Initial MQTT bell app based on systray

doc/src/systray.qdoc

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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** 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.
+**
+** GNU Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \example desktop/systray
+    \title System Tray Icon Example
+    \ingroup examples-widgets
+    \brief The System Tray Icon example shows how to add an icon with a menu
+    and popup messages to a desktop environment's system tray.
+
+    \borderedimage systemtray-example.png
+    \caption Screenshot of the System Tray Icon
+
+    Modern operating systems usually provide a special area on the
+    desktop, called the system tray or notification area, where
+    long-running applications can display icons and short messages.
+
+    This example consists of one single class, \c Window, providing
+    the main application window (i.e., an editor for the system tray
+    icon) and the associated icon.
+
+    \borderedimage systemtray-editor.png
+
+    The editor allows the user to choose the preferred icon as well as
+    set the balloon message's type and duration. The user can also
+    edit the message's title and body. Finally, the editor provides a
+    checkbox controlling whether the icon is actually shown in the
+    system tray, or not.
+
+    \section1 Window Class Definition
+
+    The \c Window class inherits QWidget:
+
+    \snippet desktop/systray/window.h 0
+
+    We implement several private slots to respond to user
+    interaction. The other private functions are only convenience
+    functions provided to simplify the constructor.
+
+    The tray icon is an instance of the QSystemTrayIcon class. To
+    check whether a system tray is present on the user's desktop, call
+    the static QSystemTrayIcon::isSystemTrayAvailable()
+    function. Associated with the icon, we provide a menu containing
+    the typical \uicontrol minimize, \uicontrol maximize, \uicontrol restore and
+    \uicontrol quit actions. We reimplement the QWidget::setVisible() function to
+    update the tray icon's menu whenever the editor's appearance
+    changes, e.g., when maximizing or minimizing the main application
+    window.
+
+    Finally, we reimplement QWidget's \l {QWidget::}{closeEvent()}
+    function to be able to inform the user (when closing the editor
+    window) that the program will keep running in the system tray
+    until the user chooses the \uicontrol Quit entry in the icon's context
+    menu.
+
+    \section1 Window Class Implementation
+
+    When constructing the editor widget, we first create the various
+    editor elements before we create the actual system tray icon:
+
+    \snippet desktop/systray/window.cpp 0
+
+    We ensure that the application responds to user input by
+    connecting most of the editor's input widgets (including the
+    system tray icon) to the application's private slots. But note the
+    visibility checkbox; its \l {QCheckBox::}{toggled()} signal is
+    connected to the \e {icon}'s \l {QSystemTrayIcon::}{setVisible()}
+    function instead.
+
+    \snippet desktop/systray/window.cpp 3
+
+    The \c setIcon() slot is triggered whenever the current index in
+    the icon combobox changes, i.e., whenever the user chooses another
+    icon in the editor. Note that it is also called when the user
+    activates the tray icon with the left mouse button, triggering the
+    icon's \l {QSystemTrayIcon::}{activated()} signal. We will come
+    back to this signal shortly.
+
+    The QSystemTrayIcon::setIcon() function sets the \l
+    {QSystemTrayIcon::}{icon} property that holds the actual system
+    tray icon. On Windows, the system tray icon size is 16x16; on X11,
+    the preferred size is 22x22. The icon will be scaled to the
+    appropriate size as necessary.
+
+    Note that on X11, due to a limitation in the system tray
+    specification, mouse clicks on transparent areas in the icon are
+    propagated to the system tray. If this behavior is unacceptable,
+    we suggest using an icon with no transparency.
+
+    \snippet desktop/systray/window.cpp 4
+
+    Whenever the user activates the system tray icon, it emits its \l
+    {QSystemTrayIcon::}{activated()} signal passing the triggering
+    reason as parameter. QSystemTrayIcon provides the \l
+    {QSystemTrayIcon::}{ActivationReason} enum to describe how the
+    icon was activated.
+
+    In the constructor, we connected our icon's \l
+    {QSystemTrayIcon::}{activated()} signal to our custom \c
+    iconActivated() slot: If the user has clicked the icon using the
+    left mouse button, this function changes the icon image by
+    incrementing the icon combobox's current index, triggering the \c
+    setIcon() slot as mentioned above. If the user activates the icon
+    using the middle mouse button, it calls the custom \c
+    showMessage() slot:
+
+    \snippet desktop/systray/window.cpp 5
+
+    When the \e showMessage() slot is triggered, we first retrieve the
+    message icon depending on the currently chosen message type. The
+    QSystemTrayIcon::MessageIcon enum describes the icon that is shown
+    when a balloon message is displayed. Then we call
+    QSystemTrayIcon's \l {QSystemTrayIcon::}{showMessage()} function
+    to show the message with the title, body, and icon for the time
+    specified in milliseconds.
+
+    \macos users note: The Growl notification system must be
+    installed for QSystemTrayIcon::showMessage() to display messages.
+
+    QSystemTrayIcon also has the corresponding, \l {QSystemTrayIcon::}
+    {messageClicked()} signal, which is emitted when the user clicks a
+    message displayed by \l {QSystemTrayIcon::}{showMessage()}.
+
+    \snippet desktop/systray/window.cpp 6
+
+    In the constructor, we connected the \l
+    {QSystemTrayIcon::}{messageClicked()} signal to our custom \c
+    messageClicked() slot that simply displays a message using the
+    QMessageBox class.
+
+    QMessageBox provides a modal dialog with a short message, an icon,
+    and buttons laid out depending on the current style. It supports
+    four severity levels: "Question", "Information", "Warning" and
+    "Critical". The easiest way to pop up a message box in Qt is to
+    call one of the associated static functions, e.g.,
+    QMessageBox::information().
+
+    As we mentioned earlier, we reimplement a couple of QWidget's
+    virtual functions:
+
+    \snippet desktop/systray/window.cpp 1
+
+    Our reimplementation of the QWidget::setVisible() function updates
+    the tray icon's menu whenever the editor's appearance changes,
+    e.g., when maximizing or minimizing the main application window,
+    before calling the base class implementation.
+
+    \snippet desktop/systray/window.cpp 2
+
+    We have reimplemented the QWidget::closeEvent() event handler to
+    receive widget close events, showing the above message to the
+    users when they are closing the editor window. On \macos we need to
+    avoid showing the message and accepting the close event when the
+    user really intends to quit the application, that is, when the
+    user has triggered "Quit" in the menu bar or pressed the Command+Q
+    shortcut.
+
+    In addition to the functions and slots discussed above, we have
+    also implemented several convenience functions to simplify the
+    constructor: \c createIconGroupBox(), \c createMessageGroupBox(),
+    \c createActions() and \c createTrayIcon(). See the \c
+    {desktop/systray/window.cpp} file for details.
+*/

