WaveformSettings.h

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/**********************************************************************
 
Audacity: A Digital Audio Editor
 
WaveformSettings.h
 
Paul Licameli
 
**********************************************************************/
 
#ifndef __AUDACITY_WAVEFORM_SETTINGS__
#define __AUDACITY_WAVEFORM_SETTINGS__
 
#include "ClientData.h" // to inherit
#include "Prefs.h"
 
class wxRect;
 
class EnumValueSymbols;
class WaveChannel;
class WaveTrack;
 
class AUDACITY_DLL_API WaveformSettings
   : public PrefsListener
   , public ClientData::Cloneable<>
{
public:
 
   static WaveformSettings &Get(const WaveTrack &track);
 
   static WaveformSettings &Get(const WaveChannel &channel);
 
   static void Set(
      WaveChannel &channel, std::unique_ptr<WaveformSettings> pSettings );
 
   // Singleton for settings that are not per-track
   class AUDACITY_DLL_API Globals
   {
   public:
      static Globals &Get();
      void SavePrefs();
 
   private:
      Globals();
      void LoadPrefs();
   };
 
   static WaveformSettings &defaults();
 
   WaveformSettings();
   WaveformSettings(const WaveformSettings &other);
   WaveformSettings& operator= (const WaveformSettings &other);
   ~WaveformSettings() override;
 
   PointerType Clone() const override;
 
   bool IsDefault() const
   {
      return this == &defaults();
   }
 
   bool Validate(bool quiet);
   void LoadPrefs();
   void SavePrefs();
   void Update();
 
   void UpdatePrefs() override;
 
   void ConvertToEnumeratedDBRange();
   void ConvertToActualDBRange();
   void NextLowerDBRange();
   void NextHigherDBRange();
 
   typedef int ScaleType;
   enum ScaleTypeValues : int {
      stLinearAmp,
      stLogarithmicDb,
      stLinearDb,
 
      stNumScaleTypes,
   };
 
   static const EnumValueSymbols &GetScaleNames();
 
   ScaleType scaleType;
   int dBRange;
 
   // Convenience
   bool isLinear() const { return scaleType == stLinearAmp || scaleType == stLinearDb; }
};
 
class AUDACITY_DLL_API WaveformScale
   : public ClientData::Cloneable<>
{
public:
   static WaveformScale &Get(const WaveTrack &track);
 
   static WaveformScale &Get(const WaveChannel &channel);
 
   ~WaveformScale() override;
   PointerType Clone() const override;
 
   int ZeroLevelYCoordinate(wxRect rect) const;
 
   void GetDisplayBounds(float &min, float &max) const
   { min = mDisplayMin; max = mDisplayMax; }
 
   void SetDisplayBounds(float min, float max)
   { mDisplayMin = min; mDisplayMax = max; }
 
   float GetLastScaleType() const { return mLastScaleType; }
   void SetLastScaleType(int type) { mLastScaleType = type; }
 
   int GetLastDBRange() const { return mLastdBRange; }
   void SetLastDBRange(int range) { mLastdBRange = range; }
 
private:
   float mDisplayMin = -1.0f, mDisplayMax = 1.0f;
   int mLastScaleType = -1;
   int mLastdBRange = -1;
};
 
#endif