QThread not running in different thread

I am trying to create a thread with an object inside it that does some work periodically (using a QTimer). My idea was to subclass QThread and have all communication as well as the timed event run through the event-loop. But with my current example, everything seems to still run in the same thread.

This is the thread-class.

Code:

---

class thread : public QThread
{
  Q_OBJECT
 
 private:
  QTimer *_timer;
 
 public:
  void run(void);
 
 public slots:
  void startTimer(int timeout);
  void _timeout(void);
 
};
 
void
thread::run(void) {
/* start the event-loop */
  exec();
}
 
void
thread::startTimer(int timeout) {
  if(!_timer)
    _timer = new QTimer();
 
      QObject::connect(_timer, SIGNAL(timeout()), this, SLOT(_timeout()));
 
  _timer->setInterval(timeout);
  _timer->start();
}
 
void
threadn::_timeout(void) {
  qDebug() << "timeout from" << QThread::currentThreadId();
}

---

This is what I run from my 'main' thread:

Code:

---

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
  ui->setupUi(this);
 
  thread *t = new thread();
 
  QObject::connect(this, SIGNAL(startTimer(int)), t, SLOT(startTimer(mode,int)), Qt::QueuedConnection);
  t->start(QThread::HighestPriority);
 
  qDebug() << "Hello from " << QThread::currentThreadId();
 
  emit startTimer(1000);
}

---

http://www.qtcentre.org/search.php?d...hread+affinity

Thanks for the link!

After reading some more I found that threading in Qt does not work as I thought. The following does seem to work:

Code:

---

/* notice that thread no longer inherits from QThread */
class thread : public QObject
{
  Q_OBJECT
 
 private:
  QTimer *_timer;
 
 public slots:
  void startTimer(int timeout);
  void _timeout(void);
 
};
 
void
thread::startTimer(int timeout) {
  if(!_timer)
    _timer = new QTimer();
 
      QObject::connect(_timer, SIGNAL(timeout()), this, SLOT(_timeout()));
 
  _timer->setInterval(timeout);
  _timer->start();
}
 
void
threadn::_timeout(void) {
  qDebug() << "timeout from" << QThread::currentThreadId();
}

---

Now create a QThread object and move the instance of 'thread' to it.

Code:

---

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
  ui->setupUi(this);
 
  thread *t = new thread();
  QThread *qthread = new QThread();
 
  QObject::connect(this, SIGNAL(startTimer(int)), t, SLOT(startTimer(mode,int)), Qt::QueuedConnection);
  t->moveToThread(qthread);
 
  qthread->start(QThread::HighestPriority);
 
  qDebug() << "Hello from " << QThread::currentThreadId();
 
  emit startTimer(1000);
}

---