main.cpp

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+/****************************************************************************
+**
+** 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QApplication>
+
+#ifndef QT_NO_SYSTEMTRAYICON
+
+#include <QMessageBox>
+#include "window.h"
+#include "subscriber.h"
+
+int main(int argc, char *argv[])
+{
+    Q_INIT_RESOURCE(systray);
+
+    qDebug() << "Starting UP1...";
+
+    QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
+
+    QApplication app(argc, argv);
+
+    if (!QSystemTrayIcon::isSystemTrayAvailable()) {
+        QMessageBox::critical(nullptr, QObject::tr("Systray"),
+                             QObject::tr("I couldn't detect any system tray "
+                                          "on this system."));
+        return 1;
+    }
+    QApplication::setQuitOnLastWindowClosed(false);
+
+    Subscriber subscriber;
+    subscriber.connectToHost();
+
+    Window window;
+    window.show();
+
+    QObject::connect(&subscriber,&Subscriber::packetArrived,&window,&Window::packetArrived);
+    QObject::connect(&window,&Window::settingsChanged,&subscriber,&Subscriber::onSettingsChanged);
+
+    window.hide();
+    return app.exec();
+}
+
+#else
+
+#include <QLabel>
+#include <QDebug>
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    QString text("QSystemTrayIcon is not supported on this platform");
+
+    QLabel *label = new QLabel(text);
+    label->setWordWrap(true);
+
+    label->show();
+    qDebug() << text;
+
+    app.exec();
+}
+
+#endif

