#ifndef DIFFHISTOGRAPH_H
  #define DIFFHISTOGRAPH_H
  
  #include <QWidget>
  #include <QList>
  #include <QColor>
  #include <opencv2/core/core.hpp>
  
  class DiffHistoGraph: public QWidget
  {
    Q_OBJECT
  
   public:
    DiffHistoGraph(QColor color, bool minusY = false, int scale = 4, int width = 380, int height = 100, QWidget *parent = 0);
  
    public slots:
    void appendDist(qreal dist);
    void setScale(int scale);
  
    protected:
    void paintEvent(QPaintEvent *event);
  
   private:
    int m_height;
    qreal m_scale;
    bool m_minusY;
    QList<qreal> m_distList;
    QColor m_color;
  };
  
  #endif