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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">dialog.cpp Example File</h1> <span class="small-subtitle">network/loopback/dialog.cpp</span> <!-- $$$network/loopback/dialog.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** You may use this file under the terms of the BSD license as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include <QtGui></span> <span class="preprocessor">#include <QtNetwork></span> <span class="preprocessor">#include "dialog.h"</span> <span class="preprocessor">#if !defined(Q_OS_WINCE) && !defined(Q_OS_SYMBIAN)</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="type">int</span> TotalBytes <span class="operator">=</span> <span class="number">50</span> <span class="operator">*</span> <span class="number">1024</span> <span class="operator">*</span> <span class="number">1024</span>; <span class="preprocessor">#else</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="type">int</span> TotalBytes <span class="operator">=</span> <span class="number">5</span> <span class="operator">*</span> <span class="number">1024</span> <span class="operator">*</span> <span class="number">1024</span>; <span class="preprocessor">#endif</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="type">int</span> PayloadSize <span class="operator">=</span> <span class="number">64</span> <span class="operator">*</span> <span class="number">1024</span>; <span class="comment">// 64 KB</span> Dialog<span class="operator">::</span>Dialog(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qdialog.html">QDialog</a></span>(parent) { clientProgressBar <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qprogressbar.html">QProgressBar</a></span>; clientStatusLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"Client ready"</span>)); serverProgressBar <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qprogressbar.html">QProgressBar</a></span>; serverStatusLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"Server ready"</span>)); <span class="preprocessor">#ifdef Q_OS_SYMBIAN</span> <span class="type"><a href="qmenu.html">QMenu</a></span> <span class="operator">*</span>menu <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qmenu.html">QMenu</a></span>(<span class="keyword">this</span>); <span class="type"><a href="qaction.html">QAction</a></span> <span class="operator">*</span>optionsAction <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"Options"</span>)<span class="operator">,</span> <span class="keyword">this</span>); optionsAction<span class="operator">-</span><span class="operator">></span>setSoftKeyRole(<span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>PositiveSoftKey); optionsAction<span class="operator">-</span><span class="operator">></span>setMenu(menu); addAction(optionsAction); startAction <span class="operator">=</span> menu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Start"</span>)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(start())); quitAction <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qaction.html">QAction</a></span>(tr(<span class="string">"Exit"</span>)<span class="operator">,</span> <span class="keyword">this</span>); quitAction<span class="operator">-</span><span class="operator">></span>setSoftKeyRole(<span class="type"><a href="qaction.html">QAction</a></span><span class="operator">::</span>NegativeSoftKey); addAction(quitAction); connect(quitAction<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(close())); <span class="preprocessor">#else</span> startButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"&Start"</span>)); quitButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"&Quit"</span>)); buttonBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span>; buttonBox<span class="operator">-</span><span class="operator">></span>addButton(startButton<span class="operator">,</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>ActionRole); buttonBox<span class="operator">-</span><span class="operator">></span>addButton(quitButton<span class="operator">,</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span><span class="operator">::</span>RejectRole); connect(startButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(start())); connect(quitButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(close())); <span class="preprocessor">#endif</span> connect(<span class="operator">&</span>tcpServer<span class="operator">,</span> SIGNAL(newConnection())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(acceptConnection())); connect(<span class="operator">&</span>tcpClient<span class="operator">,</span> SIGNAL(connected())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(startTransfer())); connect(<span class="operator">&</span>tcpClient<span class="operator">,</span> SIGNAL(bytesWritten(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(updateClientProgress(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>))); connect(<span class="operator">&</span>tcpClient<span class="operator">,</span> SIGNAL(error(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketError))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(displayError(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketError))); <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>; mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(clientProgressBar); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(clientStatusLabel); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(serverProgressBar); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(serverStatusLabel); mainLayout<span class="operator">-</span><span class="operator">></span>addStretch(<span class="number">1</span>); mainLayout<span class="operator">-</span><span class="operator">></span>addSpacing(<span class="number">10</span>); <span class="preprocessor">#ifndef Q_OS_SYMBIAN</span> mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(buttonBox); <span class="preprocessor">#endif</span> setLayout(mainLayout); setWindowTitle(tr(<span class="string">"Loopback"</span>)); } <span class="type">void</span> Dialog<span class="operator">::</span>start() { <span class="preprocessor">#ifdef Q_OS_SYMBIAN</span> startAction<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">false</span>); <span class="preprocessor">#else</span> startButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); <span class="preprocessor">#endif</span> <span class="preprocessor">#ifndef QT_NO_CURSOR</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>setOverrideCursor(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>WaitCursor); <span class="preprocessor">#endif</span> bytesWritten <span class="operator">=</span> <span class="number">0</span>; bytesReceived <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">while</span> (<span class="operator">!</span>tcpServer<span class="operator">.</span>isListening() <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>tcpServer<span class="operator">.</span>listen()) { <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>StandardButton ret <span class="operator">=</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>critical(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Loopback"</span>)<span class="operator">,</span> tr(<span class="string">"Unable to start the test: %1."</span>) <span class="operator">.</span>arg(tcpServer<span class="operator">.