CLONE - QPrintPreviewDialog print just one page doesn't work.

If I write to the QPainter every thing works fine.
But if I like to print just the second site all sites will be printed.

void UPrintTextEditor::onPrint(){
QPrinter printer(QPrinter::ScreenResolution);
printer.setPageSize(QPrinter::A4);
printer.setOrientation(QPrinter::Landscape);
printer.setPageOrder(QPrinter::FirstPageFirst);

QPrintPreviewDialog preview(&printer);
connect(&preview, SIGNAL(paintRequested(QPrinter*)), SLOT(onPrint(QPrinter*)));
preview.exec();
}

void UPrintTextEditor::onPrint(QPrinter *printer){
QPainter painter;

painter.begin(printer);

for(int i = 1; i <= 3; i++)

{ painter.drawText(QRectF(10.0, 10.0, 100.0, 100.0), QString::number(i) + ". Page"); if(i < 3) printer->newPage(); }

painter.end();
}