source: flair-src/trunk/tools/FlairGCS/src/Scope.h@ 16

// %flair:license{
// This file is part of the Flair framework distributed under the
// CECILL-C License, Version 1.0.
// %flair:license}
#ifndef SCOPE_H_INCLUDED
#define SCOPE_H_INCLUDED

#include <qwt_plot.h>
#include <QPen>

class ScrollBar;
class QwtPlotCurve;
class QwtPlotItem;
class QMouseEvent;

class Scope : public QwtPlot {
  Q_OBJECT

public:
  Scope(QString title, float ymin, float ymax, float view_size_s = 20,
        unsigned int refresh_rate_ms = 40, unsigned int history_size = 20000);
  ~Scope();
  int addCurve(QPen pen, QString legend);
  void resetXView(void);
  void resetYView(void);

protected:
  struct Curve {
    QwtPlotCurve *plot;
    double *data_x;
    double *data_y;
    unsigned int index;
    unsigned int min_index;
    unsigned int max_index;
  };
  QList<Curve *> curves;
  float elapsed_time_s;

  void updateCurve(Curve *curve);
  bool eventFilter(QObject *, QEvent *);

private:
  float ymin, ymax;
  float view_size_s, orig_view_size_s;
  unsigned int history_size;
  ScrollBar *scrollbar;
  bool scrolling;
  float min_scroll, max_scroll;

  void alignScales(void);
  void showCurve(QwtPlotItem *item, bool on);
  void computeMinIndex(Curve *curve, float displayed_min_time);
  void computeMaxIndex(Curve *curve, float displayed_max_time);
  void changeViewSize(float new_view_size_s);

private slots:
  void legendChecked(const QVariant &itemInfo, bool on);
  void scrollBarMoved(Qt::Orientation o, float min, float max);
};

#endif // SCOPE_H_INCLUDED