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<h1 class="title">QRadioButton Class Reference</h1>
<!-- $$$QRadioButton-brief -->
<p>The QRadioButton widget provides a radio button with a text label. <a href="#details">More...</a></p>
<!-- @@@QRadioButton -->
<pre class="cpp"> <span class="preprocessor">#include <QRadioButton></span></pre><p><b>Inherits: </b><a href="qabstractbutton.html">QAbstractButton</a>.</p>
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<li><a href="qradiobutton-members.html">List of all members, including inherited members</a></li>
<li><a href="qradiobutton-qt3.html">Qt 3 support members</a></li>
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<a name="public-functions"></a>
<h2>Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qradiobutton.html#QRadioButton">QRadioButton</a></b> ( QWidget * <i>parent</i> = 0 )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qradiobutton.html#QRadioButton-2">QRadioButton</a></b> ( const QString & <i>text</i>, QWidget * <i>parent</i> = 0 )</td></tr>
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<a name="reimplemented-public-functions"></a>
<h2>Reimplemented Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> virtual QSize </td><td class="memItemRight bottomAlign"><b><a href="qradiobutton.html#minimumSizeHint">minimumSizeHint</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QSize </td><td class="memItemRight bottomAlign"><b><a href="qradiobutton.html#sizeHint">sizeHint</a></b> () const</td></tr>
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<li class="fn">21 public functions inherited from <a href="qabstractbutton.html#public-functions">QAbstractButton</a></li>
<li class="fn">221 public functions inherited from <a href="qwidget.html#public-functions">QWidget</a></li>
<li class="fn">29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li>
<li class="fn">13 public functions inherited from <a href="qpaintdevice.html#public-functions">QPaintDevice</a></li>
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<h2>Protected Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qradiobutton.html#initStyleOption">initStyleOption</a></b> ( QStyleOptionButton * <i>option</i> ) const</td></tr>
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<a name="reimplemented-protected-functions"></a>
<h2>Reimplemented Protected Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qradiobutton.html#event">event</a></b> ( QEvent * <i>e</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual bool </td><td class="memItemRight bottomAlign"><b><a href="qradiobutton.html#hitButton">hitButton</a></b> ( const QPoint & <i>pos</i> ) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qradiobutton.html#mouseMoveEvent">mouseMoveEvent</a></b> ( QMouseEvent * <i>e</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qradiobutton.html#paintEvent">paintEvent</a></b> ( QPaintEvent * )</td></tr>
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<li class="fn">14 protected functions inherited from <a href="qabstractbutton.html#protected-functions">QAbstractButton</a></li>
<li class="fn">37 protected functions inherited from <a href="qwidget.html#protected-functions">QWidget</a></li>
<li class="fn">8 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li>
<li class="fn">1 protected function inherited from <a href="qpaintdevice.html#protected-functions">QPaintDevice</a></li>
</ul>
<h3>Additional Inherited Members</h3>
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<li class="fn">11 properties inherited from <a href="qabstractbutton.html#properties">QAbstractButton</a></li>
<li class="fn">58 properties inherited from <a href="qwidget.html#properties">QWidget</a></li>
<li class="fn">1 property inherited from <a href="qobject.html#properties">QObject</a></li>
<li class="fn">5 public slots inherited from <a href="qabstractbutton.html#public-slots">QAbstractButton</a></li>
<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="qobject.html#public-slots">QObject</a></li>
<li class="fn">4 signals inherited from <a href="qabstractbutton.html#signals">QAbstractButton</a></li>
<li class="fn">1 signal inherited from <a href="qwidget.html#signals">QWidget</a></li>
<li class="fn">1 signal inherited from <a href="qobject.html#signals">QObject</a></li>
