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<td >Qt 5.9</td><td ><a href="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-module.html">C++ Classes</a></td><td >QMdiArea</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#public-types">Public Types</a></li>
<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#reimplemented-public-functions">Reimplemented Public Functions</a></li>
<li class="level1"><a href="#public-slots">Public Slots</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#reimplemented-protected-functions">Reimplemented Protected Functions</a></li>
<li class="level1"><a href="#protected-slots">Protected Slots</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QMdiArea Class</h1>
<!-- $$$QMdiArea-brief -->
<p>The <a href="qmdiarea.html">QMdiArea</a> widget provides an area in which MDI windows are displayed. <a href="#details">More...</a></p>
<!-- @@@QMdiArea -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QMdiArea&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += widgets</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  Qt 4.3</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="qabstractscrollarea.html">QAbstractScrollArea</a></td></tr></table></div><ul>
<li><a href="qmdiarea-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="public-types"></a>
<h2 id="public-types">Public Types</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#AreaOption-enum">AreaOption</a></b> { DontMaximizeSubWindowOnActivation }</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> flags </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#AreaOption-enum">AreaOptions</a></b></td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#ViewMode-enum">ViewMode</a></b> { SubWindowView, TabbedView }</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#WindowOrder-enum">WindowOrder</a></b> { CreationOrder, StackingOrder, ActivationHistoryOrder }</td></tr>
</table></div>
<a name="properties"></a>
<h2 id="properties">Properties</h2>
<div class="table"><table class="propsummary">
<tr><td class="topAlign"><ul>
<li class="fn"><b><a href="qmdiarea.html#activationOrder-prop">activationOrder</a></b> : WindowOrder</li>
<li class="fn"><b><a href="qmdiarea.html#background-prop">background</a></b> : QBrush</li>
<li class="fn"><b><a href="qmdiarea.html#documentMode-prop">documentMode</a></b> : bool</li>
<li class="fn"><b><a href="qmdiarea.html#tabPosition-prop">tabPosition</a></b> : QTabWidget::TabPosition</li>
</ul></td><td class="topAlign"><ul>
<li class="fn"><b><a href="qmdiarea.html#tabShape-prop">tabShape</a></b> : QTabWidget::TabShape</li>
<li class="fn"><b><a href="qmdiarea.html#tabsClosable-prop">tabsClosable</a></b> : bool</li>
<li class="fn"><b><a href="qmdiarea.html#tabsMovable-prop">tabsMovable</a></b> : bool</li>
<li class="fn"><b><a href="qmdiarea.html#viewMode-prop">viewMode</a></b> : ViewMode</li>
</ul>
</td></tr>
</table></div>
<ul>
<li class="fn">3 properties inherited from <a href="qabstractscrollarea.html#properties">QAbstractScrollArea</a></li>
<li class="fn">6 properties inherited from <a href="qframe.html#properties">QFrame</a></li>
<li class="fn">59 properties inherited from <a href="qwidget.html#properties">QWidget</a></li>
<li class="fn">1 property inherited from <a href="../qtcore/qobject.html#properties">QObject</a></li>
</ul>
<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#QMdiArea">QMdiArea</a></b>(QWidget *<i>parent</i> = Q_NULLPTR)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#dtor.QMdiArea">~QMdiArea</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> WindowOrder </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#activationOrder-prop">activationOrder</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QMdiSubWindow *</td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#activeSubWindow">activeSubWindow</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QMdiSubWindow *</td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#addSubWindow">addSubWindow</a></b>(QWidget *<i>widget</i>, Qt::WindowFlags <i>windowFlags</i> = Qt::WindowFlags())</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QBrush </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#background-prop">background</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QMdiSubWindow *</td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#currentSubWindow">currentSubWindow</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#documentMode-prop">documentMode</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#removeSubWindow">removeSubWindow</a></b>(QWidget *<i>widget</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#activationOrder-prop">setActivationOrder</a></b>(WindowOrder <i>order</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#background-prop">setBackground</a></b>(const QBrush &amp;<i>background</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#documentMode-prop">setDocumentMode</a></b>(bool <i>enabled</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#setOption">setOption</a></b>(AreaOption <i>option</i>, bool <i>on</i> = true)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#tabPosition-prop">setTabPosition</a></b>(QTabWidget::TabPosition <i>position</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#tabShape-prop">setTabShape</a></b>(QTabWidget::TabShape <i>shape</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#tabsClosable-prop">setTabsClosable</a></b>(bool <i>closable</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#tabsMovable-prop">setTabsMovable</a></b>(bool <i>movable</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#viewMode-prop">setViewMode</a></b>(ViewMode <i>mode</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QList&lt;QMdiSubWindow *&gt; </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#subWindowList">subWindowList</a></b>(WindowOrder <i>order</i> = CreationOrder) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QTabWidget::TabPosition </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#tabPosition-prop">tabPosition</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QTabWidget::TabShape </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#tabShape-prop">tabShape</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#tabsClosable-prop">tabsClosable</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#tabsMovable-prop">tabsMovable</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#testOption">testOption</a></b>(AreaOption <i>option</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> ViewMode </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#viewMode-prop">viewMode</a></b>() const</td></tr>
</table></div>
<a name="reimplemented-public-functions"></a>
<h2 id="reimplemented-public-functions">Reimplemented Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual QSize </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#minimumSizeHint">minimumSizeHint</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QSize </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#sizeHint">sizeHint</a></b>() const</td></tr>
</table></div>
<ul>
<li class="fn">20 public functions inherited from <a href="qabstractscrollarea.html#public-functions">QAbstractScrollArea</a></li>
<li class="fn">14 public functions inherited from <a href="qframe.html#public-functions">QFrame</a></li>
<li class="fn">214 public functions inherited from <a href="qwidget.html#public-functions">QWidget</a></li>
<li class="fn">32 public functions inherited from <a href="../qtcore/qobject.html#public-functions">QObject</a></li>
<li class="fn">14 public functions inherited from <a href="../qtgui/qpaintdevice.html#public-functions">QPaintDevice</a></li>
</ul>
<a name="public-slots"></a>
<h2 id="public-slots">Public Slots</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#activateNextSubWindow">activateNextSubWindow</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#activatePreviousSubWindow">activatePreviousSubWindow</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#cascadeSubWindows">cascadeSubWindows</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#closeActiveSubWindow">closeActiveSubWindow</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#closeAllSubWindows">closeAllSubWindows</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#setActiveSubWindow">setActiveSubWindow</a></b>(QMdiSubWindow *<i>window</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#tileSubWindows">tileSubWindows</a></b>()</td></tr>
</table></div>
<ul>
<li class="fn">19 public slots inherited from <a href="qwidget.html#public-slots">QWidget</a></li>
<li class="fn">1 public slot inherited from <a href="../qtcore/qobject.html#public-slots">QObject</a></li>
</ul>
<a name="signals"></a>
<h2 id="signals">Signals</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#subWindowActivated">subWindowActivated</a></b>(QMdiSubWindow *<i>window</i>)</td></tr>
</table></div>
<ul>
<li class="fn">3 signals inherited from <a href="qwidget.html#signals">QWidget</a></li>
<li class="fn">2 signals inherited from <a href="../qtcore/qobject.html#signals">QObject</a></li>
</ul>
<a name="reimplemented-protected-functions"></a>
<h2 id="reimplemented-protected-functions">Reimplemented Protected Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#childEvent">childEvent</a></b>(QChildEvent *<i>childEvent</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#event">event</a></b>(QEvent *<i>event</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#eventFilter">eventFilter</a></b>(QObject *<i>object</i>, QEvent *<i>event</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#paintEvent">paintEvent</a></b>(QPaintEvent *<i>paintEvent</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#resizeEvent">resizeEvent</a></b>(QResizeEvent *<i>resizeEvent</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#scrollContentsBy">scrollContentsBy</a></b>(int <i>dx</i>, int <i>dy</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#showEvent">showEvent</a></b>(QShowEvent *<i>showEvent</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#timerEvent">timerEvent</a></b>(QTimerEvent *<i>timerEvent</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#viewportEvent">viewportEvent</a></b>(QEvent *<i>event</i>)</td></tr>
</table></div>
<ul>
<li class="fn">20 protected functions inherited from <a href="qabstractscrollarea.html#protected-functions">QAbstractScrollArea</a></li>
<li class="fn">4 protected functions inherited from <a href="qframe.html#protected-functions">QFrame</a></li>
<li class="fn">35 protected functions inherited from <a href="qwidget.html#protected-functions">QWidget</a></li>
<li class="fn">9 protected functions inherited from <a href="../qtcore/qobject.html#protected-functions">QObject</a></li>
<li class="fn">1 protected function inherited from <a href="../qtgui/qpaintdevice.html#protected-functions">QPaintDevice</a></li>
</ul>
<a name="protected-slots"></a>
<h2 id="protected-slots">Protected Slots</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmdiarea.html#setupViewport">setupViewport</a></b>(QWidget *<i>viewport</i>)</td></tr>
</table></div>
<ul>
<li class="fn">1 protected slot inherited from <a href="qwidget.html#protected-slots">QWidget</a></li>
</ul>
<h3>Additional Inherited Members</h3>
<ul>
<li class="fn">1 public variable inherited from <a href="../qtcore/qobject.html#public-variables">QObject</a></li>
