<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>complexping.cpp Example File | Qt D-Bus</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtdbus-index.html">Qt D-Bus</a></td><td ><a href="qtdbus-complexpingpong-example.html">D-Bus Complex Ping Pong Example</a></td><td >complexping.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtdbus-index.html">Qt 5.12.2 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">complexping.cpp Example File</h1> <span class="subtitle">complexpingpong/complexping.cpp</span> <!-- $$$complexpingpong/complexping.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, 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 <stdio.h></span> <span class="preprocessor">#include <QtCore/QCoreApplication></span> <span class="preprocessor">#include <QtCore/QFile></span> <span class="preprocessor">#include <QtCore/QDebug></span> <span class="preprocessor">#include <QtCore/QProcess></span> <span class="preprocessor">#include <QtDBus/QtDBus></span> <span class="preprocessor">#include "ping-common.h"</span> <span class="preprocessor">#include "complexping.h"</span> <span class="type">void</span> Ping<span class="operator">::</span>start(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>name) { <span class="keyword">if</span> (name <span class="operator">!</span><span class="operator">=</span> SERVICE_NAME) <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="../qtcore/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">"/"</span><span class="operator">,</span> <span class="string">"org.example.QtDBus.ComplexPong.Pong"</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">></span>isValid()) { fprintf(stderr<span class="operator">,</span> <span class="string">"%s\n"</span><span class="operator">,</span> <a href="../qtcore/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="../qtcore/qcoreapplication.html">QCoreApplication</a></span><span class="operator">::</span>instance()<span class="operator">-</span><span class="operator">></span>quit(); } connect(iface<span class="operator">,</span> SIGNAL(aboutToQuit())<span class="operator">,</span> <span class="type"><a href="../qtcore/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">"Ask your question: "</span>); <span class="type"><a href="../qtcore/qstring.html">QString</a></span> line <span class="operator">=</span> <span class="type"><a href="../qtcore/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">></span>call(<span class="string">"quit"</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">"value"</span>) { <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> reply <span class="operator">=</span> iface<span class="operator">-</span><span class="operator">></span>property(<span class="string">"value"</span>); <span class="keyword">if</span> (<span class="operator">!</span>reply<span class="operator">.</span>isNull()) printf(<span class="string">"value = %s\n"</span><span class="operator">,</span> <a href="../qtcore/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">"value="</span>)) { iface<span class="operator">-</span><span class="operator">></span>setProperty(<span class="string">"value"</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"><</span><span class="type"><a href="qdbusvariant.html">QDBusVariant</a></span><span class="operator">></span> reply <span class="operator">=</span> iface<span class="operator">-</span><span class="operator">></span>call(<span class="string">"query"</span><span class="operator">,</span> line); <span class="keyword">if</span> (reply<span class="operator">.</span>isValid()) printf(<span class="string">"Reply was: %s\n"</span><span class="operator">,</span> <a href="../qtcore/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">></span>lastError()<span class="operator">.</span>isValid()) fprintf(stderr<span class="operator">,</span> <span class="string">"Call failed: %s\n"</span><span class="operator">,</span> <a href="../qtcore/qtglobal.html#qPrintable">qPrintable</a>(iface<span class="operator">-</span><span class="operator">></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="../qtcore/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">"Cannot connect to the D-Bus session bus.\n"</span> <span class="string">"To start it, run:\n"</span> <span class="string">"\teval `dbus-launch --auto-syntax`\n"</span>); <span class="keyword">return</span> <span class="number">1</span>; } <span class="type"><a href="qdbusservicewatcher.html">QDBusServiceWatcher</a></span> serviceWatcher(SERVICE_NAME<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="type"><a href="qdbusservicewatcher.html">QDBusServiceWatcher</a></span><span class="operator">::</span>WatchForRegistration); Ping ping; <span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>connect(<span class="operator">&</span>serviceWatcher<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qdbusservicewatcher.html">QDBusServiceWatcher</a></span><span class="operator">::</span>serviceRegistered<span class="operator">,</span> <span class="operator">&</span>ping<span class="operator">,</span> <span class="operator">&</span>Ping<span class="operator">::</span>start); <span class="type"><a href="../qtcore/qprocess.html">QProcess</a></span> pong; pong<span class="operator">.</span>start(<span class="string">"./complexpong"</span>); app<span class="operator">.</span>exec(); } </pre> </div> <!-- @@@complexpingpong/complexping.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> 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.<br/> 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. </p> </div> </body> </html>