device.cpp Example File

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 #include "device.h"
 #include "service.h"

 #include <qbluetoothaddress.h>
 #include <qbluetoothdevicediscoveryagent.h>
 #include <qbluetoothlocaldevice.h>
 #include <QMenu>
 #include <QDebug>

 DeviceDiscoveryDialog::DeviceDiscoveryDialog(QWidget *parent)
 :   QDialog(parent), discoveryAgent(new QBluetoothDeviceDiscoveryAgent),
     localDevice(new QBluetoothLocalDevice),
     ui(new Ui_DeviceDiscovery)
 {
     ui->setupUi(this);

 #if defined(Q_OS_WINCE) || defined(Q_WS_MAEMO_6)
     setWindowState(Qt::WindowFullScreen);
 #endif

     connect(ui->inquiryType, SIGNAL(toggled(bool)), this, SLOT(setGeneralUnlimited(bool)));
     connect(ui->scan, SIGNAL(clicked()), this, SLOT(startScan()));

     connect(discoveryAgent, SIGNAL(deviceDiscovered(const QBluetoothDeviceInfo&)),
             this, SLOT(addDevice(const QBluetoothDeviceInfo&)));
     connect(discoveryAgent, SIGNAL(finished()), this, SLOT(scanFinished()));

     connect(ui->list, SIGNAL(itemActivated(QListWidgetItem*)),
             this, SLOT(itemActivated(QListWidgetItem*)));

     connect(localDevice, SIGNAL(hostModeStateChanged(QBluetoothLocalDevice::HostMode)),
             this, SLOT(hostModeStateChanged(QBluetoothLocalDevice::HostMode)));

     hostModeStateChanged(localDevice->hostMode());
     // add context menu for devices to be able to pair device
     ui->list->setContextMenuPolicy(Qt::CustomContextMenu);
     connect(ui->list, SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(displayPairingMenu(QPoint)));
     connect(localDevice, SIGNAL(pairingFinished(const QBluetoothAddress&, QBluetoothLocalDevice::Pairing))
         , this, SLOT(pairingDone(const QBluetoothAddress&, QBluetoothLocalDevice::Pairing)));

 }

 DeviceDiscoveryDialog::~DeviceDiscoveryDialog()
 {
     delete discoveryAgent;
 }

 void DeviceDiscoveryDialog::addDevice(const QBluetoothDeviceInfo &info)
 {
     QString label = QString("%1 %2").arg(info.address().toString()).arg(info.name());
     QList<QListWidgetItem *> items = ui->list->findItems(label, Qt::MatchExactly);
     if (items.empty()) {
         QListWidgetItem *item = new QListWidgetItem(label);
         QBluetoothLocalDevice::Pairing pairingStatus = localDevice->pairingStatus(info.address());
         if (pairingStatus == QBluetoothLocalDevice::Paired || pairingStatus == QBluetoothLocalDevice::AuthorizedPaired )
             item->setTextColor(QColor(Qt::green));
         else
             item->setTextColor(QColor(Qt::black));

         ui->list->addItem(item);
     }

 }

 void DeviceDiscoveryDialog::startScan()
 {
     discoveryAgent->start();
     ui->scan->setEnabled(false);
     ui->inquiryType->setEnabled(false);
 }

 void DeviceDiscoveryDialog::scanFinished()
 {
     ui->scan->setEnabled(true);
     ui->inquiryType->setEnabled(true);
 }

 void DeviceDiscoveryDialog::setGeneralUnlimited(bool unlimited)
 {
     if (unlimited)
         discoveryAgent->setInquiryType(QBluetoothDeviceDiscoveryAgent::GeneralUnlimitedInquiry);
     else
         discoveryAgent->setInquiryType(QBluetoothDeviceDiscoveryAgent::LimitedInquiry);
 }

 void DeviceDiscoveryDialog::itemActivated(QListWidgetItem *item)
 {
     QString text = item->text();

     int index = text.indexOf(' ');

     if (index == -1)
         return;

     QBluetoothAddress address(text.left(index));
     QString name(text.mid(index + 1));

     ServiceDiscoveryDialog d(name, address);
     d.exec();
 }

 void DeviceDiscoveryDialog::on_discoverable_clicked(bool clicked)
 {
     if (clicked)
         localDevice->setHostMode(QBluetoothLocalDevice::HostDiscoverable);
     else
         localDevice->setHostMode(QBluetoothLocalDevice::HostConnectable);
 }

 void DeviceDiscoveryDialog::on_power_clicked(bool clicked)
 {
     if (clicked)
         localDevice->powerOn();
     else
         localDevice->setHostMode(QBluetoothLocalDevice::HostPoweredOff);
 }

 void DeviceDiscoveryDialog::hostModeStateChanged(QBluetoothLocalDevice::HostMode mode)
 {
     if (mode != QBluetoothLocalDevice::HostPoweredOff)
         ui->power->setChecked(true);
     else
        ui->power->setChecked( false);

     if (mode == QBluetoothLocalDevice::HostDiscoverable)
         ui->discoverable->setChecked(true);
     else
         ui->discoverable->setChecked(false);

     bool on = !(mode == QBluetoothLocalDevice::HostPoweredOff);

     ui->scan->setEnabled(on);
     ui->discoverable->setEnabled(on);
 }
 void DeviceDiscoveryDialog::displayPairingMenu(const QPoint &pos)
 {
     QMenu menu(this);
     QAction *pairAction = menu.addAction("Pair");
     QAction *removePairAction = menu.addAction("Remove Pairing");
     QAction *chosenAction = menu.exec(ui->list->viewport()->mapToGlobal(pos));
     QListWidgetItem *currentItem = ui->list->currentItem();

     QString text = currentItem->text();
     int index = text.indexOf(' ');
     if (index == -1)
         return;

     QBluetoothAddress address (text.left(index));
     if (chosenAction == pairAction) {
         localDevice->requestPairing(address, QBluetoothLocalDevice::Paired);
     } else if (chosenAction == removePairAction) {
         localDevice->requestPairing(address, QBluetoothLocalDevice::Unpaired);
     }
 }
 void DeviceDiscoveryDialog::pairingDone(const QBluetoothAddress &address, QBluetoothLocalDevice::Pairing pairing)
 {
     QList<QListWidgetItem *> items = ui->list->findItems(address.toString(), Qt::MatchContains);

     if (pairing == QBluetoothLocalDevice::Paired || pairing == QBluetoothLocalDevice::AuthorizedPaired ) {
         for (int var = 0; var < items.count(); ++var) {
             QListWidgetItem *item = items.at(var);
             item->setTextColor(QColor(Qt::green));
         }
     } else {
         for (int var = 0; var < items.count(); ++var) {
             QListWidgetItem *item = items.at(var);
             item->setTextColor(QColor(Qt::red));
         }
     }
 }