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<h1 class="title">chat.cpp Example File</h1>
<span class="small-subtitle">dbus/dbus-chat/chat.cpp</span>
<!-- $$$dbus/dbus-chat/chat.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 &quot;chat.h&quot;</span>
<span class="preprocessor">#include &lt;QtGui/QApplication&gt;</span>
<span class="preprocessor">#include &lt;QtGui/QMessageBox&gt;</span>
<span class="preprocessor">#include &quot;chat_adaptor.h&quot;</span>
<span class="preprocessor">#include &quot;chat_interface.h&quot;</span>
ChatMainWindow<span class="operator">::</span>ChatMainWindow()
: m_nickname(QLatin1String(<span class="string">&quot;nickname&quot;</span>))
{
setupUi(<span class="keyword">this</span>);
sendButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(<span class="keyword">false</span>);
connect(messageLineEdit<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(textChangedSlot(<span class="type"><a href="qstring.html">QString</a></span>)));
connect(sendButton<span class="operator">,</span> SIGNAL(clicked(<span class="type">bool</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(sendClickedSlot()));
connect(actionChangeNickname<span class="operator">,</span> SIGNAL(triggered(<span class="type">bool</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(changeNickname()));
connect(actionAboutQt<span class="operator">,</span> SIGNAL(triggered(<span class="type">bool</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(aboutQt()));
connect(qApp<span class="operator">,</span> SIGNAL(lastWindowClosed())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(exiting()));
<span class="comment">// add our D-Bus interface and connect to D-Bus</span>
<span class="keyword">new</span> ChatAdaptor(<span class="keyword">this</span>);
<span class="type"><a href="qdbusconnection.html">QDBusConnection</a></span><span class="operator">::</span>sessionBus()<span class="operator">.</span>registerObject(<span class="string">&quot;/&quot;</span><span class="operator">,</span> <span class="keyword">this</span>);
com<span class="operator">::</span>trolltech<span class="operator">::</span>chat <span class="operator">*</span>iface;
iface <span class="operator">=</span> <span class="keyword">new</span> com<span class="operator">::</span>trolltech<span class="operator">::</span>chat(<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="qdbusconnection.html">QDBusConnection</a></span><span class="operator">::</span>sessionBus()<span class="operator">,</span> <span class="keyword">this</span>);
<span class="comment">//connect(iface, SIGNAL(message(QString,QString)), this, SLOT(messageSlot(QString,QString)));</span>
<span class="type"><a href="qdbusconnection.html">QDBusConnection</a></span><span class="operator">::</span>sessionBus()<span class="operator">.</span>connect(<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="string">&quot;com.trolltech.chat&quot;</span><span class="operator">,</span> <span class="string">&quot;message&quot;</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(messageSlot(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span>)));
connect(iface<span class="operator">,</span> SIGNAL(action(<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="keyword">this</span><span class="operator">,</span> SLOT(actionSlot(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span><span class="type"><a href="qstring.html">QString</a></span>)));
NicknameDialog dialog;
dialog<span class="operator">.</span>cancelButton<span class="operator">-</span><span class="operator">&gt;</span>setVisible(<span class="keyword">false</span>);
dialog<span class="operator">.</span>exec();
m_nickname <span class="operator">=</span> dialog<span class="operator">.</span>nickname<span class="operator">-</span><span class="operator">&gt;</span>text()<span class="operator">.</span>trimmed();
<span class="keyword">emit</span> action(m_nickname<span class="operator">,</span> QLatin1String(<span class="string">&quot;joins the chat&quot;</span>));
}
ChatMainWindow<span class="operator">::</span><span class="operator">~</span>ChatMainWindow()
{
}
<span class="type">void</span> ChatMainWindow<span class="operator">::</span>rebuildHistory()
{
<span class="type"><a href="qstring.html">QString</a></span> history <span class="operator">=</span> m_messages<span class="operator">.</span>join( QLatin1String(<span class="string">&quot;\n&quot;</span> ) );
chatHistory<span class="operator">-</span><span class="operator">&gt;</span>setPlainText(history);
}
<span class="type">void</span> ChatMainWindow<span class="operator">::</span>messageSlot(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>nickname<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>text)
{
<span class="type"><a href="qstring.html">QString</a></span> msg( QLatin1String(<span class="string">&quot;&lt;%1&gt; %2&quot;</span>) );
