import { Highlight } from './Highlight';
import { IHighlighter } from './IHighlighter';
import { PieRadarChartBase } from '../charts/PieRadarChartBase';
import { Entry } from '../data/Entry';
import { DataSet } from '../data/DataSet';
import { ChartData } from '../data/ChartData';
export declare abstract class PieRadarHighlighter<E extends Entry, D extends DataSet<E>, T extends PieRadarChartBase<E, DataSet<E>, ChartData<E, D>>> implements IHighlighter {
    protected mChart: T;
    /**
     * buffer for storing previously highlighted values
     */
    protected mHighlightBuffer: Highlight[];
    constructor(chart: T);
    getHighlightsAtXValue(xVal: any, x?: any, y?: any): Highlight[];
    getHighlight(x: number, y: number): Highlight<Entry>[];
    /**
     * Returns the closest Highlight object of the given objects based on the touch position inside the chart.
     *
     * @param index
     * @param x
     * @param y
     * @return
     */
    protected abstract getClosestHighlight(index: any, x: number, y: number): Highlight;
}