import { EventEmitter, OnChanges, OnDestroy, OnInit, SimpleChanges } from '@angular/core';
import type { EChartsOption } from 'echarts';
import * as i0 from "@angular/core";
/** Minimal chart handle — ngx-echarts passes the ECharts instance from `echarts.init`. */
type EChartsResizeHandle = {
    resize: () => void;
};
/**
 * Chart widget - wraps echarts with proper styling and loading states
 * Handles responsive sizing and dark mode automatically
 */
export declare class WidgetChartComponent implements OnInit, OnDestroy, OnChanges {
    options: EChartsOption;
    isLoading: boolean;
    isEmpty: boolean;
    emptyMessage?: string;
    chartType?: string;
    /** When true (default), donut charts are locked to the 540×304 design size. Set false in drill-down/modal views. */
    fillContainer: boolean;
    /**
     * Report / PDF / print preview: echarts fills the parent (no 540×304 lockup).
     * Use with `optionsForPrint()` from the parent. Dashboard tiles leave this false.
     */
    printOptimized: boolean;
    chartInitEvent: EventEmitter<EChartsResizeHandle>;
    private chartInstance;
    private themeObserver;
    private resizeRafId;
    get isConstrainedDonut(): boolean;
    ngOnInit(): void;
    ngOnDestroy(): void;
    ngOnChanges(changes: SimpleChanges): void;
    onChartInit(chart: EChartsResizeHandle): void;
    private scheduleResize;
    private resizeChart;
    static ɵfac: i0.ɵɵFactoryDeclaration<WidgetChartComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<WidgetChartComponent, "ui-widget-chart", never, { "options": { "alias": "options"; "required": true; }; "isLoading": { "alias": "isLoading"; "required": false; }; "isEmpty": { "alias": "isEmpty"; "required": false; }; "emptyMessage": { "alias": "emptyMessage"; "required": false; }; "chartType": { "alias": "chartType"; "required": false; }; "fillContainer": { "alias": "fillContainer"; "required": false; }; "printOptimized": { "alias": "printOptimized"; "required": false; }; }, { "chartInitEvent": "chartInitEvent"; }, never, never, true, never>;
}
export {};