#ifndef PLOTVIEW_H
#define PLOTVIEW_H

#include <qcustomplot/qcustomplot.h>

/**
 * @例子
 *   QVector<PlotView::Data> pd;
    pd << PlotView::Data { "经典1", 0.6 };
    pd << PlotView::Data { "经典2", 0.2 };
    pd << PlotView::Data { "经典3", 0.3 };
    pd << PlotView::Data { "经典4", 0.61 };
    pd << PlotView::Data { "经典5", 0.52 };
    pd << PlotView::Data { "经典6", 0.233 };

    pd << PlotView::Data { "经典7", 0.16 };
    pd << PlotView::Data { "经典8", 0.22 };
    pd << PlotView::Data { "经典9", 0.33 };
    pd << PlotView::Data { "经典10", 0.161 };
    pd << PlotView::Data { "经典11", 0.152 };
    pd << PlotView::Data { "经典12", 0.133 };

    pd << PlotView::Data { "经典13", 0.36 };
    pd << PlotView::Data { "经典14", 0.72 };
    pd << PlotView::Data { "经典15", 0.3 };
    pd << PlotView::Data { "经典16", 0.861 };
    pd << PlotView::Data { "经典17", 0.552 };
    pd << PlotView::Data { "经典18", 0.93 };
    PlotView *pv = new PlotView(PlotView::Area, pd, "标题");
 */

class PlotView : public QCustomPlot
{
    Q_OBJECT
public:
    enum PlotType
    {
        Line,                 // 折线图
        HistogramHorizontal,  // 横向柱状图
        HistogramVertical,    // 竖向柱状图
                              //        Pie,                  // QCustomPlot不支持饼图
        Curve,                // 曲线图
        Area,                 // 面积图
    };
    Q_ENUM(PlotType)

    struct Data
    {
        QString name;
        double value;

        bool operator==(const Data &r) const { return (this->name == r.name) && (this->value == r.value); }
    };

    explicit PlotView(PlotType t, const QVector<Data> &data, const QString &title = "", QWidget *parent = nullptr);

    void updateType(PlotType t);

    void updateData(const QVector<Data> &data);

    QPixmap toPixmap();

    void plot();

signals:

private:
    PlotType m_plotType;
    QVector<Data> m_sourceData;
    QString m_title;

    void drawLine();
    void drawHistogram(bool horizontal = false);
    void drawCurve();
    void drawArea();
};

#endif  // PLOTVIEW_H