import { DataRelation } from '../../data';
import { DrawerData, LayerOptions, LayerSankeyStyle, LayerStyle, Node, RectDrawerProps, TextDrawerProps } from '../../types';
import { LayerBase } from '../base';
type Key = 'node' | 'edge' | 'text';
type RibbonKey = 'x1' | 'y1' | 'x2' | 'y2' | 'x3' | 'y3' | 'x4' | 'y4';
export declare class LayerSankey extends LayerBase<Key> {
    private _data;
    private _style;
    protected textData: DrawerData<TextDrawerProps>[][];
    protected nodeData: (DrawerData<RectDrawerProps> & {
        meta: AnyObject;
        stackedEdgeLength: [0, 0];
        color: string;
    } & Node)[][];
    protected edgeData: (Record<RibbonKey, number> & {
        color: string;
        length: number;
    })[];
    get data(): Maybe<DataRelation>;
    get style(): LayerSankeyStyle;
    constructor(options: LayerOptions);
    setData(data: LayerSankey['data']): void;
    setStyle(style: LayerStyle<LayerSankeyStyle>): void;
    update(): void;
    private getPath;
    draw(): void;
}
export {};