chat.cpp Example File

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  #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>

  #include <QTimer>

  #include <QDebug>

  static const QLatin1String serviceUuid("e8e10f95-1a70-4b27-9ccf-02010264e9c8");

  Chat::Chat(QWidget *parent)
      : QDialog(parent),  currentAdapterIndex(0), ui(new Ui_Chat)
  {
      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()));

      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);
      }

      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();

      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 = 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::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() :
                                             localAdapters.at(currentAdapterIndex).address();

      RemoteSelector remoteSelector(adapter);
      remoteSelector.startDiscovery(QBluetoothUuid(serviceUuid));
      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);
  }

  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();
  }