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<title>Qt 4.6: Qt 3 Support Members for QWidget</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="functions.html"><font color="#004faf">All Functions</font></a> · <a href="overviews.html"><font color="#004faf">Overviews</font></a></td></tr></table><h1 class="title">Qt 3 Support Members for QWidget</h1>
<p><b>The following class members are part of the <a href="qt3support.html">Qt 3 support layer</a>.</b> They are provided to help you port old code to Qt 4. We advise against using them in new code.</p>
<p><ul><li><a href="qwidget.html">QWidget class reference</a></li></ul></p>
<h2>Public Types</h2>
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<tr><td class="memItemLeft" align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#BackgroundOrigin-enum">BackgroundOrigin</a></b> { WidgetOrigin, ParentOrigin, WindowOrigin, AncestorOrigin }</td></tr>
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<h2>Public Functions</h2>
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<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#QWidget-3">QWidget</a></b> ( QWidget * <i>parent</i>, const char * <i>name</i>, Qt::WindowFlags <i>f</i> = 0 )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">Qt::BackgroundMode </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#backgroundMode">backgroundMode</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QPoint </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#backgroundOffset">backgroundOffset</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">BackgroundOrigin </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#backgroundOrigin">backgroundOrigin</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QString </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#caption">caption</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QWidget * </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#childAt-2">childAt</a></b> ( int <i>x</i>, int <i>y</i>, bool <i>includeThis</i> ) const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QWidget * </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#childAt-3">childAt</a></b> ( const QPoint & <i>p</i>, bool <i>includeThis</i> ) const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#close-2">close</a></b> ( bool <i>alsoDelete</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QColorGroup </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#colorGroup">colorGroup</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#constPolish">constPolish</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#drawText">drawText</a></b> ( const QPoint & <i>p</i>, const QString & <i>s</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#drawText-2">drawText</a></b> ( int <i>x</i>, int <i>y</i>, const QString & <i>s</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#erase">erase</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#erase-2">erase</a></b> ( int <i>x</i>, int <i>y</i>, int <i>w</i>, int <i>h</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#erase-3">erase</a></b> ( const QRect & <i>rect</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#erase-4">erase</a></b> ( const QRegion & <i>rgn</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#hasMouse">hasMouse</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const QPixmap * </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#icon">icon</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QString </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#iconText">iconText</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#iconify">iconify</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#isDesktop">isDesktop</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#isDialog">isDialog</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#isInputMethodEnabled">isInputMethodEnabled</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#isPopup">isPopup</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#isShown">isShown</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#isUpdatesEnabled">isUpdatesEnabled</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#isVisibleToTLW">isVisibleToTLW</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#ownCursor">ownCursor</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#ownFont">ownFont</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#ownPalette">ownPalette</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QWidget * </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#parentWidget-2">parentWidget</a></b> ( bool <i>sameWindow</i> ) const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#polish">polish</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#recreate">recreate</a></b> ( QWidget * <i>parent</i>, Qt::WindowFlags <i>f</i>, const QPoint & <i>p</i>, bool <i>showIt</i> = false )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#repaint-2">repaint</a></b> ( bool <i>b</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#repaint-3">repaint</a></b> ( int <i>x</i>, int <i>y</i>, int <i>w</i>, int <i>h</i>, bool <i>b</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#repaint-4">repaint</a></b> ( const QRect & <i>r</i>, bool <i>b</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#repaint-5">repaint</a></b> ( const QRegion & <i>rgn</i>, bool <i>b</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#reparent">reparent</a></b> ( QWidget * <i>parent</i>, Qt::WindowFlags <i>f</i>, const QPoint & <i>p</i>, bool <i>showIt</i> = false )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#reparent-2">reparent</a></b> ( QWidget * <i>parent</i>, const QPoint & <i>p</i>, bool <i>showIt</i> = false )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setActiveWindow">setActiveWindow</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setBackgroundColor">setBackgroundColor</a></b> ( const QColor & <i>color</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setBackgroundMode">setBackgroundMode</a></b> ( Qt::BackgroundMode <i>widgetBackground</i>, Qt::BackgroundMode <i>paletteBackground</i> = Qt::PaletteBackground )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setBackgroundOrigin">setBackgroundOrigin</a></b> ( BackgroundOrigin <i>background</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setBackgroundPixmap">setBackgroundPixmap</a></b> ( const QPixmap & <i>pixmap</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setCaption">setCaption</a></b> ( const QString & <i>c</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setEraseColor">setEraseColor</a></b> ( const QColor & <i>color</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setErasePixmap">setErasePixmap</a></b> ( const QPixmap & <i>pixmap</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setFont-2">setFont</a></b> ( const QFont & <i>f</i>, bool <i>b</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setIcon">setIcon</a></b> ( const QPixmap & <i>i</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setIconText">setIconText</a></b> ( const QString & <i>it</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setInputMethodEnabled">setInputMethodEnabled</a></b> ( bool <i>enabled</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setKeyCompression">setKeyCompression</a></b> ( bool <i>b</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setPalette-2">setPalette</a></b> ( const QPalette & <i>p</i>, bool <i>b</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setPaletteBackgroundColor">setPaletteBackgroundColor</a></b> ( const QColor & <i>color</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setPaletteBackgroundPixmap">setPaletteBackgroundPixmap</a></b> ( const QPixmap & <i>pixmap</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setPaletteForegroundColor">setPaletteForegroundColor</a></b> ( const QColor & <i>color</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setSizePolicy-2">setSizePolicy</a></b> ( QSizePolicy::Policy <i>hor</i>, QSizePolicy::Policy <i>ver</i>, bool <i>hfw</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QStyle * </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setStyle-2">setStyle</a></b> ( const QString & <i>style</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#unsetFont">unsetFont</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#unsetPalette">unsetPalette</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QRect </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#visibleRect">visibleRect</a></b> () const</td></tr>
</table>
<ul>
<li><div bar="2" class="fn"></div>8 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li>
<li><div bar="2" class="fn"></div>8 public functions inherited from <a href="qpaintdevice.html#public-functions">QPaintDevice</a></li>
</ul>
<h2>Public Slots</h2>
<table class="alignedsummary" border="0" cellpadding="0" cellspacing="0" width="100%">
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#setShown">setShown</a></b> ( bool <i>shown</i> )</td></tr>
</table>
<h2>Static Public Members</h2>
<table class="alignedsummary" border="0" cellpadding="0" cellspacing="0" width="100%">
<tr><td class="memItemLeft" align="right" valign="top">QWidgetMapper * </td><td class="memItemRight" valign="bottom"><b><a href="qwidget-qt3.html#wmapper">wmapper</a></b> ()</td></tr>
</table>
<ul>
<li><div bar="2" class="fn"></div>13 static public members inherited from <a href="qpaintdevice.html#static-public-members">QPaintDevice</a></li>
</ul>
<hr />
<h2>Member Type Documentation</h2>
<a name="//apple_ref/cpp/tag/QWidget/BackgroundOrigin"></a>
<a name="//apple_ref/cpp/econst/QWidget/WidgetOrigin"></a>
<a name="//apple_ref/cpp/econst/QWidget/ParentOrigin"></a>
<a name="//apple_ref/cpp/econst/QWidget/WindowOrigin"></a>
<a name="//apple_ref/cpp/econst/QWidget/AncestorOrigin"></a>
<h3 class="fn"><a name="BackgroundOrigin-enum"></a>enum QWidget::BackgroundOrigin</h3>
<p><table class="valuelist" border="1" cellpadding="2" cellspacing="1" width="40%">
<tr><th width="60%">Constant</th><th width="40%">Value</th></tr>
<tr><td valign="top"><tt>QWidget::WidgetOrigin</tt></td><td align="center" valign="top"><tt>0</tt></td></tr>
<tr><td valign="top"><tt>QWidget::ParentOrigin</tt></td><td align="center" valign="top"><tt>1</tt></td></tr>
<tr><td valign="top"><tt>QWidget::WindowOrigin</tt></td><td align="center" valign="top"><tt>2</tt></td></tr>
<tr><td valign="top"><tt>QWidget::AncestorOrigin</tt></td><td align="center" valign="top"><tt>3</tt></td></tr>
</table></p>
<hr />
<h2>Member Function Documentation</h2>
<h3 class="fn"><a name="QWidget-3"></a>QWidget::QWidget ( QWidget * <i>parent</i>, const char * <i>name</i>, <a href="qt.html#WindowType-enum">Qt::WindowFlags</a> <i>f</i> = 0 )</h3>
<p>This is an overloaded function.</p>
<a name="//apple_ref/cpp/instm/QWidget/backgroundMode"></a>
<h3 class="fn"><a name="backgroundMode"></a><a href="qt-qt3.html#BackgroundMode-enum">Qt::BackgroundMode</a> QWidget::backgroundMode () const</h3>
<p>Returns the color role used for painting the widget's background.</p>
<p>Use <a href="qpalette.html">QPalette</a>(backgroundRole(()) instead.</p>
<p>See also <a href="qwidget-qt3.html#setBackgroundMode">setBackgroundMode</a>().</p>
<a name="//apple_ref/cpp/instm/QWidget/backgroundOffset"></a>
<h3 class="fn"><a name="backgroundOffset"></a><a href="qpoint.html">QPoint</a> QWidget::backgroundOffset () const</h3>
<p>Always returns QPoint().</p>
<a name="//apple_ref/cpp/instm/QWidget/backgroundOrigin"></a>
<h3 class="fn"><a name="backgroundOrigin"></a><a href="qwidget-qt3.html#BackgroundOrigin-enum">BackgroundOrigin</a> QWidget::backgroundOrigin () const</h3>
<p>Always returns <tt>WindowOrigin</tt>.</p>
<p>See also <a href="qwidget-qt3.html#setBackgroundOrigin">setBackgroundOrigin</a>().</p>
<a name="//apple_ref/cpp/instm/QWidget/caption"></a>
