import { OnInit, SimpleChanges, EventEmitter } from '@angular/core';
import { Observable } from 'rxjs';
export declare class DonutChartComponent implements OnInit {
    /**
     * Prefix for the html elements id
     * @internal
     */
    idPrefix: string;
    /**
     * Data to display
     * Format: [text,value]
     * @internal
     */
    pieData: [string, number][];
    /**
     * Inner text to display
     * @internal
     */
    title: string;
    /**
     * Unit of the total count (meters, units, seconds...)
     * @internal
     */
    totalUnit: string;
    /**
     * Position of the chart legend
     * @internal
     */
    legendPosition: 'none' | 'bottom' | 'top' | 'left' | 'right' | 'labeled';
    /**
     * Style for the chart section tooltips
     * @internal
     */
    tooltipStyle: 'percentage' | 'value' | 'both';
    selected: EventEmitter<any>;
    /**
     * Observable to trigger a chart resize
     * @internal
     */
    resize: Observable<boolean>;
    private resizerCallback;
    private pieChart;
    constructor();
    ngOnInit(): void;
    ngAfterContentInit(): void;
    ngOnChanges(changes: SimpleChanges): void;
}