import React from 'react';
import PropTypes from 'prop-types';
export declare class NumberLineGraph extends React.Component {
    static propTypes: {
        domain: PropTypes.Validator<NonNullable<PropTypes.InferProps<{
            min: PropTypes.Validator<number>;
            max: PropTypes.Validator<number>;
        }>>>;
        ticks: PropTypes.Validator<NonNullable<PropTypes.InferProps<{
            minor: PropTypes.Requireable<number>;
            major: PropTypes.Requireable<number>;
        }>>>;
        fraction: PropTypes.Requireable<boolean>;
        width: PropTypes.Validator<number>;
        height: PropTypes.Validator<number>;
        onToggleElement: PropTypes.Validator<(...args: any[]) => any>;
        onMoveElement: PropTypes.Validator<(...args: any[]) => any>;
        onAddElement: PropTypes.Validator<(...args: any[]) => any>;
        debug: PropTypes.Requireable<boolean>;
        elements: PropTypes.Requireable<any[]>;
        disabled: PropTypes.Requireable<boolean>;
        onDeselectElements: PropTypes.Requireable<(...args: any[]) => any>;
        arrows: PropTypes.Requireable<PropTypes.InferProps<{
            left: PropTypes.Requireable<boolean>;
            right: PropTypes.Requireable<boolean>;
        }>>;
        language: PropTypes.Requireable<string>;
    };
    static defaultProps: {
        debug: boolean;
    };
    constructor(props: any);
    descriptionId: string;
    dragInstructionsId: string;
    xScaleFn(): any;
    snapValueFn(): (value: any) => number;
    /**
     * Note: we use d3 click + pointer to give us domain values directly.
     * Saves us having to calculate them ourselves from a MouseEvent.
     */
    onRectClick(event: any): void;
    componentDidMount(): void;
    addElement(x: any): void;
    render(): React.JSX.Element;
}
export default NumberLineGraph;