Easy Signal-Slot-Problem

[nearlyNERD]

Hey,

I have a small problem:

I want to connect my QPushButtons to a Slot, which needs a int as argument, so I tried:

QObject::connect(Level1, SIGNAL(clicked()), parent, SLOT(StartLevel(1)));
QObject::connect(Level2, SIGNAL(clicked()), parent, SLOT(StartLevel(2)));
QObject::connect(Level3, SIGNAL(clicked()), parent, SLOT(StartLevel(3)));
But as an application output, I get:

Object::connect: No such slot StartWindow::StartLevel(1)
Object::connect: No such slot StartWindow::StartLevel(2)
Object::connect: No such slot StartWindow::StartLevel(3)

Object::connect: No such slot StartWindow::StartLevel(1)
Object::connect: No such slot StartWindow::StartLevel(2)
Object::connect: No such slot StartWindow::StartLevel(3)

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My Slot in a QMainWindow:

void StartWindow::StartLevel(int _level)
{
Level *level = new Level(_level);
qDebug() << this->focusWidget();

this->setCentralWidget(level);
level->grabKeyboard();

}

Is there a easy way to connect the clicked()-Signal to a Slot, which needs an int-argument?

Thanks for your answer...

nearlyNERD