MainWindow下设置背景图片要怎样做？ [复制链接]

我想在MainWindow里设置一个背景图片要怎样做呢?
举手之劳    请各个大侠多多指教小弟呀！

    QString m_strBackground;
    m_strBackground = "background.bmp";

    QPalette palette = this->palette();
    QPixmap pixmap(m_strBackground);
    palette.setBrush(QPalette::Window, QBrush(pixmap));
    this->setPalette(palette);

    resize(pixmap.width(),pixmap.height() - 32);

    QBitmap backgroundMask(m_strBackground);