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++ // Copyright (C) 2018 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "mainwindow.h"
++ #include "nicselector.h"
++ #include "ui_mainwindow.h"
++
++ MainWindow::MainWindow()
++ : ui(new Ui::MainWindow)
++ {
++ ui->setupUi(this);
++
++ connect(&server, &DtlsServer::errorMessage, this, &MainWindow::addErrorMessage);
++ connect(&server, &DtlsServer::warningMessage, this, &MainWindow::addWarningMessage);
++ connect(&server, &DtlsServer::infoMessage, this, &MainWindow::addInfoMessage);
++ connect(&server, &DtlsServer::datagramReceived, this, &MainWindow::addClientMessage);
++
++ updateUi();
++ }
++
++ MainWindow::~MainWindow()
++ {
++ delete ui;
++ }
++
++ void MainWindow::on_startButton_clicked()
++ {
++ if (!server.isListening()) {
++ NicSelector ipDialog;
++ if (ipDialog.exec() == QDialog::Accepted) {
++ const QHostAddress address = ipDialog.selectedIp();
++ const quint16 port = ipDialog.selectedPort();
++ if (address.isNull()) {
++ addErrorMessage(tr("Failed to start listening, no valid address/port"));
++ } else if (server.listen(address, port)) {
++ addInfoMessage(tr("Server is listening on address %1 and port %2")
++ .arg(address.toString())
++ .arg(port));
++ }
++ }
++ } else {
++ server.close();
++ addInfoMessage(tr("Server is not accepting new connections"));
++ }
++
++ updateUi();
++ }
++
++ void MainWindow::on_quitButton_clicked()
++ {
++ QCoreApplication::exit(0);
++ }
++
++ void MainWindow::updateUi()
++ {
++ server.isListening() ? ui->startButton->setText(tr("Stop listening"))
++ : ui->startButton->setText(tr("Start listening"));
++ }
++
++ //! [0]
++ const QString colorizer(QStringLiteral("<font color=\"%1\">%2</font><br>"));
++
++ void MainWindow::addErrorMessage(const QString &message)
++ {
++ ui->serverInfo->insertHtml(colorizer.arg(QStringLiteral("Crimson"), message));
++ }
++
++ void MainWindow::addWarningMessage(const QString &message)
++ {
++ ui->serverInfo->insertHtml(colorizer.arg(QStringLiteral("DarkOrange"), message));
++ }
++
++ void MainWindow::addInfoMessage(const QString &message)
++ {
++ ui->serverInfo->insertHtml(colorizer.arg(QStringLiteral("DarkBlue"), message));
++ }
++
++ void MainWindow::addClientMessage(const QString &peerInfo, const QByteArray &datagram,
++ const QByteArray &plainText)
++ {
++ static const QString messageColor = QStringLiteral("DarkMagenta");
++ static const QString formatter = QStringLiteral("<br>---------------"
++ "<br>A message from %1"
++ "<br>DTLS datagram:<br> %2"
++ "<br>As plain text:<br> %3");
++
++ const QString html = formatter.arg(peerInfo, QString::fromUtf8(datagram.toHex(' ')),
++ QString::fromUtf8(plainText));
++ ui->messages->insertHtml(colorizer.arg(messageColor, html));
++ }
++ //! [0]