<li class="fn">5 static public members inherited from <a href="qwidget.html#static-public-members">QWidget</a></li>
<li class="fn">10 static public members inherited from <a href="../qtcore/qobject.html#static-public-members">QObject</a></li>
<li class="fn">20 protected functions inherited from <a href="qabstractscrollarea.html#protected-functions">QAbstractScrollArea</a></li>
<li class="fn">4 protected functions inherited from <a href="qframe.html#protected-functions">QFrame</a></li>
<li class="fn">35 protected functions inherited from <a href="qwidget.html#protected-functions">QWidget</a></li>
<li class="fn">9 protected functions inherited from <a href="../qtcore/qobject.html#protected-functions">QObject</a></li>
<li class="fn">1 protected function inherited from <a href="../qtgui/qpaintdevice.html#protected-functions">QPaintDevice</a></li>
<li class="fn">2 protected variables inherited from <a href="../qtcore/qobject.html#protected-variables">QObject</a></li>
<li class="fn">1 protected type inherited from <a href="../qtgui/qpaintdevice.html#protected-variables">QPaintDevice</a></li>
</ul>
<a name="details"></a>
<!-- $$$QMdiArea-description -->
<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qmdiarea.html">QMdiArea</a> widget provides an area in which MDI windows are displayed.</p>
<p><a href="qmdiarea.html">QMdiArea</a> functions, essentially, like a window manager for MDI windows. For instance, it draws the windows it manages on itself and arranges them in a cascading or tile pattern. <a href="qmdiarea.html">QMdiArea</a> is commonly used as the center widget in a <a href="qmainwindow.html">QMainWindow</a> to create MDI applications, but can also be placed in any layout. The following code adds an area to a main window:</p>
<pre class="cpp">

      <span class="type"><a href="qmainwindow.html">QMainWindow</a></span> <span class="operator">*</span>mainWindow <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmainwindow.html">QMainWindow</a></span>;
      mainWindow<span class="operator">-</span><span class="operator">&gt;</span>setCentralWidget(mdiArea);

</pre>
<p>Unlike the window managers for top-level windows, all window flags (<a href="../qtcore/qt.html#WindowType-enum">Qt::WindowFlags</a>) are supported by <a href="qmdiarea.html">QMdiArea</a> as long as the flags are supported by the current widget style. If a specific flag is not supported by the style (e.g&#x2e;, the <a href="../qtcore/qt.html#WindowType-enum">WindowShadeButtonHint</a>), you can still shade the window with showShaded().</p>
<p>Subwindows in <a href="qmdiarea.html">QMdiArea</a> are instances of <a href="qmdisubwindow.html">QMdiSubWindow</a>. They are added to an MDI area with <a href="qmdiarea.html#addSubWindow">addSubWindow</a>(). It is common to pass a <a href="qwidget.html">QWidget</a>, which is set as the internal widget, to this function, but it is also possible to pass a <a href="qmdisubwindow.html">QMdiSubWindow</a> directly.The class inherits <a href="qwidget.html">QWidget</a>, and you can use the same API as with a normal top-level window when programming. <a href="qmdisubwindow.html">QMdiSubWindow</a> also has behavior that is specific to MDI windows. See the <a href="qmdisubwindow.html">QMdiSubWindow</a> class description for more details.</p>
<p>A subwindow becomes active when it gets the keyboard focus, or when <a href="qwidget.html#setFocus-1">setFocus</a>() is called. The user activates a window by moving focus in the usual ways. The MDI area emits the <a href="qmdiarea.html#subWindowActivated">subWindowActivated</a>() signal when the active window changes, and the <a href="qmdiarea.html#activeSubWindow">activeSubWindow</a>() function returns the active subwindow.</p>
<p>The convenience function <a href="qmdiarea.html#subWindowList">subWindowList</a>() returns a list of all subwindows. This information could be used in a popup menu containing a list of windows, for example.</p>
<p>The subwindows are sorted by the current <a href="qmdiarea.html#WindowOrder-enum">WindowOrder</a>. This is used for the <a href="qmdiarea.html#subWindowList">subWindowList</a>() and for <a href="qmdiarea.html#activateNextSubWindow">activateNextSubWindow</a>() and <a href="qmdiarea.html#activatePreviousSubWindow">activatePreviousSubWindow</a>(). Also, it is used when cascading or tiling the windows with <a href="qmdiarea.html#cascadeSubWindows">cascadeSubWindows</a>() and <a href="qmdiarea.html#tileSubWindows">tileSubWindows</a>().</p>
<p><a href="qmdiarea.html">QMdiArea</a> provides two built-in layout strategies for subwindows: <a href="qmdiarea.html#cascadeSubWindows">cascadeSubWindows</a>() and <a href="qmdiarea.html#tileSubWindows">tileSubWindows</a>(). Both are slots and are easily connected to menu entries.</p>
<div class="table"><table class="generic">
 <tr valign="top" class="odd"><td ><img src="images/mdi-cascade.png" alt="" /></td><td ><img src="images/mdi-tile.png" alt="" /></td></tr>
</table></div>
<p><b>Note: </b>The default scroll bar property for <a href="qmdiarea.html">QMdiArea</a> is <a href="../qtcore/qt.html#ScrollBarPolicy-enum">Qt::ScrollBarAlwaysOff</a>.</p></div>
<p><b>See also </b><a href="qmdisubwindow.html">QMdiSubWindow</a>.</p>
<!-- @@@QMdiArea -->
<div class="types">
<h2>Member Type Documentation</h2>
<!-- $$$AreaOption$$$DontMaximizeSubWindowOnActivation -->
<h3 class="flags" id="AreaOption-enum"><a name="AreaOption-enum"></a>enum QMdiArea::<span class="name">AreaOption</span><br/>flags QMdiArea::<span class="name">AreaOptions</span></h3>
