tennis.cpp Example File

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 #include "tennis.h"

 #include <QTimer>
 #include <QKeyEvent>
 #include <QMouseEvent>

 #include <QDebug>

 #include <QSettings>
 #include <QEvent>
 #include <QResizeEvent>

 #include "tennisserver.h"
 #include "tennisclient.h"
 #include "handover.h"

 #include <qbluetooth.h>
 #include <qbluetoothdeviceinfo.h>
 #include <qbluetoothsocket.h>
 #include <qbluetoothservicediscoveryagent.h>
 #include <qbluetoothlocaldevice.h>

 #include <qnearfieldmanager.h>
 #include <qllcpserver.h>
 #include <qllcpsocket.h>

 Tennis::Tennis(QWidget *parent)
 : QDialog(parent), ui(new Ui_Tennis), board(new Board), controller(new Controller), socket(0),
   m_discoveryAgent(new QBluetoothServiceDiscoveryAgent), m_handover(0)
 {
     // start Bluetooth if not started
     QBluetoothLocalDevice *device = new QBluetoothLocalDevice();
     device->powerOn();
     delete device;
     device = 0;

     ui->setupUi(this);

     isClient = false;
     isConnected = false;
     quickDiscovery = true;

 #if defined (Q_OS_SYMBIAN) || defined(Q_OS_WINCE) || defined(Q_WS_MAEMO_5) || defined(Q_WS_MAEMO_6)
     setWindowState(Qt::WindowMaximized);
 #endif

     ui->pongView->setScene(board->getScene());

     connect(ui->pongView, SIGNAL(mouseMove(int, int)), this, SLOT(mouseMove(int, int)));
     ui->pongView->setMouseTracking(false);

     connect(board, SIGNAL(ballCollision(Board::Edge)), controller, SLOT(ballCollision(Board::Edge)));
     connect(board, SIGNAL(scored(Board::Edge)), controller, SLOT(scored(Board::Edge)));
     connect(controller, SIGNAL(moveBall(int,int)), board, SLOT(setBall(int,int)));
     connect(this, SIGNAL(moveLeftPaddle(int)), board, SLOT(setLeftPaddle(int)));
     connect(this, SIGNAL(moveRightPaddle(int)), board, SLOT(setRightPaddle(int)));
     connect(controller, SIGNAL(score(int,int)), board, SLOT(setScore(int,int)));
     connect(controller, SIGNAL(fps(const QString&)), this, SLOT(fps(const QString&)));

     setFocusPolicy(Qt::WheelFocus);

     paddle_pos = (Board::Height-12)/2-Board::Paddle/2;
     endPaddlePos = paddle_pos;

     emit moveLeftPaddle(paddle_pos);
     board->setRightPaddle(paddle_pos);

     server = new TennisServer(this);

     connect(controller, SIGNAL(moveBall(int,int)), server, SLOT(moveBall(int,int)));
     connect(controller, SIGNAL(score(int,int)), server, SLOT(score(int,int)));
     connect(this, SIGNAL(moveLeftPaddle(int)), server, SLOT(moveLeftPaddle(int)));
     connect(server, SIGNAL(clientConnected(QString)), this, SLOT(serverConnected(QString)));
     connect(server, SIGNAL(clientDisconnected(QString)), this, SLOT(serverDisconnected()));
     connect(server, SIGNAL(moveRightPaddle(int)), board, SLOT(setRightPaddle(int)));
     connect(server, SIGNAL(lag(int)), this, SLOT(lagReport(int)));

     connect(server, SIGNAL(clientConnected(QString)), controller, SLOT(refresh()));

     server->startServer();

     client = new TennisClient(this);

     connect(client, SIGNAL(moveBall(int,int)), board, SLOT(setBall(int,int)));
     connect(client, SIGNAL(moveLeftPaddle(int)), board, SLOT(setLeftPaddle(int)));
     connect(client, SIGNAL(connected(QString)), this, SLOT(clientConnected(QString)));
     connect(client, SIGNAL(disconnected()), this, SLOT(clientDisconnected()));
     connect(this, SIGNAL(moveRightPaddle(int)), client, SLOT(moveRightPaddle(int)));
     connect(client, SIGNAL(score(int,int)), board, SLOT(setScore(int,int)));
     connect(client, SIGNAL(lag(int)), this, SLOT(lagReport(int)));

     connect(this, SIGNAL(moveLeftPaddle(int)), controller, SLOT(moveLeftPaddle(int)));
     connect(this, SIGNAL(moveRightPaddle(int)), controller, SLOT(moveRightPaddle(int)));
     connect(server, SIGNAL(moveRightPaddle(int)), controller, SLOT(moveRightPaddle(int)));

