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++ // Copyright (C) 2017 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "mainwindow.h"
++ #include "ui_mainwindow.h"
++
++ #include <QtCore/QDateTime>
++ #include <QtMqtt/QMqttClient>
++ #include <QtWidgets/QMessageBox>
++
++ using namespace Qt::StringLiterals;
++
++ MainWindow::MainWindow(QWidget *parent) :
++ QMainWindow(parent),
++ ui(new Ui::MainWindow)
++ {
++ ui->setupUi(this);
++
++ m_client = new QMqttClient(this);
++ m_client->setHostname(ui->lineEditHost->text());
++ m_client->setPort(static_cast<quint16>(ui->spinBoxPort->value()));
++
++ connect(m_client, &QMqttClient::stateChanged, this, &MainWindow::updateLogStateChange);
++ connect(m_client, &QMqttClient::disconnected, this, &MainWindow::brokerDisconnected);
++
++ connect(m_client, &QMqttClient::messageReceived, this, [this](const QByteArray &message, const QMqttTopicName &topic) {
++ const QString content = QDateTime::currentDateTime().toString()
++ + " Received Topic: "_L1
++ + topic.name()
++ + " Message: "_L1
++ + message
++ + u'\n';
++ ui->editLog->insertPlainText(content);
++ });
++
++ connect(m_client, &QMqttClient::pingResponseReceived, this, [this]() {
++ const QString content = QDateTime::currentDateTime().toString()
++ + "PingResponse\n"_L1;
++ ui->editLog->insertPlainText(content);
++ });
++
++ connect(ui->lineEditHost, &QLineEdit::textChanged, m_client, &QMqttClient::setHostname);
++ connect(ui->spinBoxPort, QOverload<int>::of(&QSpinBox::valueChanged), this, &MainWindow::setClientPort);
++ connect(ui->checkBoxWebSockets, &QCheckBox::checkStateChanged, this, [this](int ws) { setWebSockets(ws != 0); });
++ connect(ui->checkBoxSecure, &QCheckBox::checkStateChanged, this, [this](int s) { setSecure(s != 0); } );
++ connect(ui->comboBoxProtocol, &QComboBox::currentIndexChanged, this, [this](int p) { setProtocol(static_cast<QMqttClient::ProtocolVersion>(p + 3)); });
++ updateLogStateChange();
++ }
++
++ MainWindow::~MainWindow()
++ {
++ delete ui;
++ }
++
++ void MainWindow::on_buttonConnect_clicked()
++ {
++ if (m_client->state() == QMqttClient::Disconnected) {
++ ui->lineEditHost->setEnabled(false);
++ ui->spinBoxPort->setEnabled(false);
++ ui->buttonConnect->setText(tr("Disconnect"));
++
++ m_client->setProtocolVersion(m_protocol);
++
++ if (m_secure && m_webSockets)
++ m_client->connectToHostWebSocketEncrypted();
++ #if !defined(QT_NO_SSL) && !defined(Q_OS_WASM)
++ if (m_secure && !m_webSockets)
++ m_client->connectToHostEncrypted({});
++ #endif
++ if (!m_secure && m_webSockets)
++ m_client->connectToHostWebSocket();
++ #if !defined(Q_OS_WASM)
++ if (!m_secure && !m_webSockets)
++ m_client->connectToHost();
++ #endif
++ if (m_client->state() == QMqttClient::Disconnected) {
++ ui->lineEditHost->setEnabled(true);
++ ui->spinBoxPort->setEnabled(true);
++ ui->buttonConnect->setText(tr("Connect"));
++ m_client->disconnectFromHost();
++ }
++ } else {
++ ui->lineEditHost->setEnabled(true);
++ ui->spinBoxPort->setEnabled(true);
++ ui->buttonConnect->setText(tr("Connect"));
++ m_client->disconnectFromHost();
++ }
++ }
++
++ void MainWindow::on_buttonQuit_clicked()
++ {
++ QApplication::quit();
++ }
++
++ void MainWindow::updateLogStateChange()
++ {
++ const QString content = QDateTime::currentDateTime().toString()
++ + ": State Change"_L1
++ + QString::number(m_client->state())
++ + u'\n';
++ ui->editLog->insertPlainText(content);
++ }
++
++ void MainWindow::brokerDisconnected()
++ {
++ ui->lineEditHost->setEnabled(true);
++ ui->spinBoxPort->setEnabled(true);
++ ui->buttonConnect->setText(tr("Connect"));
++ }
++
++ void MainWindow::setClientPort(int p)
++ {
++ m_client->setPort(static_cast<quint16>(p));
++ }
++
++ void MainWindow::setSecure(bool s)
++ {
++ m_secure = s;
++ }
++
++ void MainWindow::setWebSockets(bool ws)
++ {
++ m_webSockets = ws;
++ }
++
++ void MainWindow::setProtocol(QMqttClient::ProtocolVersion p)
++ {
++ m_protocol = p;
++ }
++
++ void MainWindow::on_buttonPublish_clicked()
++ {
++ if (m_client->publish(ui->lineEditTopic->text(), ui->lineEditMessage->text().toUtf8()) == -1)
++ QMessageBox::critical(this, u"Error"_s, u"Could not publish message"_s);
++ }
++
++ void MainWindow::on_buttonSubscribe_clicked()
++ {
++ auto subscription = m_client->subscribe(ui->lineEditTopic->text());
++ if (!subscription) {
++ QMessageBox::critical(this, u"Error"_s,
++ u"Could not subscribe. Is there a valid connection?"_s);
++ return;
++ }
++ }