plotexpressiongenerator.h

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

#include "ocurvesconfig.h"

#include "plotgenerator.h"

class QMutex;

class PlotExpressionGenerator : public PlotGenerator
{
  Q_OBJECT
public:
  PlotExpressionGenerator(Curves *curves, const QList<PlotExpression *> &expressions, const QStringList &sourceNames);

  PlotExpressionGenerator(Curves *curves, const QList<const PlotExpression *> &expressions, const QStringList &sourceNames);

  ~PlotExpressionGenerator();

  enum AddExpressionResult
  {
    AER_QueuedPartial = -1,
    AER_AlreadyComplete,
    AER_Queued
  };

  int addExpression(const PlotExpression *expression);

  int addExpressions(const QList<const PlotExpression *> &expressions);

  bool removeExpression(const PlotExpression *expression);

protected:
  void run() override;

  bool curveExists(const PlotInstance &curve) const;

private:
  template <typename T>
  void init(Curves *curves, const QList<T *> &expressions, const QStringList &sourceNames);

  struct ExpressionPair
  {
    PlotExpression *expression;         
    const PlotExpression *original;     

    inline bool operator == (const PlotExpression *exp) { return original == exp; }
  };

  QVector<ExpressionPair> _expressions;   
  QList<PlotInstance *> _existingCurves;  
  QStringList _sourceNames;               
  struct GenerationMarker *_marker;       
};

#endif // PLOTEXPRESSIONGENERATOR_H_