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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">blockingclient.cpp Example File</h1> <span class="small-subtitle">network/blockingfortuneclient/blockingclient.cpp</span> <!-- $$$network/blockingfortuneclient/blockingclient.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 "blockingclient.h"</span> BlockingClient<span class="operator">::</span>BlockingClient(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qwidget.html">QWidget</a></span>(parent) { hostLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"&Server name:"</span>)); portLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"S&erver port:"</span>)); <span class="comment">// find out which IP to connect to</span> <span class="type"><a href="qstring.html">QString</a></span> ipAddress; <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qhostaddress.html">QHostAddress</a></span><span class="operator">></span> ipAddressesList <span class="operator">=</span> <span class="type"><a href="qnetworkinterface.html">QNetworkInterface</a></span><span class="operator">::</span>allAddresses(); <span class="comment">// use the first non-localhost IPv4 address</span> <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> ipAddressesList<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="keyword">if</span> (ipAddressesList<span class="operator">.</span>at(i) <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qhostaddress.html">QHostAddress</a></span><span class="operator">::</span>LocalHost <span class="operator">&</span><span class="operator">&</span> ipAddressesList<span class="operator">.</span>at(i)<span class="operator">.</span>toIPv4Address()) { ipAddress <span class="operator">=</span> ipAddressesList<span class="operator">.</span>at(i)<span class="operator">.</span>toString(); <span class="keyword">break</span>; } } <span class="comment">// if we did not find one, use IPv4 localhost</span> <span class="keyword">if</span> (ipAddress<span class="operator">.</span>isEmpty()) ipAddress <span class="operator">=</span> <span class="type"><a href="qhostaddress.html">QHostAddress</a></span>(<span class="type"><a href="qhostaddress.html">QHostAddress</a></span><span class="operator">::</span>LocalHost)<span class="operator">.</span>toString(); hostLineEdit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>(ipAddress); portLineEdit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>; portLineEdit<span class="operator">-</span><span class="operator">></span>setValidator(<span class="keyword">new</span> <span class="type"><a href="qintvalidator.html">QIntValidator</a></span>(<span class="number">1</span><span class="operator">,</span> <span class="number">65535</span><span class="operator">,</span> <span class="keyword">this</span>)); <span class="preprocessor">#if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5) || defined(Q_WS_SIMULATOR)</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>InputMethodHint hints <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>ImhDigitsOnly; portLineEdit<span class="operator">-</span><span class="operator">></span>setInputMethodHints(hints); <span class="preprocessor">#endif</span> hostLabel<span class="operator">-</span><span class="operator">></span>setBuddy(hostLineEdit); portLabel<span class="operator">-</span><span class="operator">></span>setBuddy(portLineEdit); statusLabel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"This examples requires that you run the "</span> <span class="string">"Fortune Server example as well."</span>)); statusLabel<span class="operator">-</span><span class="operator">></span>setWordWrap(<span class="keyword">true</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>); fortuneAction <span class="operator">=</span> menu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Get Fortune"</span>)); fortuneAction<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">false</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>setMenu(menu); 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); addAction(optionsAction); exitAction <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>); exitAction<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(exitAction); connect(fortuneAction<span class="operator">,</span> SIGNAL(triggered())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(requestNewFortune())); connect(exitAction<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> getFortuneButton <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(tr(<span class="string">"Get Fortune"</span>)); getFortuneButton<span class="operator">-</span><span class="operator">></span>setDefault(<span class="keyword">true</span>); getFortuneButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</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(getFortuneButton<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(getFortuneButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(requestNewFortune())); 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(hostLineEdit<span class="operator">,</span> SIGNAL(textChanged(<span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(enableGetFortuneButton())); connect(portLineEdit<span class="operator">,</span> SIGNAL(textChanged(<span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(enableGetFortuneButton())); connect(<span class="operator">&</span>thread<span class="operator">,</span> SIGNAL(newFortune(<span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(showFortune(<span class="type"><a href="qstring.html">QString</a></span>))); connect(<span