import 'echarts/theme/dark';
import 'echarts/theme/infographic';
import 'echarts/theme/macarons';
import 'echarts/theme/roma';
import 'echarts/theme/shine';
import 'echarts/theme/vintage';
interface Item {
    name: string;
    value: [number, string, string];
    color: string;
    key: string;
    itemStyle: {
        normal: {
            color: string;
        };
    };
}
interface Ioption {
    y_data: string[];
    series_data: Item[];
}
export declare const p_tpl: string;
export default class Gantt extends HTMLElement {
    dom: ShadowRoot;
    private my_chart;
    private initialized;
    constructor();
    get_data_url(): string;
    connectedCallback(): void;
    disconnectedCallback(): void;
    attributeChangedCallback(_attrName: string, oldVal: string, newVal: string): void;
    protected destroy(): void;
    static readonly observedAttributes: string[];
    protected refresh(): Promise<void>;
    protected option(dom: ShadowRoot, _data: Ioption, x_data: string[]): void;
}
export {};