- Qt 5.5
- Qt Network
- Threaded Fortune Server Example
- dialog.cpp Example File
- Qt 5.5.1 Reference Documentation

# dialog.cpp Example File

threadedfortuneserver/dialog.cpp

    /****************************************************************************
    **
    ** 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:
    **
    ** "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."
    **
    ** $QT_END_LICENSE$
    **
    ****************************************************************************/

    #include <QtWidgets>
    #include <QtNetwork>

    #include <stdlib.h>

    #include "dialog.h"
    #include "fortuneserver.h"

    Dialog::Dialog(QWidget *parent)
        : QWidget(parent)
    {
        statusLabel = new QLabel;
        statusLabel->setWordWrap(true);
        quitButton = new QPushButton(tr("Quit"));
        quitButton->setAutoDefault(false);

        if (!server.listen()) {
            QMessageBox::critical(this, tr("Threaded Fortune Server"),
                                  tr("Unable to start the server: %1.")
                                  .arg(server.errorString()));
            close();
            return;
        }

        QString ipAddress;
        QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
        // use the first non-localhost IPv4 address
        for (int i = 0; i < ipAddressesList.size(); ++i) {
            if (ipAddressesList.at(i) != QHostAddress::LocalHost &&
                ipAddressesList.at(i).toIPv4Address()) {
                ipAddress = ipAddressesList.at(i).toString();
                break;
            }
        }
        // if we did not find one, use IPv4 localhost
        if (ipAddress.isEmpty())
            ipAddress = QHostAddress(QHostAddress::LocalHost).toString();
        statusLabel->setText(tr("The server is running on\n\nIP: %1\nport: %2\n\n"
                                "Run the Fortune Client example now.")
                             .arg(ipAddress).arg(server.serverPort()));

        connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));

        QHBoxLayout *buttonLayout = new QHBoxLayout;
        buttonLayout->addStretch(1);
        buttonLayout->addWidget(quitButton);
        buttonLayout->addStretch(1);

        QVBoxLayout *mainLayout = new QVBoxLayout;
        mainLayout->addWidget(statusLabel);
        mainLayout->addLayout(buttonLayout);
        setLayout(mainLayout);
        setWindowTitle(tr("Threaded Fortune Server"));
    }