<p>This enum describes options that customize the behavior of the <a href="qmdiarea.html">QMdiArea</a>.</p>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>QMdiArea::DontMaximizeSubWindowOnActivation</code></td><td class="topAlign tblval"><code>0x1</code></td><td class="topAlign">When the active subwindow is maximized, the default behavior is to maximize the next subwindow that is activated. Set this option if you do not want this behavior.</td></tr>
</table></div>
<p>The AreaOptions type is a typedef for <a href="../qtcore/qflags.html">QFlags</a>&lt;AreaOption&gt;. It stores an OR combination of AreaOption values.</p>
<!-- @@@AreaOption -->
<!-- $$$ViewMode$$$SubWindowView$$$TabbedView -->
<h3 class="fn" id="ViewMode-enum"><a name="ViewMode-enum"></a>enum QMdiArea::<span class="name">ViewMode</span></h3>
<p>This enum describes the view mode of the area; i.e&#x2e; how sub-windows will be displayed.</p>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>QMdiArea::SubWindowView</code></td><td class="topAlign tblval"><code>0</code></td><td class="topAlign">Display sub-windows with window frames (default).</td></tr>
<tr><td class="topAlign"><code>QMdiArea::TabbedView</code></td><td class="topAlign tblval"><code>1</code></td><td class="topAlign">Display sub-windows with tabs in a tab bar.</td></tr>
</table></div>
<p>This enum was introduced or modified in  Qt 4.4.</p>
<p><b>See also </b><a href="qmdiarea.html#viewMode-prop">setViewMode</a>().</p>
<!-- @@@ViewMode -->
<!-- $$$WindowOrder$$$CreationOrder$$$StackingOrder$$$ActivationHistoryOrder -->
<h3 class="fn" id="WindowOrder-enum"><a name="WindowOrder-enum"></a>enum QMdiArea::<span class="name">WindowOrder</span></h3>
<p>Specifies the criteria to use for ordering the list of child windows returned by <a href="qmdiarea.html#subWindowList">subWindowList</a>(). The functions <a href="qmdiarea.html#cascadeSubWindows">cascadeSubWindows</a>() and <a href="qmdiarea.html#tileSubWindows">tileSubWindows</a>() follow this order when arranging the windows.</p>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>QMdiArea::CreationOrder</code></td><td class="topAlign tblval"><code>0</code></td><td class="topAlign">The windows are returned in the order of their creation.</td></tr>
<tr><td class="topAlign"><code>QMdiArea::StackingOrder</code></td><td class="topAlign tblval"><code>1</code></td><td class="topAlign">The windows are returned in the order in which they are stacked, with the top-most window being last in the list.</td></tr>
<tr><td class="topAlign"><code>QMdiArea::ActivationHistoryOrder</code></td><td class="topAlign tblval"><code>2</code></td><td class="topAlign">The windows are returned in the order in which they were activated.</td></tr>
</table></div>
<p><b>See also </b><a href="qmdiarea.html#subWindowList">subWindowList</a>().</p>
<!-- @@@WindowOrder -->
</div>
<div class="prop">
<h2>Property Documentation</h2>
<!-- $$$activationOrder-prop$$$activationOrder$$$setActivationOrderWindowOrder -->
<h3 class="fn" id="activationOrder-prop"><a name="activationOrder-prop"></a><span class="name">activationOrder</span> : <span class="type"><a href="qmdiarea.html#WindowOrder-enum">WindowOrder</a></span></h3>
<p>This property holds the ordering criteria for subwindow lists</p>
<p>This property specifies the ordering criteria for the list of subwindows returned by <a href="qmdiarea.html#subWindowList">subWindowList</a>(). By default, it is the window creation order.</p>
<p>This property was introduced in  Qt 4.4.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> WindowOrder </td><td class="memItemRight bottomAlign"><span class="name"><b>activationOrder</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setActivationOrder</b></span>(WindowOrder <i>order</i>)</td></tr>
</table></div>
<p><b>See also </b><a href="qmdiarea.html#subWindowList">subWindowList</a>().</p>
<!-- @@@activationOrder -->
<!-- $$$background-prop$$$background$$$setBackgroundconstQBrush& -->
<h3 class="fn" id="background-prop"><a name="background-prop"></a><span class="name">background</span> : <span class="type"><a href="../qtgui/qbrush.html">QBrush</a></span></h3>
<p>This property holds the background brush for the workspace</p>
<p>This property sets the background brush for the workspace area itself. By default, it is a gray color, but can be any brush (e.g&#x2e;, colors, gradients or pixmaps).</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QBrush </td><td class="memItemRight bottomAlign"><span class="name"><b>background</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setBackground</b></span>(const QBrush &amp;<i>background</i>)</td></tr>
</table></div>
<!-- @@@background -->
<!-- $$$documentMode-prop$$$documentMode$$$setDocumentModebool -->
<h3 class="fn" id="documentMode-prop"><a name="documentMode-prop"></a><span class="name">documentMode</span> : <span class="type">bool</span></h3>
<p>This property holds whether the tab bar is set to document mode in tabbed view mode.</p>
<p>Document mode is disabled by default.</p>
<p>This property was introduced in  Qt 4.5.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> bool </td><td class="memItemRight bottomAlign"><span class="name"><b>documentMode</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setDocumentMode</b></span>(bool <i>enabled</i>)</td></tr>
</table></div>
<p><b>See also </b><a href="qtabbar.html#documentMode-prop">QTabBar::documentMode</a> and <a href="qmdiarea.html#viewMode-prop">setViewMode</a>().</p>
<!-- @@@documentMode -->
<!-- $$$tabPosition-prop$$$tabPosition$$$setTabPositionQTabWidget::TabPosition -->
<h3 class="fn" id="tabPosition-prop"><a name="tabPosition-prop"></a><span class="name">tabPosition</span> : <span class="type"><a href="qtabwidget.html#TabPosition-enum">QTabWidget::TabPosition</a></span></h3>