</span>errorString())<span class="operator">,</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Retry <span class="operator">|</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Cancel); <span class="keyword">if</span> (ret <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Cancel) <span class="keyword">return</span>; } serverStatusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Listening"</span>)); clientStatusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Connecting"</span>)); tcpClient<span class="operator">.</span>connectToHost(<span class="type"><a href="qhostaddress.html">QHostAddress</a></span><span class="operator">::</span>LocalHost<span class="operator">,</span> tcpServer<span class="operator">.</span>serverPort()); } <span class="type">void</span> Dialog<span class="operator">::</span>acceptConnection() { tcpServerConnection <span class="operator">=</span> tcpServer<span class="operator">.</span>nextPendingConnection(); connect(tcpServerConnection<span class="operator">,</span> SIGNAL(readyRead())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(updateServerProgress())); connect(tcpServerConnection<span class="operator">,</span> SIGNAL(error(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketError))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(displayError(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketError))); serverStatusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Accepted connection"</span>)); tcpServer<span class="operator">.</span>close(); } <span class="type">void</span> Dialog<span class="operator">::</span>startTransfer() { <span class="comment">// called when the TCP client connected to the loopback server</span> bytesToWrite <span class="operator">=</span> TotalBytes <span class="operator">-</span> (<span class="type">int</span>)tcpClient<span class="operator">.</span>write(<span class="type"><a href="qbytearray.html">QByteArray</a></span>(PayloadSize<span class="operator">,</span> <span class="char">'@'</span>)); clientStatusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Connected"</span>)); } <span class="type">void</span> Dialog<span class="operator">::</span>updateServerProgress() { bytesReceived <span class="operator">+</span><span class="operator">=</span> (<span class="type">int</span>)tcpServerConnection<span class="operator">-</span><span class="operator">></span>bytesAvailable(); tcpServerConnection<span class="operator">-</span><span class="operator">></span>readAll(); serverProgressBar<span class="operator">-</span><span class="operator">></span>setMaximum(TotalBytes); serverProgressBar<span class="operator">-</span><span class="operator">></span>setValue(bytesReceived); serverStatusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Received %1MB"</span>) <span class="operator">.</span>arg(bytesReceived <span class="operator">/</span> (<span class="number">1024</span> <span class="operator">*</span> <span class="number">1024</span>))); <span class="keyword">if</span> (bytesReceived <span class="operator">=</span><span class="operator">=</span> TotalBytes) { tcpServerConnection<span class="operator">-</span><span class="operator">></span>close(); <span class="preprocessor">#ifdef Q_OS_SYMBIAN</span> startAction<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">true</span>); <span class="preprocessor">#else</span> startButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); <span class="preprocessor">#endif</span> <span class="preprocessor">#ifndef QT_NO_CURSOR</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>restoreOverrideCursor(); <span class="preprocessor">#endif</span> } } <span class="type">void</span> Dialog<span class="operator">::</span>updateClientProgress(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> numBytes) { <span class="comment">// callen when the TCP client has written some bytes</span> bytesWritten <span class="operator">+</span><span class="operator">=</span> (<span class="type">int</span>)numBytes; <span class="comment">// only write more if not finished and when the Qt write buffer is below a certain size.</span> <span class="keyword">if</span> (bytesToWrite <span class="operator">></span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> tcpClient<span class="operator">.</span>bytesToWrite() <span class="operator"><</span><span class="operator">=</span> <span class="number">4</span><span class="operator">*</span>PayloadSize) bytesToWrite <span class="operator">-</span><span class="operator">=</span> (<span class="type">int</span>)tcpClient<span class="operator">.</span>write(<span class="type"><a href="qbytearray.html">QByteArray</a></span>(<a href="qtglobal.html#qMin">qMin</a>(bytesToWrite<span class="operator">,</span> PayloadSize)<span class="operator">,</span> <span class="char">'@'</span>)); clientProgressBar<span class="operator">-</span><span class="operator">></span>setMaximum(TotalBytes); clientProgressBar<span class="operator">-</span><span class="operator">></span>setValue(bytesWritten); clientStatusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Sent %1MB"</span>) <span class="operator">.</span>arg(bytesWritten <span class="operator">/</span> (<span class="number">1024</span> <span class="operator">*</span> <span class="number">1024</span>))); } <span class="type">void</span> Dialog<span class="operator">::</span>displayError(<span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>SocketError socketError) { <span class="keyword">if</span> (socketError <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qtcpsocket.html">QTcpSocket</a></span><span class="operator">::</span>RemoteHostClosedError) <span class="keyword">return</span>; <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Network error"</span>)<span class="operator">,</span> tr(<span class="string">"The following error occurred: %1."</span>) <span class="operator">.</span>arg(tcpClient<span class="operator">.</span>errorString())); tcpClient<span class="operator">.</span>close(); tcpServer<span class="operator">.</span>close(); clientProgressBar<span class="operator">-</span><span class="operator">></span>reset(); serverProgressBar<span class="operator">-</span><span class="operator">></span>reset(); clientStatusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Client ready"</span>)); serverStatusLabel<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Server ready"</span>)); <span class="preprocessor">#ifdef Q_OS_SYMBIAN</span> startAction<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">true</span>); <span class="preprocessor">#else</span> startButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); <span class="preprocessor">#endif</span> <span class="preprocessor">#ifndef QT_NO_CURSOR</span> <span class="type"><a href="qapplication.html">QApplication</a></span><span class="operator">::</span>restoreOverrideCursor(); <span class="preprocessor">#endif</span> }</pre> </div> <!-- @@@network/loopback/dialog.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.</p> <br /> <p> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> Qt and respective logos are trademarks of The Qt Company Ltd in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. <a title="Privacy Policy" href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p> </div> <script src="scripts/functions.js" type="text/javascript"></script> </body> </html>