import { PsychartOptions, Datum, RegionName, DataOptions } from './types';
/**
 * Generates an interactive psychrometric chart with plotting capabilities.
 */
export declare class Psychart {
    /**
     * Psychart full configuration.
     */
    private readonly config;
    /**
     * Defines the string representations of the current unit system.
     */
    private readonly units;
    /**
     * Defines a scaling factor for humidity ratio.
     */
    private readonly scaleFactor;
    /**
     * Defines the base element to attach to the viewing window.
     */
    private readonly base;
    /**
     * This is the base SVG where Psychart is rendered.
     */
    private readonly svg;
    /**
     * Represents the legend for Psychart.
     */
    private readonly legend;
    /**
     * Legend definitions, which contains linear gradients.
     */
    private readonly legendDefs;
    /**
     * The base element for adding lines in the legend.
     */
    private readonly legendg;
    /**
     * Defines all the groups in the SVG ordered by layer.
     */
    private readonly g;
    /**
     * The data series plotted on Psychart with each of their last states and visibility toggles.
     */
    private series;
    /**
     * Helper function to return an array of region names and their corresponding tooltips.
     */
    static getRegionNamesAndTips(): Array<[RegionName, string]>;
    /**
     * Convert from Celsius to Fahrenheit.
     */
    private static CtoF;
    /**
     * Get a range of numbers used for an axis.
     */
    private static getRange;
    /**
     * Construct a new instance of `Psychart` given various configuration properties.
     */
    constructor(options?: Partial<PsychartOptions>);
    /**
     * Generate SVG path data from an array of psychrometric states.
     */
    private setPathData;
    /**
     * Draw an axis line given an array of psychrometric states.
     */
    private drawAxis;
    /**
     * Create a line to append onto a parent element.
     */
    private createLine;
    /**
     * Draw an axis label.
     */
    private drawLabel;
    /**
     * Create a label to append onto a parent element.
     */
    private createLabel;
    /**
     * Create a tooltip element.
     */
    private drawTooltip;
    /**
     * Add a line to the legend.
     */
    private addToLegend;
    /**
     * Compute the height of the legend, in pixels.
     */
    private getLegendHeight;
    /**
     * Remove all the children from an element.
     */
    private clearChildren;
    /**
     * Plot one psychrometric state onto the psychrometric chart.
     */
    plot(state: Datum, config?: Partial<DataOptions>): void;
    /**
     * Draw a line between 2 arbitrary points on Psychart.
     */
    drawLine(start: Datum, end: Datum, colorHex: string, weight?: number): void;
    /**
     * Draw a shaded region on Psychart.
     */
    private drawRegion;
    /**
     * Clear all plotted data from Psychart.
     */
    clearData(): void;
    /**
     * Return the HTML element to append on the parent.
     */
    getElement(): HTMLDivElement;
}