qt 画图 持续更新

//    QCustomPlot *customPlot;
    const QVector x = {0, 1, 2, 3, 4, 5};
    const QVector y = {1, 1, 2, 2, 4, 4};
    customPlot = ui->ctp;
    customPlot->setOpenGl(true);
    customPlot->addGraph();
    customPlot->xAxis->setRange(0, 5);
    customPlot->yAxis->setRange(0, 5);
    customPlot->xAxis2->setRange(0, 5);
    customPlot->yAxis2->setRange(0, 5);
    customPlot->xAxis2->setVisible(true);
    customPlot->yAxis2->setVisible(true);
    customPlot->graph(0)->setData(x, y);
    customPlot->legend->setVisible(false);
    customPlot->graph(0)->setLineStyle(QCPGraph::LineStyle::lsLine);  // 设置线性
    //    customPlot->graph(0)->setName("TEST");
    //    customPlot->xAxis->setLabel("x");
    //    customPlot->yAxis->setLabel("y");
    //    customPlot->replot();
//    customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
    customPlot->axisRect(0)->setRangeZoomFactor(0.9, 0.9); // x方向为1.2
    customPlot->setInteractions(QCP::iRangeZoom);

http://wormhole.app/plMol#EzkDp3kbcnqv7eRLiWI4xA