qtconnectivity/examples/bluetooth/btchat/chat.cpp

/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtBluetooth module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "chat.h"
#include "remoteselector.h"
#include "chatserver.h"
#include "chatclient.h"

#include <qbluetoothuuid.h>
#include <qbluetoothserver.h>
#include <qbluetoothservicediscoveryagent.h>
#include <qbluetoothdeviceinfo.h>
#include <qbluetoothlocaldevice.h>

#ifdef Q_OS_ANDROID
#include <QtAndroidExtras/QtAndroid>
#endif

#include <QTimer>

#include <QDebug>

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),  currentAdapterIndex(0), ui(new Ui_Chat)
{
    //! [Construct UI]
    ui->setupUi(this);

    connect(ui->quitButton, SIGNAL(clicked()), this, SLOT(accept()));
    connect(ui->connectButton, SIGNAL(clicked()), this, SLOT(connectClicked()));
    connect(ui->sendButton, SIGNAL(clicked()), this, SLOT(sendClicked()));
    //! [Construct UI]

    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(localAdapters.at(0).address().toString()));
        ui->secondAdapter->setText(localAdapters.at(1).address().toString());
        ui->firstAdapter->setChecked(true);
        connect(ui->firstAdapter, SIGNAL(clicked()), this, SLOT(newAdapterSelected()));
        connect(ui->secondAdapter, SIGNAL(clicked()), this, SLOT(newAdapterSelected()));
        QBluetoothLocalDevice adapter(localAdapters.at(0).address());
        adapter.setHostMode(QBluetoothLocalDevice::HostDiscoverable);
    }

    //! [Create Chat Server]
    server = new ChatServer(this);
    connect(server, SIGNAL(clientConnected(QString)), this, SLOT(clientConnected(QString)));
    connect(server, SIGNAL(clientDisconnected(QString)), this, SLOT(clientDisconnected(QString)));
    connect(server, SIGNAL(messageReceived(QString,QString)),
            this, SLOT(showMessage(QString,QString)));
    connect(this, SIGNAL(sendMessage(QString)), server, SLOT(sendMessage(QString)));
    server->startServer();
    //! [Create Chat Server]

    //! [Get local device name]
    localName = QBluetoothLocalDevice().name();
    //! [Get local device name]
}

Chat::~Chat()
{
    qDeleteAll(clients);
    delete server;
}

//! [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));
}

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;
}
//! [connected]

//! [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
    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, SIGNAL(messageReceived(QString,QString)),
                this, SLOT(showMessage(QString,QString)));
        connect(client, SIGNAL(disconnected()), this, SLOT(clientDisconnected()));
        connect(client, SIGNAL(connected(QString)), this, SLOT(connected(QString)));
        connect(this, SIGNAL(sendMessage(QString)), client, SLOT(sendMessage(QString)));
qDebug() << "Start client";
        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);
}
//! [sendClicked]

//! [showMessage]
void Chat::showMessage(const QString &sender, const QString &message)
{
    ui->chat->insertPlainText(QString::fromLatin1("%1: %2\n").arg(sender, message));
    ui->chat->ensureCursorVisible();
}
//! [showMessage]