qt设置渐变背景色

通过qt方式来设置

 QLinearGradient linearGrad(QPointF(0, 0), QPointF(200, 200));  
 linearGrad.setColorAt(0, Qt::darkGreen);  
 linearGrad.setColorAt(1, Qt::yellow);  
 QBrush brush(linearGrad);  
 item->setBackground(brush);   QLinearGradient linearGrad(QPointF