Topic #6: Device selection UI

initial messages not restored

Author:     user1
Created:    03/18/11 03:18:26

I’ve written a Qt wrapper that shows the standard bluetooth selecion UI on Symbian. Where to place it? As the private implementation of the QBtSingleDeviceSelectorUI ?

Luis Hi Luis, I woul like to have that code, because I need that option in my app. If can explain me how to get a Bt device selection native symbian window by pressing a QPushButton and get the device address back. I know something about Qt but a zero in Symbian C++. So please help me regarding this.

Author:     favoritas37
Created:    03/18/11 11:04:14

Hello user1.

QBtSingleDeviceSelectorUI is part of the library so you can find any information needed from the [http://www.csd.uoc.gr/~ftylitak/QBluetooth_repo_doc/class_q_bt_single_device_selector_u_i.html documentation page].

Here i wrote for you a working [https://projects.forum.nokia.com/qbluetooth/files/DeviceDiscovereNativeUI.zip example of how to use it]. It is a ready project so copy the QBluetooth binaries to your S60 SDK epoc root folder (as discribed [https://projects.forum.nokia.com/qbluetooth/wiki/binaries here]), compile the project and you are ready.

Here follows the code of the project for a quick look:

DeviceDiscovereNativeUI.h

#ifndef DEVICEDISCOVERENATIVEUI_H
#define DEVICEDISCOVERENATIVEUI_H

#include <QtGui/QMainWindow>
#include "ui_DeviceDiscovereNativeUI.h"
#include <QBluetooth.h>

class DeviceDiscovereNativeUI : public QMainWindow
{
    Q_OBJECT

public:
        DeviceDiscovereNativeUI(QWidget *parent = 0);
    ~DeviceDiscovereNativeUI();

public slots:
        void startDiscovery();
        void discoveryCompletedHandle(const QBtDevice &selectedDevice);

private:
    Ui::DeviceDiscovereNativeUI ui;
    QBtSingleDeviceSelectorUI* discoveryUI;
};

#endif // DEVICEDISCOVERENATIVEUI_H

DeviceDiscovereNativeUI.cpp

#include "DeviceDiscovereNativeUI.h"

DeviceDiscovereNativeUI::DeviceDiscovereNativeUI(QWidget *parent)
    : QMainWindow(parent)
{
        ui.setupUi(this);

        connect(ui.startButton, SIGNAL(clicked()),
                        this, SLOT(startDiscovery()));
}

DeviceDiscovereNativeUI::~DeviceDiscovereNativeUI()
{
        if(discoveryUI)
                delete discoveryUI;
}

void DeviceDiscovereNativeUI::startDiscovery()
{
        discoveryUI = new QBtSingleDeviceSelectorUI();
        connect(discoveryUI, SIGNAL(discoveryCompleted (const QBtDevice &)),
                        this, SLOT(discoveryCompletedHandle(const QBtDevice &)));
        discoveryUI->show();
}

void DeviceDiscovereNativeUI::discoveryCompletedHandle(const QBtDevice &selectedDevice)
{
        ui.console->setText("Selected device: " + selectedDevice.getName());
}

DeviceDiscovereNativeUI.pro

TEMPLATE = app
TARGET = DeviceDiscovereNativeUI

QT        += core \
    gui

HEADERS   += DeviceDiscovereNativeUI.h
SOURCES   += DeviceDiscovereNativeUI_reg.rss \
    main.cpp \
    DeviceDiscovereNativeUI.cpp
FORMS     += DeviceDiscovereNativeUI.ui
RESOURCES +=

symbian{
        TARGET.UID3 = 0xE9935288
       INCLUDEPATH += /epoc32/include/QBluetooth
       LIBS += -lQBluetooth

       customrules.pkg_prerules  = \
        ";QBluetooth" \
        "@\"$(EPOCROOT)Epoc32/InstallToDevice/QBluetooth_selfsigned.sisx\",(0xA003328D)"\
        " "

        DEPLOYMENT += customrules
}

Author:     user1
Created:    03/18/11 19:39:56

Thank you Sir, this will really help me!

Author:     user1
Created:    03/18/11 20:26:32

Sir! I have followed this guide but still, as I said in another post, the usage of QBtSingleDeviceSelectorUI causes the '''Unable to execute the file for security reasons'''. I donno what went wrong, but I have followed all the procedures as you said.

But I have installed the QuteMessenger in my mobile and that works fine and discovers the devices, but I haven’t seen any QBtSingleDeviceSelectorUI classes used. I think it is the problem alone with FP1 binaries. May be I could request a ticket if the error is definitely not on my side.

Sir, I still request any other way to retrieve the device list in Qt like the one used in QuteMessenger. Thanks for all the quick efforts you have taken for me.

Author:     user1
Created:    03/18/11 20:28:50

CPP File:

BtDeviceSelectorUi::BtDeviceSelectorUi(QWidget *parent) : QDialog(parent)
{
    btSelectionLayout = new QGridLayout;
    selectDevice = new  QPushButton("Start Discovery");
    deviceName = new QLabel("");
    btSelectionLayout->addWidget(selectDevice);
    btSelectionLayout->addWidget(deviceName);
    setLayout(btSelectionLayout);
    QObject::connect(selectDevice,SIGNAL(clicked()),this,SLOT(startDiscovery()));
}

BtDeviceSelectorUi::~BtDeviceSelectorUi()
{
    delete selectDevice;
    delete btSelectionLayout;
    delete discoveryUI;
    delete deviceName;
}

void BtDeviceSelectorUi::startDiscovery()
{
    discoveryUI = new QBtSingleDeviceSelectorUI();
    connect(discoveryUI, SIGNAL(discoveryCompleted (const QBtDevice &)),
                            this, SLOT(discoveryCompletedHandle(const QBtDevice &)));
            discoveryUI->show();

}

void BtDeviceSelectorUi::discoveryCompletedHandle(const QBtDevice &selectedDevice)
{
    this->deviceName->setText(selectedDevice.getName());
}

Header file implementation:

class BtDeviceSelectorUi : public QDialog
{
    Q_OBJECT

public:
    BtDeviceSelectorUi(QWidget *parent=0);
    ~BtDeviceSelectorUi();

public slots:
    void startDiscovery();
    void discoveryCompletedHandle(const QBtDevice &selectedDevice);

private:
    QBtSingleDeviceSelectorUI* discoveryUI;
    QPushButton *selectDevice;
    QGridLayout *btSelectionLayout;
    QLabel *deviceName;

};

Author:     user1
Created:    03/18/11 21:25:48

Sir I have removed some unwanted capabilities and now the project works. The wiki article actually recommended some unwanted capabilities. But am still doing with QBluetooth to get it work.