Function DrawLegend

src/effects/DynamicRangeProcessorHistoryPanel.cpp:206–302

}

void DrawLegend(size_t height, wxPaintDC& dc, wxGraphicsContext& gc)
{
   using namespace DynamicRangeProcessorPanel;

   constexpr auto legendWidth = 16;
   constexpr auto legendHeight = 16;
   constexpr auto legendSpacing = 8;
   constexpr auto legendX = 5;
   const auto legendY = height - 5 - legendHeight;
   const auto legendTextX = legendX + legendWidth + 5;
   const auto legendTextHeight = dc.GetTextExtent("X").GetHeight();
   const auto legendTextYOffset = (legendHeight - legendTextHeight) / 2;
   const auto legendTextY = legendY + legendTextYOffset;

   struct LegendInfo
   {
      const wxColor color;
      const TranslatableString text;
   };

   std::vector<LegendInfo> legends = {
      { inputColor, XO("Input") },
      { outputColor, XO("Output") },
   };

   int legendTextXOffset = 0;
   dc.SetTextForeground(*wxBLACK);
   dc.SetFont(
      { 10, wxFONTFAMILY_DEFAULT, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL });
   for (const auto& legend : legends)
   {
      // First fill with background color so that transparent foreground colors
      // yield the same result as on the graph.
      gc.SetPen(*wxTRANSPARENT_PEN);
      gc.SetBrush(backgroundColor);
      gc.DrawRectangle(
         legendX + legendTextXOffset, legendY, legendWidth, legendHeight);

      gc.SetBrush(wxColor { legend.color.GetRGB() });
      gc.DrawRectangle(
         legendX + legendTextXOffset, legendY, legendWidth, legendHeight);

      gc.SetPen(lineColor);
      gc.SetBrush(*wxTRANSPARENT_BRUSH);
      gc.DrawRectangle(
         legendX + legendTextXOffset, legendY, legendWidth, legendHeight);

      dc.DrawText(
         legend.text.Translation(), legendTextX + legendTextXOffset,
         legendTextY);
      const auto legendTextWidth =
         dc.GetTextExtent(legend.text.Translation()).GetWidth();
      legendTextXOffset += legendWidth + 5 + legendTextWidth + legendSpacing;
   }

   const auto lineY = legendY + legendHeight / 2.;
   constexpr auto lineWidth = 24;