◆ layout_legend()

MAYAFLUX_API LegendLayout MayaFlux::Portal::Forma::Plot::layout_legend ( const LegendSpec & spec )

Expand a legend spec into swatch rectangle specs and text label specs.

Definition at line 346 of file PlotSpec.cpp.

{
    LegendLayout layout;
    layout.swatches.reserve(spec.entries.size());
    layout.labels.reserve(spec.entries.size());
 
    for (size_t i = 0; i < spec.entries.size(); ++i) {
        const float y_top = spec.origin.y
            - static_cast<float>(i) * (spec.row_h + spec.gap);
        const float y_bot = y_top - spec.row_h;
 
        const Kinesis::AABB2D swatch_bounds {
            .min = { spec.origin.x, y_bot },
            .max = { spec.origin.x + spec.swatch_w, y_top },
        };
 
        const Kinesis::AABB2D text_bounds {
            .min = { spec.origin.x + spec.swatch_w + spec.gap, y_bot },
            .max = { spec.origin.x + spec.swatch_w + spec.gap + spec.text_w, y_top },
        };
 
        layout.swatches.push_back(RectSpec {
            .bounds = swatch_bounds,
            .color = spec.entries[i].color,
            .name = spec.name_prefix + "_swatch_" + std::to_string(i),
            .interactive = spec.interactive,
        });
 
        layout.labels.push_back(LabelSpec {
            .text = spec.entries[i].label,
            .bounds = text_bounds,
            .color = spec.text_color,
            .name = spec.name_prefix + "_label_" + std::to_string(i),
            .interactive = spec.interactive,
        });
    }
 
    return layout;
}