Function plot_grid

src/plot/grid.cc:47–87

};

ReturnCode plot_grid(
    Context* ctx,
    PlotConfig* plot,
    std::shared_ptr<GridlineDefinition> config) {
  MeasureConv conv;
  conv.dpi = layer_get_dpi(ctx);
  conv.font_size = layer_get_font_size(ctx);
  conv.parent_size = layer_get_font_size(ctx);

  measure_normalize(conv, &config->stroke_style.line_width);

  const auto& bbox = plot_get_clip(plot, layer_get(ctx));

  ScaleLayout slayout_x;
  config->layout_x(config->scale_x, format_noop(), &slayout_x);

  ScaleLayout slayout_y;
  config->layout_y(config->scale_y, format_noop(), &slayout_y);

  for (const auto& tick : slayout_x.positions) {
    auto line_x = bbox.x + bbox.w * tick;

    draw_line(
        ctx,
        Point(line_x, bbox.y),
        Point(line_x, bbox.y + bbox.h),
        config->stroke_style);
  }

  for (const auto& tick : slayout_y.positions) {
    auto line_y = bbox.y + bbox.h * (1.0 - tick);

    draw_line(
        ctx,
        Point(bbox.x, line_y),
        Point(bbox.x + bbox.w, line_y),
        config->stroke_style);
  }

  return OK;
}

ReturnCode plot_grid(Context* ctx, PlotConfig* plot, const Expr* expr) {
  /* set defaults from ctxironment */