plotbindingtracker.h

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

#include "plotsconfig.h"

#include <QHash>

class PlotExpression;
class PlotInstance;

class PlotBindingTracker
{
public:
  inline PlotBindingTracker() : _firstPlot(nullptr) {}

  inline PlotInstance *firstPlot() const { return _firstPlot; }

  inline void setFirstPlot(PlotInstance *plot) { _firstPlot = plot; }

  inline void setFirstPlotIf(PlotInstance *plot) { if (!_firstPlot) { _firstPlot = plot; } }

  inline void clearFirstPlot() { _firstPlot = nullptr; }

  void setMarker(const PlotExpression *expr, unsigned marker);

  bool markerFor(const PlotExpression *expr, unsigned &marker) const;

  bool contains(const PlotExpression *expr) const;

  void setHold(const PlotExpression *expr, bool hold = true);

  bool isHeld(const PlotExpression *expr) const;

  bool clear(const PlotExpression *expr);

private:
  PlotInstance *_firstPlot;       
  QHash<const PlotExpression *, unsigned> _markers; 
  QHash<const PlotExpression *, bool> _hold;        
};

#endif // PLOTBINDINGTRACKER_H_