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<h1 class="title">mainwindow.cpp Example File</h1>
<span class="subtitle">secureudpclient/mainwindow.cpp</span>
<!-- $$$secureudpclient/mainwindow.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
<span class="comment">/****************************************************************************
**
** Copyright (C) 2018 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 <QtCore></span>
<span class="preprocessor">#include <QtNetwork></span>
<span class="preprocessor">#include "addressdialog.h"</span>
<span class="preprocessor">#include "association.h"</span>
<span class="preprocessor">#include "mainwindow.h"</span>
<span class="preprocessor">#include "ui_mainwindow.h"</span>
<span class="preprocessor">#include <utility></span>
MainWindow<span class="operator">::</span>MainWindow(<span class="type">QWidget</span> <span class="operator">*</span>parent)
: <span class="type">QMainWindow</span>(parent)<span class="operator">,</span>
ui(<span class="keyword">new</span> Ui<span class="operator">::</span>MainWindow)<span class="operator">,</span>
nameTemplate(<span class="type"><a href="../qtcore/qstring.html#QStringLiteral">QStringLiteral</a></span>(<span class="string">"Alice (clone number %1)"</span>))
{
ui<span class="operator">-</span><span class="operator">></span>setupUi(<span class="keyword">this</span>);
updateUi();
}
MainWindow<span class="operator">::</span><span class="operator">~</span>MainWindow()
{
<span class="keyword">delete</span> ui;
}
<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> colorizer(<span class="type"><a href="../qtcore/qstring.html#QStringLiteral">QStringLiteral</a></span>(<span class="string">"<font color=\"%1\">%2</font><br>"</span>));
<span class="type">void</span> MainWindow<span class="operator">::</span>addErrorMessage(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>message)
{
ui<span class="operator">-</span><span class="operator">></span>clientMessages<span class="operator">-</span><span class="operator">></span>insertHtml(colorizer<span class="operator">.</span>arg(<span class="type"><a href="../qtcore/qstring.html#QStringLiteral">QStringLiteral</a></span>(<span class="string">"Crimson"</span>)<span class="operator">,</span> message));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>addWarningMessage(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>message)
{
ui<span class="operator">-</span><span class="operator">></span>clientMessages<span class="operator">-</span><span class="operator">></span>insertHtml(colorizer<span class="operator">.</span>arg(<span class="type"><a href="../qtcore/qstring.html#QStringLiteral">QStringLiteral</a></span>(<span class="string">"DarkOrange"</span>)<span class="operator">,</span> message));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>addInfoMessage(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>message)
{
ui<span class="operator">-</span><span class="operator">></span>clientMessages<span class="operator">-</span><span class="operator">></span>insertHtml(colorizer<span class="operator">.</span>arg(<span class="type"><a href="../qtcore/qstring.html#QStringLiteral">QStringLiteral</a></span>(<span class="string">"DarkBlue"</span>)<span class="operator">,</span> message));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>addServerResponse(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>clientInfo<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> <span class="operator">&</span>datagram<span class="operator">,</span>
<span class="keyword">const</span> <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> <span class="operator">&</span>plainText)
{
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> messageColor <span class="operator">=</span> <span class="type"><a href="../qtcore/qstring.html#QStringLiteral">QStringLiteral</a></span>(<span class="string">"DarkMagenta"</span>);
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> formatter <span class="operator">=</span> <span class="type"><a href="../qtcore/qstring.html#QStringLiteral">QStringLiteral</a></span>(<span class="string">"<br>---------------"</span>
<span class="string">"<br>%1 received a DTLS datagram:<br> %2"</span>
<span class="string">"<br>As plain text:<br> %3"</span>);
<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> html <span class="operator">=</span> formatter<span class="operator">.</span>arg(clientInfo<span class="operator">,</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(datagram<span class="operator">.</span>toHex(<span class="char">' '</span>))<span class="operator">,</span>
<span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(plainText));
ui<span class="operator">-</span><span class="operator">></span>serverMessages<span class="operator">-</span><span class="operator">></span>insertHtml(colorizer<span class="operator">.</span>arg(messageColor<span class="operator">,</span> html));
}
<span class="type">void</span> MainWindow<span class="operator">::</span>on_connectButton_clicked()
{
<span class="keyword">if</span> (lookupId <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) {
<span class="type"><a href="qhostinfo.html">QHostInfo</a></span><span class="operator">::</span>abortHostLookup(lookupId);
lookupId <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>;
port <span class="operator">=</span> <span class="number">0</span>;
updateUi();
<span class="keyword">return</span>;
}
AddressDialog dialog;
<span class="keyword">if</span> (dialog<span class="operator">.</span>exec() <span class="operator">!</span><span class="operator">=</span> <span class="type">QDialog</span><span class="operator">::</span>Accepted)
