typedef QList<long double> doubleList;

class MyThread : public QThread
{
public:
    MyThread();
    ~MyThread();
};

class MyObject : public QObject
{
    Q_OBJECT
public:
    explicit MyObject(QObject *parent = 0);
    ~MyObject();

signals:
    void jobDone(const doubleList&);

public slots:
    void jobStart();
};

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private:
    Ui::MainWindow *ui;

private slots:
    void buttonClicked();
    void receiveResult(const doubleList&);
};

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    qDebug() << "GUI Thread ID: " << QThread::currentThreadId();
    connect(ui->pushButton, &QPushButton::clicked, this, &MainWindow::buttonClicked);

    qRegisterMetaType<doubleList>("doubleList");
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::buttonClicked()
{
    MyThread* thread = new MyThread;
    MyObject* object = new MyObject;

    object->moveToThread(thread);

    connect(thread, &MyThread::started, object, &MyObject::jobStart);
    connect(object, &MyObject::jobDone, this, &MainWindow::receiveResult);
    connect(object, &MyObject::jobDone, thread, &MyThread::quit);
    connect(thread, &MyThread::finished, object, &MyObject::deleteLater);
    connect(thread, &MyThread::finished, thread, &MyThread::deleteLater);
    thread->start();
}

void MainWindow::receiveResult(const doubleList &)
{
    qDebug() << "Received result";
}

MyThread::MyThread()
{
    qDebug() << "MyThread ctor, thread ID:\t" << currentThreadId();
}

MyThread::~MyThread()
{
    qDebug() << "MyThread dtor, thread ID:\t" << currentThreadId();
}

MyObject::MyObject(QObject *parent) : QObject(parent)
{
    qDebug() << "MyObject ctor. MyObject pointer:\t" << this
                << "\tThread ID:\t" << QThread::currentThreadId();
    qRegisterMetaType<doubleList>("doubleList");
}

MyObject::~MyObject()
{
    qDebug() << "MyObject dtor and list deleted. MyObject pointer:\t" << this
             << "\tThread ID:\t" << QThread::currentThreadId();
}

void MyObject::jobStart()
{
    doubleList list;
    qDebug() << this << "jobStart() called. Thread ID:\t" << QThread::currentThreadId();
    for (int i = 0; i != 100000000; ++i)
    {
        list.push_back(i);
    }

    emit jobDone(list);
}

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

MyThread ctor, thread ID:    0x7f3dbbbf1780
MyObject ctor. MyObject pointer:     MyObject(0xbc03a0)     Thread ID:   0x7f3dbbbf1780
MyObject(0xbc03a0) jobStart() called. Thread ID:     0x7f3d9e6df700
Received result
MyObject dtor and list deleted. MyObject pointer:    MyObject(0xbc03a0)     Thread ID:   0x7f3d9e6df700
MyThread dtor, thread ID:    0x7f3dbbbf1780
MyThread ctor, thread ID:    0x7f3dbbbf1780
MyObject ctor. MyObject pointer:     MyObject(0xbafca0)     Thread ID:   0x7f3dbbbf1780
MyObject(0xbafca0) jobStart() called. Thread ID:     0x7f3d9e6df700
Received result
MyObject dtor and list deleted. MyObject pointer:    MyObject(0xbafca0)     Thread ID:   0x7f3d9e6df700
MyThread dtor, thread ID:    0x7f3dbbbf1780
MyThread ctor, thread ID:    0x7f3dbbbf1780
MyObject ctor. MyObject pointer:     MyObject(0xbc03a0)     Thread ID:   0x7f3dbbbf1780
MyObject(0xbc03a0) jobStart() called. Thread ID:     0x7f3d9e6df700
Received result
MyObject dtor and list deleted. MyObject pointer:    MyObject(0xbc03a0)     Thread ID:   0x7f3d9e6df700
MyThread dtor, thread ID:    0x7f3dbbbf1780