用QStyle->drawControl绘制QPushbotton怎样绘制带下划线的按钮？ [复制链接]

用QStyle->drawControl绘制QPushbotton怎样绘制带下划线的按钮？
这代码绘制出来不带下划线：

QStyleOptionButton buttonm;
        int tp= (option.rect.height() - MOREBTN_H) / 2;
        int lef = option.rect.left() + nHalf;
        buttonm.rect = QRect(lef,option.rect.top() + tp, MOREBTN_W, MOREBTN_H);
        buttonm.state |= QStyle::State_Enabled;
        if (buttonm.rect.contains(m_mousePoint))
        {
            (m_nType == 0)?
                buttonm.state |= QStyle::State_MouseOver:
                buttonm.state |= QStyle::State_Sunken;
        }
         buttonm.text = QString::fromLocal8Bit("详情");
        QFont font;
        font.setFamily("Microsoft YaHei");
        font.setPixelSize(20);
        font.setUnderline(true);
        painter->setFont(font);
        QWidget *pWidget = m_pMoreButton.data();
        m_pMoreButton->style()->drawControl(QStyle::CE_PushButton, &buttonm, painter, pWidget);
理想效果是：

图片:微信图片_20200811161850.png

这个就是给按钮的文本添加下划线嘛，用qss就能实现：text-decoration: underline;