Qt 5.7 | Qt Bluetooth | Bluetooth Chat Example | remoteselector.cpp Example File

Qt 5.7.1 Reference Documentation

# remoteselector.cpp Example File

btchat/remoteselector.cpp

      /****************************************************************************
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      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
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      ** This file is part of the QtBluetooth module of the Qt Toolkit.
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      ** $QT_BEGIN_LICENSE:BSD$
      ** You may use this file under the terms of the BSD license as follows:
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      #include "remoteselector.h"
      #include "ui_remoteselector.h"

      #include <qbluetoothdeviceinfo.h>
      #include <qbluetoothaddress.h>
      #include <qbluetoothlocaldevice.h>

      QT_USE_NAMESPACE

      RemoteSelector::RemoteSelector(const QBluetoothAddress &localAdapter, QWidget *parent)
      :   QDialog(parent), ui(new Ui::RemoteSelector)
      {
          ui->setupUi(this);

          m_discoveryAgent = new QBluetoothServiceDiscoveryAgent(localAdapter);

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

      RemoteSelector::~RemoteSelector()
      {
          delete ui;
          delete m_discoveryAgent;
      }

      void RemoteSelector::startDiscovery(const QBluetoothUuid &uuid)
      {
          ui->status->setText(tr("Scanning..."));
          if (m_discoveryAgent->isActive())
              m_discoveryAgent->stop();

          ui->remoteDevices->clear();

          m_discoveryAgent->setUuidFilter(uuid);
          m_discoveryAgent->start(QBluetoothServiceDiscoveryAgent::FullDiscovery);

      }

      void RemoteSelector::stopDiscovery()
      {
          if (m_discoveryAgent){
              m_discoveryAgent->stop();
          }
      }

      QBluetoothServiceInfo RemoteSelector::service() const
      {
          return m_service;
      }

      void RemoteSelector::serviceDiscovered(const QBluetoothServiceInfo &serviceInfo)
      {
      #if 0
          qDebug() << "Discovered service on"
                   << serviceInfo.device().name() << serviceInfo.device().address().toString();
          qDebug() << "\tService name:" << serviceInfo.serviceName();
          qDebug() << "\tDescription:"
                   << serviceInfo.attribute(QBluetoothServiceInfo::ServiceDescription).toString();
          qDebug() << "\tProvider:"
                   << serviceInfo.attribute(QBluetoothServiceInfo::ServiceProvider).toString();
          qDebug() << "\tL2CAP protocol service multiplexer:"
                   << serviceInfo.protocolServiceMultiplexer();
          qDebug() << "\tRFCOMM server channel:" << serviceInfo.serverChannel();
      #endif
          QMapIterator<QListWidgetItem *, QBluetoothServiceInfo> i(m_discoveredServices);
          while (i.hasNext()){
              i.next();
              if (serviceInfo.device().address() == i.value().device().address()){
                  return;
              }
          }

          QString remoteName;
          if (serviceInfo.device().name().isEmpty())
              remoteName = serviceInfo.device().address().toString();
          else
              remoteName = serviceInfo.device().name();

          QListWidgetItem *item =
              new QListWidgetItem(QString::fromLatin1("%1 %2").arg(remoteName,
                                                                   serviceInfo.serviceName()));

          m_discoveredServices.insert(item, serviceInfo);
          ui->remoteDevices->addItem(item);
      }

      void RemoteSelector::discoveryFinished()
      {
          ui->status->setText(tr("Select the chat service to connect to."));
      }

      void RemoteSelector::on_remoteDevices_itemActivated(QListWidgetItem *item)
      {
          qDebug() << "got click" << item->text();
          m_service = m_discoveredServices.value(item);
          if (m_discoveryAgent->isActive())
              m_discoveryAgent->stop();

          accept();
      }

      void RemoteSelector::on_cancelButton_clicked()
      {
          reject();
      }