myudp.cpp

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+// myudp.cpp
+
+#include "myudp.h"
+#include <QTimer>
+#include <QNetworkInterface>
+
+MyUDP::MyUDP(QObject *parent) :
+    QObject(parent)
+{
+    // create a QUDP socket
+    socket = new QUdpSocket(this);
+
+    // The most common way to use QUdpSocket class is
+    // to bind to an address and port using bind()
+    // bool QAbstractSocket::bind(const QHostAddress & address,
+    //     quint16 port = 0, BindMode mode = DefaultForPlatform)
+    socket->bind(QHostAddress::AnyIPv4, 1234,QUdpSocket::ShareAddress);
+
+    connect(socket,SIGNAL(readyRead()),this,SLOT(readyRead()));
+
+    QTimer::singleShot(200, this, &MyUDP::join);
+
+}
+
+void MyUDP::join()
+{
+    setMulticast(QHostAddress("224.1.2.3"));
+}
+
+void MyUDP::setMulticast(QHostAddress address)
+{
+    if (listen_address != address) {
+
+        QList<QNetworkInterface> mListIfaces = QNetworkInterface::allInterfaces();
+
+        for (int i = 0; i < mListIfaces.length(); ++i) {
+            if (socket && socket->state() == QAbstractSocket::BoundState)
+                socket->leaveMulticastGroup(listen_address, mListIfaces.at(i));
+        }
+
+        listen_address = address;
+
+        for (int i = 0; i < mListIfaces.length(); ++i) {
+            qDebug() << socket->joinMulticastGroup(address,mListIfaces.at(i));
+        }
+
+
+        qDebug() << "EMIT MULTICAST CHANGED";
+        emit multicastChanged(address);
+    }
+}
+
+void MyUDP::HelloUDP()
+{
+    QByteArray Data;
+    Data.append("Hello from UDP");
+    qDebug() << "Sending message";
+
+    // Sends the datagram datagram
+    // to the host address and at port.
+    // qint64 QUdpSocket::writeDatagram(const QByteArray & datagram,
+    //                      const QHostAddress & host, quint16 port)
+    socket->writeDatagram(Data, QHostAddress::LocalHost, 1234);
+}
+
+void MyUDP::readyRead()
+{
+    // when data comes in
+    QByteArray buffer;
+    buffer.resize(socket->pendingDatagramSize());
+
+    QHostAddress sender;
+    quint16 senderPort;
+    int bellNumber;
+    QString header;
+    QString msg;
+
+    // qint64 QUdpSocket::readDatagram(char * data, qint64 maxSize,
+    //                 QHostAddress * address = 0, quint16 * port = 0)
+    // Receives a datagram no larger than maxSize bytes and stores it in data.
+    // The sender's host address and port is stored in *address and *port
+    // (unless the pointers are 0).
+
+    socket->readDatagram(buffer.data(), buffer.size(),
+                         &sender, &senderPort);
+
+
+    msg = QString::fromLatin1(buffer);
+    QStringList list1 = msg.split(QLatin1Char(':'));
+    qDebug() << msg;
+    qDebug() << "List Size: " << list1.size();
+    if (list1.size() >= 2) {
+        header = list1.at(0);
+        qDebug() << "H: " << header;
+        if (header == "BELL") {
+            bellNumber = list1.at(1).toInt();
+            emit packetArrived(bellNumber);
+        }
+    }
+
+    qDebug() << "Message from: " << sender.toString();
+    qDebug() << "Message port: " << senderPort;
+    qDebug() << "Message: " << buffer;
+}

myudp.h

@@ -0,0 +1,30 @@
+#ifndef MYUDP_H
+#define MYUDP_H
+
+#include <QObject>
+#include <QUdpSocket>
+
+
+class MyUDP : public QObject
+{
+    Q_OBJECT
+public:
+    explicit MyUDP(QObject *parent = 0);
+    void HelloUDP();
+    void join();
+signals:
+    void multicastChanged(QHostAddress address);
+    void packetArrived(int bellNumber);
+
+public slots:
+    void readyRead();
+    void setMulticast(QHostAddress address);
+
+public:
+    QUdpSocket *socket;
+private:
+    QHostAddress listen_address;
+
+};
+
+#endif // MYUDP_H

publisher.cpp

@@ -0,0 +1,165 @@
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+
+qmqtt/examples/qmqtt/client/example.cpp
+@KonstantinRitt
+KonstantinRitt Rename module to qmqtt
+…
+Latest commit ada0692 on Aug 21, 2018
+ History
+ 1 contributor
+132 lines (119 sloc)  4.14 KB
+
+/*
+ * example.cpp - qmqtt example
+ *
+ * Copyright (c) 2013  Ery Lee <ery.lee at gmail dot com>
+ * All rights reserved.
+ *
+ * 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 mqttc 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.
+ *
+ */
+#include <qmqtt.h>
+#include <QCoreApplication>
+#include <QTimer>
+
+const QHostAddress EXAMPLE_HOST = QHostAddress("172.16.1.254");
+const quint16 EXAMPLE_PORT = 1883;
+const QString EXAMPLE_TOPIC = "home/bell/ring";
+
+class Publisher : public QMQTT::Client
+{
+    Q_OBJECT
+public:
+    explicit Publisher(const QHostAddress& host = EXAMPLE_HOST,
+                       const quint16 port = EXAMPLE_PORT,
+                       QObject* parent = NULL)
+        : QMQTT::Client(host, port, parent)
+        , _number(0)
+    {
+        connect(this, &Publisher::connected, this, &Publisher::onConnected);
+        connect(&_timer, &QTimer::timeout, this, &Publisher::onTimeout);
+        connect(this, &Publisher::disconnected, this, &Publisher::onDisconnected);
+    }
+    virtual ~Publisher() {}
+
+    QTimer _timer;
+    quint16 _number;
+
+public slots:
+    void onConnected()
+    {
+        subscribe(EXAMPLE_TOPIC, 0);
+        _timer.start(1000);
+    }
+
+    void onTimeout()
+    {
+        QMQTT::Message message(_number, EXAMPLE_TOPIC,
+                               QString("Number is %1").arg(_number).toUtf8());
+        publish(message);
+        _number++;
+        if(_number >= 10)
+        {
+            _timer.stop();
+            disconnectFromHost();
+        }
+    }
+
+    void onDisconnected()
+    {
+        QTimer::singleShot(0, qApp, &QCoreApplication::quit);
+    }
+};
+
+class Subscriber : public QMQTT::Client
+{
+    Q_OBJECT
+public:
+    explicit Subscriber(const QHostAddress& host = EXAMPLE_HOST,
+                        const quint16 port = EXAMPLE_PORT,
+                        QObject* parent = NULL)
+        : QMQTT::Client(host, port, parent)
+        , _qout(stdout)
+    {
+        connect(this, &Subscriber::connected, this, &Subscriber::onConnected);
+        connect(this, &Subscriber::subscribed, this, &Subscriber::onSubscribed);
+        connect(this, &Subscriber::received, this, &Subscriber::onReceived);
+    }
+    virtual ~Subscriber() {}
+
+    QTextStream _qout;
+
+public slots:
+    void onConnected()
+    {
+        _qout << "connected" << endl;
+        subscribe(EXAMPLE_TOPIC, 0);
+    }
+
+    void onSubscribed(const QString& topic)
+    {
+        _qout << "subscribed " << topic << endl;
+    }
+
+    void onReceived(const QMQTT::Message& message)
+    {
+        _qout << "publish received: \"" << QString::fromUtf8(message.payload())
+              << "\"" << endl;
+    }
+};
+
+int main(int argc, char** argv)
+{
+    QCoreApplication app(argc, argv);
+    Subscriber subscriber;
+    subscriber.connectToHost();
+    Publisher publisher;
+    publisher.connectToHost();
+    return app.exec();
+}

