plotunaryoperator.h

//
// author Kazys Stepanas
//
// Copyright (c) CSIRO 2015
//
#ifndef PLOTUNARYOPERATOR_H_
#define PLOTUNARYOPERATOR_H_

#include "plotsconfig.h"

#include "plotexpression.h"

#include <QTextStream>

class PlotUnaryOperator : public PlotExpression
{
public:
  inline PlotUnaryOperator(PlotExpression *operand) : _operand(operand) {}

  ~PlotUnaryOperator();

  inline void setOperand(PlotExpression *operand) { _operand = operand; }

  inline const PlotExpression *operand() const { return _operand; }

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

  virtual void unbind();

  bool explicitTime() const override;

private:
  PlotExpression *_operand; 
};


template <class Operator>
class PlotUnaryOperatorT : public PlotUnaryOperator
{
public:
  inline PlotUnaryOperatorT() : PlotUnaryOperator(0) {}

  inline PlotUnaryOperatorT(PlotExpression *operand) : PlotUnaryOperator(operand) {}

  virtual inline double sample(double sampleTime) const
  {
    return Operator()(operand()->sample(sampleTime));
  }

  inline const QString &opStr() const { return _opStr; }

  inline void setOpStr(const QString &str) { _opStr = str; }

  virtual PlotExpression *clone() const
  {
    PlotUnaryOperatorT<Operator> *op = new PlotUnaryOperatorT<Operator>(operand()->clone());
    op->setOpStr(_opStr);
    return op;
  }

private:
  virtual QString stringExpression() const
  {
    QString str;
    QTextStream stream(&str);
    stream << _opStr << operand()->toString();
    return str;
  }

  QString _opStr; 
};

#endif // PLOTUNARYOPERATOR_H_