Problem with background image

[qt890]

Thanks for your reply Uwe. Yes, I want to have the image as background of the main window.

I've tried to overload paintEvent methods this way:

void BarChart::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    painter.setBackgroundMode(Qt::TransparentMode);
}

void BarChart::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    painter.setBackgroundMode(Qt::TransparentMode);
}

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void MainWindow::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    QPixmap bkgnd(":/files/image.png");
    painter.drawPixmap(QPoint(0,0), bkgnd);
}

void MainWindow::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    QPixmap bkgnd(":/files/image.png");
    painter.drawPixmap(QPoint(0,0), bkgnd);
}

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But the output is:
img.JPG