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<h1 class="title">client.cpp Example File</h1>
<span class="small-subtitle">ipc/localfortuneclient/client.cpp</span>
<!-- $$$ipc/localfortuneclient/client.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 "client.h"</span>
Client<span class="operator">::</span>Client(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
<span class="preprocessor">#ifdef Q_WS_MAEMO_5</span>
: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
<span class="preprocessor">#else</span>
: <span class="type"><a href="qdialog.html">QDialog</a></span>(parent)
<span class="preprocessor">#endif</span>
{
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>));
hostLineEdit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>(<span class="string">"fortune"</span>);
hostLabel<span class="operator">-</span><span class="operator">></span>setBuddy(hostLineEdit);
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>);
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>);
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);
socket <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlocalsocket.html">QLocalSocket</a></span>(<span class="keyword">this</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(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()));
connect(socket<span class="operator">,</span> SIGNAL(readyRead())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(readFortune()));
connect(socket<span class="operator">,</span> SIGNAL(error(<span class="type"><a href="qlocalsocket.html">QLocalSocket</a></span><span class="operator">::</span>LocalSocketError))<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SLOT(displayError(<span class="type"><a href="qlocalsocket.html">QLocalSocket</a></span><span class="operator">::</span>LocalSocketError)));
<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(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>);
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>);
setLayout(mainLayout);
setWindowTitle(tr(<span class="string">"Fortune Client"</span>));
hostLineEdit<span class="operator">-</span><span class="operator">></span>setFocus();
}
<span class="type">void</span> Client<span class="operator">::</span>requestNewFortune()
{
getFortuneButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>);
blockSize <span class="operator">=</span> <span class="number">0</span>;
socket<span class="operator">-</span><span class="operator">></span>abort();
socket<span class="operator">-</span><span class="operator">></span>connectToServer(hostLineEdit<span class="operator">-</span><span class="operator">></span>text());
}
<span class="type">void</span> Client<span class="operator">::</span>readFortune()
{
<span class="type"><a href="qdatastream.html">QDataStream</a></span> in(socket);
in<span class="operator">.</span>setVersion(<span class="type"><a href="qdatastream.html">QDataStream</a></span><span class="operator">::</span>Qt_4_0);
<span class="keyword">if</span> (blockSize <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) {
<span class="keyword">if</span> (socket<span class="operator">-</span><span class="operator">></span>bytesAvailable() <span class="operator"><</span> (<span class="type">int</span>)<span class="keyword">sizeof</span>(<span class="type"><a href="qtglobal.html#quint16-typedef">quint16</a></span>))
<span class="keyword">return</span>;
in <span class="operator">></span><span class="operator">></span> blockSize;
}
<span class="keyword">if</span> (in<span class="operator">.</span>atEnd())
<span class="keyword">return</span>;
<span class="type"><a href="qstring.html">QString</a></span> nextFortune;
in <span class="operator">></span><span class="operator">></span> nextFortune;
<span class="keyword">if</span> (nextFortune <span class="operator">=</span><span class="operator">=</span> currentFortune) {
<span class="type"><a href="qtimer.html">QTimer</a></span><span class="operator">::</span>singleShot(<span class="number">0</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(requestNewFortune()));
<span class="keyword">return</span>;
}
currentFortune <span class="operator">=</span> nextFortune;
statusLabel<span class="operator">-</span><span class="operator">></span>setText(currentFortune);
getFortuneButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>);
}
<span class="type">void</span> Client<span class="operator">::</span>displayError(<span class="type"><a href="qlocalsocket.html">QLocalSocket</a></span><span class="operator">::</span>LocalSocketError socketError)
{
<span class="keyword">switch</span> (socketError) {
<span class="keyword">case</span> <span class="type"><a href="qlocalsocket.html">QLocalSocket</a></span><span class="operator">::</span>ServerNotFoundError:
<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">"Fortune Client"</span>)<span class="operator">,</span>
tr(<span class="string">"The host was not found. Please check the "</span>
<span class="string">"host name and port settings."</span>));
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="type"><a href="qlocalsocket.html">QLocalSocket</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">"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">case</span> <span class="type"><a href="qlocalsocket.html">QLocalSocket</a></span><span class="operator">::</span>PeerClosedError:
<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">"Fortune Client"</span>)<span class="operator">,</span>
tr(<span class="string">"The following error occurred: %1."</span>)
<span class="operator">.</span>arg(socket<span class="operator">-</span><span class="operator">></span>errorString()));
}
getFortuneButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>);
}
<span class="type">void</span> Client<span class="operator">::</span>enableGetFortuneButton()
{
getFortuneButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="operator">!</span>hostLineEdit<span class="operator">-</span><span class="operator">></span>text()<span class="operator">.</span>isEmpty());
}</pre>
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<!-- @@@ipc/localfortuneclient/client.cpp -->
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