publisher.h

@@ -0,0 +1,12 @@
+#ifndef PUBLISHER_H
+#define PUBLISHER_H
+
+#include <QObject>
+
+class Publisher
+{
+public:
+    Publisher();
+};
+
+#endif // PUBLISHER_H

subscriber.cpp

@@ -0,0 +1,50 @@
+#include "subscriber.h"
+
+
+void Subscriber::onSettingsChanged(QHostAddress _host)
+{
+    qDebug() << "Setting host:" << _host;
+    if (_host != host()) {
+        disconnect();
+        setHost(_host);
+    }
+}
+
+void Subscriber::onConnected()
+{
+    QSettings settings(QSettings::IniFormat, QSettings::UserScope,"BAD Soft", "Bell");
+
+    settings.beginGroup("Subscriber");
+
+    qDebug() << "connected";
+    subscribe(settings.value("topic",EXAMPLE_TOPIC).toString(), 0);
+
+    settings.endGroup();
+}
+
+void Subscriber::onSubscribed(const QString& topic)
+{
+    qDebug() << "subscribed " << topic;
+}
+
+void Subscriber::onReceived(const QMQTT::Message& message)
+{
+    int bellNumber;
+    QString header;
+    QString msg;
+
+    qDebug() << "publish received: " << QString::fromUtf8(message.payload());
+
+    msg = QString::fromLatin1(message.payload());
+    QStringList list1 = msg.split(QLatin1Char(':'));
+    qDebug() << msg;
+    qDebug() << "List Size: " << list1.size();
+    if (list1.size() >= 2) {
+        header = list1.at(0);
+        qDebug() << "H: " << header;
+        if (header == "BELL") {
+            bellNumber = list1.at(1).toInt();
+            emit packetArrived(bellNumber);
+        }
+    }
+}

subscriber.h

@@ -0,0 +1,47 @@
+#ifndef SUBSCRIBER_H
+#define SUBSCRIBER_H
+
+
+#include <qmqtt.h>
+#include <QTimer>
+#include <QSettings>
+
+const QHostAddress EXAMPLE_HOST = QHostAddress("172.16.1.254");
+const quint16 EXAMPLE_PORT = 1883;
+const QString EXAMPLE_TOPIC = "home/bell/ring";
+
+class Subscriber : public QMQTT::Client
+{
+    Q_OBJECT
+public:
+    explicit Subscriber(const QHostAddress& host = EXAMPLE_HOST,
+                        const quint16 port = EXAMPLE_PORT,
+                        QObject* parent = NULL)
+        : QMQTT::Client(host, port, parent)
+    {
+        QSettings settings(QSettings::IniFormat, QSettings::UserScope,"BAD Soft", "Bell");
+
+        settings.beginGroup("Subscriber");
+        setHost(QHostAddress(settings.value("address", EXAMPLE_HOST.toString()).toString()));
+        setPort(settings.value("port", EXAMPLE_PORT).toString().toInt());
+        settings.endGroup();
+
+        connect(this, &Subscriber::connected, this, &Subscriber::onConnected);
+        connect(this, &Subscriber::subscribed, this, &Subscriber::onSubscribed);
+        connect(this, &Subscriber::received, this, &Subscriber::onReceived);
+    }
+    virtual ~Subscriber() {}
+
+public slots:
+    void onConnected();
+    void onSubscribed(const QString& topic);
+    void onReceived(const QMQTT::Message& message);
+    void onSettingsChanged(QHostAddress address);
+
+signals:
+    void addressChanged(QHostAddress address);
+    void packetArrived(int bellNumber);
+
+};
+
+#endif

