<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qasyncio.cpp:208 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>QIODeviceSource Class</title> <style type="text/css"><!-- fn { margin-left: 1cm; text-indent: -1cm; } a:link { color: #004faf; text-decoration: none } a:visited { color: #672967; text-decoration: none } body { background: #ffffff; color: black; } --></style> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr bgcolor="#E5E5E5"> <td 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="annotated.html"> <font color="#004faf">Annotated</font></a> | <a href="groups.html"> <font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"> <font color="#004faf">Functions</font></a> </td> <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QIODeviceSource Class Reference<br><small>[obsolete]</small></h1> <p>The QIODeviceSource class is a QDataSource that draws data from a QIODevice. <a href="#details">More...</a> <p><tt>#include <<a href="qasyncio-h.html">qasyncio.h</a>></tt> <p>Inherits <a href="qdatasource.html">QDataSource</a>. <p><a href="qiodevicesource-members.html">List of all member functions.</a> <h2>Public Members</h2> <ul> <li class=fn><a href="#QIODeviceSource"><b>QIODeviceSource</b></a> ( QIODevice * device, int buffer_size = 4096 )</li> <li class=fn><a href="#~QIODeviceSource"><b>~QIODeviceSource</b></a> ()</li> <li class=fn>virtual int <a href="#readyToSend"><b>readyToSend</b></a> ()</li> <li class=fn>virtual void <a href="#sendTo"><b>sendTo</b></a> ( QDataSink * sink, int n )</li> <li class=fn>virtual bool <a href="#rewindable"><b>rewindable</b></a> () const</li> <li class=fn>virtual void <a href="#enableRewind"><b>enableRewind</b></a> ( bool on )</li> <li class=fn>virtual void <a href="#rewind"><b>rewind</b></a> ()</li> </ul> <hr><a name="details"></a><h2>Detailed Description</h2> <b>This class is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code. <p> The QIODeviceSource class is a QDataSource that draws data from a <a href="qiodevice.html">QIODevice</a>. <p> This class encapsulates retrieving data from a QIODevice (such as a <a href="qfile.html">QFile</a>). <hr><h2>Member Function Documentation</h2> <h3 class=fn><a name="QIODeviceSource"></a>QIODeviceSource::QIODeviceSource ( <a href="qiodevice.html">QIODevice</a> * device, int buffer_size = 4096 ) </h3> Constructs a QIODeviceSource from the <a href="qiodevice.html">QIODevice</a> <em>device</em>. The QIODevice <em>must</em> be dynamically allocated, becomes owned by the QIODeviceSource, and will be deleted when the QIODeviceSource is destroyed. <em>buffer_size</em> determines the size of buffering to use between asynchronous operations. The higher the <em>buffer_size</em>, the more efficient, but the less interleaved the operation will be with other processing. <h3 class=fn><a name="~QIODeviceSource"></a>QIODeviceSource::~QIODeviceSource () </h3> Destroys the QIODeviceSource, deleting the <a href="qiodevice.html">QIODevice</a> from which it was constructed. <h3 class=fn>void <a name="enableRewind"></a>QIODeviceSource::enableRewind ( bool on )<tt> [virtual]</tt> </h3> If <em>on</em> is set to TRUE then rewinding is enabled. No special action is taken. If <em>on</em> is set to FALSE then rewinding is disabled. <p>Reimplemented from <a href="qdatasource.html#enableRewind">QDataSource</a>. <h3 class=fn>int <a name="readyToSend"></a>QIODeviceSource::readyToSend ()<tt> [virtual]</tt> </h3> Ready until end-of-file. <p>Reimplemented from <a href="qdatasource.html#readyToSend">QDataSource</a>. <h3 class=fn>void <a name="rewind"></a>QIODeviceSource::rewind ()<tt> [virtual]</tt> </h3> Calls reset() on the <a href="qiodevice.html">QIODevice</a>. <p>Reimplemented from <a href="qdatasource.html#rewind">QDataSource</a>. <h3 class=fn>bool <a name="rewindable"></a>QIODeviceSource::rewindable () const<tt> [virtual]</tt> </h3> All QIODeviceSource's are rewindable. <p>Reimplemented from <a href="qdatasource.html#rewindable">QDataSource</a>. <h3 class=fn>void <a name="sendTo"></a>QIODeviceSource::sendTo ( <a href="qdatasink.html">QDataSink</a> * sink, int n )<tt> [virtual]</tt> </h3> Reads a block of data and sends up to <em>n</em> bytes to the <em>sink</em>. <p>Reimplemented from <a href="qdatasource.html#sendTo">QDataSource</a>. <!-- eof --> <hr><p> This file is part of the <a href="index.html">Qt toolkit</a>. 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