<li class="fn">4 static public members inherited from <a href="qwidget.html#static-public-members">QWidget</a></li>
<li class="fn">7 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li>
<li class="fn">1 protected slot inherited from <a href="qwidget.html#protected-slots">QWidget</a></li>
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<a name="details"></a>
<!-- $$$QRadioButton-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The QRadioButton widget provides a radio button with a text label.</p>
<p>A QRadioButton is an option button that can be switched on (checked) or off (unchecked). Radio buttons typically present the user with a "one of many" choice. In a group of radio buttons only one radio button at a time can be checked; if the user selects another button, the previously selected button is switched off.</p>
<p>Radio buttons are <a href="qabstractbutton.html#autoExclusive-prop">autoExclusive</a> by default. If auto-exclusive is enabled, radio buttons that belong to the same parent widget behave as if they were part of the same exclusive button group. If you need multiple exclusive button groups for radio buttons that belong to the same parent widget, put them into a <a href="qbuttongroup.html">QButtonGroup</a>.</p>
<p>Whenever a button is switched on or off it emits the <a href="qabstractbutton.html#toggled">toggled</a>() signal. Connect to this signal if you want to trigger an action each time the button changes state. Use <a href="qabstractbutton.html#checked-prop">isChecked</a>() to see if a particular button is selected.</p>
<p>Just like <a href="qpushbutton.html">QPushButton</a>, a radio button displays text, and optionally a small icon. The icon is set with <a href="qabstractbutton.html#icon-prop">setIcon</a>(). The text can be set in the constructor or with <a href="qabstractbutton.html#text-prop">setText</a>(). A shortcut key can be specified by preceding the preferred character with an ampersand in the text. For example:</p>
<pre class="cpp"> <span class="type">QRadioButton</span> <span class="operator">*</span>button <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QRadioButton</span>(<span class="string">"Search from the &cursor"</span><span class="operator">,</span> <span class="keyword">this</span>);</pre>
<p>In this example the shortcut is <i>Alt+c</i>. See the <a href="qshortcut.html#mnemonic">QShortcut</a> documentation for details (to display an actual ampersand, use '&&').</p>
<p>Important inherited members: <a href="qabstractbutton.html#text-prop">text</a>(), <a href="qabstractbutton.html#text-prop">setText</a>(), <a href="qabstractbutton.html#text-prop">text</a>(), <a href="qabstractbutton.html#down-prop">setDown</a>(), <a href="qabstractbutton.html#down-prop">isDown</a>(), <a href="qabstractbutton.html#autoRepeat-prop">autoRepeat</a>(), <a href="qabstractbutton.html#group">group</a>(), <a href="qabstractbutton.html#autoRepeat-prop">setAutoRepeat</a>(), <a href="qabstractbutton.html#toggle">toggle</a>(), <a href="qabstractbutton.html#pressed">pressed</a>(), <a href="qabstractbutton.html#released">released</a>(), <a href="qabstractbutton.html#clicked">clicked</a>(), and <a href="qabstractbutton.html#toggled">toggled</a>().</p>
<table class="generic" width="100%">
<tr valign="top" class="odd"><td ><img src="images/plastique-radiobutton.png" alt="Screenshot of a Plastique radio button" /></td><td >A radio button shown in the <a href="gallery-plastique.html">Plastique widget style</a>.</td></tr>
<tr valign="top" class="even"><td ><img src="images/windows-radiobutton.png" alt="Screenshot of a Windows XP radio button" /></td><td >A radio button shown in the <a href="gallery-windowsxp.html">Windows XP widget style</a>.</td></tr>
<tr valign="top" class="odd"><td ><img src="images/macintosh-radiobutton.png" alt="Screenshot of a Macintosh radio button" /></td><td >A radio button shown in the <a href="gallery-macintosh.html">Macintosh widget style</a>.</td></tr>
</table>
</div>
<p><b>See also </b><a href="qpushbutton.html">QPushButton</a>, <a href="qtoolbutton.html">QToolButton</a>, <a href="qcheckbox.html">QCheckBox</a>, <a href="guibooks.html#fowler">GUI Design Handbook: Radio Button</a>, and <a href="widgets-groupbox.html">Group Box Example</a>.</p>
