Method UpdateDraw

src/effects/EqualizationUI.cpp:593–649

}

void EqualizationUI::UpdateDraw()
{
   auto &parameters = mCurvesList.mParameters;
   const auto &lin = parameters.mLin;
   auto &linEnvelope = parameters.mLinEnvelope;
   auto &logEnvelope = parameters.mLogEnvelope;
   const auto &hiFreq = parameters.mHiFreq;

   size_t numPoints = logEnvelope.GetNumberOfPoints();
   Doubles when{ numPoints };
   Doubles value{ numPoints };
   double deltadB = 0.1;
   double dx, dy, dx1, dy1, err;

   logEnvelope.GetPoints( when.get(), value.get(), numPoints );

   // set 'unnamed' as the selected curve
   mCurvesList.EnvelopeUpdated();

   bool flag = true;
   while (flag)
   {
      flag = false;
      int numDeleted = 0;
      logEnvelope.GetPoints( when.get(), value.get(), numPoints );
      for (size_t j = 0; j + 2 < numPoints; j++)
      {
         dx = when[j+2+numDeleted] - when[j+numDeleted];
         dy = value[j+2+numDeleted] - value[j+numDeleted];
         dx1 = when[j+numDeleted+1] - when[j+numDeleted];
         dy1 = dy * dx1 / dx;
         err = fabs(value[j+numDeleted+1] - (value[j+numDeleted] + dy1));
         if( err < deltadB )
         {   // within < deltadB dB?
            logEnvelope.Delete(j+1);
            numPoints--;
            numDeleted++;
            flag = true;
         }
      }
   }

   if(lin) // do not use IsLinear() here
   {
      mBands.EnvLogToLin();
      mFreqRuler->ruler.SetUpdater(&LinearUpdater::Instance());
      mFreqRuler->ruler.SetRange(0, hiFreq);
   }

   szrV->Show(szrG,false);
   szrH->Show(szrI,false);
   szrH->Show(szrL,true);

   mUIParent->Layout();
   wxGetTopLevelParent(mUIParent)->Layout();
   mCurvesList.ForceRecalc();     // it may have changed slightly due to the deletion of points
}