Qt Creater 制作汽车仪表盘

void Form_KM::paintEvent(QPaintEvent *)
{
    QImage imagePointer(":/KM/Images/Km/Point.png");
    QPainter painter(this);
    QRect rct(32,39,324,324);
    painter.translate(m_pointX,m_pointY);
    painter.rotate(-14+m_degreespeed);
    painter.translate((0 - m_pointX),(0-m_pointY));
    painter.setRenderHint(QPainter::SmoothPixmapTransform,true);
    painter.drawImage(rct,imagePointer);
    painter.save();
    painter.restore();
}