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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta name="robots" content="noindex,noarchive">
<title>Qt Toolkit - QIODeviceSource Class</title><style type="text/css"><!--
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<h1 align=center>QIODeviceSource Class Reference</h1><br clear="all">
<p>
A QIODeviceSource is a <a href="qdatasource.html">QDataSource</a> that draws data from a <a href="qiodevice.html">QIODevice</a>
<a href="#details">More...</a>
<p>
<code>#include <<a href="qasyncio-h.html">qasyncio.h</a>></code>
<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><span class="fn"><a href="qiodevicesource.html#a0"><strong>QIODeviceSource</strong></a>(QIODevice*, intbufsize=4096)</span>
<li><span class="fn"><a href="qiodevicesource.html#a1"><strong>~QIODeviceSource</strong></a>()</span>
<li><span class="fn">virtualint<a href="qiodevicesource.html#a2"><strong>readyToSend</strong></a>()</span>
<li><span class="fn">virtualvoid<a href="qiodevicesource.html#a3"><strong>sendTo</strong></a>(QDataSink*sink, intn)</span>
<li><span class="fn">virtualbool<a href="qiodevicesource.html#a4"><strong>rewindable</strong></a>()const</span>
<li><span class="fn">virtualvoid<a href="qiodevicesource.html#a5"><strong>enableRewind</strong></a>(boolon)</span>
<li><span class="fn">virtualvoid<a href="qdatasource.html#a5"><strong>rewind</strong></a>()</span>
</ul>
<hr><h2><a name="details"></a>Detailed Description</h2>
A QIODeviceSource is a <a href="qdatasource.html">QDataSource</a> 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="a0"></a>QIODeviceSource::QIODeviceSource(<a href="qiodevice.html">QIODevice</a>*device, intbuffer_size=4096)</h3>
<p>Constructs a QIODeviceSource from a pointer to an <a href="qiodevice.html">QIODevice</a>. The QIODevice
<em>must</em> be dynamically allocated, becomes owned by the QIODeviceSource,
and will be deleted when the QIODeviceSource destructs. <em>buffer_size</em>
determines the size of buffering to use between asynchronous operations.
The higher <em>buffer_size,</em> the more efficient but the less interleaved
the operation will be with other processing.
<h3 class="fn"><a name="a1"></a>QIODeviceSource::~QIODeviceSource()</h3>
<p>Destroys the QIODeviceSource, deleting the <a href="qiodevice.html">QIODevice</a> from which it was
constructed.
<h3 class="fn">void<a name="a5"></a>QIODeviceSource::enableRewind(boolon) <code>[virtual]</code></h3>
<p>Enables rewinding. No special action is taken.
<p>Reimplemented from <a href="qdatasource.html#a4">QDataSource.</a>
<h3 class="fn">int<a name="a2"></a>QIODeviceSource::readyToSend() <code>[virtual]</code></h3>
<p>Ready until end-of-file.
<p>Reimplemented from <a href="qdatasource.html#a0">QDataSource.</a>
<h3 class="fn">bool<a name="a4"></a>QIODeviceSource::rewindable()const <code>[virtual]</code></h3>
<p>All QIODeviceSource's are rewindable.
<p>Reimplemented from <a href="qdatasource.html#a3">QDataSource.</a>
<h3 class="fn">void<a name="a3"></a>QIODeviceSource::sendTo(<a href="qdatasink.html">QDataSink</a>*sink, intn) <code>[virtual]</code></h3>
<p>Reads and sends a block of data.
<p>Reimplemented from <a href="qdatasource.html#a1">QDataSource.</a>
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<li>qasyncio.h: 1998/08/19
<li>qasyncio.cpp: 1998/08/12
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