import type { HTMLDOMElement } from '../Renderer/DOMElementType';
import type Options from '../Options';
import Chart from './Chart.js';
declare module '../Options' {
    interface Options {
        isGantt?: boolean;
    }
}
/**
 * Gantt-optimized chart. Use {@link Highcharts.Chart|Chart} for common charts.
 *
 * @requires modules/gantt
 *
 * @class
 * @name Highcharts.GanttChart
 * @extends Highcharts.Chart
 */
declare class GanttChart extends Chart {
    /**
     * Initializes the chart. The constructor's arguments are passed on
     * directly.
     *
     * @function Highcharts.GanttChart#init
     *
     * @param {Highcharts.Options} userOptions
     *        Custom options.
     *
     * @param {Function} [callback]
     *        Function to run when the chart has loaded and all external
     *        images are loaded.
     *
     *
     * @emits Highcharts.GanttChart#event:init
     * @emits Highcharts.GanttChart#event:afterInit
     */
    init(userOptions: Partial<Options>, callback?: Chart.CallbackFunction): void;
}
declare namespace GanttChart {
    /**
     * The factory function for creating new gantt charts. Creates a new {@link
     * Highcharts.GanttChart|GanttChart} object with different default options
     * than the basic Chart.
     *
     * @example
     * // Render a chart in to div#container
     * let chart = Highcharts.ganttChart('container', {
     *     title: {
     *         text: 'My chart'
     *     },
     *     series: [{
     *         data: ...
     *     }]
     * });
     *
     * @function Highcharts.ganttChart
     *
     * @param {string|Highcharts.HTMLDOMElement} renderTo
     *        The DOM element to render to, or its id.
     *
     * @param {Highcharts.Options} options
     *        The chart options structure.
     *
     * @param {Highcharts.ChartCallbackFunction} [callback]
     *        Function to run when the chart has loaded and all external
     *        images are loaded. Defining a
     *        [chart.events.load](https://api.highcharts.com/highcharts/chart.events.load)
     *        handler is equivalent.
     *
     * @return {Highcharts.GanttChart}
     *         Returns the Chart object.
     */
    function ganttChart(a: (string | HTMLDOMElement | Options), b?: (Chart.CallbackFunction | Options), c?: Chart.CallbackFunction): GanttChart;
}
export default GanttChart;