class="operator">&</span>thread<span class="operator">,</span> SIGNAL(error(<span class="type">int</span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(displayError(<span class="type">int</span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span>))); <span class="type"><a href="qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>mainLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qgridlayout.html">QGridLayout</a></span>; mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(hostLabel<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(hostLineEdit<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span>); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(portLabel<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span>); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(portLineEdit<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>); mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(statusLabel<span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">2</span>); <span class="preprocessor">#ifndef Q_OS_SYMBIAN</span> mainLayout<span class="operator">-</span><span class="operator">></span>addWidget(buttonBox<span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">2</span>); <span class="preprocessor">#endif</span> setLayout(mainLayout); setWindowTitle(tr(<span class="string">"Blocking Fortune Client"</span>)); portLineEdit<span class="operator">-</span><span class="operator">></span>setFocus(); } <span class="type">void</span> BlockingClient<span class="operator">::</span>requestNewFortune() { <span class="preprocessor">#ifdef Q_OS_SYMBIAN</span> fortuneAction<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">false</span>); <span class="preprocessor">#else</span> getFortuneButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>); <span class="preprocessor">#endif</span> thread<span class="operator">.</span>requestNewFortune(hostLineEdit<span class="operator">-</span><span class="operator">></span>text()<span class="operator">,</span> portLineEdit<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>toInt()); } <span class="type">void</span> BlockingClient<span class="operator">::</span>showFortune(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>nextFortune) { <span class="keyword">if</span> (nextFortune <span class="operator">=</span><span class="operator">=</span> currentFortune) { requestNewFortune(); <span class="keyword">return</span>; } currentFortune <span class="operator">=</span> nextFortune; statusLabel<span class="operator">-</span><span class="operator">></span>setText(currentFortune); <span class="preprocessor">#ifdef Q_OS_SYMBIAN</span> fortuneAction<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">true</span>); <span class="preprocessor">#else</span> getFortuneButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); <span class="preprocessor">#endif</span> } <span class="type">void</span> BlockingClient<span class="operator">::</span>displayError(<span class="type">int</span> socketError<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>message) { <span class="keyword">switch</span> (socketError) { <span class="keyword">case</span> <span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>HostNotFoundError: <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">"Blocking Fortune Client"</span>)<span class="operator">,</span> tr(<span class="string">"The host was not found. Please check the "</span> <span class="string">"host and port settings."</span>)); <span class="keyword">break</span>; <span class="keyword">case</span> <span class="type"><a href="qabstractsocket.html">QAbstractSocket</a></span><span class="operator">::</span>ConnectionRefusedError: <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">"Blocking Fortune Client"</span>)<span class="operator">,</span> tr(<span class="string">"The connection was refused by the peer. "</span> <span class="string">"Make sure the fortune server is running, "</span> <span class="string">"and check that the host name and port "</span> <span class="string">"settings are correct."</span>)); <span class="keyword">break</span>; <span class="keyword">default</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">"Blocking Fortune Client"</span>)<span class="operator">,</span> tr(<span class="string">"The following error occurred: %1."</span>) <span class="operator">.</span>arg(message)); } <span class="preprocessor">#ifdef Q_OS_SYMBIAN</span> fortuneAction<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">true</span>); <span class="preprocessor">#else</span> getFortuneButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>); <span class="preprocessor">#endif</span> } <span class="type">void</span> BlockingClient<span class="operator">::</span>enableGetFortuneButton() { <span class="type">bool</span> enable(<span class="operator">!</span>hostLineEdit<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>isEmpty() <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>portLineEdit<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>isEmpty()); <span class="preprocessor">#ifdef Q_OS_SYMBIAN</span> fortuneAction<span class="operator">-</span><span class="operator">></span>setVisible(enable); <span class="preprocessor">#else</span> getFortuneButton<span class="operator">-</span><span class="operator">></span>setEnabled(enable); <span class="preprocessor">#endif</span> }</pre> </div> <!-- @@@network/blockingfortuneclient/blockingclient.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. 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