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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "chat.h"
#include "chatclient.h"
#include "chatserver.h"
#include "remoteselector.h"
#include "ui_chat.h"
#include <QDebug>
#include <QBluetoothDeviceInfo>
#include <QBluetoothLocalDevice>
#include <QBluetoothUuid>
#include <QGuiApplication>
#include <QStyleHints>
#if QT_CONFIG(permissions)
#include <QCoreApplication>
#include <QPermissions>
#include <QMessageBox>
#endif
using namespace Qt::StringLiterals;
static constexpr auto serviceUuid = "e8e10f95-1a70-4b27-9ccf-02010264e9c8"_L1;
#ifdef Q_OS_ANDROID
static constexpr auto reverseUuid = "c8e96402-0102-cf9c-274b-701a950fe1e8"_L1;
#endif
Chat::Chat(QWidget *parent)
: QDialog(parent), ui(new Ui::Chat)
{
//! [Construct UI]
ui->setupUi(this);
connect(ui->connectButton, &QPushButton::clicked, this, &Chat::connectClicked);
connect(ui->sendButton, &QPushButton::clicked, this, &Chat::sendClicked);
//! [Construct UI]
ui->connectButton->setFocus();
QStyleHints *styleHints = qGuiApp->styleHints();
updateIcons(styleHints->colorScheme());
connect(styleHints, &QStyleHints::colorSchemeChanged, this, &Chat::updateIcons);
initBluetooth();
}
Chat::~Chat()
{
qDeleteAll(clients);
delete ui;
}
void Chat::initBluetooth()
{
#if QT_CONFIG(permissions)
QBluetoothPermission permission{};
switch (qApp->checkPermission(permission)) {
case Qt::PermissionStatus::Undetermined:
qApp->requestPermission(permission, this, &Chat::initBluetooth);
return;
case Qt::PermissionStatus::Denied:
QMessageBox::warning(this, tr("Missing permissions"),
tr("Permissions are needed to use Bluetooth. "
"Please grant the permissions to this "
"application in the system settings."));
qApp->quit();
return;
case Qt::PermissionStatus::Granted:
break; // proceed to initialization
}
#endif // QT_CONFIG(permissions)
localAdapters = QBluetoothLocalDevice::allDevices();
if (localAdapters.size() < 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(localAdapters.at(0).address().toString()));
ui->secondAdapter->setText(localAdapters.at(1).address().toString());
ui->firstAdapter->setChecked(true);
connect(ui->firstAdapter, &QRadioButton::clicked, this, &Chat::newAdapterSelected);
connect(ui->secondAdapter, &QRadioButton::clicked, this, &Chat::newAdapterSelected);
}
// make discoverable
if (!localAdapters.isEmpty()) {
QBluetoothLocalDevice adapter(localAdapters.at(0).address());
adapter.setHostMode(QBluetoothLocalDevice::HostDiscoverable);
} else {
qWarning("Local adapter is not found! The application might work incorrectly.");
}
//! [Create Chat Server]
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();
//! [Create Chat Server]
//! [Get local device name]
localName = QBluetoothLocalDevice().name();
//! [Get local device name]
}
void Chat::updateIcons(Qt::ColorScheme scheme)
{
const QString bluetoothIconName = (scheme == Qt::ColorScheme::Dark) ? u"bluetooth_dark"_s
: u"bluetooth"_s;
const QString sendIconName = (scheme == Qt::ColorScheme::Dark) ? u"send_dark"_s : u"send"_s;
ui->sendButton->setIcon(QIcon::fromTheme(sendIconName));
ui->connectButton->setIcon(QIcon::fromTheme(bluetoothIconName));
}
//! [clientConnected clientDisconnected]
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));
}
//! [clientConnected clientDisconnected]
//! [connected]
void Chat::connected(const QString &name)
{
ui->chat->insertPlainText(QString::fromLatin1("Joined chat with %1.\n").arg(name));
}
//! [connected]
void Chat::newAdapterSelected()
{
const int newAdapterIndex = adapterFromUserSelection();
if (currentAdapterIndex != newAdapterIndex) {
server->stopServer();
currentAdapterIndex = newAdapterIndex;
const QBluetoothHostInfo info = localAdapters.at(currentAdapterIndex);
QBluetoothLocalDevice adapter(info.address());
adapter.setHostMode(QBluetoothLocalDevice::HostDiscoverable);
server->startServer(info.address());
localName = info.name();
}
}
int Chat::adapterFromUserSelection() const
{
int result = 0;
QBluetoothAddress newAdapter = localAdapters.at(0).address();
if (ui->secondAdapter->isChecked()) {
newAdapter = localAdapters.at(1).address();
result = 1;
}
return result;
}
void Chat::reactOnSocketError(const QString &error)
{
ui->chat->insertPlainText(QString::fromLatin1("%1\n").arg(error));
}
//! [clientDisconnected]
void Chat::clientDisconnected()
{
ChatClient *client = qobject_cast<ChatClient *>(sender());
if (client) {
clients.removeOne(client);
client->deleteLater();
}
}
//! [clientDisconnected]
//! [Connect to remote service]
void Chat::connectClicked()
{
ui->connectButton->setEnabled(false);
// scan for services
const QBluetoothAddress adapter = localAdapters.isEmpty() ?
QBluetoothAddress() :
localAdapters.at(currentAdapterIndex).address();
RemoteSelector remoteSelector(adapter);
#ifdef Q_OS_ANDROID
// QTBUG-61392
Q_UNUSED(serviceUuid);
remoteSelector.startDiscovery(QBluetoothUuid(reverseUuid));
#else
remoteSelector.startDiscovery(QBluetoothUuid(serviceUuid));
#endif
if (remoteSelector.exec() == QDialog::Accepted) {
QBluetoothServiceInfo service = remoteSelector.service();
qDebug() << "Connecting to service" << service.serviceName()
<< "on" << service.device().name();
// Create client
ChatClient *client = new ChatClient(this);
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);
client->startClient(service);
clients.append(client);
}
ui->connectButton->setEnabled(true);
}
//! [Connect to remote service]
//! [sendClicked]
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);
#if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
// avoid keyboard automatically popping up again on mobile devices
ui->sendButton->setFocus();
#else
ui->sendText->setFocus();
#endif
}
//! [sendClicked]
//! [showMessage]
void Chat::showMessage(const QString &sender, const QString &message)
{
ui->chat->moveCursor(QTextCursor::End);
ui->chat->insertPlainText(QString::fromLatin1("%1: %2\n").arg(sender, message));
ui->chat->ensureCursorVisible();
}
//! [showMessage]
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