declare type HueCallback = (alpha: number) => void;
declare class Hue {
    protected pareElement: HTMLElement;
    protected barEle: HTMLElement;
    protected cursorEle: HTMLElement;
    root: HTMLElement;
    currentHue: number;
    protected callback?: HueCallback;
    constructor(pareElement: HTMLElement, callback?: HueCallback);
    protected createBar(): HTMLDivElement;
    protected createCursorEle(): HTMLDivElement;
    private create;
    setHue(hue: number): void;
    private update;
    getCursorLeft(): number;
    setCallback(callback: HueCallback): void;
    listen(): void;
    hide(): void;
    show(): void;
}
export default Hue;