Qt使用曲线图来显示QTreeWidget中的数据

INCLUDEPATH += $$PWD/qcustomplot
LIBS += -L$$PWD/qcustomplot -lqcustomplot

#include <QApplication>
#include <QTreeWidget>
#include <QVBoxLayout>
#include <QtCharts/QChartView>
#include <QtCharts/QLineSeries>
#include <QtCharts/QValueAxis>

QT_CHARTS_USE_NAMESPACE

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    // 创建一个QTreeWidget并填充数据
    QTreeWidget treeWidget;
    treeWidget.setHeaderLabels({"Name", "Age"});
    QTreeWidgetItem *item1 = new QTreeWidgetItem(&treeWidget, {"Dog", "3"});
    QTreeWidgetItem *item2 = new QTreeWidgetItem(&treeWidget, {"Cat", "5"});
    QTreeWidgetItem *item3 = new QTreeWidgetItem(&treeWidget, {"Bird", "2.5"});

    // 创建QLineSeries并填充数据
    QLineSeries *series = new QLineSeries();
    series->append(0, treeWidget.topLevelItem(0)->text(1).toDouble());
    series->append(1, treeWidget.topLevelItem(1)->text(1).toDouble());
    series->append(2, treeWidget.topLevelItem(2)->text(1).toDouble());

    // 创建X轴和Y轴
    QValueAxis *xAxis = new QValueAxis();
    xAxis->setTickCount(treeWidget.topLevelItemCount());
    xAxis->setLabelFormat("%d");
    xAxis->setTitleText("Name");
    QValueAxis *yAxis = new QValueAxis();
    yAxis->setRange(0, 10);
    yAxis->setTitleText("Age");

    // 创建图表并添加曲线
    QChart *chart = new QChart();
    chart->addSeries(series);
    chart->setTitle("Animal Age");
    chart->setAxisX(xAxis, series);
    chart->setAxisY(yAxis);

    // 创建图表视图并显示
    QChartView chartView(chart);
    chartView.show();

    return a.exec();
}