1 void XXX::paintEvent(QPaintEvent *event)
 2 {
 3     QPainter painter(this);
 4     //圓角矩形范圍
 5     QPainterPath path;
 6     path.addRoundedRect(this->rect(),10,10);
 7     //漸變顏色設置
 8     QLinearGradient linearGrad(0,0,0,this->height());
 9     linearGrad.setColorAt(0,Qt::blue);
10     linearGrad.setColorAt(1,Qt::red);
11     //繪制
12     painter.fillPath(path,linearGrad);
13 }