利用QCustomPlot绘制饼图 - QTCN开发网

void MainWindow::setupPieDemo(QCustomPlot *customPlot)
{
    QCPPie *pie1 = new QCPPie(customPlot);
    QVector<QString> labels = {
        "rose1","rose2","rose3","rose4","rose5","rose6","rose7","rose8",
    };
    QVector<double> values1 = {
        10, 5, 15, 25, 20, 35, 30, 40
    };
    pie1->add(labels, values1);

    pie1->setHoleSize(0.3);
    pie1->setRadius(0.4);
    pie1->setCenter(0.15, 0.25);
    pie1->setLabelVisible(false);
    pie1->setRoseType(QCPPie::rtRadius);
    connect(pie1, &QCPPie::hoveredSlice, [](QCPPieSlice *slice, bool hovered){
        slice->setLabelVisible(hovered);
    });

    QCPPie *pie2 = new QCPPie(customPlot);
    pie2->add(labels, values1);

    pie2->setHoleSize(0.5);
    pie2->setRadius(0.4);
    pie2->setCenter(0.15, 0.75);
    pie2->setRoseType(QCPPie::rtArea);

    QCPPie *pie3 = new QCPPie(customPlot);
    QVector<QString> labels3 = {
        "直接访问", "邮件营销", "联盟广告", "视频广告", "搜索引擎"
    };
    QVector<double> values3 = {
        335, 310, 234, 135, 1548
    };
    pie3->add(labels3, values3);
    pie3->setRadius(0.4);
    pie3->setCenter(0.4, 0.25);
    pie3->setTextFormat("{b}:{d}%");

    QCPPie *pie4 = new QCPPie(customPlot);
    pie4->add(labels3, values3);
    pie4->setRadius(0.4);
    pie4->setCenter(0.4, 0.75);
    pie4->setHoleSize(0.7);
    pie4->setLabelVisible(false);
    pie4->setLabelPosition(QCPPieSlice::lpCenter);
    pie4->setLabelFont(QFont("sans-serif", 30, QFont::Bold));
    connect(pie4, &QCPPie::hoveredSlice, [](QCPPieSlice *slice, bool hovered){
        slice->setLabelVisible(hovered);
    });

    QCPPie *pie5 = new QCPPie(customPlot);
    QVector<QString> labels5 = {
        "直达", "营销广告", "搜索引擎"
    };
    QVector<double> values5 = {
        335, 679, 1548
    };
    pie5->add(labels5, values5);
    pie5->setRadius(0.3);
    pie5->setLabelPosition(QCPPieSlice::lpInside);
    pie5->setLabelColor(Qt::white);
    pie5->setSelectedMode(QCPPie::smSingle);
    pie5->setCenter(0.75, 0.5);

    QCPPie *pie6 = new QCPPie(customPlot);
    QVector<QString> labels6 = {
        "直达", "邮件营销", "联盟广告", "视频广告", "百度", "谷歌", "必应", "其他"
    };
    QVector<double> values6 = {
        335, 310, 234, 135, 1048, 251, 147, 102
    };
    pie6->add(labels6, values6);
    pie6->setName("访问来源");
    pie6->setRadius(0.55);
    pie6->setHoleSize(0.75);
    pie6->setCenter(0.75, 0.5);
    pie6->setTextFormat("{a}\n{b}：{c} {d}%");
}