 //    ui->pongView->setBackgroundBrush(QBrush(Qt::white));
     ui->pongView->setCacheMode(QGraphicsView::CacheBackground);

     QNearFieldManager nearFieldManager;
     if (nearFieldManager.isAvailable()) {
         m_handover = new Handover(server->serverPort(), this);
         connect(m_handover, SIGNAL(bluetoothServiceChanged()), this, SLOT(nearFieldHandover()));

         connect(m_discoveryAgent, SIGNAL(serviceDiscovered(QBluetoothServiceInfo)),
                 this, SLOT(serviceDiscovered(QBluetoothServiceInfo)));
         connect(m_discoveryAgent, SIGNAL(finished()), this, SLOT(discoveryFinished()));
     }

     m_discoveryAgent->setUuidFilter(QBluetoothUuid(serviceUuid));

     QString address;
     QString port;
     QStringList args = QCoreApplication::arguments();
     if(args.length() >= 2){
         address = args.at(1);
         if(args.length() >= 3){
             port = args.at(2);
         }
     }

     if(address.isEmpty()){
         QSettings settings("QtDF", "bttennis");
         address = settings.value("lastclient").toString();
     }

     if(!address.isEmpty()){
         qDebug() << "Connect to" << address << port;
         QBluetoothDeviceInfo device = QBluetoothDeviceInfo(QBluetoothAddress(address), "", QBluetoothDeviceInfo::ComputerDevice);
         QBluetoothServiceInfo service;
         if (!port.isEmpty()) {
             QBluetoothServiceInfo::Sequence protocolDescriptorList;
             QBluetoothServiceInfo::Sequence protocol;
             protocol << QVariant::fromValue(QBluetoothUuid(QBluetoothUuid::L2cap))
                      << QVariant::fromValue(port.toUShort());
             protocolDescriptorList.append(QVariant::fromValue(protocol));
             service.setAttribute(QBluetoothServiceInfo::ProtocolDescriptorList,
                                  protocolDescriptorList);
             qDebug() << "port" << port.toUShort() << service.protocolServiceMultiplexer();
         }
         else {
             service.setServiceUuid(QBluetoothUuid(serviceUuid));
         }
         service.setDevice(device);
         client->startClient(service);
         board->setStatus("Connecting", 100, 25);
     } else if (nearFieldManager.isAvailable()) {
         board->setStatus(tr("Touch to play"), 100, 25);
     }

     setEnabled(true);

     paddleAnimation = new QPropertyAnimation(this, "paddlePos", this);
     paddleAnimation->setEasingCurve(QEasingCurve::InOutQuad);

     ui->pongView->installEventFilter(this);

 }

 Tennis::~Tennis()
 {
 }

 void Tennis::keyPressEvent(QKeyEvent *event)
 {
     if(event->matches(QKeySequence::MoveToNextLine)) {
         moveDown();
     }
     else if(event->matches(QKeySequence::MoveToPreviousLine)){
         moveUp();
     }
 }

 void Tennis::wheelEvent(QWheelEvent *event)
 {
     if(event->delta() > 0){
         moveUp();
     }
     else {
         moveDown();
     }
 }

 void Tennis::moveUp(int px)
 {
     endPaddlePos -= px;
     if(endPaddlePos <= 0)
         endPaddlePos = 0;
     move(endPaddlePos);
 }

 void Tennis::moveDown(int px)
 {
     endPaddlePos += px;
     if(endPaddlePos > Board::Height-Board::Paddle-24)
         endPaddlePos = Board::Height-Board::Paddle-24;
     move(endPaddlePos);

 }

 void Tennis::move(int px)
 {
     int distance = abs(paddle_pos - endPaddlePos);

     paddleAnimation->stop();
     paddleAnimation->setStartValue(paddle_pos);
     paddleAnimation->setEndValue(px);
     paddleAnimation->setDuration((1000*distance)/350);
     paddleAnimation->start();
 }

 void Tennis::setPaddlePos(int p)
 {
     paddle_pos = p;
     if(isClient)
         emit moveRightPaddle(paddle_pos);
     else
         emit moveLeftPaddle(paddle_pos);
 }

 void Tennis::mouseMove(int x, int y)
 {
     if(isConnected == false){
         // look for clicks in the bt connect icon
         if(x > 440 && x < 540 && y > 200 && y < 300) {
             qDebug() << "Got connect click!";
             if(m_discoveryAgent->isActive()) {
                 qDebug() << "stopping!";
                 m_discoveryAgent->stop();
                 board->animateConnect(false);
             }
             else {
                 qDebug() << "starting!";
                 startDiscovery();
             }
         }