systray.pro

@@ -0,0 +1,20 @@
+HEADERS       = window.h \
+    subscriber.h
+SOURCES       = main.cpp \
+                subscriber.cpp \
+                window.cpp
+RESOURCES     = systray.qrc
+
+QT += widgets core multimedia
+requires(qtConfig(combobox))
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/widgets/desktop/systray
+INSTALLS += target
+
+
+win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../../../../../Devel/build-qmqtt-Desktop_Qt_5_15_0_MinGW_32_bit-Debug/lib/ -lQt5Qmqtt
+else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/../../../../../Devel/build-qmqtt-Desktop_Qt_5_15_0_MinGW_32_bit-Debug/lib/ -lQt5Qmqttd
+
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+DEPENDPATH += $$PWD/../../../../../Devel/build-qmqtt-Desktop_Qt_5_15_0_MinGW_32_bit-Debug/include

systray.pro.user

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systray.qrc

@@ -0,0 +1,11 @@
+<RCC>
+    <qresource prefix="/">
+        <file>images/bad.png</file>
+        <file>images/heart.png</file>
+        <file>images/trash.png</file>
+        <file>sounds/default_bell.wav</file>
+        <file>sounds/bell_large_gong_like_single.wav</file>
+        <file>sounds/bells_buddhist_chime.wav</file>
+        <file>images/bell-icon.png</file>
+    </qresource>
+</RCC>

