MeterPanelBase.h

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/**********************************************************************
 
Audacity: A Digital Audio Editor
 
MeterPanelBase.h
 
Paul Licameli split from MeterPanel.h
 
**********************************************************************/
 
#ifndef __AUDACITY_METER_PANEL_BASE__
#define __AUDACITY_METER_PANEL_BASE__
 
#include <utility>
#include "wxPanelWrapper.h"
 
class Meter;
 
 
class AUDACITY_DLL_API MeterPanelBase /* not final */
   : public wxPanelWrapper
{
public:
   using wxPanelWrapper::wxPanelWrapper;
   ~MeterPanelBase() override;
 
   template< typename ...Args >
      MeterPanelBase( Args &&...args )
         : wxPanelWrapper( std::forward<Args>(args)... )
      { Init(); }
 
   std::shared_ptr<Meter> GetMeter() const;
 
   virtual void Clear() = 0;
   virtual void Reset(double sampleRate, bool resetClipping) = 0;
   virtual void UpdateDisplay(unsigned numChannels,
                      int numFrames, const float *sampleData) = 0;
   virtual bool IsMeterDisabled() const = 0;
   virtual float GetMaxPeak() const = 0;
   virtual bool IsClipping() const = 0;
   virtual int GetDBRange() const = 0;
 
private:
   static bool s_AcceptsFocus;
   struct Resetter { void operator () (bool *p) const { if(p) *p = false; } };
   using TempAllowFocus = std::unique_ptr<bool, Resetter>;
 
   bool AcceptsFocus() const override { return s_AcceptsFocus; }
   bool AcceptsFocusFromKeyboard() const override { return true; }
 
public:
   static TempAllowFocus TemporarilyAllowFocus();
 
private:
   void Init();
 
   struct Forwarder;
   std::shared_ptr<Forwarder> mForwarder;
};
 
#endif