chat.cpp Example File

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#include "chat.h" #include "remoteselector.h" #include "chatserver.h" #include "chatclient.h" #include <QtCore/qdebug.h> #include <QtBluetooth/qbluetoothdeviceinfo.h> #include <QtBluetooth/qbluetoothlocaldevice.h> #include <QtBluetooth/qbluetoothuuid.h> #ifdef Q_OS_ANDROID #include <QtAndroidExtras/QtAndroid> #endif static const QLatin1String serviceUuid("e8e10f95-1a70-4b27-9ccf-02010264e9c8"); #ifdef Q_OS_ANDROID static const QLatin1String reverseUuid("c8e96402-0102-cf9c-274b-701a950fe1e8"); #endif Chat::Chat(QWidget *parent) : QDialog(parent), ui(new Ui_Chat) { ui->setupUi(this); connect(ui->quitButton, &QPushButton::clicked, this, &Chat::accept); connect(ui->connectButton, &QPushButton::clicked, this, &Chat::connectClicked); connect(ui->sendButton, &QPushButton::clicked, this, &Chat::sendClicked); localAdapters = QBluetoothLocalDevice::allDevices(); if (localAdapters.count() < 2) { ui->localAdapterBox->setVisible(false); } else { //we ignore more than two adapters ui->localAdapterBox->setVisible(true); ui->firstAdapter->setText(tr("Default (%1)", "%1 = Bluetooth address"). arg(; ui->secondAdapter->setText(; ui->firstAdapter->setChecked(true); connect(ui->firstAdapter, &QRadioButton::clicked, this, &Chat::newAdapterSelected); connect(ui->secondAdapter, &QRadioButton::clicked, this, &Chat::newAdapterSelected); QBluetoothLocalDevice adapter(; adapter.setHostMode(QBluetoothLocalDevice::HostDiscoverable); } server = new ChatServer(this); connect(server, QOverload<const QString &>::of(&ChatServer::clientConnected), this, &Chat::clientConnected); connect(server, QOverload<const QString &>::of(&ChatServer::clientDisconnected), this, QOverload<const QString &>::of(&Chat::clientDisconnected)); connect(server, &ChatServer::messageReceived, this, &Chat::showMessage); connect(this, &Chat::sendMessage, server, &ChatServer::sendMessage); server->startServer(); localName = QBluetoothLocalDevice().name(); } Chat::~Chat() { qDeleteAll(clients); delete server; } void Chat::clientConnected(const QString &name) { ui->chat->insertPlainText(QString::fromLatin1("%1 has joined chat.\n").arg(name)); } void Chat::clientDisconnected(const QString &name) { ui->chat->insertPlainText(QString::fromLatin1("%1 has left.\n").arg(name)); } void Chat::connected(const QString &name) { ui->chat->insertPlainText(QString::fromLatin1("Joined chat with %1.\n").arg(name)); } void Chat::newAdapterSelected() { const int newAdapterIndex = adapterFromUserSelection(); if (currentAdapterIndex != newAdapterIndex) { server->stopServer(); currentAdapterIndex = newAdapterIndex; const QBluetoothHostInfo info =; QBluetoothLocalDevice adapter(info.address()); adapter.setHostMode(QBluetoothLocalDevice::HostDiscoverable); server->startServer(info.address()); localName =; } } int Chat::adapterFromUserSelection() const { int result = 0; QBluetoothAddress newAdapter =; if (ui->secondAdapter->isChecked()) { newAdapter =; result = 1; } return result; } void Chat::reactOnSocketError(const QString &error) { ui->chat->insertPlainText(error); } void Chat::clientDisconnected() { ChatClient *client = qobject_cast<ChatClient *>(sender()); if (client) { clients.removeOne(client); client->deleteLater(); } } void Chat::connectClicked() { ui->connectButton->setEnabled(false); // scan for services const QBluetoothAddress adapter = localAdapters.isEmpty() ? QBluetoothAddress() :; RemoteSelector remoteSelector(adapter); #ifdef Q_OS_ANDROID if (QtAndroid::androidSdkVersion() >= 23) remoteSelector.startDiscovery(QBluetoothUuid(reverseUuid)); else remoteSelector.startDiscovery(QBluetoothUuid(serviceUuid)); #else remoteSelector.startDiscovery(QBluetoothUuid(serviceUuid)); #endif if (remoteSelector.exec() == QDialog::Accepted) { QBluetoothServiceInfo service = remoteSelector.service(); qDebug() << "Connecting to service 2" << service.serviceName() << "on" << service.device().name(); // Create client qDebug() << "Going to create client"; ChatClient *client = new ChatClient(this); qDebug() << "Connecting..."; connect(client, &ChatClient::messageReceived, this, &Chat::showMessage); connect(client, &ChatClient::disconnected, this, QOverload<>::of(&Chat::clientDisconnected)); connect(client, QOverload<const QString &>::of(&ChatClient::connected), this, &Chat::connected); connect(client, &ChatClient::socketErrorOccurred, this, &Chat::reactOnSocketError); connect(this, &Chat::sendMessage, client, &ChatClient::sendMessage); qDebug() << "Start client"; client->startClient(service); clients.append(client); } ui->connectButton->setEnabled(true); } void Chat::sendClicked() { ui->sendButton->setEnabled(false); ui->sendText->setEnabled(false); showMessage(localName, ui->sendText->text()); emit sendMessage(ui->sendText->text()); ui->sendText->clear(); ui->sendText->setEnabled(true); ui->sendButton->setEnabled(true); } void Chat::showMessage(const QString &sender, const QString &message) { ui->chat->insertPlainText(QString::fromLatin1("%1: %2\n").arg(sender, message)); ui->chat->ensureCursorVisible(); }

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