msg <span class="operator">=</span> msg<span class="operator">.</span>arg(nickname<span class="operator">,</span> text);
m_messages<span class="operator">.</span>append(msg);
<span class="keyword">if</span> (m_messages<span class="operator">.</span>count() <span class="operator">&gt;</span> <span class="number">100</span>)
m_messages<span class="operator">.</span>removeFirst();
rebuildHistory();
}
<span class="type">void</span> ChatMainWindow<span class="operator">::</span>actionSlot(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>nickname<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>text)
{
<span class="type"><a href="qstring.html">QString</a></span> msg( QLatin1String(<span class="string">&quot;* %1 %2&quot;</span>) );
msg <span class="operator">=</span> msg<span class="operator">.</span>arg(nickname<span class="operator">,</span> text);
m_messages<span class="operator">.</span>append(msg);
<span class="keyword">if</span> (m_messages<span class="operator">.</span>count() <span class="operator">&gt;</span> <span class="number">100</span>)
m_messages<span class="operator">.</span>removeFirst();
rebuildHistory();
}
<span class="type">void</span> ChatMainWindow<span class="operator">::</span>textChangedSlot(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&amp;</span>newText)
{
sendButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(<span class="operator">!</span>newText<span class="operator">.</span>isEmpty());
}
<span class="type">void</span> ChatMainWindow<span class="operator">::</span>sendClickedSlot()
{
<span class="comment">//emit message(m_nickname, messageLineEdit-&gt;text());</span>
<span class="type"><a href="qdbusmessage.html">QDBusMessage</a></span> msg <span class="operator">=</span> <span class="type"><a href="qdbusmessage.html">QDBusMessage</a></span><span class="operator">::</span>createSignal(<span class="string">&quot;/&quot;</span><span class="operator">,</span> <span class="string">&quot;com.trolltech.chat&quot;</span><span class="operator">,</span> <span class="string">&quot;message&quot;</span>);
msg <span class="operator">&lt;</span><span class="operator">&lt;</span> m_nickname <span class="operator">&lt;</span><span class="operator">&lt;</span> messageLineEdit<span class="operator">-</span><span class="operator">&gt;</span>text();
<span class="type"><a href="qdbusconnection.html">QDBusConnection</a></span><span class="operator">::</span>sessionBus()<span class="operator">.</span>send(msg);
messageLineEdit<span class="operator">-</span><span class="operator">&gt;</span>setText(<span class="type"><a href="qstring.html">QString</a></span>());
}
<span class="type">void</span> ChatMainWindow<span class="operator">::</span>changeNickname()
{
NicknameDialog dialog(<span class="keyword">this</span>);
<span class="keyword">if</span> (dialog<span class="operator">.</span>exec() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qdialog.html">QDialog</a></span><span class="operator">::</span>Accepted) {
<span class="type"><a href="qstring.html">QString</a></span> old <span class="operator">=</span> m_nickname;
m_nickname <span class="operator">=</span> dialog<span class="operator">.</span>nickname<span class="operator">-</span><span class="operator">&gt;</span>text()<span class="operator">.</span>trimmed();
<span class="keyword">emit</span> action(old<span class="operator">,</span> <span class="type"><a href="qstring.html">QString</a></span>(<span class="string">&quot;is now known as %1&quot;</span>)<span class="operator">.</span>arg(m_nickname));
}
}
<span class="type">void</span> ChatMainWindow<span class="operator">::</span>aboutQt()
{
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>aboutQt(<span class="keyword">this</span>);
}
<span class="type">void</span> ChatMainWindow<span class="operator">::</span>exiting()
{
<span class="keyword">emit</span> action(m_nickname<span class="operator">,</span> QLatin1String(<span class="string">&quot;leaves the chat&quot;</span>));
}
NicknameDialog<span class="operator">::</span>NicknameDialog(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qdialog.html">QDialog</a></span>(parent)
{
setupUi(<span class="keyword">this</span>);
}
<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="qapplication.html">QApplication</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()) {
<a href="qtglobal.html#qWarning">qWarning</a>(<span class="string">&quot;Cannot connect to the D-Bus session bus.\n&quot;</span>
<span class="string">&quot;Please check your system settings and try again.\n&quot;</span>);
<span class="keyword">return</span> <span class="number">1</span>;
}
ChatMainWindow chat;
chat<span class="operator">.</span>show();
<span class="keyword">return</span> app<span class="operator">.</span>exec();
}</pre>
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<!-- @@@dbus/dbus-chat/chat.cpp -->
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