plotexpression.h

//
// author Kazys Stepanas
//
// Copyright (c) CSIRO 2013
//
#ifndef __PLOTEXPRESSION_H_
#define __PLOTEXPRESSION_H_

#include "plotsconfig.h"

#include "plotexpressionbinddomain.h"

#include <QList>
#include <QString>

class PlotInstance;
class PlotBindingTracker;
class QwtPointSeriesData;

class PlotExpression
{
public:
  PlotExpression();
  virtual ~PlotExpression();

  virtual double sample(double sampleTime) const = 0;

  virtual BindResult bind(const QList<PlotInstance *> &curves, PlotBindingTracker &bindTracker,
                          PlotExpressionBindDomain &domain, bool repeatLastBinding = false) = 0;

  virtual void unbind() {}

  virtual PlotExpression *clone() const = 0;

  inline QString toString() const { return stringExpression(); }

  virtual inline bool explicitTime() const { return false; }

private:
  virtual QString stringExpression() const = 0;
};

#endif // __PLOTEXPRESSION_H_