<p>This property holds the position of the tabs in tabbed view mode.</p>
<p>Possible values for this property are described by the <a href="qtabwidget.html#TabPosition-enum">QTabWidget::TabPosition</a> enum.</p>
<p>This property was introduced in  Qt 4.4.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QTabWidget::TabPosition </td><td class="memItemRight bottomAlign"><span class="name"><b>tabPosition</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setTabPosition</b></span>(QTabWidget::TabPosition <i>position</i>)</td></tr>
</table></div>
<p><b>See also </b><a href="qtabwidget.html#TabPosition-enum">QTabWidget::TabPosition</a> and <a href="qmdiarea.html#viewMode-prop">setViewMode</a>().</p>
<!-- @@@tabPosition -->
<!-- $$$tabShape-prop$$$tabShape$$$setTabShapeQTabWidget::TabShape -->
<h3 class="fn" id="tabShape-prop"><a name="tabShape-prop"></a><span class="name">tabShape</span> : <span class="type"><a href="qtabwidget.html#TabShape-enum">QTabWidget::TabShape</a></span></h3>
<p>This property holds the shape of the tabs in tabbed view mode.</p>
<p>Possible values for this property are <a href="qtabwidget.html#TabShape-enum">QTabWidget::Rounded</a> (default) or <a href="qtabwidget.html#TabShape-enum">QTabWidget::Triangular</a>.</p>
<p>This property was introduced in  Qt 4.4.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QTabWidget::TabShape </td><td class="memItemRight bottomAlign"><span class="name"><b>tabShape</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setTabShape</b></span>(QTabWidget::TabShape <i>shape</i>)</td></tr>
</table></div>
<p><b>See also </b><a href="qtabwidget.html#TabShape-enum">QTabWidget::TabShape</a> and <a href="qmdiarea.html#viewMode-prop">setViewMode</a>().</p>
<!-- @@@tabShape -->
<!-- $$$tabsClosable-prop$$$tabsClosable$$$setTabsClosablebool -->
<h3 class="fn" id="tabsClosable-prop"><a name="tabsClosable-prop"></a><span class="name">tabsClosable</span> : <span class="type">bool</span></h3>
<p>This property holds whether the tab bar should place close buttons on each tab in tabbed view mode.</p>
<p>Tabs are not closable by default.</p>
<p>This property was introduced in  Qt 4.8.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> bool </td><td class="memItemRight bottomAlign"><span class="name"><b>tabsClosable</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setTabsClosable</b></span>(bool <i>closable</i>)</td></tr>
</table></div>
<p><b>See also </b><a href="qtabbar.html#tabsClosable-prop">QTabBar::tabsClosable</a> and <a href="qmdiarea.html#viewMode-prop">setViewMode</a>().</p>
<!-- @@@tabsClosable -->
<!-- $$$tabsMovable-prop$$$tabsMovable$$$setTabsMovablebool -->
<h3 class="fn" id="tabsMovable-prop"><a name="tabsMovable-prop"></a><span class="name">tabsMovable</span> : <span class="type">bool</span></h3>
<p>This property holds whether the user can move the tabs within the tabbar area in tabbed view mode.</p>
<p>Tabs are not movable by default.</p>
<p>This property was introduced in  Qt 4.8.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> bool </td><td class="memItemRight bottomAlign"><span class="name"><b>tabsMovable</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setTabsMovable</b></span>(bool <i>movable</i>)</td></tr>
</table></div>
<p><b>See also </b><a href="qtabbar.html#movable-prop">QTabBar::movable</a> and <a href="qmdiarea.html#viewMode-prop">setViewMode</a>().</p>
<!-- @@@tabsMovable -->
<!-- $$$viewMode-prop$$$viewMode$$$setViewModeViewMode -->
<h3 class="fn" id="viewMode-prop"><a name="viewMode-prop"></a><span class="name">viewMode</span> : <span class="type"><a href="qmdiarea.html#ViewMode-enum">ViewMode</a></span></h3>
<p>This property holds the way sub-windows are displayed in the <a href="qmdiarea.html">QMdiArea</a>.</p>
<p>By default, the <a href="qmdiarea.html#ViewMode-enum">SubWindowView</a> is used to display sub-windows.</p>
<p>This property was introduced in  Qt 4.4.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> ViewMode </td><td class="memItemRight bottomAlign"><span class="name"><b>viewMode</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setViewMode</b></span>(ViewMode <i>mode</i>)</td></tr>
</table></div>
<p><b>See also </b><a href="qmdiarea.html#ViewMode-enum">ViewMode</a>, <a href="qmdiarea.html#tabShape-prop">setTabShape</a>(), and <a href="qmdiarea.html#tabPosition-prop">setTabPosition</a>().</p>
<!-- @@@viewMode -->
</div>
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QMdiArea[overload1]$$$QMdiAreaQWidget* -->
<h3 class="fn" id="QMdiArea"><a name="QMdiArea"></a>QMdiArea::<span class="name">QMdiArea</span>(<span class="type"><a href="qwidget.html#QWidget">QWidget</a></span> *<i>parent</i> = Q_NULLPTR)</h3>
<p>Constructs an empty mdi area. <i>parent</i> is passed to <a href="qwidget.html">QWidget</a>'s constructor.</p>
<!-- @@@QMdiArea -->
<!-- $$$~QMdiArea[overload1]$$$~QMdiArea -->
<h3 class="fn" id="dtor.QMdiArea"><a name="dtor.QMdiArea"></a>QMdiArea::<span class="name">~QMdiArea</span>()</h3>
<p>Destroys the MDI area.</p>
<!-- @@@~QMdiArea -->
<!-- $$$activateNextSubWindow[overload1]$$$activateNextSubWindow -->
<h3 class="fn" id="activateNextSubWindow"><a name="activateNextSubWindow"></a><code>[slot] </code><span class="type">void</span> QMdiArea::<span class="name">activateNextSubWindow</span>()</h3>
<p>Gives the keyboard focus to another window in the list of child windows. The window activated will be the next one determined by the current <a href="qmdiarea.html#WindowOrder-enum">activation order</a>.</p>
<p><b>See also </b><a href="qmdiarea.html#activatePreviousSubWindow">activatePreviousSubWindow</a>() and <a href="qmdiarea.html#WindowOrder-enum">QMdiArea::WindowOrder</a>.</p>
