#ifndef CURVEPLOTWIDGET_H
#define CURVEPLOTWIDGET_H

#include <QWidget>
#include <QtCharts/QChart>
#include <QtCharts/QChartView>
#include <QtCharts/QLineSeries>
#include <QtCharts/QValueAxis>
#include <QtCharts/QDateTimeAxis>
#include <QGraphicsLayout>
#include <QDateTime>

QT_BEGIN_NAMESPACE
namespace QtCharts {
    class QChart;
    class QChartView;
    class QLineSeries;
    class QValueAxis;
}
QT_END_NAMESPACE

class CurvePlotWidget : public QWidget
{
    Q_OBJECT
public:
    explicit CurvePlotWidget(QWidget *parent = nullptr);

    int  addSeries(const QString &name, const QColor &color);
    void appendPoint(int seriesIndex, double yValue);
protected:
    void changeEvent(QEvent *e) override;


private:
    void initChart();
    void updateAxisRange();

    QtCharts::QChart          *m_chart = nullptr;
    QtCharts::QChartView      *m_view  = nullptr;
    QList<QtCharts::QLineSeries*> m_series;
    QtCharts::QDateTimeAxis *m_axisX = nullptr;   // 替换
    QtCharts::QValueAxis    *m_axisY = nullptr;

    static constexpr int MAX_POINTS = 300;
    static constexpr int TIME_WINDOW_S = 300;   // 600 秒 = 10 分钟
    int  m_tick = 0;
};

#endif // CURVEPLOTWIDGET_H