效果图:

QChart绘制折线区域-LMLPHP

代码:

    // 创建折线上点的序列
    QLineSeries *splineSeries = new QLineSeries();
    //QSplineSeries *splineSeries = new QSplineSeries();
    splineSeries->setName("spline");
    splineSeries->append(0, 6);
    splineSeries->append(2, 4);
    splineSeries->append(3, 8);
    splineSeries->append(7, 4);
    splineSeries->append(10, 5);
    *splineSeries << QPointF(11, 1) << QPointF(13, 3) << QPointF(17, 6) << QPointF(18, 3) << QPointF(20, 2);
    // 标记点
    QScatterSeries *scatterSeries = new QScatterSeries();
    scatterSeries->setPointLabelsFormat("@yPoint");
    scatterSeries->setPointLabelsVisible();
    scatterSeries->setMarkerSize(8);
    scatterSeries->append(0, 6);
    scatterSeries->append(2, 4);
    scatterSeries->append(3, 8);
    scatterSeries->append(7, 4);
    scatterSeries->append(10, 5);
    *scatterSeries << QPointF(11, 1) << QPointF(13, 3) << QPointF(17, 6) << QPointF(18, 3) << QPointF(20, 2);
    //区域填充
    QAreaSeries *series = new QAreaSeries(splineSeries);
    series->setName("Batman");
    QPen pen(0x059605);
    pen.setWidth(3);
    series->setPen(pen);
    // 使用点的序列创建图标
    QChart *chart = new QChart();
    chart->legend()->hide();
    chart->addSeries(splineSeries);
    chart->addSeries(scatterSeries);
    chart->addSeries(series);
    chart->createDefaultAxes();
    chart->axisY()->setRange(0, 10);
//    //X轴下标
//    QStringList categories;
//    categories << "Jan" << "Feb" << "Mar" << "Apr" << "May" ;
//    QBarCategoryAxis *axisX = new QBarCategoryAxis();
//    axisX->append(categories);
//    chart->setAxisX(axisX, scatterSeries);
    QChartView *chartView = new QChartView(chart);
    chartView->setRenderHint(QPainter::Antialiasing);
    MainWindow w;
    w.setCentralWidget(chartView);
    w.show();
05-11 01:17