import type { Canvas2D, Context2D } from "../canvas-types";
import type { PlotRect } from "../../layout/plot-layout";
import type { GradientStop } from "../../theme/gradient";
import type { Vec3 } from "../../theme/palette";
import type { Theme } from "../../theme/theme";
import type { TreeChartBase } from "./tree-chart";
/**
 * Click target for one breadcrumb segment. Tree-chart hit-testing
 * checks `_breadcrumbRegions` first so a click on the trail re-roots
 * the view to that ancestor.
 */
export interface BreadcrumbRegion {
    nodeId: number;
    x0: number;
    y0: number;
    x1: number;
    y1: number;
}
/**
 * Paint the ancestor-path strip across the top of a tree chart and
 * record per-crumb hit regions on `chart._breadcrumbRegions`. Mirrors
 * the structure used by both treemap and sunburst — they only differ
 * in their hover-highlight geometry, so this strip is shared verbatim.
 */
export declare function renderBreadcrumbs(chart: TreeChartBase & {
    _breadcrumbRegions: BreadcrumbRegion[];
}, ctx: Context2D, cssWidth: number, fontFamily: string, textColor: string): void;
/**
 * Paint the lazy-tooltip box for a tree-chart node, anchored at
 * `(cx, cy)`. Returns early when no lines are cached for `nodeId`
 * (the lazy lookup hasn't resolved yet, or `nodeId` doesn't match the
 * currently-hovered target). Both treemap (rect-center) and sunburst
 * (arc-mid) charts only differ in how they compute the anchor.
 */
export declare function renderTreeTooltip(chart: TreeChartBase, ctx: Context2D, nodeId: number, cx: number, cy: number, cssWidth: number, cssHeight: number, fontFamily: string): void;
/**
 * Paint a color legend (categorical swatches or numeric gradient bar)
 * for a tree chart. Shared by sunburst + treemap; both consult
 * `_colorMode` / `_uniqueColorLabels.size` / `_colorMin..max` the same
 * way.
 *
 * `categoricalRect`, when non-null, is used as the explicit rect for
 * the categorical-swatch variant (sunburst's faceted mode passes
 * `FacetGrid.legendRect` here). Numeric mode always derives from a
 * synthetic single-plot `PlotLayout` to match the legacy per-chart
 * branch — its gradient bar's vertical span doesn't fit the
 * categorical legend's compact rect.
 *
 * Returns silently when the color slot is empty, when categorical mode
 * has only one label, or when numeric mode has a degenerate
 * (`min >= max`) extent.
 */
export declare function renderTreeColorLegend(chart: TreeChartBase, canvas: Canvas2D, palette: Vec3[], stops: GradientStop[], theme: Theme, cssWidth: number, cssHeight: number, categoricalRect?: PlotRect | null): void;