QTreeWidget 填充Indictor指示器背景色

void TreeWidget::drawRow(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const{QStyleOptionViewItemV3 opt = option;if (index.parent() == QModelIndex()){const QColor c = option.palette.color(QPalette::Dark);painter->fillRect(option.rect, c);opt.palette.setColor(QPalette::AlternateBase, c);}QTreeWidget::drawRow(painter, opt, index);QColor color = static_cast<QRgb>(QApplication::style()->styleHint(QStyle::SH_Table_GridLineColor, &opt));painter->save();painter->setPen(QPen(color));painter->drawLine(opt.rect.x(), opt.rect.bottom(), opt.rect.right(), opt.rect.bottom());painter->restore();}

效果如下：