import type { DataItem } from "../../core/render/Component";
import { Flow, IFlowSettings, IFlowDataItem, IFlowPrivate, IFlowEvents } from "./Flow";
import { RibbonGenerator, RibbonSubgroup, Ribbon } from "d3-chord";
import { ListTemplate } from "../../core/util/List";
import { ChordNodes, IChordNodesDataItem } from "./ChordNodes";
import { ChordLink } from "./ChordLink";
import { Percent } from "../../core/util/Percent";
export interface IChordDataItem extends IFlowDataItem {
    /**
     * The link element.
     */
    link: ChordLink;
    /**
     * Source node data item.
     */
    source: DataItem<IChordNodesDataItem>;
    /**
     * Target node data item.
     */
    target: DataItem<IChordNodesDataItem>;
}
export interface IChordSettings extends IFlowSettings {
    /**
     * Gap between adjacent nodes, in degrees.
     *
     * @default 1
     */
    padAngle?: number;
    /**
     * Outer radius of the node ring, in pixels or percent. A percent is of
     * half the smaller side of the series' area, so `100%` fills it.
     *
     * @default 90%
     */
    radius?: number | Percent;
    /**
     * Thickness of the node ring, in pixels, measured inward from `radius`.
     *
     * @default 10
     */
    nodeWidth?: number;
    /**
     * Angle where the first node starts, in degrees: `0` is at the right,
     * `-90` at the top. Nodes follow clockwise. Dragging a node changes it.
     *
     * @default 0
     */
    startAngle?: number;
    /**
     * How to sort nodes by their value. `"none"` keeps the order of the data.
     *
     * @default "none"
     */
    sort?: "ascending" | "descending" | "none";
}
export interface IChordPrivate extends IFlowPrivate {
}
export interface IChordEvents extends IFlowEvents {
}
/**
 * Chord diagram: nodes as arcs around a circle, linked by ribbons. A node's
 * arc shows its outgoing total, and a ribbon is as wide at each end as the
 * flow out of that end, so a one-way link narrows to a point at its target.
 * For one-way flows, see [[ChordDirected]].
 *
 * @see {@link https://www.amcharts.com/docs/v5/charts/flow-charts/} for more information
 * @important
 */
export declare class Chord extends Flow {
    static className: string;
    static classNames: Array<string>;
    /**
     * List of link elements; configure them all through `links.template`.
     */
    readonly links: ListTemplate<ChordLink>;
    /**
     * The series that holds the chord's nodes.
     */
    readonly nodes: ChordNodes;
    _settings: IChordSettings;
    _privateSettings: IChordPrivate;
    _dataItemSettings: IChordDataItem;
    _events: IChordEvents;
    _d3chord: import("d3-chord").ChordLayout;
    _chordLayout: {
        source: {
            index: number;
            startAngle: number;
            endAngle: number;
            value: number;
        };
        target: {
            index: number;
            startAngle: number;
            endAngle: number;
            value: number;
        };
    }[];
    _ribbon: RibbonGenerator<any, Ribbon, RibbonSubgroup>;
    protected _afterNew(): void;
    protected _fixRibbon(ribbon: RibbonGenerator<any, Ribbon, RibbonSubgroup>): void;
    /**
     * @ignore
     */
    makeLink(dataItem: DataItem<this["_dataItemSettings"]>): ChordLink;
    protected _makeMatrix(): number[][];
    _prepareChildren(): void;
    protected _getLinkPoints(link: ChordLink, linkRadius: number, chordLayoutItem: any): void;
    protected _updateLink(ribbon: RibbonGenerator<any, Ribbon, RibbonSubgroup>, link: ChordLink, linkRadius: number, chordLayoutItem: any): void;
}
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