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//
// Jane Tinslay September 2006
//
// Draw trajectories according to attribute.
//
#ifndef G4TRAJECTORYDRAWBYATTRIBUTE_HH
#define G4TRAJECTORYDRAWBYATTRIBUTE_HH

#include "globals.hh"
#include "G4VTrajectoryModel.hh"
#include <map>

class G4VAttValueFilter;
class G4VisTrajContext;

class G4TrajectoryDrawByAttribute : public G4VTrajectoryModel {

public:

  // Constructor
  G4TrajectoryDrawByAttribute(const G4String& name = "Unspecified", G4VisTrajContext* context=0);

  // Destructor
  virtual ~G4TrajectoryDrawByAttribute();

  // Draw the trajectory
  virtual void Draw(const G4VTrajectory& trajectory, 
		    const G4bool& visible = true) const;

  // Print configuration
  virtual void Print(std::ostream& ostr) const;

  // Configuration methods
  void Set(const G4String& attribute);
  void AddIntervalContext(const G4String& name, G4VisTrajContext* context);
  void AddValueContext(const G4String& name, G4VisTrajContext* context);

private:

  enum Config {Interval, SingleValue};

  typedef std::pair<G4String, Config> Pair;
  typedef std::map<Pair, G4VisTrajContext*> ContextMap;

  // Data members
  G4String fAttName;
  ContextMap fContextMap;

  // Caching
  mutable G4bool fFirst;
  mutable G4bool fWarnedMissingAttribute;
  mutable G4VAttValueFilter* filter;

};

#endif
