import { ChartBase } from '../base/chart.base';
import { ChartPoint, DateRange } from '../entities/chart-entities';
import { Option } from '@suntech-innovation/option';
import { MarketStatus } from '../../../entities';
export declare function getLineDates(line: ChartPoint[]): number[];
export declare class ChartHelper {
    static findClosesDatePoints(line: ChartPoint[], range: DateRange): DateRange;
    static findClosestIndex(line: number[], input: number): number;
    static filterLineForDateRange(line: ChartPoint[], { from, to }: DateRange): ChartPoint[];
    static isEqual<T>(i: T, j: T): boolean;
    static preventSameDate({ from, to }: DateRange, padding?: number): DateRange;
    static setPaddingsForPrice({ from, to }: Partial<DateRange>): DateRange;
    static compactStatuses(prices: ChartPoint[], output?: any[]): ChartPoint[];
    static findRangeByStatus(line: ChartPoint[], status: MarketStatus): ChartPoint[][];
    /**
     * returns value from 0 to 1 as percent of a position
     */
    static getPosition(value: number, { from, to }: DateRange, convert?: (i: number) => number): Option<number>;
    static shortNumber(n: number): string;
}
export declare class ChartPainter extends ChartBase {
    get nativeElement(): HTMLElement;
    render(args?: any): void;
    drawCircle(x: number, y: number, radius: number): void;
    drawTriangle(x: number, y: number, size: number): void;
    drawPlus(x: number, y: number, size: number): void;
    drawStar(cx: any, cy: any, spikes: any, outerRadius: any, innerRadius: any): void;
}