I am using a thread with an external event loop. This thread explains why: Postin custom events to a subclass of QThread
Now I've got a nasty problem with cleaning up timers running in the event loop class.
I've got tons of messages saying:
"QObject::killTimer: timers cannot be stopped from another thread"
when closing the application.

Example code snippets below illustrate the problem:

An example event loop class:
Qt Code: 
  1. class MyEventLoop : public QEventLoop
  2. {
  3. public:
  4.     MyEventLoop(QObject* parent = 0) : QEventLoop(parent)
  5.     {
  6.         timers << startTimer(1000);
  7.         timers << startTimer(2500);
  8.     }
  9.  
  10.     ~MyEventLoop()
  11.     {
  12.         // this basically gets never called since the output is flooded by thousands of lines saying:
  13.         // "QObject::killTimer: timers cannot be stopped from another thread"
  14.         // and i am forced to kill the application process
  15.         foreach (int id, timers)
  16.             killTimer(id);
  17.     }
  18.  
  19. protected:
  20.     void timerEvent(QTimerEvent* event)
  21.     {
  22.         qDebug() << "ID: " << event->timerId();
  23.     }
  24.  
  25. private:
  26.     QList<int> timers;
  27. };
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An example thread class using an "external" event loop:
Qt Code: 
  1. class MyThread : public QThread
  2. {
  3. public:
  4.     MyThread(QObject* parent = 0) : QThread(parent) {}
  5.  
  6.     ~MyThread()
  7.     {
  8.         myeventloop->quit();
  9.         // i have also tried "delete myeventloop;"
  10.         myeventloop->deleteLater();
  11.     }
  12.  
  13. protected:
  14.     void run()
  15.     {
  16.         myeventloop = new MyEventLoop;
  17.         myeventloop->exec();
  18.     }
  19.  
  20. private:
  21.     MyEventLoop* myeventloop;
  22. };
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An example widget managing a thread like above:
Qt Code: 
  1. class ThreadWidget : public QTextEdit
  2. {
  3. public:
  4.     ThreadWidget(QWidget* parent = 0) : QTextEdit(parent)
  5.     {
  6.         mythread = new MyThread(this);
  7.         mythread->start();
  8.     }
  9.  
  10.     ~ThreadWidget()
  11.     {
  12.         // as far as i understand, quit() would have no effect
  13.         // because the thread is running an external event loop
  14.         mythread->terminate();
  15.     }
  16.  
  17. private:
  18.     MyThread* mythread;
  19. };
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