<!-- @@@QRadioButton -->
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QRadioButton[overload1]$$$QRadioButtonQWidget* -->
<h3 class="fn"><a name="QRadioButton"></a>QRadioButton::<span class="name">QRadioButton</span> ( <span class="type"><a href="qwidget.html">QWidget</a></span> * <i>parent</i> = 0 )</h3>
<p>Constructs a radio button with the given <i>parent</i>, but with no text or pixmap.</p>
<p>The <i>parent</i> argument is passed on to the <a href="qabstractbutton.html">QAbstractButton</a> constructor.</p>
<!-- @@@QRadioButton -->
<!-- $$$QRadioButton$$$QRadioButtonconstQString&QWidget* -->
<h3 class="fn"><a name="QRadioButton-2"></a>QRadioButton::<span class="name">QRadioButton</span> ( const <span class="type"><a href="qstring.html">QString</a></span> & <i>text</i>, <span class="type"><a href="qwidget.html">QWidget</a></span> * <i>parent</i> = 0 )</h3>
<p>Constructs a radio button with the given <i>parent</i> and a <i>text</i> string.</p>
<p>The <i>parent</i> argument is passed on to the <a href="qabstractbutton.html">QAbstractButton</a> constructor.</p>
<!-- @@@QRadioButton -->
<!-- $$$event[overload1]$$$eventQEvent* -->
<h3 class="fn"><a name="event"></a><span class="type">bool</span> QRadioButton::<span class="name">event</span> ( <span class="type"><a href="qevent.html">QEvent</a></span> * <i>e</i> )<tt> [virtual protected]</tt></h3>
<p>Reimplemented from <a href="qobject.html#event">QObject::event</a>().</p>
<!-- @@@event -->
<!-- $$$hitButton[overload1]$$$hitButtonconstQPoint& -->
<h3 class="fn"><a name="hitButton"></a><span class="type">bool</span> QRadioButton::<span class="name">hitButton</span> ( const <span class="type"><a href="qpoint.html">QPoint</a></span> & <i>pos</i> ) const<tt> [virtual protected]</tt></h3>
<p>Reimplemented from <a href="qabstractbutton.html#hitButton">QAbstractButton::hitButton</a>().</p>
<!-- @@@hitButton -->
<!-- $$$initStyleOption[overload1]$$$initStyleOptionQStyleOptionButton* -->
<h3 class="fn"><a name="initStyleOption"></a><span class="type">void</span> QRadioButton::<span class="name">initStyleOption</span> ( <span class="type"><a href="qstyleoptionbutton.html">QStyleOptionButton</a></span> * <i>option</i> ) const<tt> [protected]</tt></h3>
<p>Initialize <i>option</i> with the values from this <a href="qradiobutton.html">QRadioButton</a>. This method is useful for subclasses when they need a <a href="qstyleoptionbutton.html">QStyleOptionButton</a>, but don't want to fill in all the information themselves.</p>
<p><b>See also </b><a href="qstyleoption.html#initFrom">QStyleOption::initFrom</a>().</p>
<!-- @@@initStyleOption -->
<!-- $$$minimumSizeHint[overload1]$$$minimumSizeHint -->
<h3 class="fn"><a name="minimumSizeHint"></a><span class="type"><a href="qsize.html">QSize</a></span> QRadioButton::<span class="name">minimumSizeHint</span> () const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qwidget.html#minimumSizeHint-prop">QWidget::minimumSizeHint</a>().</p>
<p>This function was introduced in Qt 4.8.</p>
<!-- @@@minimumSizeHint -->
<!-- $$$mouseMoveEvent[overload1]$$$mouseMoveEventQMouseEvent* -->
<h3 class="fn"><a name="mouseMoveEvent"></a><span class="type">void</span> QRadioButton::<span class="name">mouseMoveEvent</span> ( <span class="type"><a href="qmouseevent.html">QMouseEvent</a></span> * <i>e</i> )<tt> [virtual protected]</tt></h3>
<p>Reimplemented from <a href="qwidget.html#mouseMoveEvent">QWidget::mouseMoveEvent</a>().</p>
<!-- @@@mouseMoveEvent -->
<!-- $$$paintEvent[overload1]$$$paintEventQPaintEvent* -->
<h3 class="fn"><a name="paintEvent"></a><span class="type">void</span> QRadioButton::<span class="name">paintEvent</span> ( <span class="type"><a href="qpaintevent.html">QPaintEvent</a></span> * )<tt> [virtual protected]</tt></h3>
<p>Reimplemented from <a href="qwidget.html#paintEvent">QWidget::paintEvent</a>().</p>
<!-- @@@paintEvent -->
<!-- $$$sizeHint[overload1]$$$sizeHint -->
<h3 class="fn"><a name="sizeHint"></a><span class="type"><a href="qsize.html">QSize</a></span> QRadioButton::<span class="name">sizeHint</span> () const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="qwidget.html#sizeHint-prop">QWidget::sizeHint</a>().</p>
<!-- @@@sizeHint -->
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