<h3 class="fn"><a name="caption"></a><a href="qstring.html">QString</a> QWidget::caption () const</h3>
<p>Use <a href="qwidget.html#windowTitle-prop">windowTitle</a>() instead.</p>
<p>See also <a href="qwidget-qt3.html#setCaption">setCaption</a>().</p>
<h3 class="fn"><a name="childAt-2"></a>QWidget * QWidget::childAt ( int <i>x</i>, int <i>y</i>, bool <i>includeThis</i> ) const</h3>
<p>Use the <a href="qwidget.html#childAt">childAt</a>() overload that doesn't have an <i>includeThis</i> parameter.</p>
<p>For example, if you have code like</p>
<pre><font color="#404040"> return widget->childAt(x, y, true);</font></pre>
<p>you can rewrite it as</p>
<pre> QWidget *child = widget->childAt(x, y, true);
if (child)
return child;
if (widget->rect().contains(x, y))
return widget;</pre>
<h3 class="fn"><a name="childAt-3"></a>QWidget * QWidget::childAt ( const <a href="qpoint.html">QPoint</a> & <i>p</i>, bool <i>includeThis</i> ) const</h3>
<p>Use the single point argument overload instead.</p>
<h3 class="fn"><a name="close-2"></a>bool QWidget::close ( bool <i>alsoDelete</i> )</h3>
<p>Closes the widget.</p>
<p>Use the no-argument overload instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/colorGroup"></a>
<h3 class="fn"><a name="colorGroup"></a><a href="qcolorgroup.html">QColorGroup</a> QWidget::colorGroup () const</h3>
<p>Use <a href="qcolorgroup.html">QColorGroup</a>(<a href="qwidget.html#palette-prop">palette</a>()) instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/constPolish"></a>
<h3 class="fn"><a name="constPolish"></a>void QWidget::constPolish () const</h3>
<p>Use <a href="qwidget.html#ensurePolished">ensurePolished</a>() instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/drawText"></a>
<h3 class="fn"><a name="drawText"></a>void QWidget::drawText ( const <a href="qpoint.html">QPoint</a> & <i>p</i>, const <a href="qstring.html">QString</a> & <i>s</i> )</h3>
<p>Drawing may only take place in a <a href="qpaintevent.html">QPaintEvent</a>. Overload <a href="qwidget.html#paintEvent">paintEvent</a>() to do your drawing and call <a href="qwidget.html#update">update</a>() to schedule a replaint whenever necessary. See also <a href="qpainter.html">QPainter</a>.</p>
<h3 class="fn"><a name="drawText-2"></a>void QWidget::drawText ( int <i>x</i>, int <i>y</i>, const <a href="qstring.html">QString</a> & <i>s</i> )</h3>
<p>Drawing may only take place in a <a href="qpaintevent.html">QPaintEvent</a>. Overload <a href="qwidget.html#paintEvent">paintEvent</a>() to do your drawing and call <a href="qwidget.html#update">update</a>() to schedule a replaint whenever necessary. See also <a href="qpainter.html">QPainter</a>.</p>
<a name="//apple_ref/cpp/instm/QWidget/erase"></a>
<h3 class="fn"><a name="erase"></a>void QWidget::erase ()</h3>
<p>Drawing may only take place in a <a href="qpaintevent.html">QPaintEvent</a>. Overload <a href="qwidget.html#paintEvent">paintEvent</a>() to do your erasing and call <a href="qwidget.html#update">update</a>() to schedule a replaint whenever necessary. See also <a href="qpainter.html">QPainter</a>.</p>
<h3 class="fn"><a name="erase-2"></a>void QWidget::erase ( int <i>x</i>, int <i>y</i>, int <i>w</i>, int <i>h</i> )</h3>
<p>Drawing may only take place in a <a href="qpaintevent.html">QPaintEvent</a>. Overload <a href="qwidget.html#paintEvent">paintEvent</a>() to do your erasing and call <a href="qwidget.html#update">update</a>() to schedule a replaint whenever necessary. See also <a href="qpainter.html">QPainter</a>.</p>
<h3 class="fn"><a name="erase-3"></a>void QWidget::erase ( const <a href="qrect.html">QRect</a> & <i>rect</i> )</h3>
<p>Drawing may only take place in a <a href="qpaintevent.html">QPaintEvent</a>. Overload <a href="qwidget.html#paintEvent">paintEvent</a>() to do your erasing and call <a href="qwidget.html#update">update</a>() to schedule a replaint whenever necessary. See also <a href="qpainter.html">QPainter</a>.</p>