window.cpp

@@ -0,0 +1,422 @@
+/****************************************************************************
+**
+** 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "window.h"
+
+#ifndef QT_NO_SYSTEMTRAYICON
+
+#include <QAction>
+#include <QSound>
+#include <QCheckBox>
+#include <QComboBox>
+#include <QCoreApplication>
+#include <QCloseEvent>
+#include <QGroupBox>
+#include <QLabel>
+#include <QLineEdit>
+#include <QMenu>
+#include <QPushButton>
+#include <QSpinBox>
+#include <QTextEdit>
+#include <QVBoxLayout>
+#include <QMessageBox>
+#include <QSettings>
+#include <QHostAddress>
+#include <QSettings>
+
+
+
+//! [0]
+Window::Window()
+{
+    createIconGroupBox();
+    createSoundGroupBox();
+    createIpGroupBox();
+    createIconGroupBox();
+    createMessageGroupBox();
+
+    iconLabel->setMinimumWidth(durationLabel->sizeHint().width());
+
+    createActions();
+    createTrayIcon();
+
+    connect(showMessageButton, &QAbstractButton::clicked, this, &Window::showMessage);
+    connect(saveSettingsButton, &QAbstractButton::clicked, this, &Window::writeSettings);
+    connect(showIconCheckBox, &QAbstractButton::toggled, trayIcon, &QSystemTrayIcon::setVisible);
+    connect(iconComboBox, QOverload<int>::of(&QComboBox::currentIndexChanged),
+            this, &Window::setIcon);
+    connect(soundComboBox, QOverload<int>::of(&QComboBox::currentIndexChanged),
+            this, &Window::playSound);
+
+    connect(trayIcon, &QSystemTrayIcon::messageClicked, this, &Window::messageClicked);
+    connect(trayIcon, &QSystemTrayIcon::activated, this, &Window::iconActivated);
+
+    QVBoxLayout *mainLayout = new QVBoxLayout;
+    mainLayout->addWidget(iconGroupBox);
+    mainLayout->addWidget(soundGroupBox);
+    mainLayout->addWidget(ipGroupBox);
+    mainLayout->addWidget(messageGroupBox);
+    setLayout(mainLayout);
+
+    iconComboBox->setCurrentIndex(1);
+    trayIcon->show();
+
+    setWindowTitle(tr("Systray"));
+    readSettings();
+
+
+}
+//! [0]
+
+void Window::writeSettings()
+{
+    qDebug() << "Write Settings";
+
+    QSettings settings(QSettings::IniFormat, QSettings::UserScope,"BAD Soft", "Bell");
+
+    settings.beginGroup("Window");
+    settings.setValue("size", size());
+    settings.setValue("pos", pos());
+    settings.setValue("sound",soundComboBox->currentIndex());
+    settings.setValue("icon",iconComboBox->currentIndex());
+    settings.setValue("type",typeComboBox->currentIndex());
+    settings.setValue("check",showIconCheckBox->checkState());
+    settings.setValue("title",titleEdit->text());
+    settings.setValue("body",bodyEdit->toPlainText());
+    settings.setValue("duration",durationSpinBox->value());
+    settings.endGroup();
+
+    settings.beginGroup("Subscriber");
+    settings.setValue("address", ipEdit->text());
+    settings.endGroup();
+}
+
+void Window::readSettings()
+{
+    QSettings settings(QSettings::IniFormat, QSettings::UserScope,"BAD Soft", "Bell");
+
+    settings.beginGroup("Window");
+    resize(settings.value("size", QSize(400, 300)).toSize());
+    move(settings.value("pos", QPoint(200, 200)).toPoint());
+    soundComboBox->setCurrentIndex(settings.value("sound",0).toUInt());
+    iconComboBox->setCurrentIndex(settings.value("icon",1).toUInt());
+    typeComboBox->setCurrentIndex(settings.value("type",0).toUInt());
+    if (settings.value("check",1).toUInt())
+      showIconCheckBox->setCheckState(Qt::Checked);
+    else
+      showIconCheckBox->setCheckState(Qt::Unchecked);
+
+    titleEdit->setText(settings.value("title",tr("Bell ringing")).toString());
+    bodyEdit->setPlainText(settings.value("body",tr("Detected Bell ringing.\nClick this balloon for details.")).toString());
+    durationSpinBox->setValue(settings.value("duration",15).toUInt());
+    settings.endGroup();
+}
+
+void Window::playSound(int index)
+{
+    QSound::play(bellResourceNames.at(index));
+}
+
+void Window::setMulticast(QHostAddress address)
+{
+
+    qDebug() << "Signal Mulitcast = " << address.toString();
+    ipEdit->setText(address.toString());
+}
+
+void Window::packetArrived(int bellNumber)
+{
+     showMessage();
+}
+
+//! [1]
+void Window::setVisible(bool visible)
+{
+    minimizeAction->setEnabled(visible);
+    maximizeAction->setEnabled(!isMaximized());
+    restoreAction->setEnabled(isMaximized() || !visible);
+    QDialog::setVisible(visible);
+}
+//! [1]
+
+//! [2]
+void Window::closeEvent(QCloseEvent *event)
+{
+#ifdef Q_OS_MACOS
+    if (!event->spontaneous() || !isVisible()) {
+        return;
+    }
+#endif
+    if (trayIcon->isVisible()) {
+        QMessageBox::information(this, tr("Systray"),
+                                 tr("The program will keep running in the "
+                                    "system tray. To terminate the program, "
+                                    "choose <b>Quit</b> in the context menu "
+                                    "of the system tray entry."));
+        hide();
+        event->ignore();
+    }
+}
+//! [2]
+
+//! [3]
+void Window::setIcon(int index)
+{
+    QIcon icon = iconComboBox->itemIcon(index);
+    trayIcon->setIcon(icon);
+    setWindowIcon(icon);
+
+    trayIcon->setToolTip(iconComboBox->itemText(index));
+}
+//! [3]
+
+
+//! [4]
+void Window::iconActivated(QSystemTrayIcon::ActivationReason reason)
+{
+    switch (reason) {
+    case QSystemTrayIcon::Trigger:
+    case QSystemTrayIcon::DoubleClick:
+        iconComboBox->setCurrentIndex((iconComboBox->currentIndex() + 1) % iconComboBox->count());
+        break;
+    case QSystemTrayIcon::MiddleClick:
+        showMessage();
+        break;
+    default:
+        ;
+    }
+}
+//! [4]
+
+//! [5]
+void Window::showMessage()
+{
+    qDebug() << "SHOW MESSAGE";
+    showIconCheckBox->setChecked(true);
+    int selectedIcon = typeComboBox->itemData(typeComboBox->currentIndex()).toInt();
+    QSystemTrayIcon::MessageIcon msgIcon = QSystemTrayIcon::MessageIcon(selectedIcon);
