EqualizationBandSliders.h

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/**********************************************************************
 
  Audacity: A Digital Audio Editor
 
  EqualizationBandSliders.h
 
  Mitch Golden
  Vaughan Johnson (Preview)
 
  Paul Licameli split from Equalization.h
 
***********************************************************************/
#ifndef __AUDACITY_EQUALIZATION_BAND_SLIDERS__
#define __AUDACITY_EQUALIZATION_BAND_SLIDERS__
 
#define NUMBER_OF_BANDS 31
#define NUM_PTS 180
 
#include "EqualizationCurvesList.h"
#include "EqualizationFilter.h"
#include <wx/event.h>
 
class wxSlider;
 
struct EqualizationBandSliders : public wxEvtHandler
{
public:
   EqualizationBandSliders(EqualizationCurvesList &curvesList);
   void Init();
   void AddBandSliders(ShuttleGui &S);
   void Flatten();
   void GraphicEQ(Envelope &env);
   void Invert();
   void EnvLogToLin();
   void EnvLinToLog();
   void ErrMin();
 
private:
   double mWhens[NUM_PTS]{};
   double mWhenSliders[NUMBER_OF_BANDS+1]{};
   size_t mBandsInUse{ NUMBER_OF_BANDS };
 
   int mSlidersOld[NUMBER_OF_BANDS]{};
   double mEQVals[NUMBER_OF_BANDS+1]{};
 
   wxSlider *mSliders[NUMBER_OF_BANDS]{};
 
   EqualizationCurvesList &mCurvesList;
 
   static void spline(double x[], double y[], size_t n, double y2[]);
   static
   double splint(double x[], double y[], size_t n, double y2[], double xr);
 
   // Convenience function template for binding event handler functions
   template<typename EventTag, typename Class, typename Event>
   void BindTo(
      wxEvtHandler &src, const EventTag& eventType, void (Class::*pmf)(Event &))
   {
      src.Bind(eventType, pmf, static_cast<Class *>(this));
   }
 
   void OnErase( wxEvent &event );
   void OnSlider( wxCommandEvent & event );
};
#endif