<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <!-- /tmp/qt-4.2.1-harald-1161357942206/qt-x11-opensource-src-4.2.1/src/gui/widgets/qvalidator.cpp --> <head> <title>Qt 4.2: QDoubleValidator Class Reference</title> <link href="classic.css" rel="stylesheet" type="text/css" /> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td align="left" valign="top" width="32"><a href="http://www.trolltech.com/products/qt"><img src="images/qt-logo.png" align="left" width="32" height="32" border="0" /></a></td> <td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> · <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a> · <a href="functions.html"><font color="#004faf">Functions</font></a></td> <td align="right" valign="top" width="230"><a href="http://www.trolltech.com"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></a></td></tr></table><h1 align="center">QDoubleValidator Class Reference<br /><sup><sup>[<a href="qtgui.html">QtGui</a> module]</sup></sup></h1> <p>The QDoubleValidator class provides range checking of floating-point numbers. <a href="#details">More...</a></p> <pre> #include <QDoubleValidator></pre><p>Inherits <a href="qvalidator.html">QValidator</a>.</p> <ul> <li><a href="qdoublevalidator-members.html">List of all members, including inherited members</a></li> <li><a href="qdoublevalidator-qt3.html">Qt 3 support members</a></li> </ul> <a name="properties"></a> <h3>Properties</h3> <ul> <li><div class="fn"/><b><a href="qdoublevalidator.html#bottom-prop">bottom</a></b> : double</li> <li><div class="fn"/><b><a href="qdoublevalidator.html#decimals-prop">decimals</a></b> : int</li> <li><div class="fn"/><b><a href="qdoublevalidator.html#top-prop">top</a></b> : double</li> </ul> <ul> <li><div class="fn"/>1 property inherited from <a href="qobject.html#properties">QObject</a></li> </ul> <a name="public-functions"></a> <h3>Public Functions</h3> <ul> <li><div class="fn"/><b><a href="qdoublevalidator.html#QDoubleValidator">QDoubleValidator</a></b> ( QObject * <i>parent</i> )</li> <li><div class="fn"/><b><a href="qdoublevalidator.html#QDoubleValidator-2">QDoubleValidator</a></b> ( double <i>bottom</i>, double <i>top</i>, int <i>decimals</i>, QObject * <i>parent</i> )</li> <li><div class="fn"/><b><a href="qdoublevalidator.html#dtor.QDoubleValidator">~QDoubleValidator</a></b> ()</li> <li><div class="fn"/>double <b><a href="qdoublevalidator.html#bottom-prop">bottom</a></b> () const</li> <li><div class="fn"/>int <b><a href="qdoublevalidator.html#decimals-prop">decimals</a></b> () const</li> <li><div class="fn"/>void <b><a href="qdoublevalidator.html#bottom-prop">setBottom</a></b> ( double )</li> <li><div class="fn"/>void <b><a href="qdoublevalidator.html#decimals-prop">setDecimals</a></b> ( int )</li> <li><div class="fn"/>virtual void <b><a href="qdoublevalidator.html#setRange">setRange</a></b> ( double <i>minimum</i>, double <i>maximum</i>, int <i>decimals</i> = 0 )</li> <li><div class="fn"/>void <b><a href="qdoublevalidator.html#top-prop">setTop</a></b> ( double )</li> <li><div class="fn"/>double <b><a href="qdoublevalidator.html#top-prop">top</a></b> () const</li> <li><div class="fn"/>virtual QValidator::State <b><a href="qdoublevalidator.html#validate">validate</a></b> ( QString & <i>input</i>, int & <i>pos</i> ) const</li> </ul> <ul> <li><div class="fn"/>2 public functions inherited from <a href="qvalidator.html#public-functions">QValidator</a></li> <li><div class="fn"/>29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li> </ul> <h3>Additional Inherited Members</h3> <ul> <li><div class="fn"/>1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li> <li><div class="fn"/>1 signal inherited from <a href="qobject.html#signals">QObject</a></li> <li><div class="fn"/>5 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li> <li><div class="fn"/>7 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li> </ul> <a name="details"></a> <hr /> <h2>Detailed Description</h2> <p>The QDoubleValidator class provides range checking of floating-point numbers.</p> <p>QDoubleValidator provides an upper bound, a lower bound, and a limit on the number of digits after the decimal point. It does not provide a <a href="qvalidator.html#fixup">fixup</a>() function.</p> <p>You can set the acceptable range in one call with <a href="qdoublevalidator.html#setRange">setRange</a>(), or with <a href="qdoublevalidator.html#bottom-prop">setBottom</a>() and <a href="qdoublevalidator.html#top-prop">setTop</a>(). Set the number of decimal places with <a href="qdoublevalidator.html#decimals-prop">setDecimals</a>(). The <a href="qdoublevalidator.html#validate">validate</a>() function returns the validation state.