import { Property } from 'csstype';
import { ReactNode } from 'react';
export type DoughnutChartData = {
    name: string;
    value: number;
    color: Property.Color;
    index: number;
};
export type TooltipPosition = {
    x: number;
    y: number;
    angle?: number;
};
export declare const prepareChartData: (values: number[] | undefined, labels: string[] | undefined, palette: Property.Color[]) => DoughnutChartData[];
export declare const calculateTooltipPosition: (data: DoughnutChartData[], index: number, chartWidth: number, chartHeight: number) => TooltipPosition;
export declare const calculateTooltipPositionFromEvent: (cx: number, cy: number, midAngle: number, outerRadius: number) => TooltipPosition;
export declare const formatDisplayValue: (children: ReactNode | undefined, displayTotal: string | boolean | undefined, sumValues: number | undefined, valueFormatterFn: (value: number) => string) => ReactNode;
export declare const calculateSumValues: (values: number[] | undefined, displayTotal: string | boolean | undefined) => number | undefined;