QSerialDevice cause GUI to freeze

[dkoryagin]

Hi all I have another problem. maybe someone seen this before....

I'm using QSerialDevice lib to communicate with GPS reciever over COM port. All work with this lib i've moved to thread.

Very very simplified class looks like this:
header:

class testThread : public QThread
{
    Q_OBJECT
 
public:
    testThread(){};
protected:
    virtual void run();
private slots:
    void trigged();
private:
    AbstractSerial *as;
};

class testThread : public QThread
{
    Q_OBJECT

public:
    testThread(){};
protected:
    virtual void run();
private slots:
    void trigged();
private:
    AbstractSerial *as;
};

To copy to clipboard, switch view to plain text mode 

cpp:

void testThread::run()
{
 
 
    QTimer *timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(trigged()));
    timer->start(10000);
 
    as = new AbstractSerial(this);
    as->setDeviceName("COM3");
 
    exec(); // begin eventloop
}
 
void testThread::trigged()
{
 
    if (!as->isOpen())
    {
        if (as->open(AbstractSerial::ReadOnly))
        {
            QMessageBox *msg = new QMessageBox();
            msg->setText( " opened ");
            msg->show();
        }
 
    }
}

void testThread::run()
{


    QTimer *timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(trigged()));
    timer->start(10000);

    as = new AbstractSerial(this);
    as->setDeviceName("COM3");

    exec(); // begin eventloop
}

void testThread::trigged()
{

    if (!as->isOpen())
    {
        if (as->open(AbstractSerial::ReadOnly))
        {
            QMessageBox *msg = new QMessageBox();
            msg->setText( " opened ");
            msg->show();
        }

    }
}

To copy to clipboard, switch view to plain text mode 

Thread starts, after 10 seconds timer emit signal timeout and all GUI freeze... After it leave trigged func everything woks normal until next emit
Any ideas? Problem in lib or ...?

update:
QObject: Cannot create children for a parent that is in a different thread.
(Parent is testThread(0xba2af8), parent's thread is QThread(0xad7938), current thread is testThread(0xba2af8)

this was in console. What does it mean?

update:
problem solved:

testThread thrd = new testThread();
thrd->moveToThread(thrd);

testThread thrd = new testThread();
thrd->moveToThread(thrd);

To copy to clipboard, switch view to plain text mode 

is it correct?

[wysota]

No, you're doing it wrong. And after moveToThread() you'll be accessing GUI from non-gui thread.

[dkoryagin]

I think i've posted bad example of class
There is no GUI connection between threads...No messageboxes....Connection between gui and thread inplemented by signals.

Thanks, wysota.