Qt custom library in non Qt application

luca

Hi all,
I'm trying to develop a c++ library using Qt to be used in non Qt c++ applications without success.
The main problem seems to be how to start the event loop in the Qt Library.

My library has the following source code:

engine.cpp

#include "engine.h"

#include <QDebug>

int Engine::argc = 1;
char  *Engine::argv[] = {"Untitled", NULL};
QCoreApplication * Engine::app=NULL;
QThread * Engine::thread = NULL;


Engine::Engine(QObject *parent) : QObject(parent)
{
    if (thread == NULL)
    {
        thread = new QThread();
        connect(thread, SIGNAL(started()), this, SLOT(onStarted()), Qt::DirectConnection);
        thread->start();
    }
}
void Engine::onStarted()
{
   if (QCoreApplication::instance() == NULL)
   {
       app = new QCoreApplication(argc, argv);
       app->exec();
   }
//    startTimer(1000);
}
void Engine::timerEvent(QTimerEvent *e)
{
    qDebug() << "Engine::timerEvent";
}

untitled.cpp

#include "untitled.h"
#include <QDebug>
#include "engine.h"
Untitled::Untitled()
{
    e = new Engine();
}

and in the application that link to the library I have:

#include <iostream>
#include <unistd.h>
#include "untitled.h"
using namespace std;
int main()
{
    Untitled *u = new Untitled();
    while (1) {
        usleep(1000000);
        cout << "Hello World!" << endl;
    }
    return 0;
}

When running the application I get:

QApplication was not created in the main() thread.

Is there a solution?

Thanks

Luca