<h3 class="fn"><a name="erase-4"></a>void QWidget::erase ( const <a href="qregion.html">QRegion</a> & <i>rgn</i> )</h3>
<p>This is an overloaded function.</p>
<p>Clear the given region, <i>rgn</i>.</p>
<p>Drawing may only take place in a <a href="qpaintevent.html">QPaintEvent</a>. Overload <a href="qwidget.html#paintEvent">paintEvent</a>() to do your erasing and call <a href="qwidget.html#update">update</a>() to schedule a replaint whenever necessary. See also <a href="qpainter.html">QPainter</a>.</p>
<a name="//apple_ref/cpp/instm/QWidget/hasMouse"></a>
<h3 class="fn"><a name="hasMouse"></a>bool QWidget::hasMouse () const</h3>
<p>Use testAttribute(<a href="qt.html#WidgetAttribute-enum">Qt::WA_UnderMouse</a>) instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/icon"></a>
<h3 class="fn"><a name="icon"></a>const <a href="qpixmap.html">QPixmap</a> * QWidget::icon () const</h3>
<p>Return's the widget's icon.</p>
<p>Use <a href="qwidget.html#windowIcon-prop">windowIcon</a>() instead.</p>
<p>See also <a href="qwidget-qt3.html#setIcon">setIcon</a>().</p>
<a name="//apple_ref/cpp/instm/QWidget/iconText"></a>
<h3 class="fn"><a name="iconText"></a><a href="qstring.html">QString</a> QWidget::iconText () const</h3>
<p>Use <a href="qwidget.html#windowIconText-prop">windowIconText</a>() instead.</p>
<p>See also <a href="qwidget-qt3.html#setIconText">setIconText</a>().</p>
<a name="//apple_ref/cpp/instm/QWidget/iconify"></a>
<h3 class="fn"><a name="iconify"></a>void QWidget::iconify ()</h3>
<p>Use <a href="qwidget.html#showMinimized">showMinimized</a>() instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/isDesktop"></a>
<h3 class="fn"><a name="isDesktop"></a>bool QWidget::isDesktop () const</h3>
<p>Use <a href="qwidget.html#windowType">windowType</a>() == <a href="qt.html#WindowType-enum">Qt::Desktop</a> instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/isDialog"></a>
<h3 class="fn"><a name="isDialog"></a>bool QWidget::isDialog () const</h3>
<p>Use <a href="qwidget.html#windowType">windowType</a>() == <a href="qt.html#WindowType-enum">Qt::Dialog</a> instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/isInputMethodEnabled"></a>
<h3 class="fn"><a name="isInputMethodEnabled"></a>bool QWidget::isInputMethodEnabled () const</h3>
<p>Use testAttribute(<a href="qt.html#WidgetAttribute-enum">Qt::WA_InputMethodEnabled</a>) instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/isPopup"></a>
<h3 class="fn"><a name="isPopup"></a>bool QWidget::isPopup () const</h3>
<p>Use <a href="qwidget.html#windowType">windowType</a>() == <a href="qt.html#WindowType-enum">Qt::Popup</a> instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/isShown"></a>
<h3 class="fn"><a name="isShown"></a>bool QWidget::isShown () const</h3>
<p>Use !<a href="qwidget.html#isHidden">isHidden</a>() instead (notice the exclamation mark), or use <a href="qwidget.html#visible-prop">isVisible</a>() to check whether the widget is visible.</p>
<a name="//apple_ref/cpp/instm/QWidget/isUpdatesEnabled"></a>
<h3 class="fn"><a name="isUpdatesEnabled"></a>bool QWidget::isUpdatesEnabled () const</h3>
<p>Use the <a href="qwidget.html#updatesEnabled-prop">updatesEnabled</a> property instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/isVisibleToTLW"></a>
<h3 class="fn"><a name="isVisibleToTLW"></a>bool QWidget::isVisibleToTLW () const</h3>
<p>Use <a href="qwidget.html#visible-prop">isVisible</a>() instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/ownCursor"></a>
<h3 class="fn"><a name="ownCursor"></a>bool QWidget::ownCursor () const</h3>
<p>Use testAttribute(<a href="qt.html#WidgetAttribute-enum">Qt::WA_SetCursor</a>) instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/ownFont"></a>
<h3 class="fn"><a name="ownFont"></a>bool QWidget::ownFont () const</h3>
<p>Use testAttribute(<a href="qt.html#WidgetAttribute-enum">Qt::WA_SetFont</a>) instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/ownPalette"></a>
<h3 class="fn"><a name="ownPalette"></a>bool QWidget::ownPalette () const</h3>