+
+    QSound::play(bellResourceNames.at(soundComboBox->currentIndex()));
+
+    if (selectedIcon == -1) { // custom icon
+        QIcon icon(iconComboBox->itemIcon(iconComboBox->currentIndex()));
+        trayIcon->showMessage(titleEdit->text(), bodyEdit->toPlainText(), icon,
+                          durationSpinBox->value() * 1000);
+    } else {
+        trayIcon->showMessage(titleEdit->text(), bodyEdit->toPlainText(), msgIcon,
+                          durationSpinBox->value() * 1000);
+    }
+
+    emit settingsChanged(QHostAddress(ipEdit->text()));
+}
+//! [5]
+
+//! [6]
+void Window::messageClicked()
+{
+    QMessageBox::information(nullptr, tr("Systray"),
+                             tr("Sorry, I already gave what help I could.\n"
+                                "Maybe you should try asking a human?"));
+}
+//! [6]
+
+void Window::createIconGroupBox()
+{
+    iconGroupBox = new QGroupBox(tr("Tray Icon"));
+
+    iconLabel = new QLabel("Icon:");
+
+    iconComboBox = new QComboBox;
+    iconComboBox->addItem(QIcon(":/images/bad.png"), tr("Bad"));
+    iconComboBox->addItem(QIcon(":/images/bell-icon.png"), tr("Bell"));
+    iconComboBox->addItem(QIcon(":/images/heart.png"), tr("Heart"));
+    iconComboBox->addItem(QIcon(":/images/trash.png"), tr("Trash"));
+
+    showIconCheckBox = new QCheckBox(tr("Show icon"));
+    showIconCheckBox->setChecked(true);
+
+    QHBoxLayout *iconLayout = new QHBoxLayout;
+    iconLayout->addWidget(iconLabel);
+    iconLayout->addWidget(iconComboBox);
+    iconLayout->addStretch();
+    iconLayout->addWidget(showIconCheckBox);
+    iconGroupBox->setLayout(iconLayout);
+}
+
+void Window::createSoundGroupBox()
+{
+    soundGroupBox = new QGroupBox(tr("Playing sound"));
+
+    soundLabel = new QLabel("Sound:");
+
+    soundComboBox = new QComboBox;
+    foreach (QString str, bellNames) {
+       soundComboBox->addItem(str);
+    }
+
+    QHBoxLayout *soundLayout = new QHBoxLayout;
+    soundLayout->addWidget(soundLabel);
+    soundLayout->addWidget(soundComboBox);
+    soundLayout->addStretch();
+    soundGroupBox->setLayout(soundLayout);
+
+}
+void Window::createIpGroupBox()
+{
+    ipGroupBox = new QGroupBox(tr("Adress of Mqtt server"));
+
+    ipLabel = new QLabel(tr("Address:"));
+    ipEdit = new QLineEdit("172.16.1.254");
+
+    QHBoxLayout *ipLayout = new QHBoxLayout;
+    ipLayout->addWidget(ipLabel);
+    ipLayout->addWidget(ipEdit);
+    ipLayout->addStretch();
+    ipGroupBox->setLayout(ipLayout);
+
+}
+
+QString Window::getIpAddress()
+{
+    return ipEdit->text();
+}
+
+void Window::createMessageGroupBox()
+{
+    messageGroupBox = new QGroupBox(tr("Balloon Message"));
+
+    typeLabel = new QLabel(tr("Type:"));
+
+    typeComboBox = new QComboBox;
+    typeComboBox->addItem(tr("None"), QSystemTrayIcon::NoIcon);
+    typeComboBox->addItem(style()->standardIcon(
+            QStyle::SP_MessageBoxInformation), tr("Information"),
+            QSystemTrayIcon::Information);
+    typeComboBox->addItem(style()->standardIcon(
+            QStyle::SP_MessageBoxWarning), tr("Warning"),
+            QSystemTrayIcon::Warning);
+    typeComboBox->addItem(style()->standardIcon(
+            QStyle::SP_MessageBoxCritical), tr("Critical"),
+            QSystemTrayIcon::Critical);
+    typeComboBox->addItem(QIcon(), tr("Custom icon"),
+            -1);
+    typeComboBox->setCurrentIndex(1);
+
+    durationLabel = new QLabel(tr("Duration:"));
+
+    durationSpinBox = new QSpinBox;
+    durationSpinBox->setRange(5, 60);
+    durationSpinBox->setSuffix(" s");
+    durationSpinBox->setValue(15);
+
+    durationWarningLabel = new QLabel(tr("(some systems might ignore this "
+                                         "hint)"));
+    durationWarningLabel->setIndent(10);
+
+    titleLabel = new QLabel(tr("Title:"));
+
+    titleEdit = new QLineEdit();
+
+    bodyLabel = new QLabel(tr("Body:"));
+
+    bodyEdit = new QTextEdit;
+    bodyEdit->setPlainText("");
+
+    saveSettingsButton = new QPushButton(tr("Save Settings"));
+
+    showMessageButton = new QPushButton(tr("Show Message"));
+    showMessageButton->setDefault(true);
+
+    QGridLayout *messageLayout = new QGridLayout;
+    messageLayout->addWidget(typeLabel, 0, 0);
+    messageLayout->addWidget(typeComboBox, 0, 1, 1, 2);
+    messageLayout->addWidget(durationLabel, 1, 0);
+    messageLayout->addWidget(durationSpinBox, 1, 1);
+    messageLayout->addWidget(durationWarningLabel, 1, 2, 1, 3);
+    messageLayout->addWidget(titleLabel, 2, 0);
+    messageLayout->addWidget(titleEdit, 2, 1, 1, 4);
+    messageLayout->addWidget(bodyLabel, 3, 0);
+    messageLayout->addWidget(bodyEdit, 3, 1, 2, 4);
+    messageLayout->addWidget(saveSettingsButton, 5, 3, Qt::AlignRight);
+    messageLayout->addWidget(showMessageButton, 5, 4);
+    messageLayout->setColumnStretch(3, 1);
+    messageLayout->setRowStretch(4, 1);
+    messageGroupBox->setLayout(messageLayout);
+}
+
+void Window::createActions()
+{
+    minimizeAction = new QAction(tr("Mi&nimize"), this);
+    connect(minimizeAction, &QAction::triggered, this, &QWidget::hide);
+
+    maximizeAction = new QAction(tr("Ma&ximize"), this);
+    connect(maximizeAction, &QAction::triggered, this, &QWidget::showMaximized);
+
+    restoreAction = new QAction(tr("&Restore"), this);
+    connect(restoreAction, &QAction::triggered, this, &QWidget::showNormal);
+
+    quitAction = new QAction(tr("&Quit"), this);
+    connect(quitAction, &QAction::triggered, qApp, &QCoreApplication::quit);
+}
+
+void Window::createTrayIcon()
+{
+    trayIconMenu = new QMenu(this);
+    trayIconMenu->addAction(minimizeAction);
+    trayIconMenu->addAction(maximizeAction);
+    trayIconMenu->addAction(restoreAction);
+    trayIconMenu->addSeparator();
+    trayIconMenu->addAction(quitAction);
+
+    trayIcon = new QSystemTrayIcon(this);
+    trayIcon->setContextMenu(trayIconMenu);
+}
+
+#endif