<!-- @@@activateNextSubWindow -->
<!-- $$$activatePreviousSubWindow[overload1]$$$activatePreviousSubWindow -->
<h3 class="fn" id="activatePreviousSubWindow"><a name="activatePreviousSubWindow"></a><code>[slot] </code><span class="type">void</span> QMdiArea::<span class="name">activatePreviousSubWindow</span>()</h3>
<p>Gives the keyboard focus to another window in the list of child windows. The window activated will be the previous one determined by the current <a href="qmdiarea.html#WindowOrder-enum">activation order</a>.</p>
<p><b>See also </b><a href="qmdiarea.html#activateNextSubWindow">activateNextSubWindow</a>() and <a href="qmdiarea.html#WindowOrder-enum">QMdiArea::WindowOrder</a>.</p>
<!-- @@@activatePreviousSubWindow -->
<!-- $$$activeSubWindow[overload1]$$$activeSubWindow -->
<h3 class="fn" id="activeSubWindow"><a name="activeSubWindow"></a><span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> *QMdiArea::<span class="name">activeSubWindow</span>() const</h3>
<p>Returns a pointer to the current active subwindow. If no window is currently active, 0 is returned.</p>
<p>Subwindows are treated as top-level windows with respect to window state, i.e&#x2e;, if a widget outside the MDI area is the active window, no subwindow will be active. Note that if a widget in the window in which the MDI area lives gains focus, the window will be activated.</p>
<p><b>See also </b><a href="qmdiarea.html#setActiveSubWindow">setActiveSubWindow</a>() and <a href="../qtcore/qt.html#WindowState-enum">Qt::WindowState</a>.</p>
<!-- @@@activeSubWindow -->
<!-- $$$addSubWindow[overload1]$$$addSubWindowQWidget*Qt::WindowFlags -->
<h3 class="fn" id="addSubWindow"><a name="addSubWindow"></a><span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> *QMdiArea::<span class="name">addSubWindow</span>(<span class="type"><a href="qwidget.html#QWidget">QWidget</a></span> *<i>widget</i>, <span class="type"><a href="../qtcore/qt.html#WindowType-enum">Qt::WindowFlags</a></span> <i>windowFlags</i> = Qt::WindowFlags())</h3>
<p>Adds <i>widget</i> as a new subwindow to the MDI area. If <i>windowFlags</i> are non-zero, they will override the flags set on the widget.</p>
<p>The <i>widget</i> can be either a <a href="qmdisubwindow.html">QMdiSubWindow</a> or another <a href="qwidget.html">QWidget</a> (in which case the MDI area will create a subwindow and set the <i>widget</i> as the internal widget).</p>
<p><b>Note: </b>Once the subwindow has been added, its parent will be the <i>viewport widget</i> of the <a href="qmdiarea.html">QMdiArea</a>.</p><pre class="cpp">

      <span class="type"><a href="qmdiarea.html#QMdiArea">QMdiArea</a></span> mdiArea;
      <span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> <span class="operator">*</span>subWindow1 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span>;
      subWindow1<span class="operator">-</span><span class="operator">&gt;</span>setWidget(internalWidget1);
      subWindow1<span class="operator">-</span><span class="operator">&gt;</span>setAttribute(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>WA_DeleteOnClose);
      mdiArea<span class="operator">.</span>addSubWindow(subWindow1);

      <span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> <span class="operator">*</span>subWindow2 <span class="operator">=</span>
          mdiArea<span class="operator">.</span>addSubWindow(internalWidget2);

</pre>
<p>When you create your own subwindow, you must set the <a href="../qtcore/qt.html#WidgetAttribute-enum">Qt::WA_DeleteOnClose</a> widget attribute if you want the window to be deleted when closed in the MDI area. If not, the window will be hidden and the MDI area will not activate the next subwindow.</p>
<p>Returns the <a href="qmdisubwindow.html">QMdiSubWindow</a> that is added to the MDI area.</p>
<p><b>See also </b><a href="qmdiarea.html#removeSubWindow">removeSubWindow</a>().</p>
<!-- @@@addSubWindow -->
<!-- $$$cascadeSubWindows[overload1]$$$cascadeSubWindows -->
<h3 class="fn" id="cascadeSubWindows"><a name="cascadeSubWindows"></a><code>[slot] </code><span class="type">void</span> QMdiArea::<span class="name">cascadeSubWindows</span>()</h3>
<p>Arranges all the child windows in a cascade pattern.</p>
<p><b>See also </b><a href="qmdiarea.html#tileSubWindows">tileSubWindows</a>().</p>
<!-- @@@cascadeSubWindows -->
<!-- $$$childEvent[overload1]$$$childEventQChildEvent* -->
<h3 class="fn" id="childEvent"><a name="childEvent"></a><code>[virtual protected] </code><span class="type">void</span> QMdiArea::<span class="name">childEvent</span>(<span class="type"><a href="../qtcore/qchildevent.html">QChildEvent</a></span> *<i>childEvent</i>)</h3>
<p>Reimplemented from <a href="../qtcore/qobject.html#childEvent">QObject::childEvent</a>().</p>
<!-- @@@childEvent -->
<!-- $$$closeActiveSubWindow[overload1]$$$closeActiveSubWindow -->
<h3 class="fn" id="closeActiveSubWindow"><a name="closeActiveSubWindow"></a><code>[slot] </code><span class="type">void</span> QMdiArea::<span class="name">closeActiveSubWindow</span>()</h3>
<p>Closes the active subwindow.</p>
<p><b>See also </b><a href="qmdiarea.html#closeAllSubWindows">closeAllSubWindows</a>().</p>
<!-- @@@closeActiveSubWindow -->
<!-- $$$closeAllSubWindows[overload1]$$$closeAllSubWindows -->
<h3 class="fn" id="closeAllSubWindows"><a name="closeAllSubWindows"></a><code>[slot] </code><span class="type">void</span> QMdiArea::<span class="name">closeAllSubWindows</span>()</h3>
<p>Closes all subwindows by sending a <a href="../qtgui/qcloseevent.html">QCloseEvent</a> to each window. You may receive <a href="qmdiarea.html#subWindowActivated">subWindowActivated</a>() signals from subwindows before they are closed (if the MDI area activates the subwindow when another is closing).</p>
