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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include <QApplication>
++ #include <QInputDialog>
++ #include <QMessageBox>
++
++ #include "chat.h"
++ #include "chat_adaptor.h"
++ #include "chat_interface.h"
++
++ ChatMainWindow::ChatMainWindow()
++ {
++ setupUi(this);
++
++ connect(messageLineEdit, &QLineEdit::textChanged, this,
++ [this](const QString &newText) { sendButton->setEnabled(!newText.isEmpty()); });
++ connect(sendButton, &QPushButton::clicked, this, [this]() {
++ emit message(m_nickname, messageLineEdit->text());
++ messageLineEdit->clear();
++ });
++ connect(actionChangeNickname, &QAction::triggered,
++ this, &ChatMainWindow::changeNickname);
++ connect(actionAboutQt, &QAction::triggered, this, [this]() { QMessageBox::aboutQt(this); });
++ connect(qApp, &QApplication::lastWindowClosed, this,
++ [this]() { emit action(m_nickname, tr("leaves the chat")); });
++
++ // add our D-Bus interface and connect to D-Bus
++ new ChatAdaptor(this);
++
++ auto connection = QDBusConnection::sessionBus();
++ connection.registerObject("/", this);
++
++ using org::example::chat;
++
++ auto *iface = new chat({}, {}, connection, this);
++ connect(iface, &chat::message, this, [this](const QString &nickname, const QString &text) {
++ displayMessage(tr("<%1> %2").arg(nickname, text));
++ });
++ connect(iface, &chat::action, this, [this](const QString &nickname, const QString &text) {
++ displayMessage(tr("* %1 %2").arg(nickname, text));
++ });
++
++ if (!changeNickname(true))
++ QMetaObject::invokeMethod(qApp, &QApplication::quit, Qt::QueuedConnection);
++ }
++
++ void ChatMainWindow::displayMessage(const QString &message)
++ {
++ m_messages.append(message);
++
++ if (m_messages.count() > 100)
++ m_messages.removeFirst();
++
++ auto history = m_messages.join(QLatin1String("\n"));
++ chatHistory->setPlainText(history);
++ }
++
++ bool ChatMainWindow::changeNickname(bool initial)
++ {
++ auto newNickname = QInputDialog::getText(this, tr("Set nickname"), tr("New nickname:"));
++ newNickname = newNickname.trimmed();
++
++ if (!newNickname.isEmpty()) {
++ auto old = m_nickname;
++ m_nickname = newNickname;
++
++ if (initial)
++ emit action(m_nickname, tr("joins the chat"));
++ else
++ emit action(old, tr("is now known as %1").arg(m_nickname));
++ return true;
++ }
++
++ return false;
++ }
++
++ int main(int argc, char **argv)
++ {
++ QApplication app(argc, argv);
++
++ if (!QDBusConnection::sessionBus().isConnected()) {
++ qWarning("Cannot connect to the D-Bus session bus.\n"
++ "Please check your system settings and try again.\n");
++ return 1;
++ }
++
++ ChatMainWindow chat;
++ chat.show();
++ return app.exec();
++ }