import { DoCheck, ElementRef, EventEmitter, OnChanges, OnDestroy, OnInit, SimpleChanges } from "@angular/core";
import * as chartJs from "chart.js";
import { DatasetColor } from "./color";
import { ThemeService } from "./theme.service";
import * as i0 from "@angular/core";
export declare type SingleDataSet = number[] | chartJs.ChartPoint[];
export declare type MultiDataSet = (number[] | chartJs.ChartPoint[])[];
export declare type SingleOrMultiDataSet = SingleDataSet | MultiDataSet;
export declare type PluginServiceGlobalRegistrationAndOptions = chartJs.PluginServiceGlobalRegistration & chartJs.PluginServiceRegistrationOptions;
export declare type SingleLineLabel = string;
export declare type MultiLineLabel = string[];
export declare type ChartLabel = SingleLineLabel | MultiLineLabel;
export declare type ChartColor = DatasetColor[];
export declare type ChartType = chartJs.ChartType;
export declare type ChartDataset = chartJs.ChartDataSets;
export declare type ChartDatasets = chartJs.ChartDataSets[];
export declare type ChartOptions = chartJs.ChartOptions;
export declare class BaseChartDirective implements OnDestroy, OnChanges, OnInit, OnDestroy, DoCheck {
    private element;
    private themeService;
    data: SingleOrMultiDataSet;
    datasets: ChartDatasets;
    labels: ChartLabel[];
    options: ChartOptions;
    chartType: ChartType;
    colors: DatasetColor[];
    legend: boolean;
    plugins: PluginServiceGlobalRegistrationAndOptions[];
    chartClick: EventEmitter<{
        event?: MouseEvent;
        active?: {}[];
    }>;
    chartHover: EventEmitter<{
        event: MouseEvent;
        active: {}[];
    }>;
    ctx: string;
    chart: Chart;
    private old;
    private subs;
    /**
     * Register a plugin.
     */
    static registerPlugin(plugin: PluginServiceGlobalRegistrationAndOptions): void;
    static unregisterPlugin(plugin: PluginServiceGlobalRegistrationAndOptions): void;
    constructor(element: ElementRef, themeService: ThemeService);
    ngOnInit(): void;
    private themeChanged;
    ngDoCheck(): void;
    copyLabel(a: ChartLabel): ChartLabel;
    labelsEqual(a: ChartLabel, b: ChartLabel): boolean;
    copyColor(a: DatasetColor): DatasetColor;
    colorsEqual(a: DatasetColor, b: DatasetColor): boolean;
    updateColors(): void;
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
    update(duration?: any): {};
    hideDataset(index: number, hidden: boolean): void;
    isDatasetHidden(index: number): boolean;
    toBase64Image(): string;
    getChartConfiguration(): chartJs.ChartConfiguration;
    getChartBuilder(ctx: string): Chart;
    smartMerge(options: any, overrides: any, level?: number): any;
    private isMultiLineLabel;
    private joinLabel;
    private propagateDatasetsToData;
    private propagateDataToDatasets;
    private isMultiDataSet;
    private getDatasets;
    private refresh;
    static ɵfac: i0.ɵɵFactoryDeclaration<BaseChartDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<BaseChartDirective, "canvas[baseChart]", ["base-chart"], { "data": "data"; "datasets": "datasets"; "labels": "labels"; "options": "options"; "chartType": "chartType"; "colors": "colors"; "legend": "legend"; "plugins": "plugins"; }, { "chartClick": "chartClick"; "chartHover": "chartHover"; }, never, never, false>;
}