<p>Use testAttribute(<a href="qt.html#WidgetAttribute-enum">Qt::WA_SetPalette</a>) instead.</p>
<h3 class="fn"><a name="parentWidget-2"></a>QWidget * QWidget::parentWidget ( bool <i>sameWindow</i> ) const</h3>
<p>Use the no-argument overload instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/polish"></a>
<h3 class="fn"><a name="polish"></a>void QWidget::polish ()</h3>
<p>Use <a href="qwidget.html#ensurePolished">ensurePolished</a>() instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/recreate"></a>
<h3 class="fn"><a name="recreate"></a>void QWidget::recreate ( QWidget * <i>parent</i>, <a href="qt.html#WindowType-enum">Qt::WindowFlags</a> <i>f</i>, const <a href="qpoint.html">QPoint</a> & <i>p</i>, bool <i>showIt</i> = false )</h3>
<p>Use <a href="qwidget.html#setParent">setParent</a>() to change the parent or the widget's widget flags; use <a href="qwidget.html#pos-prop">move</a>() to move the widget, and use <a href="qwidget.html#show">show</a>() to show the widget.</p>
<h3 class="fn"><a name="repaint-2"></a>void QWidget::repaint ( bool <i>b</i> )</h3>
<p>The boolean parameter <i>b</i> is ignored. Use the no-argument overload instead.</p>
<h3 class="fn"><a name="repaint-3"></a>void QWidget::repaint ( int <i>x</i>, int <i>y</i>, int <i>w</i>, int <i>h</i>, bool <i>b</i> )</h3>
<p>The boolean parameter <i>b</i> is ignored. Use the four-argument overload instead.</p>
<h3 class="fn"><a name="repaint-4"></a>void QWidget::repaint ( const <a href="qrect.html">QRect</a> & <i>r</i>, bool <i>b</i> )</h3>
<p>The boolean parameter <i>b</i> is ignored. Use the single rect-argument overload instead.</p>
<h3 class="fn"><a name="repaint-5"></a>void QWidget::repaint ( const <a href="qregion.html">QRegion</a> & <i>rgn</i>, bool <i>b</i> )</h3>
<p>The boolean parameter <i>b</i> is ignored. Use the single region-argument overload instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/reparent"></a>
<h3 class="fn"><a name="reparent"></a>void QWidget::reparent ( QWidget * <i>parent</i>, <a href="qt.html#WindowType-enum">Qt::WindowFlags</a> <i>f</i>, const <a href="qpoint.html">QPoint</a> & <i>p</i>, bool <i>showIt</i> = false )</h3>
<p>Use <a href="qwidget.html#setParent">setParent</a>() to change the parent or the widget's widget flags; use <a href="qwidget.html#pos-prop">move</a>() to move the widget, and use <a href="qwidget.html#show">show</a>() to show the widget.</p>
<h3 class="fn"><a name="reparent-2"></a>void QWidget::reparent ( QWidget * <i>parent</i>, const <a href="qpoint.html">QPoint</a> & <i>p</i>, bool <i>showIt</i> = false )</h3>
<p>Use <a href="qwidget.html#setParent">setParent</a>() to change the parent; use <a href="qwidget.html#pos-prop">move</a>() to move the widget, and use <a href="qwidget.html#show">show</a>() to show the widget.</p>
<a name="//apple_ref/cpp/instm/QWidget/setActiveWindow"></a>
<h3 class="fn"><a name="setActiveWindow"></a>void QWidget::setActiveWindow ()</h3>
<p>Use <a href="qwidget.html#activateWindow">activateWindow</a>() instead.</p>
<p>See also <a href="qwidget.html#isActiveWindow-prop">isActiveWindow</a>().</p>
<a name="//apple_ref/cpp/instm/QWidget/setBackgroundColor"></a>
<h3 class="fn"><a name="setBackgroundColor"></a>void QWidget::setBackgroundColor ( const <a href="qcolor.html">QColor</a> & <i>color</i> )</h3>
<p>Use the palette instead.</p>
<p>For example, if you have code like</p>
<pre><font color="#404040"> widget->setBackgroundColor(color);</font></pre>
<p>you can rewrite it as</p>
<pre> QPalette palette;
palette.setColor(widget->backgroundRole(), color);
widget->setPalette(palette);</pre>
<a name="//apple_ref/cpp/instm/QWidget/setBackgroundMode"></a>
<h3 class="fn"><a name="setBackgroundMode"></a>void QWidget::setBackgroundMode ( <a href="qt-qt3.html#BackgroundMode-enum">Qt::BackgroundMode</a> <i>widgetBackground</i>, <a href="qt-qt3.html#BackgroundMode-enum">Qt::BackgroundMode</a> <i>paletteBackground</i> = Qt::PaletteBackground )</h3>
