import { OnInit } from '@angular/core';
import { ChartOptions, ChartType } from 'chart.js';
import { Label, SingleDataSet } from 'ng2-charts';
export declare class PieChartComponent implements OnInit {
    data: any;
    questionNumber: any;
    chartRootElement: any;
    chartCanvas: any;
    pieChartOptions: ChartOptions;
    pieChartLabels: Label[];
    pieChartData: SingleDataSet;
    pieChartType: ChartType;
    pieChartLegend: boolean;
    chartColors: Array<any>;
    constructor();
    ngOnInit(): void;
}