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</style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr /><td align="left" valign="top" width="32"><img align="left" border="0" height="32" src="images/rb-logo.png" width="32" /></td><td width="1">  </td><td class="postheader" valign="center"><a href="../pyqt4ref.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a></td></table><h1 align="center">QRadioButton Class Reference<br /><sup><sup>[<a href="qtgui.html">QtGui</a> module]</sup></sup></h1><p>The QRadioButton widget provides a radio button with a text label. <a href="#details">More...</a></p>
<p>Inherits <a href="qabstractbutton.html">QAbstractButton</a>.</p><h3>Methods</h3><ul><li><div class="fn" /><b><a href="qradiobutton.html#QRadioButton">__init__</a></b> (<i>self</i>, QWidget <i>parent</i> = None)</li><li><div class="fn" /><b><a href="qradiobutton.html#QRadioButton-2">__init__</a></b> (<i>self</i>, QString, QWidget <i>parent</i> = None)</li><li><div class="fn" />bool <b><a href="qradiobutton.html#event">event</a></b> (<i>self</i>, QEvent)</li><li><div class="fn" />bool <b><a href="qradiobutton.html#hitButton">hitButton</a></b> (<i>self</i>, QPoint)</li><li><div class="fn" /><b><a href="qradiobutton.html#initStyleOption">initStyleOption</a></b> (<i>self</i>, QStyleOptionButton)</li><li><div class="fn" /><b><a href="qradiobutton.html#mouseMoveEvent">mouseMoveEvent</a></b> (<i>self</i>, QMouseEvent)</li><li><div class="fn" /><b><a href="qradiobutton.html#paintEvent">paintEvent</a></b> (<i>self</i>, QPaintEvent)</li><li><div class="fn" />QSize <b><a href="qradiobutton.html#sizeHint">sizeHint</a></b> (<i>self</i>)</li></ul><a name="details" /><hr /><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> QRadioButton *button = new QRadioButton("Search from the &cursor", this);</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>
<p><table align="center" border="0" cellpadding="2" cellspacing="1" class="generic" width="100%">
<tr class="odd" valign="top"><td><img alt="Screenshot of a Plastique radio button" src="images/plastique-radiobutton.png" /></td><td>A radio button shown in the <a href="gallery-plastique.html">Plastique widget style</a>.</td></tr>
<tr class="even" valign="top"><td><img alt="Screenshot of a Windows XP radio button" src="images/windows-radiobutton.png" /></td><td>A radio button shown in the <a href="gallery-windowsxp.html">Windows XP widget style</a>.</td></tr>
<tr class="odd" valign="top"><td><img alt="Screenshot of a Macintosh radio button" src="images/macintosh-radiobutton.png" /></td><td>A radio button shown in the <a href="gallery-macintosh.html">Macintosh widget style</a>.</td></tr>
</table></p>
<p>See also <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>
<hr /><h2>Method Documentation</h2><h3 class="fn"><a name="QRadioButton" />QRadioButton.__init__ (<i>self</i>, <a href="qwidget.html">QWidget</a> <i>parent</i> = None)</h3><p>The <i>parent</i> argument, if not None, causes <i>self</i> to be owned by Qt instead of PyQt.</p><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>
<h3 class="fn"><a name="QRadioButton-2" />QRadioButton.__init__ (<i>self</i>, QString, <a href="qwidget.html">QWidget</a> <i>parent</i> = None)</h3><p>The <i>parent</i> argument, if not None, causes <i>self</i> to be owned by Qt instead of PyQt.</p><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>
<a name="//apple_ref/cpp/instm/QRadioButton/event" />
<h3 class="fn"><a name="event" />bool QRadioButton.event (<i>self</i>, <a href="qevent.html">QEvent</a>)</h3><p>Reimplemented from <a href="qobject.html#event">QObject.event</a>().</p>
<a name="//apple_ref/cpp/instm/QRadioButton/hitButton" />
<h3 class="fn"><a name="hitButton" />bool QRadioButton.hitButton (<i>self</i>, <a href="qpoint.html">QPoint</a>)</h3><p>Reimplemented from <a href="qabstractbutton.html#hitButton">QAbstractButton.hitButton</a>().</p>
<a name="//apple_ref/cpp/instm/QRadioButton/initStyleOption" />
<h3 class="fn"><a name="initStyleOption" />QRadioButton.initStyleOption (<i>self</i>, <a href="qstyleoptionbutton.html">QStyleOptionButton</a>)</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>See also <a href="qstyleoption.html#initFrom">QStyleOption.initFrom</a>().</p>
<a name="//apple_ref/cpp/instm/QRadioButton/mouseMoveEvent" />
<h3 class="fn"><a name="mouseMoveEvent" />QRadioButton.mouseMoveEvent (<i>self</i>, <a href="qmouseevent.html">QMouseEvent</a>)</h3><p>Reimplemented from <a href="qwidget.html#mouseMoveEvent">QWidget.mouseMoveEvent</a>().</p>
<a name="//apple_ref/cpp/instm/QRadioButton/paintEvent" />
<h3 class="fn"><a name="paintEvent" />QRadioButton.paintEvent (<i>self</i>, <a href="qpaintevent.html">QPaintEvent</a>)</h3><p>Reimplemented from <a href="qwidget.html#paintEvent">QWidget.paintEvent</a>().</p>
<a name="//apple_ref/cpp/instm/QRadioButton/sizeHint" />
<h3 class="fn"><a name="sizeHint" /><a href="qsize.html">QSize</a> QRadioButton.sizeHint (<i>self</i>)</h3><p>Reimplemented from <a href="qwidget.html#sizeHint-prop">QWidget.sizeHint</a>().</p>
<p /><address><hr /><div align="center"><table border="0" cellspacing="0" width="100%"><tr class="address"><td align="left" width="25%">PyQt 4.7.4 for X11</td><td align="center" width="50%">Copyright © <a href="http://www.riverbankcomputing.com">Riverbank Computing Ltd</a> and <a href="http://www.qtsoftware.com">Nokia</a> 2010</td><td align="right" width="25%">Qt 4.6.3</td></tr></table></div></address></body></html>