     }
     y-=12+Board::Paddle/2;
     if(y <= 0)
         y = 0;
     else if(y > Board::Height-Board::Paddle-24)
         y = Board::Height-Board::Paddle-24;

     endPaddlePos = y;
     move(y);
 }

 void Tennis::clientConnected(const QString &name)
 {
     board->setStatus("Connected to " + name, 100, 0);
     controller->stop();
     server->stopServer();
     isClient = true;
     isConnected = true;
     board->animateConnect(false);
     board->fadeConnect(true);
     emit moveRightPaddle(paddle_pos);
 }

 void Tennis::clientDisconnected()
 {
     board->setStatus("Disconnect", 100, 25);
     controller->start();
     server->startServer();
     client->stopClient();
     isClient = false;
     isConnected = false;
     discoveryFinished();
 }

 void Tennis::serverConnected(const QString &name)
 {
     board->setStatus("Server for " + name, 100, 0);
     m_discoveryAgent->stop();
     isConnected = true;
     board->animateConnect(false);
     board->fadeConnect(true);
     emit moveLeftPaddle(paddle_pos);
 }

 void Tennis::serverDisconnected()
 {
     board->setStatus("Disconnected", 100, 25);
     isConnected = false;
     discoveryFinished();
 }

 void Tennis::serviceDiscovered(const QBluetoothServiceInfo &serviceInfo)
 {
     qDebug() << "***** Discovered! " << serviceInfo.device().name() << serviceInfo.serviceName() << serviceInfo.serviceUuid();
     qDebug() << "Found one!" << serviceInfo.protocolServiceMultiplexer();
     m_discoveryAgent->stop();
     client->startClient(serviceInfo);
     QSettings settings("QtDF", "bttennis");
     settings.setValue("lastclient", serviceInfo.device().address().toString());
 }

 void Tennis::discoveryFinished()
 {
     if(!m_discoveryAgent->isActive()) {
         if(!isConnected) {
             board->setStatus("Waiting", 100, 25);
     //        QTimer::singleShot(60000, this, SLOT(startDiscovery()));
             board->animateConnect(false);
             board->fadeConnect(false);
        }
     }
 }

 void Tennis::startDiscovery()
 {
     qDebug() << "startDiscovery() called";
     if(!isConnected) {
         qDebug() << "Scanning!";
         board->setStatus("Scanning", 100, 25);
         board->fadeConnect(false);
         board->animateConnect(true);
         m_discoveryAgent->start(QBluetoothServiceDiscoveryAgent::MinimalDiscovery);
 //        if(quickDiscovery)
 //            m_discoveryAgent->start(QBluetoothServiceDiscoveryAgent::MinimalDiscovery);
 //        else
 //            m_discoveryAgent->start(QBluetoothServiceDiscoveryAgent::FullDiscovery);
 //        quickDiscovery = !quickDiscovery;
     }
     else {
         qDebug() << "Stop scanning!";
         board->setStatus("", 0, 0);
         board->animateConnect(false);
         board->fadeConnect(true);
     }
 }

 void Tennis::resizeEvent(QResizeEvent *re)
 {
     if(re->oldSize().height() > 0){
         qreal x, y;
         x = (re->size().width())/qreal(re->oldSize().width());
         y = (re->size().height())/qreal(re->oldSize().height());
         ui->pongView->scale(x, y);
     }
     ui->pongView->resize(re->size());
 }

 void Tennis::lagReport(int ms)
 {
     if(ms > 250){
         board->setStatus(QString("Caution Lag %1ms").arg(ms), 100, 0);
     }
 }

 void Tennis::nearFieldHandover()
 {
     qDebug() << "Connecting to NFC provided address" << m_handover->bluetoothAddress().toString();

     QBluetoothDeviceInfo device = QBluetoothDeviceInfo(m_handover->bluetoothAddress(), QString(),
                                                        QBluetoothDeviceInfo::ComputerDevice);

     QBluetoothServiceInfo service;
     service.setServiceUuid(QBluetoothUuid(serviceUuid));
     service.setDevice(device);

     QBluetoothServiceInfo::Sequence protocolDescriptorList;
     QBluetoothServiceInfo::Sequence protocol;
     protocol << QVariant::fromValue(QBluetoothUuid(QBluetoothUuid::L2cap))
              << QVariant::fromValue(m_handover->serverPort());
     protocolDescriptorList.append(QVariant::fromValue(protocol));
     service.setAttribute(QBluetoothServiceInfo::ProtocolDescriptorList,
                          protocolDescriptorList);

     client->startClient(service);
     board->setStatus(tr("Connecting: %1 %2").arg(m_handover->bluetoothAddress().toString()).arg(m_handover->serverPort()), 100, 25);
 }

 void Tennis::fps(const QString &f)
 {
   board->setStatus(f, 100, 100);
 }