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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/src/kernel/qnetworkprotocol.cpp:969 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>QNetworkOperation Class</title><style type="text/css"><!--h3.fn,span.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>QNetworkOperation Class Reference</h1><p>The QNetworkOperation class provides common operations for network protocols.<a href="#details">More...</a><p><tt>#include <<a href="qnetworkprotocol-h.html">qnetworkprotocol.h</a>></tt><p>Inherits <a href="qobject.html">QObject</a>.<p><a href="qnetworkoperation-members.html">List of all member functions.</a><h2>Public Members</h2><ul><li><div class=fn><a href="#QNetworkOperation"><b>QNetworkOperation</b></a> ( QNetworkProtocol::Operation operation, const QString & arg0, const QString & arg1, const QString & arg2 )</div></li><li><div class=fn><a href="#QNetworkOperation-2"><b>QNetworkOperation</b></a> ( QNetworkProtocol::Operation operation, const QByteArray & arg0, const QByteArray & arg1, const QByteArray & arg2 )</div></li><li><div class=fn><a href="#~QNetworkOperation"><b>~QNetworkOperation</b></a> ()</div></li><li><div class=fn>void <a href="#setState"><b>setState</b></a> ( QNetworkProtocol::State state )</div></li><li><div class=fn>void <a href="#setProtocolDetail"><b>setProtocolDetail</b></a> ( const QString & detail )</div></li><li><div class=fn>void <a href="#setErrorCode"><b>setErrorCode</b></a> ( int ec )</div></li><li><div class=fn>void <a href="#setArg"><b>setArg</b></a> ( int num, const QString & arg )</div></li><li><div class=fn>void <a href="#setRawArg"><b>setRawArg</b></a> ( int num, const QByteArray & arg )</div></li><li><div class=fn>QNetworkProtocol::Operation <a href="#operation"><b>operation</b></a> () const</div></li><li><div class=fn>QNetworkProtocol::State <a href="#state"><b>state</b></a> () const</div></li><li><div class=fn>QString <a href="#arg"><b>arg</b></a> ( int num ) const</div></li><li><div class=fn>QByteArray <a href="#rawArg"><b>rawArg</b></a> ( int num ) const</div></li><li><div class=fn>QString <a href="#protocolDetail"><b>protocolDetail</b></a> () const</div></li><li><div class=fn>int <a href="#errorCode"><b>errorCode</b></a> () const</div></li><li><div class=fn>void <a href="#free"><b>free</b></a> ()</div></li></ul><hr><a name="details"></a><h2>Detailed Description</h2><p> The QNetworkOperation class provides common operations for network protocols.<p> <p> An object is created to describe the operation and the currentstate for each operation that a network protocol should process.<p> For a detailed description of the Qt Network Architecture and howto implement and use network protocols in Qt, see the <a href="network.html">Qt Network Documentation</a>.<p> <p>See also <a href="qnetworkprotocol.html">QNetworkProtocol</a> and <a href="io.html">Input/Output and Networking</a>.<hr><h2>Member Function Documentation</h2><h3 class=fn><a name="QNetworkOperation"></a>QNetworkOperation::QNetworkOperation ( <a href="qnetworkprotocol.html#Operation-enum">QNetworkProtocol::Operation</a> operation, const <a href="qstring.html">QString</a> & arg0, const <a href="qstring.html">QString</a> & arg1, const <a href="qstring.html">QString</a> & arg2 )</h3>Constructs a network operation object. <em>operation</em> is the type ofthe operation, and <em>arg0</em>, <em>arg1</em> and <em>arg2</em> are the firstthree arguments of the operation. The state is initialized toQNetworkProtocol::StWaiting.<p> <p>See also <a href="qnetworkprotocol.html#Operation-enum">QNetworkProtocol::Operation</a> and <a href="qnetworkprotocol.html#State-enum">QNetworkProtocol::State</a>.<h3 class=fn><a name="QNetworkOperation-2"></a>QNetworkOperation::QNetworkOperation ( <a href="qnetworkprotocol.html#Operation-enum">QNetworkProtocol::Operation</a> operation, const <a href="qbytearray.html">QByteArray</a> & arg0, const <a href="qbytearray.html">QByteArray</a> & arg1, const <a href="qbytearray.html">QByteArray</a> & arg2 )</h3>Constructs a network operation object. <em>operation</em> is the type ofthe operation, and <em>arg0</em>, <em>arg1</em> and <em>arg2</em> are the firstthree raw data arguments of the operation. The state isinitialized to QNetworkProtocol::StWaiting.<p> <p>See also <a href="qnetworkprotocol.html#Operation-enum">QNetworkProtocol::Operation</a> and <a href="qnetworkprotocol.html#State-enum">QNetworkProtocol::State</a>.