<?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"> <!-- qtextobject.cpp --> <head> <title>Qt 4.6: QTextBlockUserData Class Reference</title> <link href="classic.css" rel="stylesheet" type="text/css" /> </head> <body> <a name="//apple_ref/cpp/cl//QTextBlockUserData"></a> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td align="left" valign="top" width="32"><a href="http://qt.nokia.com/"><img src="images/qt-logo.png" align="left" 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="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">QTextBlockUserData Class Reference<br /><span class="small-subtitle">[<a href="qtgui.html">QtGui</a> module]</span> </h1> <p>The QTextBlockUserData class is used to associate custom data with blocks of text. <a href="#details">More...</a></p> <pre> #include <QTextBlockUserData></pre><p><b>Note:</b> All functions in this class are <a href="threads-reentrancy.html#reentrant">reentrant</a>.</p> <p>This class was introduced in Qt 4.1.</p> <ul> <li><a href="qtextblockuserdata-members.html">List of all members, including inherited members</a></li> </ul> <hr /> <a name="public-functions"></a> <h2>Public Functions</h2> <table class="alignedsummary" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><b><a href="qtextblockuserdata.html#dtor.QTextBlockUserData">~QTextBlockUserData</a></b> ()</td></tr> </table> <a name="details"></a> <hr /> <h2>Detailed Description</h2> <p>The QTextBlockUserData class is used to associate custom data with blocks of text.</p> <p>QTextBlockUserData provides an abstract interface for container classes that are used to associate application-specific user data with text blocks in a <a href="qtextdocument.html">QTextDocument</a>.</p> <p>Generally, subclasses of this class provide functions to allow data to be stored and retrieved, and instances are attached to blocks of text using <a href="qtextblock.html#setUserData">QTextBlock::setUserData</a>(). This makes it possible to store additional data per text block in a way that can be retrieved safely by the application.</p> <p>Each subclass should provide a reimplementation of the destructor to ensure that any private data is automatically cleaned up when user data objects are deleted.</p> <p>See also <a href="qtextblock.html">QTextBlock</a>.</p> <hr /> <h2>Member Function Documentation</h2> <a name="//apple_ref/cpp/instm/QTextBlockUserData/~QTextBlockUserData"></a> <h3 class="fn"><a name="dtor.QTextBlockUserData"></a>QTextBlockUserData::~QTextBlockUserData () <tt> [virtual]</tt></h3> <p>Destroys the user data.</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> </tr></table></div></address></body> </html>