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109 lines
5.3 KiB
109 lines
5.3 KiB
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<title>TQIODeviceSource Class</title>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQIODeviceSource Class Reference<br><small>[obsolete]</small></h1>
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<p>The TQIODeviceSource class is a TQDataSource that draws data from a TQIODevice.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qasyncio-h.html">ntqasyncio.h</a>></tt>
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<p>Inherits <a href="qdatasource.html">TQDataSource</a>.
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<p><a href="qiodevicesource-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#TQIODeviceSource"><b>TQIODeviceSource</b></a> ( TQIODevice * device, int buffer_size = 4096 )</li>
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<li class=fn><a href="#~TQIODeviceSource"><b>~TQIODeviceSource</b></a> ()</li>
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<li class=fn>virtual int <a href="#readyToSend"><b>readyToSend</b></a> ()</li>
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<li class=fn>virtual void <a href="#sendTo"><b>sendTo</b></a> ( TQDataSink * sink, int n )</li>
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<li class=fn>virtual bool <a href="#rewindable"><b>rewindable</b></a> () const</li>
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<li class=fn>virtual void <a href="#enableRewind"><b>enableRewind</b></a> ( bool on )</li>
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<li class=fn>virtual void <a href="#rewind"><b>rewind</b></a> ()</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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<b>This class is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p> The TQIODeviceSource class is a TQDataSource that draws data from a <a href="ntqiodevice.html">TQIODevice</a>.
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<p> This class encapsulates retrieving data from a TQIODevice (such as a <a href="ntqfile.html">TQFile</a>).
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQIODeviceSource"></a>TQIODeviceSource::TQIODeviceSource ( <a href="ntqiodevice.html">TQIODevice</a> * device, int buffer_size = 4096 )
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</h3>
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Constructs a TQIODeviceSource from the <a href="ntqiodevice.html">TQIODevice</a> <em>device</em>. The TQIODevice
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<em>must</em> be dynamically allocated, becomes owned by the TQIODeviceSource,
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and will be deleted when the TQIODeviceSource is destroyed. <em>buffer_size</em>
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determines the size of buffering to use between asynchronous operations.
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The higher the <em>buffer_size</em>, the more efficient, but the less interleaved
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the operation will be with other processing.
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<h3 class=fn><a name="~TQIODeviceSource"></a>TQIODeviceSource::~TQIODeviceSource ()
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</h3>
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Destroys the TQIODeviceSource, deleting the <a href="ntqiodevice.html">TQIODevice</a> from which it was
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constructed.
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<h3 class=fn>void <a name="enableRewind"></a>TQIODeviceSource::enableRewind ( bool on )<tt> [virtual]</tt>
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</h3>
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If <em>on</em> is set to TRUE then rewinding is enabled.
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No special action is taken. If <em>on</em> is set to
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FALSE then rewinding is disabled.
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<p>Reimplemented from <a href="qdatasource.html#enableRewind">TQDataSource</a>.
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<h3 class=fn>int <a name="readyToSend"></a>TQIODeviceSource::readyToSend ()<tt> [virtual]</tt>
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</h3>
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Ready until end-of-file.
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<p>Reimplemented from <a href="qdatasource.html#readyToSend">TQDataSource</a>.
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<h3 class=fn>void <a name="rewind"></a>TQIODeviceSource::rewind ()<tt> [virtual]</tt>
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</h3>
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Calls reset() on the <a href="ntqiodevice.html">TQIODevice</a>.
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<p>Reimplemented from <a href="qdatasource.html#rewind">TQDataSource</a>.
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<h3 class=fn>bool <a name="rewindable"></a>TQIODeviceSource::rewindable () const<tt> [virtual]</tt>
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</h3>
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All TQIODeviceSource's are rewindable.
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<p>Reimplemented from <a href="qdatasource.html#rewindable">TQDataSource</a>.
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<h3 class=fn>void <a name="sendTo"></a>TQIODeviceSource::sendTo ( <a href="qdatasink.html">TQDataSink</a> * sink, int n )<tt> [virtual]</tt>
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</h3>
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Reads a block of data and sends up to <em>n</em> bytes to the <em>sink</em>.
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<p>Reimplemented from <a href="qdatasource.html#sendTo">TQDataSource</a>.
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