<span class="keyword">return</span>;
<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> hostName <span class="operator">=</span> dialog<span class="operator">.</span>remoteName();
<span class="keyword">if</span> (hostName<span class="operator">.</span>isEmpty())
<span class="keyword">return</span> addWarningMessage(tr(<span class="string">"Host name or address required to connect"</span>));
port <span class="operator">=</span> dialog<span class="operator">.</span>remotePort();
<span class="type"><a href="qhostaddress.html">QHostAddress</a></span> remoteAddress;
<span class="keyword">if</span> (remoteAddress<span class="operator">.</span>setAddress(hostName))
<span class="keyword">return</span> startNewConnection(remoteAddress);
addInfoMessage(tr(<span class="string">"Looking up the host ..."</span>));
lookupId <span class="operator">=</span> <span class="type"><a href="qhostinfo.html">QHostInfo</a></span><span class="operator">::</span>lookupHost(hostName<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(lookupFinished(<span class="type"><a href="qhostinfo.html">QHostInfo</a></span>)));
updateUi();
}
<span class="type">void</span> MainWindow<span class="operator">::</span>updateUi()
{
ui<span class="operator">-</span><span class="operator">></span>connectButton<span class="operator">-</span><span class="operator">></span>setText(lookupId <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span> <span class="operator">?</span> tr(<span class="string">"Connect ..."</span>) : tr(<span class="string">"Cancel lookup"</span>));
ui<span class="operator">-</span><span class="operator">></span>shutdownButton<span class="operator">-</span><span class="operator">></span>setEnabled(connections<span class="operator">.</span>size() <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>);
}
<span class="type">void</span> MainWindow<span class="operator">::</span>lookupFinished(<span class="keyword">const</span> <span class="type"><a href="qhostinfo.html">QHostInfo</a></span> <span class="operator">&</span>hostInfo)
{
<span class="keyword">if</span> (hostInfo<span class="operator">.</span>lookupId() <span class="operator">!</span><span class="operator">=</span> lookupId)
<span class="keyword">return</span>;
lookupId <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>;
updateUi();
<span class="keyword">if</span> (hostInfo<span class="operator">.</span>error() <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qhostinfo.html">QHostInfo</a></span><span class="operator">::</span>NoError) {
addErrorMessage(hostInfo<span class="operator">.</span>errorString());
<span class="keyword">return</span>;
}
<span class="keyword">const</span> <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qhostaddress.html">QHostAddress</a></span><span class="operator">></span> foundAddresses <span class="operator">=</span> hostInfo<span class="operator">.</span>addresses();
<span class="keyword">if</span> (foundAddresses<span class="operator">.</span>empty()) {
addWarningMessage(tr(<span class="string">"Host not found"</span>));
<span class="keyword">return</span>;
}
<span class="keyword">const</span> <span class="keyword">auto</span> remoteAddress <span class="operator">=</span> foundAddresses<span class="operator">.</span>at(<span class="number">0</span>);
addInfoMessage(tr(<span class="string">"Connecting to: %1"</span>)<span class="operator">.</span>arg(remoteAddress<span class="operator">.</span>toString()));
startNewConnection(remoteAddress);
}
<span class="type">void</span> MainWindow<span class="operator">::</span>startNewConnection(<span class="keyword">const</span> <span class="type"><a href="qhostaddress.html">QHostAddress</a></span> <span class="operator">&</span>address)
{
AssocPtr newConnection(<span class="keyword">new</span> DtlsAssociation(address<span class="operator">,</span> port<span class="operator">,</span> nameTemplate<span class="operator">.</span>arg(nextId)));
connect(newConnection<span class="operator">.</span>data()<span class="operator">,</span> <span class="operator">&</span>DtlsAssociation<span class="operator">::</span>errorMessage<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>addErrorMessage);
connect(newConnection<span class="operator">.</span>data()<span class="operator">,</span> <span class="operator">&</span>DtlsAssociation<span class="operator">::</span>warningMessage<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>addWarningMessage);
connect(newConnection<span class="operator">.</span>data()<span class="operator">,</span> <span class="operator">&</span>DtlsAssociation<span class="operator">::</span>infoMessage<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>addInfoMessage);
connect(newConnection<span class="operator">.</span>data()<span class="operator">,</span> <span class="operator">&</span>DtlsAssociation<span class="operator">::</span>serverResponse<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWindow<span class="operator">::</span>addServerResponse);
connections<span class="operator">.</span>push_back(std<span class="operator">::</span>move(newConnection));
connections<span class="operator">.</span>back()<span class="operator">-</span><span class="operator">></span>startHandshake();
updateUi();
<span class="operator">+</span><span class="operator">+</span>nextId;
}
<span class="type">void</span> MainWindow<span class="operator">::</span>on_shutdownButton_clicked()
{
connections<span class="operator">.</span>clear();
updateUi();
}
</pre>
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<!-- @@@secureudpclient/mainwindow.cpp -->
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