import type { IScaleConfig, GanttScaleData, IUnitFormats, IZoomConfig, TLengthUnit, IMarker, IData } from "./types";
import type GanttDataTree from "./GanttDataTree";
import { Day } from "date-fns";
export declare function getMinUnit(scales: IScaleConfig[]): IScaleConfig;
export declare const units: string[];
export declare function calcScales(prevStart?: Date, prevEnd?: Date, autoScale?: boolean, minUnit?: string, tasks?: GanttDataTree, markers?: IMarker[], projectStart?: Date, projectEnd?: Date, baselines?: boolean): {
    _start: Date;
    _end: Date;
};
export declare function resetScales(start: Date, end: Date, lengthUnit: TLengthUnit, width: number, height: number, _weekStart: Day, scales: IScaleConfig[], minLength: number): GanttScaleData | null;
export declare function normalizeZoom(zoom: boolean | IZoomConfig, unitFormats: IUnitFormats, scales: IScaleConfig[], cellWidth: number): {
    zoom: IZoomConfig;
    scales: IScaleConfig[];
    cellWidth: number;
};
export declare function zoomScale(zoom: IZoomConfig, step: number, level: number, nextUnit: any, lengthUnit: TLengthUnit, scales: IScaleConfig[], cellWidth: number): {
    scales: IScaleConfig[];
    cellWidth: number;
    lengthUnit: TLengthUnit;
    zoom: IZoomConfig;
};
export declare function expandScale(minWidth: number, state: Partial<IData>): Partial<IData>;
export declare function calcScaleDate(x: number, state: Partial<IData>): Date;