QT获取控件中心点，图片按比例缩放

void BirdEyeStitch::resizeEvent ( QResizeEvent * event )
{
QPoint point = rect().center();
m_zhuangjiaLabel->setGeometry(point.x()/6*5,point.y()/4*3, point.x()/6*2, point.y()/4*2);
QSize size(m_zhuangjiaLabel->width(), m_zhuangjiaLabel->height());
m_zhuangjiaLabel->setPixmap(QPixmap("zhuangjia.jpg").scaled(size));
}