<p>Sets the color role used for painting the widget's background to background mode <i>widgetBackground</i>. The <i>paletteBackground</i> mode parameter is ignored.</p>
<p>See also <a href="qwidget-qt3.html#backgroundMode">backgroundMode</a>().</p>
<a name="//apple_ref/cpp/instm/QWidget/setBackgroundOrigin"></a>
<h3 class="fn"><a name="setBackgroundOrigin"></a>void QWidget::setBackgroundOrigin ( <a href="qwidget-qt3.html#BackgroundOrigin-enum">BackgroundOrigin</a> <i>background</i> )</h3>
<p>See also <a href="qwidget-qt3.html#backgroundOrigin">backgroundOrigin</a>().</p>
<a name="//apple_ref/cpp/instm/QWidget/setBackgroundPixmap"></a>
<h3 class="fn"><a name="setBackgroundPixmap"></a>void QWidget::setBackgroundPixmap ( const <a href="qpixmap.html">QPixmap</a> & <i>pixmap</i> )</h3>
<p>Use the palette instead.</p>
<p>For example, if you have code like</p>
<pre><font color="#404040"> widget->setBackgroundPixmap(pixmap);</font></pre>
<p>you can rewrite it as</p>
<pre> QPalette palette;
palette.setBrush(widget->backgroundRole(), QBrush(pixmap));
widget->setPalette(palette);</pre>
<a name="//apple_ref/cpp/instm/QWidget/setCaption"></a>
<h3 class="fn"><a name="setCaption"></a>void QWidget::setCaption ( const <a href="qstring.html">QString</a> & <i>c</i> )</h3>
<p>Use <a href="qwidget.html#windowTitle-prop">setWindowTitle</a>() instead.</p>
<p>See also <a href="qwidget-qt3.html#caption">caption</a>().</p>
<a name="//apple_ref/cpp/instm/QWidget/setEraseColor"></a>
<h3 class="fn"><a name="setEraseColor"></a>void QWidget::setEraseColor ( const <a href="qcolor.html">QColor</a> & <i>color</i> )</h3>
<p>Use the palette instead.</p>
<p>For example, if you have code like</p>
<pre><font color="#404040"> widget->setEraseColor(color);</font></pre>
<p>you can rewrite it as</p>
<pre> QPalette palette;
palette.setColor(widget->backgroundRole(), color);
widget->setPalette(palette);</pre>
<a name="//apple_ref/cpp/instm/QWidget/setErasePixmap"></a>
<h3 class="fn"><a name="setErasePixmap"></a>void QWidget::setErasePixmap ( const <a href="qpixmap.html">QPixmap</a> & <i>pixmap</i> )</h3>
<p>Use the palette instead.</p>
<p>For example, if you have code like</p>
<pre><font color="#404040"> widget->setErasePixmap(pixmap);</font></pre>
<p>you can rewrite it as</p>
<pre> QPalette palette;
palette.setBrush(widget->backgroundRole(), QBrush(pixmap));
widget->setPalette(palette);</pre>
<h3 class="fn"><a name="setFont-2"></a>void QWidget::setFont ( const <a href="qfont.html">QFont</a> & <i>f</i>, bool <i>b</i> )</h3>
<p>Use the single-argument overload instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/setIcon"></a>
<h3 class="fn"><a name="setIcon"></a>void QWidget::setIcon ( const <a href="qpixmap.html">QPixmap</a> & <i>i</i> )</h3>
<p>Use <a href="qwidget.html#windowIcon-prop">setWindowIcon</a>() instead.</p>
<p>See also <a href="qwidget-qt3.html#icon">icon</a>().</p>
<a name="//apple_ref/cpp/instm/QWidget/setIconText"></a>
<h3 class="fn"><a name="setIconText"></a>void QWidget::setIconText ( const <a href="qstring.html">QString</a> & <i>it</i> )</h3>
<p>Use <a href="qwidget.html#windowIconText-prop">setWindowIconText</a>() instead.</p>
<p>See also <a href="qwidget-qt3.html#iconText">iconText</a>().</p>
<a name="//apple_ref/cpp/instm/QWidget/setInputMethodEnabled"></a>
<h3 class="fn"><a name="setInputMethodEnabled"></a>void QWidget::setInputMethodEnabled ( bool <i>enabled</i> )</h3>
<p>Use setAttribute(<a href="qt.html#WidgetAttribute-enum">Qt::WA_InputMethodEnabled</a>, <i>enabled</i>) instead.</p>
<p>See also <a href="qwidget-qt3.html#isInputMethodEnabled">isInputMethodEnabled</a>().</p>
<a name="//apple_ref/cpp/instm/QWidget/setKeyCompression"></a>
<h3 class="fn"><a name="setKeyCompression"></a>void QWidget::setKeyCompression ( bool <i>b</i> )</h3>
<p>Use setAttribute(<a href="qt.html#WidgetAttribute-enum">Qt::WA_KeyCompression</a>, b) instead.</p>
