I fill the color between the two graphs, both the section below the mRefGraph and the part above are filled
mGraph = ui->plot->addGraph(ui->plot->xAxis2, ui->plot->yAxis); mRefGraph = ui->plot->addGraph(ui->plot->xAxis2, ui->plot->yAxis); mRefGraph->setBrush(QBrush(QColor(153, 53, 53, 94))); mRefGraph->setChannelFillGraph(mGraph);
how can I fill only the lower area of the mRefGraph , not the upper area?