/** Categorical scale with bands (for bar/column). */
export declare class BandScale<T = unknown> {
    domain: T[];
    range: [number, number];
    paddingInner: number;
    paddingOuter: number;
    /**
     * How much of a band each category takes, 0..1, category by category. Every
     * category takes a whole one unless something says otherwise — an update
     * transition does, for the categories arriving and leaving: a band that
     * narrows to nothing lets its neighbours spread into the room it gives up,
     * instead of the whole axis snapping wider the moment it goes.
     */
    weights: number[] | undefined;
    constructor(domain?: T[], range?: [number, number]);
    /** Full band step of a whole band (width + inter-band gap) — for heatmap-like series. */
    get stepSize(): number;
    /**
     * Length one whole band takes, gap included. With weights it is the length a
     * band of weight 1 would take, and each band takes its own share of it.
     */
    private get unit();
    private get totalWeight();
    private weightAt;
    get bandwidth(): number;
    /** Width of one category's band — its own share, where the shares differ. */
    bandwidthOf(value: T): number;
    /** Share of a band a category holds, 0..1 — a whole one unless weights say otherwise. */
    weightOf(value: T): number;
    /** Left edge of the category band. */
    convert(value: T): number;
    /** Band center — for lines/markers/labels over categories. */
    center(value: T): number;
    ticks(): T[];
    private indexOf;
}
/** Default gap between group slots inside a band — fraction of the slot step. */
export declare const DEFAULT_GROUP_GAP = 0.1;
/**
 * Splits a band into slots for grouped series (bar, range-bar, box-plot,
 * radial-column): adjacent slots are separated by `gap` (fraction of the slot
 * step), the band edges stay flush. A single slot takes the whole band.
 */
export declare function groupSlot(bandwidth: number, group: {
    index: number;
    count: number;
} | undefined, gap?: number): {
    start: number;
    size: number;
};