#pragma once
 
#ifndef MODIFIERASSISTANTS_INCLUDED
#define MODIFIERASSISTANTS_INCLUDED
 
// TnzTools includes
#include <tools/assistant.h>
#include <tools/inputmanager.h>
 
#undef DVAPI
#undef DVVAR
#ifdef TNZTOOLS_EXPORTS
#define DVAPI DV_EXPORT_API
#define DVVAR DV_EXPORT_VAR
#else
#define DVAPI DV_IMPORT_API
#define DVVAR DV_IMPORT_VAR
#endif
 
 
//===================================================================
 
//*****************************************************************************************
//    TModifierAssistants definition
//*****************************************************************************************
 
class DVAPI TModifierAssistants: public TInputModifier {
public:
  typedef TSubTrackHandler Handler;
  class DVAPI Interpolator: public TTrackInterpolator {
  public:
    const double magnetism;
    TGuidelineList guidelines;
    inline Interpolator(TTrack &track, double magnetism):
      TTrackInterpolator(track),
      magnetism(magnetism > 0 ? (magnetism < 1 ? magnetism : 1) : 0)
      { }
    TTrackPoint interpolate(double index) override;
  };
 
private:
  bool scanAssistants( 
    const TPointD *positions,
    int positionsCount,
    TGuidelineList *outGuidelines,
    bool draw,
    bool enabledOnly ) const;
 
public:
  double magnetism;
  double sensitiveLength;
 
  explicit TModifierAssistants(double magnetism = 1);
 
  void modifyTrack( 
    const TTrack &track,
    TTrackList &outTracks ) override;
 
  TRectD calcDrawBounds(const TTrackList &tracks, const THoverList &hovers) override;
 
   void drawTrack(const TTrack &track) override;
   void draw(const TTrackList &tracks, const THoverList &hovers) override;
};
 
 
#endif