window.h

@@ -0,0 +1,153 @@
+/****************************************************************************
+**
+** 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef WINDOW_H
+#define WINDOW_H
+
+#include <QSystemTrayIcon>
+
+#ifndef QT_NO_SYSTEMTRAYICON
+
+#include <QDialog>
+#include <QSound>
+#include <QHostAddress>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+class QCheckBox;
+class QComboBox;
+class QGroupBox;
+class QLabel;
+class QLineEdit;
+class QMenu;
+class QPushButton;
+class QSpinBox;
+class QTextEdit;
+QT_END_NAMESPACE
+
+//! [0]
+class Window : public QDialog
+{
+    Q_OBJECT
+
+public:
+    Window();
+
+    void setVisible(bool visible) override;
+    QString getIpAddress();
+signals:
+    void settingsChanged(QHostAddress address);
+
+protected:
+    void closeEvent(QCloseEvent *event) override;
+
+private slots:
+    void setIcon(int index);
+    void iconActivated(QSystemTrayIcon::ActivationReason reason);
+    void showMessage();
+    void messageClicked();
+    void playSound(int index);
+
+public slots:
+    void setMulticast(QHostAddress address);
+    void packetArrived(int bellNumber);
+
+private:
+    void createIconGroupBox();
+    void createSoundGroupBox();
+    void createIpGroupBox();
+    void createMessageGroupBox();
+    void createActions();
+    void createTrayIcon();
+    void readSettings();
+    void writeSettings();
+
+    QGroupBox *iconGroupBox;
+    QLabel *iconLabel;
+    QComboBox *iconComboBox;
+    QCheckBox *showIconCheckBox;
+
+    QGroupBox *soundGroupBox;
+    QLabel *soundLabel;
+    QComboBox *soundComboBox;
+
+    QGroupBox *ipGroupBox;
+    QLabel *ipLabel;
+    QLineEdit *ipEdit;
+
+    QGroupBox *messageGroupBox;
+    QLabel *typeLabel;
+    QLabel *durationLabel;
+    QLabel *durationWarningLabel;
+    QLabel *titleLabel;
+    QLabel *bodyLabel;
+    QComboBox *typeComboBox;
+    QSpinBox *durationSpinBox;
+    QLineEdit *titleEdit;
+    QTextEdit *bodyEdit;
+    QPushButton *saveSettingsButton;
+    QPushButton *showMessageButton;
+
+    QAction *minimizeAction;
+    QAction *maximizeAction;
+    QAction *restoreAction;
+    QAction *quitAction;
+
+    QSystemTrayIcon *trayIcon;
+    QMenu *trayIconMenu;
+
+    QList<QString> bellNames{ tr("Default Bell"), tr("Buddhist Bell"), tr("Large Gong")};
+    QList<QString> bellResourceNames{":/sounds/default_bell.wav",":/sounds/bells_buddhist_chime.wav",":/sounds/bell_large_gong_like_single.wav"};
+};
+//! [0]
+
+#endif // QT_NO_SYSTEMTRAYICON
+
+#endif