<h3 class=fn><a name="~QNetworkOperation"></a>QNetworkOperation::~QNetworkOperation ()</h3>Destructor.<h3 class=fn><a href="qstring.html">QString</a> <a name="arg"></a>QNetworkOperation::arg ( int num ) const</h3>Returns the operation's <em>num</em>-th argument. If this argument wasnot already set, an empty string is returned.<p>Examples: <a href="ftpclient-example.html#x665">network/ftpclient/ftpmainwindow.cpp</a> and <a href="networkprotocol-example.html#x601">network/networkprotocol/nntp.cpp</a>.<h3 class=fn>int <a name="errorCode"></a>QNetworkOperation::errorCode () const</h3>Returns the error code for the last error that occurred.<p>Example: <a href="ftpclient-example.html#x666">network/ftpclient/ftpmainwindow.cpp</a>.<h3 class=fn>void <a name="free"></a>QNetworkOperation::free ()</h3>Sets this object to delete itself when it hasn't been used for onesecond.<p> Because QNetworkOperation pointers are passed around a lot the<a href="qnetworkprotocol.html">QNetworkProtocol</a> generally does not have enough knowledge todelete these at the correct time. If a QNetworkProtocol doesn'tneed an operation any more it will call this function instead.<p> Note: you should never need to call the method yourself.<h3 class=fn><a href="qnetworkprotocol.html#Operation-enum">QNetworkProtocol::Operation</a> <a name="operation"></a>QNetworkOperation::operation () const</h3>Returns the type of the operation.<p>Example: <a href="ftpclient-example.html#x667">network/ftpclient/ftpmainwindow.cpp</a>.<h3 class=fn><a href="qstring.html">QString</a> <a name="protocolDetail"></a>QNetworkOperation::protocolDetail () const</h3>Returns a detailed error message for the last error. This musthave been set using <a href="#setProtocolDetail">setProtocolDetail</a>().<p>Example: <a href="ftpclient-example.html#x668">network/ftpclient/ftpmainwindow.cpp</a>.<h3 class=fn><a href="qbytearray.html">QByteArray</a> <a name="rawArg"></a>QNetworkOperation::rawArg ( int num ) const</h3>Returns the operation's <em>num</em>-th raw data argument. If thisargument was not already set, an empty bytearray is returned.<h3 class=fn>void <a name="setArg"></a>QNetworkOperation::setArg ( int num, const <a href="qstring.html">QString</a> & arg )</h3>Sets the network operation's <em>num</em>-th argument to <em>arg</em>.<h3 class=fn>void <a name="setErrorCode"></a>QNetworkOperation::setErrorCode ( int ec )</h3>Sets the error code to <em>ec</em>.<p> If the operation failed, the protocol should set an error code todescribe the error in more detail. If possible, one of the errorcodes defined in <a href="qnetworkprotocol.html">QNetworkProtocol</a> should be used.<p> <p>See also <a href="#setProtocolDetail">setProtocolDetail</a>() and <a href="qnetworkprotocol.html#Error-enum">QNetworkProtocol::Error</a>.<h3 class=fn>void <a name="setProtocolDetail"></a>QNetworkOperation::setProtocolDetail ( const <a href="qstring.html">QString</a> & detail )</h3>If the operation failed, the error message can be specified as <em>detail</em>.<h3 class=fn>void <a name="setRawArg"></a>QNetworkOperation::setRawArg ( int num, const <a href="qbytearray.html">QByteArray</a> & arg )</h3>Sets the network operation's <em>num</em>-th raw data argument to <em>arg</em>.<h3 class=fn>void <a name="setState"></a>QNetworkOperation::setState ( <a href="qnetworkprotocol.html#State-enum">QNetworkProtocol::State</a> state )</h3>Sets the <em>state</em> of the operation object. This should be done bythe network protocol during processing; at the end it should beset to QNetworkProtocol::StDone or QNetworkProtocol::StFailed,depending on success or failure.<p> <p>See also <a href="qnetworkprotocol.html#State-enum">QNetworkProtocol::State</a>.<h3 class=fn><a href="qnetworkprotocol.html#State-enum">QNetworkProtocol::State</a> <a name="state"></a>QNetworkOperation::state () const</h3>Returns the state of the operation. You can determine whether anoperation is still waiting to be processed, is being processed,has been processed successfully, or failed.<p>Example: <a href="ftpclient-example.html#x669">network/ftpclient/ftpmainwindow.cpp</a>.<!-- eof --><hr><p>This file is part of the <a href="index.html">Qt toolkit</a>.Copyright © 1995-2002<a href="http://www.trolltech.com/">Trolltech</a>. 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