Icon</a> <i>icon</i>, <a href="qt-qt3.html#GUIStyle-enum">Qt::GUIStyle</a> <i>style</i> ) <tt> [static]</tt></h3>
<p>Returns the pixmap used for a standard icon. This allows the pixmaps to be used in more complex message boxes. <i>icon</i> specifies the required icon, e.g. <a href="qmessagebox.html#Icon-enum">QMessageBox::Information</a>, <a href="qmessagebox.html#Icon-enum">QMessageBox::Warning</a> or <a href="qmessagebox.html#Icon-enum">QMessageBox::Critical</a>.</p>
<p><i>style</i> is unused.</p>
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