Set background image in QMainWindow

[superteny]

hi,

I have a problem when i try to load a background image in a QMainWindow.
i override the paintevent method with the next code:

void MainWindow::paintEvent(QPaintEvent *pe)
 {
 
    QPainter* pPainter = new QPainter(this);
    pPainter->drawPixmap(rect(), QPixmap(":/images/metal.png"));
    delete pPainter;
    QWidget::paintEvent(pe);
 
 }

void MainWindow::paintEvent(QPaintEvent *pe)
 {
    
    QPainter* pPainter = new QPainter(this);
    pPainter->drawPixmap(rect(), QPixmap(":/images/metal.png"));
    delete pPainter;
    QWidget::paintEvent(pe);

 }

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I think the code is ok, but i am not sure!!! It doesnt load any bg image.
the image size has to match with mainwindow size?
any ideas??
thank you.