QTimer doesnt work or complains about thread

[daemonna]

i got following code

class freez_session : public QThread
{
Q_OBJECT
public:
    explicit freez_session(QObject *parent = 0);
    void run();
 
private slots:
    void uploadfullmap();
}
 
void freez_session::run()
{
    QTimer *tr = new QTimer();
    connect(tr, SIGNAL(timeout()), this, SLOT(uploadfullmap()));
    tr->start(500);
...
}
 
void freez_session::uploadfullmap()
{
    qDebug() << "uploading full map";
}

class freez_session : public QThread
{
Q_OBJECT
public:
    explicit freez_session(QObject *parent = 0);
    void run();

private slots:
    void uploadfullmap();
}

void freez_session::run()
{
    QTimer *tr = new QTimer();
    connect(tr, SIGNAL(timeout()), this, SLOT(uploadfullmap()));
    tr->start(500);
...
}

void freez_session::uploadfullmap()
{
    qDebug() << "uploading full map";
}

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but uploadfullmap() will never trigger!!

when i use QTimer *tr = new QTimer(this);

when i use QTimer *tr = new QTimer(this);

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i get QObject: Cannot create children for parent that is in different thread...

where in a thread should be timer put so it work properly?