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<h1 class="title">complexping.cpp Example File</h1>
<span class="small-subtitle">dbus/complexpingpong/complexping.cpp</span>
<!-- $$$dbus/complexpingpong/complexping.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:
**
** &quot;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
** &quot;AS IS&quot; 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.&quot;
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include &lt;stdio.h&gt;</span>
<span class="preprocessor">#include &lt;QtCore/QCoreApplication&gt;</span>
<span class="preprocessor">#include &lt;QtCore/QFile&gt;</span>
<span class="preprocessor">#include &lt;QtCore/QDebug&gt;</span>
<span class="preprocessor">#include &lt;QtCore/QProcess&gt;</span>
<span class="preprocessor">#include &lt;QtDBus/QtDBus&gt;</span>
<span class="preprocessor">#include &quot;ping-common.h&quot;</span>
<span class="preprocessor">#include &quot;complexping.h&quot;</span>
<span class="type">void</span> Ping<span class="operator">::</span>start(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>name<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>oldValue<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>newValue)
{
Q_UNUSED(oldValue);
<span class="keyword">if</span> (name <span class="operator">!</span><span class="operator">=</span> SERVICE_NAME <span class="operator">|</span><span class="operator">|</span> newValue<span class="operator">.</span>isEmpty())
<span class="keyword">return</span>;
<span class="comment">// open stdin for reading</span>
qstdin<span class="operator">.</span>open(stdin<span class="operator">,</span> <span class="type"><a href="qiodevice.html">QIODevice</a></span><span class="operator">::</span>ReadOnly);
<span class="comment">// find our remote</span>
iface <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qdbusinterface.html">QDBusInterface</a></span>(SERVICE_NAME<span class="operator">,</span> <span class="string">&quot;/&quot;</span><span class="operator">,</span> <span class="string">&quot;com.trolltech.QtDBus.ComplexPong.Pong&quot;</span><span class="operator">,</span>
<span class="type"><a href="qdbusconnection.html">QDBusConnection</a></span><span class="operator">::</span>sessionBus()<span class="operator">,</span> <span class="keyword">this</span>);
<span class="keyword">if</span> (<span class="operator">!</span>iface<span class="operator">-</span><span class="operator">&gt;</span>isValid()) {
fprintf(stderr<span class="operator">,</span> <span class="string">&quot;%s\n&quot;</span><span class="operator">,</span>
<a href="qtglobal.html#qPrintable">qPrintable</a>(<span class="type"><a href="qdbusconnection.html">QDBusConnection</a></span><span class="operator">::</span>sessionBus()<span class="operator">.</span>lastError()<span class="operator">.</span>message()));
<span class="type"><a href="qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>instance()<span class="operator">-</span><span class="operator">&gt;</span>quit();
}
connect(iface<span class="operator">,</span> SIGNAL(aboutToQuit())<span class="operator">,</span> <span class="type"><a href="qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>instance()<span class="operator">,</span> SLOT(quit()));
<span class="keyword">while</span> (<span class="keyword">true</span>) {
printf(<span class="string">&quot;Ask your question: &quot;</span>);
<span class="type"><a href="qstring.html">QString</a></span> line <span class="operator">=</span> <span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>fromLocal8Bit(qstdin<span class="operator">.</span>readLine())<span class="operator">.</span>trimmed();
<span class="keyword">if</span> (line<span class="operator">.</span>isEmpty()) {
iface<span class="operator">-</span><span class="operator">&gt;</span>call(<span class="string">&quot;quit&quot;</span>);
<span class="keyword">return</span>;
} <span class="keyword">else</span> <span class="keyword">if</span> (line <span class="operator">=</span><span class="operator">=</span> <span class="string">&quot;value&quot;</span>) {
<span class="type"><a href="qvariant.html">QVariant</a></span> reply <span class="operator">=</span> iface<span class="operator">-</span><span class="operator">&gt;</span>property(<span class="string">&quot;value&quot;</span>);
<span class="keyword">if</span> (<span class="operator">!</span>reply<span class="operator">.</span>isNull())
printf(<span class="string">&quot;value = %s\n&quot;</span><span class="operator">,</span> <a href="qtglobal.html#qPrintable">qPrintable</a>(reply<span class="operator">.</span>toString()));
} <span class="keyword">else</span> <span class="keyword">if</span> (line<span class="operator">.</span>startsWith(<span class="string">&quot;value=&quot;</span>)) {
iface<span class="operator">-</span><span class="operator">&gt;</span>setProperty(<span class="string">&quot;value&quot;</span><span class="operator">,</span> line<span class="operator">.</span>mid(<span class="number">6</span>));
} <span class="keyword">else</span> {
<span class="type"><a href="qdbusreply.html">QDBusReply</a></span><span class="operator">&lt;</span><span class="type"><a href="qdbusvariant.html">QDBusVariant</a></span><span class="operator">&gt;</span> reply <span class="operator">=</span> iface<span class="operator">-</span><span class="operator">&gt;</span>call(<span class="string">&quot;query&quot;</span><span class="operator">,</span> line);
<span class="keyword">if</span> (reply<span class="operator">.</span>isValid())
printf(<span class="string">&quot;Reply was: %s\n&quot;</span><span class="operator">,</span> <a href="qtglobal.html#qPrintable">qPrintable</a>(reply<span class="operator">.</span>value()<span class="operator">.</span>variant()<span class="operator">.</span>toString()));
}
<span class="keyword">if</span> (iface<span class="operator">-</span><span class="operator">&gt;</span>lastError()<span class="operator">.</span>isValid())
fprintf(stderr<span class="operator">,</span> <span class="string">&quot;Call failed: %s\n&quot;</span><span class="operator">,</span> <a href="qtglobal.html#qPrintable">qPrintable</a>(iface<span class="operator">-</span><span class="operator">&gt;</span>lastError()<span class="operator">.</span>message()));
}
}
<span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span><span class="operator">*</span>argv)
{
<span class="type"><a href="qcoreapplication.html">QCoreApplication</a></span> app(argc<span class="operator">,</span> argv);
<span class="keyword">if</span> (<span class="operator">!</span><span class="type"><a href="qdbusconnection.html">QDBusConnection</a></span><span class="operator">::</span>sessionBus()<span class="operator">.</span>isConnected()) {
fprintf(stderr<span class="operator">,</span> <span class="string">&quot;Cannot connect to the D-Bus session bus.\n&quot;</span>
<span class="string">&quot;To start it, run:\n&quot;</span>
<span class="string">&quot;\teval `dbus-launch --auto-syntax`\n&quot;</span>);
<span class="keyword">return</span> <span class="number">1</span>;
}
Ping ping;
ping<span class="operator">.</span>connect(<span class="type"><a href="qdbusconnection.html">QDBusConnection</a></span><span class="operator">::</span>sessionBus()<span class="operator">.</span>interface()<span class="operator">,</span>
SIGNAL(serviceOwnerChanged(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span>
SLOT(start(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span>)));
<span class="type"><a href="qprocess.html">QProcess</a></span> pong;
pong<span class="operator">.</span>start(<span class="string">&quot;./complexpong&quot;</span>);
app<span class="operator">.</span>exec();
}</pre>
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<!-- @@@dbus/complexpingpong/complexping.cpp -->
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