Method OnPaint

src/effects/DynamicRangeProcessorHistoryPanel.cpp:329–492

}

void DynamicRangeProcessorHistoryPanel::OnPaint(wxPaintEvent& evt)
{
   wxPaintDC dc(this);

   using namespace DynamicRangeProcessorPanel;

   const auto gc = MakeGraphicsContext(dc);
   const auto rect = DynamicRangeProcessorPanel::GetPanelRect(*this);
   const auto x = rect.GetX();
   const auto y = rect.GetY();
   const auto width = rect.GetWidth();
   const auto height = rect.GetHeight();

   gc->SetBrush(GetGraphBackgroundBrush(*gc, height));
   gc->SetPen(wxTransparentColor);
   gc->DrawRectangle(x, y, width, height);

   Finally Do { [&] {
      // The legend is causing problems color-wise, and in the end it may not be
      // so useful since the different elements of the graph can be toggled.
      // Keep it up our sleeve for now, though. (Anyone still sees this in the
      // not-so-near future, feel free to clean up.)
      constexpr auto drawLegend = false;
      if (drawLegend)
         DrawLegend(height, dc, *gc);
      gc->SetBrush(*wxTRANSPARENT_BRUSH);
      gc->SetPen(lineColor);
      gc->DrawRectangle(x, y, width, height);
   } };

   if (!mHistory || !mSync)
   {
      if (!mPlaybackAboutToStart)
      {
         const auto text = XO("awaiting playback");
         const wxDCFontChanger changer { dc,
                                         { 16, wxFONTFAMILY_DEFAULT,
                                           wxFONTSTYLE_NORMAL,
                                           wxFONTWEIGHT_NORMAL } };
         const auto textWidth = dc.GetTextExtent(text.Translation()).GetWidth();
         const auto textHeight =
            dc.GetTextExtent(text.Translation()).GetHeight();
         dc.SetTextForeground(wxColor { 128, 128, 128 });
         dc.DrawText(
            text.Translation(), (width - textWidth) / 2,
            (height - textHeight) / 2);
      }
      return;
   }

   const auto& segments = mHistory->GetSegments();
   const auto elapsedTimeSinceFirstPacket =
      std::chrono::duration<float>(mSync->now - mSync->start).count();
   const auto rangeDb = DynamicRangeProcessorPanel::GetGraphDbRange(height);
   const auto dbPerPixel = rangeDb / height;

   for (const auto& segment : segments)
   {