<p>Subwindows that ignore the close event will remain open.</p>
<p><b>See also </b><a href="qmdiarea.html#closeActiveSubWindow">closeActiveSubWindow</a>().</p>
<!-- @@@closeAllSubWindows -->
<!-- $$$currentSubWindow[overload1]$$$currentSubWindow -->
<h3 class="fn" id="currentSubWindow"><a name="currentSubWindow"></a><span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> *QMdiArea::<span class="name">currentSubWindow</span>() const</h3>
<p>Returns a pointer to the current subwindow, or 0 if there is no current subwindow.</p>
<p>This function will return the same as <a href="qmdiarea.html#activeSubWindow">activeSubWindow</a>() if the <a href="qapplication.html">QApplication</a> containing <a href="qmdiarea.html">QMdiArea</a> is active.</p>
<p><b>See also </b><a href="qmdiarea.html#activeSubWindow">activeSubWindow</a>() and <a href="qapplication.html#activeWindow">QApplication::activeWindow</a>().</p>
<!-- @@@currentSubWindow -->
<!-- $$$event[overload1]$$$eventQEvent* -->
<h3 class="fn" id="event"><a name="event"></a><code>[virtual protected] </code><span class="type">bool</span> QMdiArea::<span class="name">event</span>(<span class="type"><a href="../qtcore/qevent.html">QEvent</a></span> *<i>event</i>)</h3>
<p>Reimplemented from <a href="../qtcore/qobject.html#event">QObject::event</a>().</p>
<!-- @@@event -->
<!-- $$$eventFilter[overload1]$$$eventFilterQObject*QEvent* -->
<h3 class="fn" id="eventFilter"><a name="eventFilter"></a><code>[virtual protected] </code><span class="type">bool</span> QMdiArea::<span class="name">eventFilter</span>(<span class="type"><a href="../qtcore/qobject.html#QObject">QObject</a></span> *<i>object</i>, <span class="type"><a href="../qtcore/qevent.html">QEvent</a></span> *<i>event</i>)</h3>
<p>Reimplemented from <a href="../qtcore/qobject.html#eventFilter">QObject::eventFilter</a>().</p>
<!-- @@@eventFilter -->
<!-- $$$minimumSizeHint[overload1]$$$minimumSizeHint -->
<h3 class="fn" id="minimumSizeHint"><a name="minimumSizeHint"></a><code>[virtual] </code><span class="type"><a href="../qtcore/qsize.html">QSize</a></span> QMdiArea::<span class="name">minimumSizeHint</span>() const</h3>
<p>Reimplemented from <a href="qwidget.html#minimumSizeHint-prop">QWidget::minimumSizeHint</a>().</p>
<!-- @@@minimumSizeHint -->
<!-- $$$paintEvent[overload1]$$$paintEventQPaintEvent* -->
<h3 class="fn" id="paintEvent"><a name="paintEvent"></a><code>[virtual protected] </code><span class="type">void</span> QMdiArea::<span class="name">paintEvent</span>(<span class="type"><a href="../qtgui/qpaintevent.html">QPaintEvent</a></span> *<i>paintEvent</i>)</h3>
<p>Reimplemented from <a href="qwidget.html#paintEvent">QWidget::paintEvent</a>().</p>
<!-- @@@paintEvent -->
<!-- $$$removeSubWindow[overload1]$$$removeSubWindowQWidget* -->
<h3 class="fn" id="removeSubWindow"><a name="removeSubWindow"></a><span class="type">void</span> QMdiArea::<span class="name">removeSubWindow</span>(<span class="type"><a href="qwidget.html#QWidget">QWidget</a></span> *<i>widget</i>)</h3>
<p>Removes <i>widget</i> from the MDI area. The <i>widget</i> must be either a <a href="qmdisubwindow.html">QMdiSubWindow</a> or a widget that is the internal widget of a subwindow. Note <i>widget</i> is never actually deleted by <a href="qmdiarea.html">QMdiArea</a>. If a <a href="qmdisubwindow.html">QMdiSubWindow</a> is passed in its parent is set to 0 and it is removed, but if an internal widget is passed in the child widget is set to 0 but the <a href="qmdisubwindow.html">QMdiSubWindow</a> is not removed.</p>
<p><b>See also </b><a href="qmdiarea.html#addSubWindow">addSubWindow</a>().</p>
<!-- @@@removeSubWindow -->
<!-- $$$resizeEvent[overload1]$$$resizeEventQResizeEvent* -->
<h3 class="fn" id="resizeEvent"><a name="resizeEvent"></a><code>[virtual protected] </code><span class="type">void</span> QMdiArea::<span class="name">resizeEvent</span>(<span class="type"><a href="../qtgui/qresizeevent.html">QResizeEvent</a></span> *<i>resizeEvent</i>)</h3>
<p>Reimplemented from <a href="qwidget.html#resizeEvent">QWidget::resizeEvent</a>().</p>
<!-- @@@resizeEvent -->
<!-- $$$scrollContentsBy[overload1]$$$scrollContentsByintint -->
<h3 class="fn" id="scrollContentsBy"><a name="scrollContentsBy"></a><code>[virtual protected] </code><span class="type">void</span> QMdiArea::<span class="name">scrollContentsBy</span>(<span class="type">int</span> <i>dx</i>, <span class="type">int</span> <i>dy</i>)</h3>
<p>Reimplemented from <a href="qabstractscrollarea.html#scrollContentsBy">QAbstractScrollArea::scrollContentsBy</a>().</p>
<!-- @@@scrollContentsBy -->
<!-- $$$setActiveSubWindow[overload1]$$$setActiveSubWindowQMdiSubWindow* -->
<h3 class="fn" id="setActiveSubWindow"><a name="setActiveSubWindow"></a><code>[slot] </code><span class="type">void</span> QMdiArea::<span class="name">setActiveSubWindow</span>(<span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> *<i>window</i>)</h3>
<p>Activates the subwindow <i>window</i>. If <i>window</i> is 0, any current active window is deactivated.</p>
<p><b>See also </b><a href="qmdiarea.html#activeSubWindow">activeSubWindow</a>().</p>
<!-- @@@setActiveSubWindow -->
<!-- $$$setOption[overload1]$$$setOptionAreaOptionbool -->
<h3 class="fn" id="setOption"><a name="setOption"></a><span class="type">void</span> QMdiArea::<span class="name">setOption</span>(<span class="type"><a href="qmdiarea.html#AreaOption-enum">AreaOption</a></span> <i>option</i>, <span class="type">bool</span> <i>on</i> = true)</h3>
