360 lines
22 KiB
HTML
360 lines
22 KiB
HTML
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<h1 class="title">client.cpp Example File</h1>
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<span class="small-subtitle">ipc/localfortuneclient/client.cpp</span>
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<!-- $$$ipc/localfortuneclient/client.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include <QtGui></span>
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<span class="preprocessor">#include <QtNetwork></span>
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<span class="preprocessor">#include "client.h"</span>
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Client<span class="operator">::</span>Client(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
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<span class="preprocessor">#ifdef Q_WS_MAEMO_5</span>
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: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
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<span class="preprocessor">#else</span>
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: <span class="type"><a href="qdialog.html">QDialog</a></span>(parent)
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<span class="preprocessor">#endif</span>
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{
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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>));
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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>);
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hostLabel<span class="operator">-</span><span class="operator">></span>setBuddy(hostLineEdit);
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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>
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<span class="string">"Fortune Server example as well."</span>));
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statusLabel<span class="operator">-</span><span class="operator">></span>setWordWrap(<span class="keyword">true</span>);
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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>));
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getFortuneButton<span class="operator">-</span><span class="operator">></span>setDefault(<span class="keyword">true</span>);
|
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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>));
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|
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buttonBox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qdialogbuttonbox.html">QDialogButtonBox</a></span>;
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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);
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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);
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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>);
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connect(hostLineEdit<span class="operator">,</span> SIGNAL(textChanged(<span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span>
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<span class="keyword">this</span><span class="operator">,</span> SLOT(enableGetFortuneButton()));
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connect(getFortuneButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span>
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<span class="keyword">this</span><span class="operator">,</span> SLOT(requestNewFortune()));
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connect(quitButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(close()));
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connect(socket<span class="operator">,</span> SIGNAL(readyRead())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(readFortune()));
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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>
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<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)));
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<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>;
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|
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>);
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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>);
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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>);
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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>);
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setLayout(mainLayout);
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setWindowTitle(tr(<span class="string">"Fortune Client"</span>));
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hostLineEdit<span class="operator">-</span><span class="operator">></span>setFocus();
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}
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<span class="type">void</span> Client<span class="operator">::</span>requestNewFortune()
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{
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getFortuneButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>);
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blockSize <span class="operator">=</span> <span class="number">0</span>;
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|
socket<span class="operator">-</span><span class="operator">></span>abort();
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socket<span class="operator">-</span><span class="operator">></span>connectToServer(hostLineEdit<span class="operator">-</span><span class="operator">></span>text());
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}
|
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|
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<span class="type">void</span> Client<span class="operator">::</span>readFortune()
|
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{
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<span class="type"><a href="qdatastream.html">QDataStream</a></span> in(socket);
|
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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>))
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<span class="keyword">return</span>;
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in <span class="operator">></span><span class="operator">></span> blockSize;
|
|
}
|
|
|
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<span class="keyword">if</span> (in<span class="operator">.</span>atEnd())
|
|
<span class="keyword">return</span>;
|
|
|
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<span class="type"><a href="qstring.html">QString</a></span> nextFortune;
|
|
in <span class="operator">></span><span class="operator">></span> nextFortune;
|
|
|
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<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()));
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<span class="keyword">return</span>;
|
|
}
|
|
|
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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>));
|
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<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>
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|
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>
|
|
</div>
|
|
<!-- @@@ipc/localfortuneclient/client.cpp -->
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