<h3 class="fn"><a name="setPalette-2"></a>void QWidget::setPalette ( const <a href="qpalette.html">QPalette</a> & <i>p</i>, bool <i>b</i> )</h3>
<p>Use the single-argument overload instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/setPaletteBackgroundColor"></a>
<h3 class="fn"><a name="setPaletteBackgroundColor"></a>void QWidget::setPaletteBackgroundColor ( const <a href="qcolor.html">QColor</a> & <i>color</i> )</h3>
<p>Use the palette directly.</p>
<p>For example, if you have code like</p>
<pre><font color="#404040"> widget->setPaletteBackgroundColor(color);</font></pre>
<p>you can rewrite it as</p>
<pre> QPalette palette;
palette.setColor(widget->backgroundRole(), color);
widget->setPalette(palette);</pre>
<a name="//apple_ref/cpp/instm/QWidget/setPaletteBackgroundPixmap"></a>
<h3 class="fn"><a name="setPaletteBackgroundPixmap"></a>void QWidget::setPaletteBackgroundPixmap ( const <a href="qpixmap.html">QPixmap</a> & <i>pixmap</i> )</h3>
<p>Use the palette directly.</p>
<p>For example, if you have code like</p>
<pre><font color="#404040"> widget->setPaletteBackgroundPixmap(pixmap);</font></pre>
<p>you can rewrite it as</p>
<pre> QPalette palette;
palette.setBrush(widget->backgroundRole(), QBrush(pixmap));
widget->setPalette(palette);</pre>
<a name="//apple_ref/cpp/instm/QWidget/setPaletteForegroundColor"></a>
<h3 class="fn"><a name="setPaletteForegroundColor"></a>void QWidget::setPaletteForegroundColor ( const <a href="qcolor.html">QColor</a> & <i>color</i> )</h3>
<p>Use the palette directly.</p>
<p>For example, if you have code like</p>
<pre><font color="#404040"> widget->setPaletteForegroundColor(color);</font></pre>
<p>you can rewrite it as</p>
<pre> QPalette palette;
palette.setColor(widget->foregroundRole(), color);
widget->setPalette(palette);</pre>
<a name="//apple_ref/cpp/instm/QWidget/setShown"></a>
<h3 class="fn"><a name="setShown"></a>void QWidget::setShown ( bool <i>shown</i> ) <tt> [slot]</tt></h3>
<p>Use setVisible(<i>shown</i>) instead.</p>
<p>See also <a href="qwidget-qt3.html#isShown">isShown</a>().</p>
<h3 class="fn"><a name="setSizePolicy-2"></a>void QWidget::setSizePolicy ( <a href="qsizepolicy.html#Policy-enum">QSizePolicy::Policy</a> <i>hor</i>, <a href="qsizepolicy.html#Policy-enum">QSizePolicy::Policy</a> <i>ver</i>, bool <i>hfw</i> )</h3>
<p>Use the <a href="qwidget.html#sizePolicy-prop">sizePolicy</a> property and <a href="qwidget.html#heightForWidth">heightForWidth</a>() function instead.</p>
<h3 class="fn"><a name="setStyle-2"></a><a href="qstyle.html">QStyle</a> * QWidget::setStyle ( const <a href="qstring.html">QString</a> & <i>style</i> )</h3>
<p>This is an overloaded function.</p>
<p>Sets the widget's GUI style to <i>style</i> using the <a href="qstylefactory.html">QStyleFactory</a>.</p>
<a name="//apple_ref/cpp/instm/QWidget/unsetFont"></a>
<h3 class="fn"><a name="unsetFont"></a>void QWidget::unsetFont ()</h3>
<p>Use setFont(<a href="porting4.html#qfont">QFont</a>()) instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/unsetPalette"></a>
<h3 class="fn"><a name="unsetPalette"></a>void QWidget::unsetPalette ()</h3>
<p>Use setPalette(QPalette()) instead.</p>
<a name="//apple_ref/cpp/instm/QWidget/visibleRect"></a>
<h3 class="fn"><a name="visibleRect"></a><a href="qrect.html">QRect</a> QWidget::visibleRect () const</h3>
<p>Use <a href="qwidget.html#visibleRegion">visibleRegion</a>() instead.</p>
<a name="//apple_ref/cpp/clm/QWidget/wmapper"></a>
<h3 class="fn"><a name="wmapper"></a>QWidgetMapper * QWidget::wmapper () <tt> [static]</tt></h3>
<p>The widget mapper is no longer part of the public API.</p>
<p /><address><hr /><div align="center">
<table width="100%" cellspacing="0" border="0"><tr class="address">
<td width="40%" align="left">Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
<td width="20%" align="center"><a href="trademarks.html">Trademarks</a></td>
<td width="40%" align="right"><div align="right">Qt 4.6.3</div></td>
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