Method Recalc

src/FreqWindow.cpp:943–997

}

void FrequencyPlotDialog::Recalc()
{
   if (!mData || mDataLen < mWindowSize) {
      DrawPlot();
      return;
   }

   SpectrumAnalyst::Algorithm alg =
      SpectrumAnalyst::Algorithm(mAlgChoice->GetSelection());
   int windowFunc = mFuncChoice->GetSelection();

   wxWindow *hadFocus = FindFocus();
   // In wxMac, the skipped window MUST be a top level window.  I'd originally made it
   // just the mProgress window with the idea of preventing user interaction with the
   // controls while the plot was being recalculated.  This doesn't appear to be necessary
   // so just use the top level window instead.
   {
      std::optional<wxWindowDisabler> blocker;
      if (IsShown())
         blocker.emplace(this);
      wxYieldIfNeeded();

      auto first = true;
      auto progress = [&](long long num, long long den) {
         if (first) {
            mProgress->SetRange(den);
            first = false;
         }
         mProgress->SetValue(num);
      };

      mAnalyst->Calculate(alg, windowFunc, mWindowSize, mRate,
         mData.get(), mDataLen,
         &mYMin, &mYMax, std::move(progress));

      mProgress->Reset();
   }
   if (hadFocus) {
      hadFocus->SetFocus();
   }

   if (alg == SpectrumAnalyst::Spectrum) {
      if(mYMin < -dBRange)
         mYMin = -dBRange;
      if(mYMax <= -dBRange)
         mYMax = -dBRange + 10.; // it's all out of range, but show a scale.
      else
         mYMax += .5;
   }

   // Prime the scrollbar
   mPanScroller->SetScrollbar(0, (mYMax - mYMin) * 100, (mYMax - mYMin) * 100, 1);

   DrawPlot();
}

void FrequencyPlotDialog::OnExport(wxCommandEvent & WXUNUSED(event))
{