<p>If <i>on</i> is true, <i>option</i> is enabled on the MDI area; otherwise it is disabled. See <a href="qmdiarea.html#AreaOption-enum">AreaOption</a> for the effect of each option.</p>
<p><b>See also </b><a href="qmdiarea.html#AreaOption-enum">AreaOption</a> and <a href="qmdiarea.html#testOption">testOption</a>().</p>
<!-- @@@setOption -->
<!-- $$$setupViewport[overload1]$$$setupViewportQWidget* -->
<h3 class="fn" id="setupViewport"><a name="setupViewport"></a><code>[virtual protected slot] </code><span class="type">void</span> QMdiArea::<span class="name">setupViewport</span>(<span class="type"><a href="qwidget.html#QWidget">QWidget</a></span> *<i>viewport</i>)</h3>
<p>Reimplemented from <a href="qabstractscrollarea.html#setupViewport">QAbstractScrollArea::setupViewport</a>().</p>
<p>This slot is called by <a href="qabstractscrollarea.html">QAbstractScrollArea</a> after <a href="qabstractscrollarea.html#setViewport">setViewport</a>() has been called. Reimplement this function in a subclass of <a href="qmdiarea.html">QMdiArea</a> to initialize the new <i>viewport</i> before it is used.</p>
<p><b>See also </b><a href="qabstractscrollarea.html#setViewport">setViewport</a>().</p>
<!-- @@@setupViewport -->
<!-- $$$showEvent[overload1]$$$showEventQShowEvent* -->
<h3 class="fn" id="showEvent"><a name="showEvent"></a><code>[virtual protected] </code><span class="type">void</span> QMdiArea::<span class="name">showEvent</span>(<span class="type"><a href="../qtgui/qshowevent.html">QShowEvent</a></span> *<i>showEvent</i>)</h3>
<p>Reimplemented from <a href="qwidget.html#showEvent">QWidget::showEvent</a>().</p>
<!-- @@@showEvent -->
<!-- $$$sizeHint[overload1]$$$sizeHint -->
<h3 class="fn" id="sizeHint"><a name="sizeHint"></a><code>[virtual] </code><span class="type"><a href="../qtcore/qsize.html">QSize</a></span> QMdiArea::<span class="name">sizeHint</span>() const</h3>
<p>Reimplemented from <a href="qwidget.html#sizeHint-prop">QWidget::sizeHint</a>().</p>
<!-- @@@sizeHint -->
<!-- $$$subWindowActivated[overload1]$$$subWindowActivatedQMdiSubWindow* -->
<h3 class="fn" id="subWindowActivated"><a name="subWindowActivated"></a><code>[signal] </code><span class="type">void</span> QMdiArea::<span class="name">subWindowActivated</span>(<span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> *<i>window</i>)</h3>
<p><a href="qmdiarea.html">QMdiArea</a> emits this signal after <i>window</i> has been activated. When <i>window</i> is 0, <a href="qmdiarea.html">QMdiArea</a> has just deactivated its last active window, and there are no active windows on the workspace.</p>
<p><b>See also </b><a href="qmdiarea.html#activeSubWindow">QMdiArea::activeSubWindow</a>().</p>
<!-- @@@subWindowActivated -->
<!-- $$$subWindowList[overload1]$$$subWindowListWindowOrder -->
<h3 class="fn" id="subWindowList"><a name="subWindowList"></a><span class="type"><a href="../qtcore/qlist.html">QList</a></span>&lt;<span class="type"><a href="qmdisubwindow.html">QMdiSubWindow</a></span> *&gt; QMdiArea::<span class="name">subWindowList</span>(<span class="type"><a href="qmdiarea.html#WindowOrder-enum">WindowOrder</a></span> <i>order</i> = CreationOrder) const</h3>
<p>Returns a list of all subwindows in the MDI area. If <i>order</i> is <a href="qmdiarea.html#WindowOrder-enum">CreationOrder</a> (the default), the windows are sorted in the order in which they were inserted into the workspace. If <i>order</i> is <a href="qmdiarea.html#WindowOrder-enum">StackingOrder</a>, the windows are listed in their stacking order, with the topmost window as the last item in the list. If <i>order</i> is <a href="qmdiarea.html#WindowOrder-enum">ActivationHistoryOrder</a>, the windows are listed according to their recent activation history.</p>
<p><b>See also </b><a href="qmdiarea.html#WindowOrder-enum">WindowOrder</a>.</p>
<!-- @@@subWindowList -->
<!-- $$$testOption[overload1]$$$testOptionAreaOption -->
<h3 class="fn" id="testOption"><a name="testOption"></a><span class="type">bool</span> QMdiArea::<span class="name">testOption</span>(<span class="type"><a href="qmdiarea.html#AreaOption-enum">AreaOption</a></span> <i>option</i>) const</h3>
<p>Returns <code>true</code> if <i>option</i> is enabled; otherwise returns <code>false</code>.</p>
<p><b>See also </b><a href="qmdiarea.html#AreaOption-enum">AreaOption</a> and <a href="qmdiarea.html#setOption">setOption</a>().</p>
<!-- @@@testOption -->
<!-- $$$tileSubWindows[overload1]$$$tileSubWindows -->
<h3 class="fn" id="tileSubWindows"><a name="tileSubWindows"></a><code>[slot] </code><span class="type">void</span> QMdiArea::<span class="name">tileSubWindows</span>()</h3>
<p>Arranges all child windows in a tile pattern.</p>
<p><b>See also </b><a href="qmdiarea.html#cascadeSubWindows">cascadeSubWindows</a>().</p>
<!-- @@@tileSubWindows -->
<!-- $$$timerEvent[overload1]$$$timerEventQTimerEvent* -->
<h3 class="fn" id="timerEvent"><a name="timerEvent"></a><code>[virtual protected] </code><span class="type">void</span> QMdiArea::<span class="name">timerEvent</span>(<span class="type"><a href="../qtcore/qtimerevent.html">QTimerEvent</a></span> *<i>timerEvent</i>)</h3>
<p>Reimplemented from <a href="../qtcore/qobject.html#timerEvent">QObject::timerEvent</a>().</p>
<!-- @@@timerEvent -->
<!-- $$$viewportEvent[overload1]$$$viewportEventQEvent* -->
<h3 class="fn" id="viewportEvent"><a name="viewportEvent"></a><code>[virtual protected] </code><span class="type">bool</span> QMdiArea::<span class="name">viewportEvent</span>(<span class="type"><a href="../qtcore/qevent.html">QEvent</a></span> *<i>event</i>)</h3>
<p>Reimplemented from <a href="qabstractscrollarea.html#viewportEvent">QAbstractScrollArea::viewportEvent</a>().</p>
<!-- @@@viewportEvent -->
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