Run QApplition in thread!

[A Former User]

Hello,
The problem is: I have two projects write by Qt,one is GUI and the other is a console. Now I want to merge these 2 projects,so I write two interfaces like "int gui_start(int argc, char** argv); int console_start();" to start GUI and Console;
Here is the code:
@
std::thread g_Thread = NULL;
static int work_thread(int argc, char* argv)
{
QApplication app(argc, argv);
MainWindow *mainWindow= new MainWindow ;
mainWindow->show();

app.exec();
return 0;

}

static int gui_start(int argc, char**argv)
{
if(!g_Thread) {
g_Thread = new std::thread(work_thread, argc, argv);
}
return 0;
}
static int console_start()
{
// same as gui_start;
}

int main(int argc, char**argv)
{
gui_start(argc, argv);
console_start();
getchar();
return 0;
}
@

When I running the program,I got "WARNING: QApplication was not created in the main() thread." the gui show normally,but the console thread not work.
Here is the debug infomations:
@
QObject::startTimer: QTimer can only be used with threads started with QThread
QObject::startTimer: QTimer can only be used with threads started with QThread
QObject::startTimer: QTimer can only be used with threads started with QThread
@

1.Does QApplication must run in main thread?
2.Is there a way to use two QApplications in one main(I tried write them in two libraries and export two interfaces it also not work).
Thank you!

[A Former User]

QApplication must run in main thread (GUI thread).
Similar restriction is true for almost all windowing systems including Java swt.
There is only one QApplication for one process.