MeterPanelBase.cpp

Go to the documentation of this file.

/**********************************************************************
 
Audacity: A Digital Audio Editor
 
MeterPanelBase.cpp
 
Paul Licameli split from MeterPanel.cpp
 
**********************************************************************/
 
#include "MeterPanelBase.h"
#include "Meter.h"
#include <wx/weakref.h>
 
bool MeterPanelBase::s_AcceptsFocus{ false };
 
auto MeterPanelBase::TemporarilyAllowFocus() -> TempAllowFocus {
   s_AcceptsFocus = true;
   return TempAllowFocus{ &s_AcceptsFocus };
}
 
struct MeterPanelBase::Forwarder : Meter
{
   explicit Forwarder( MeterPanelBase *pOwner )
      : mOwner{ pOwner } {}
   ~Forwarder() override {}
 
   void Clear() override
   {
      if (mOwner)
         mOwner->Clear();
   }
   void Reset(double sampleRate, bool resetClipping) override
   {
      if (mOwner)
         mOwner->Reset( sampleRate, resetClipping );
   }
   void UpdateDisplay(unsigned numChannels,
                      unsigned long numFrames, const float *sampleData) override
   {
      if (mOwner)
         mOwner->UpdateDisplay( numChannels, numFrames, sampleData );
   }
   bool IsMeterDisabled() const override
   {
      if (mOwner)
         return mOwner->IsMeterDisabled();
      else
         return true;
   }
   float GetMaxPeak() const override
   {
      if (mOwner)
         return mOwner->GetMaxPeak();
      else
         return 0.0;
   }
 
   bool IsClipping() const override
   {
      if (mOwner)
         return mOwner->IsClipping();
      else
         return false;
   }
 
   int GetDBRange() const override
   {
      if (mOwner)
         return mOwner->GetDBRange();
      else
         return 0.0;
   }
 
   const wxWeakRef< MeterPanelBase > mOwner;
};
 
MeterPanelBase::~MeterPanelBase() = default;
 
void MeterPanelBase::Init()
{
   mForwarder = std::make_shared< Forwarder >( this );
}
 
std::shared_ptr<Meter> MeterPanelBase::GetMeter() const
{
   return mForwarder;
}