Is it not possible to post custom events (across thread) to a QThread descendant? Or am I doing something wrong? Should I create a child for the thread and post events to the child object to get events delivered to the correct thread?

The code below illustrates the problem:
Qt Code: 
  1. #include <QtGui>
  2. #include <QtDebug>
  3.  
  4. class MyThread : public QThread
  5. {
  6. public:
  7.     MyThread(QObject* parent = 0) : QThread(parent)
  8.     {
  9.     }
  10.  
  11. protected:
  12.     void run()
  13.     {
  14.         qDebug() << "MyThread::run()" << QThread::currentThread() << this->thread();
  15.         exec();
  16.     }
  17.  
  18.     void customEvent(QEvent* event)
  19.     {
  20.         qDebug() << "MyThread::customEvent()" << QThread::currentThread() << this->thread();
  21.         // a long loop here will naturally block GUI
  22.         qDebug() << "LOOP BEGIN";
  23.         for (uint i = 0; i < -1; ++i);
  24.         qDebug() << "LOOP END";
  25.     }
  26. };
  27.  
  28. class EventButton : public QPushButton
  29. {
  30.     Q_OBJECT
  31.  
  32. public:
  33.     EventButton() : QPushButton("Post an event")
  34.     {
  35.         mythread = new MyThread(this); // creating without parent has no effect
  36.         mythread->start();
  37.         connect(this, SIGNAL(clicked()), this, SLOT(postEvent()));
  38.     }
  39.  
  40. private slots:
  41.     void postEvent()
  42.     {
  43.         qDebug() << "EventButton::postEvent()" << QThread::currentThread() << this->thread();
  44.         QApplication::postEvent(mythread, new QEvent(QEvent::User));
  45.     }
  46.  
  47. private:
  48.     MyThread* mythread;
  49. };
  50.  
  51. int main(int argc, char *argv[])
  52. {
  53.     QApplication a(argc, argv);
  54.     qDebug() << "main()" << QThread::currentThread();
  55.     EventButton b;
  56.     b.show();
  57.     a.connect(&a, SIGNAL(lastWindowClosed()), &a, SLOT(quit()));
  58.     return a.exec();
  59. }
  60.  
  61. #include "main.moc"
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Please, spot a mistake there..