</p> <p>See also <a href="qintvalidator.html">QIntValidator</a>, <a href="qregexpvalidator.html">QRegExpValidator</a>, and <a href="widgets-lineedits.html">Line Edits Example</a>.</p> <hr /> <h2>Property Documentation</h2> <h3 class="fn"><a name="bottom-prop"></a>bottom : double</h3> <p>This property holds the validator's minimum acceptable value.</p> <p>Access functions:</p> <ul> <li><div class="fn"/><b>double bottom () const</b></li> <li><div class="fn"/><b>void setBottom ( double )</b></li> </ul> <p>See also <a href="qdoublevalidator.html#setRange">setRange</a>().</p> <h3 class="fn"><a name="decimals-prop"></a>decimals : int</h3> <p>This property holds the validator's maximum number of digits after the decimal point.</p> <p>Access functions:</p> <ul> <li><div class="fn"/><b>int decimals () const</b></li> <li><div class="fn"/><b>void setDecimals ( int )</b></li> </ul> <p>See also <a href="qdoublevalidator.html#setRange">setRange</a>().</p> <h3 class="fn"><a name="top-prop"></a>top : double</h3> <p>This property holds the validator's maximum acceptable value.</p> <p>Access functions:</p> <ul> <li><div class="fn"/><b>double top () const</b></li> <li><div class="fn"/><b>void setTop ( double )</b></li> </ul> <p>See also <a href="qdoublevalidator.html#setRange">setRange</a>().</p> <hr /> <h2>Member Function Documentation</h2> <h3 class="fn"><a name="QDoubleValidator"></a>QDoubleValidator::QDoubleValidator ( <a href="qobject.html">QObject</a> * <i>parent</i> )</h3> <p>Constructs a validator object with a <i>parent</i> object that accepts any double.</p> <h3 class="fn"><a name="QDoubleValidator-2"></a>QDoubleValidator::QDoubleValidator ( double <i>bottom</i>, double <i>top</i>, int <i>decimals</i>, <a href="qobject.html">QObject</a> * <i>parent</i> )</h3> <p>Constructs a validator object with a <i>parent</i> object. This validator will accept doubles from <i>bottom</i> to <i>top</i> inclusive, with up to <i>decimals</i> digits after the decimal point.</p> <h3 class="fn"><a name="dtor.QDoubleValidator"></a>QDoubleValidator::~QDoubleValidator ()</h3> <p>Destroys the validator.</p> <h3 class="fn"><a name="setRange"></a>void QDoubleValidator::setRange ( double <i>minimum</i>, double <i>maximum</i>, int <i>decimals</i> = 0 ) <tt> [virtual]</tt></h3> <p>Sets the validator to accept doubles from <i>minimum</i> to <i>maximum</i> inclusive, with at most <i>decimals</i> digits after the decimal point.</p> <h3 class="fn"><a name="validate"></a><a href="qvalidator.html#State-enum">QValidator::State</a> QDoubleValidator::validate ( <a href="qstring.html">QString</a> & <i>input</i>, int & <i>pos</i> ) const <tt> [virtual]</tt></h3> <p>Returns <a href="qvalidator.html#State-enum">Acceptable</a> if the string <i>input</i> contains a double that is within the valid range and is in the correct format.</p> <p>Returns <a href="qvalidator.html#State-enum">Intermediate</a> if <i>input</i> contains a double that is outside the range or is in the wrong format; e.g. with too many digits after the decimal point or is empty.</p> <p>Returns <a href="qvalidator.html#State-enum">Invalid</a> if the <i>input</i> is not a double.</p> <p>Note: If the valid range consists of just positive doubles (e.g. 0.0 to 100.0) and <i>input</i> is a negative double then <a href="qvalidator.html#State-enum">Invalid</a> is returned.</p> <p>By default, the <i>pos</i> parameter is not used by this validator.</p> <p>Reimplemented from <a href="qvalidator.html#validate">QValidator</a>.</p> <hr /> <h2>Member Function Documentation</h2> <h3 class="fn"><a name="QDoubleValidator-3"></a>QDoubleValidator::QDoubleValidator ( <a href="qobject.html">QObject</a> * <i>parent</i>, const char * <i>name</i> )</h3> <p>Constructs a validator object with a <i>parent</i> object and a <i>name</i> that accepts any double.</p> <h3 class="fn"><a name="QDoubleValidator-4"></a>QDoubleValidator::QDoubleValidator ( double <i>bottom</i>, double <i>top</i>, int <i>decimals</i>, <a href="qobject.html">QObject</a> * <i>parent</i>, const char * <i>name</i> )</h3> <p>Constructs a validator object with a <i>parent</i> object, called <i>name</i>. This validator will accept doubles from <i>bottom</i> to <i>top</i> inclusive, with up to <i>decimals</i> digits after the decimal point.</p> <p /><address><hr /><div align="center"> <table width="100%" cellspacing="0" border="0"><tr class="address"> <td width="30%">Copyright © 2006 <a href="trolltech.html">Trolltech</a></td> <td width="40%" align="center"><a href="trademarks.html">Trademarks</a></td> <td width="30%" align="right"><div align="right">Qt 4.2.1</div></td> </tr></table></div></address></body> </html>