Method OnPaint

src/effects/ScienFilter.cpp:504–603

}

void EffectScienFilterPanel::OnPaint(wxPaintEvent & WXUNUSED(evt))
{
   wxPaintDC dc(this);
   int width, height;
   GetSize(&width, &height);

   if (!mBitmap || mWidth != width || mHeight != height)
   {
      mWidth = width;
      mHeight = height;
      mBitmap = std::make_unique<wxBitmap>(mWidth, mHeight,24);
   }

   wxBrush bkgndBrush(wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE));

   wxMemoryDC memDC;
   memDC.SelectObject(*mBitmap);

   wxRect bkgndRect;
   bkgndRect.x = 0;
   bkgndRect.y = 0;
   bkgndRect.width = mWidth;
   bkgndRect.height = mHeight;
   memDC.SetBrush(bkgndBrush);
   memDC.SetPen(*wxTRANSPARENT_PEN);
   memDC.DrawRectangle(bkgndRect);

   bkgndRect.y = mHeight;
   memDC.DrawRectangle(bkgndRect);

   wxRect border;
   border.x = 0;
   border.y = 0;
   border.width = mWidth;
   border.height = mHeight;

   memDC.SetBrush(*wxWHITE_BRUSH);
   memDC.SetPen(*wxBLACK_PEN);
   memDC.DrawRectangle(border);

   mEnvRect = border;
   mEnvRect.Deflate(2, 2);

   // Pure blue x-axis line
   memDC.SetPen(wxPen(theTheme.Colour(clrGraphLines), 1, wxPENSTYLE_SOLID));
   int center = (int) (mEnvRect.height * mDbMax / (mDbMax - mDbMin) + 0.5);
   AColor::Line(memDC,
                mEnvRect.GetLeft(), mEnvRect.y + center,
                mEnvRect.GetRight(), mEnvRect.y + center);

   //Now draw the actual response that you will get.
   //mFilterFunc has a linear scale, window has a log one so we have to fiddle about
   memDC.SetPen(wxPen(theTheme.Colour(clrResponseLines), 3, wxPENSTYLE_SOLID));
   double scale = (double) mEnvRect.height / (mDbMax - mDbMin);    // pixels per dB
   double yF;                                                     // gain at this freq

   double loLog = log10(mLoFreq);
   double step = log10(mHiFreq) - loLog;