import { PickerColumn } from './type';
import { KeysType } from '../common';
export interface PickerOptions {
    defaultIndex?: number;
    keys?: KeysType;
    defaultPickerColumns?: PickerColumn;
    el: HTMLElement | HTMLDivElement | HTMLUListElement;
    onChange: (index: number) => void;
    swipeDuration?: string | number;
    prefixCls: string;
}
export declare function stopPropagation(event: Event): void;
export declare function preventDefault(event: Event, isStopPropagation?: boolean): void;
/**
 * constant var
 */
export declare const DEFAULT_ITEM_HEIGHT = 40;
export declare const ANIMATION_TIME_LIMIT = 460;
export declare const ANIMATION_DISTANCE_LIMIT = 15;
/**
 * @name picker
 * @description 阻尼参数来源iscroll5，灵感来自mui.picker
 * @param {[HTMLDivElement]} el   [picker-item的DOM元素]
 * @param {[Function]} onChange   [发生change事件时候的回调]
 * @param {[Number]} defaultIndex [picker-item开始的索引值]
 */
declare class Picker {
    holder: HTMLElement | HTMLUListElement;
    options: PickerOptions;
    list: HTMLUListElement | null;
    elementItems: HTMLLIElement[];
    height: number;
    curIndex: number;
    itemClassName: string;
    itemSelectedClassName: string;
    itemHeight: number;
    lastMoveTime: number;
    lastMoveStart: number;
    stopInertiaMove: boolean;
    startY: number;
    isPicking: boolean;
    offsetYOfStartBound: number;
    offsetYOfEndBound: number;
    offsetY: number;
    offsetYOfStart: number;
    offsetYOfEnd: number;
    curValue: string | null;
    onChange: (index: number) => void;
    itemGroupHeight: number;
    indicatorOffset: number;
    swipeDuration?: number | string;
    pickerColumns: PickerColumn;
    prefixCls: string;
    constructor(options: PickerOptions);
    init(): void;
    /**
     * @description 获取所有的列表DOM元素
     */
    updateItems(): void;
    /**
     * @description 初始化滚动参数
     */
    initScrollParams(): void;
    bindEvent(): void;
    touchStartHandler(event: TouchEvent): void;
    getCount(): number;
    getRange(thresholdA?: number, thresholdB?: number): {
        min: number;
        max: number;
    };
    touchMoveHandler(event: TouchEvent): void;
    touchEndHandler(event: TouchEvent): void;
    /**
     * @description 更新惯性参数
     * @param event
     * @param isStart
     */
    updateInertiaParams(event: TouchEvent, isStart: boolean): void;
    /**
     * @description 根据计算的物理惯性距离滚动
     * @param now
     * @param startOffsetY
     * @param dist
     * @param duration
     */
    scrollDist(now: number, startOffsetY: number, dist: number, duration: number): void;
    /**
     * @description 更新picker，一般当数据变化需要ui更新的时候调用
     */
    update(options?: any): void;
    /**
     * @description 更新picker索引，数据变化时调用
     * @param index
     * @param duration
     */
    updateIndex(index: number, options?: any): void;
    /**
     * @description 更新数据源
     */
    updateOptions(options?: PickerColumn): void;
    /**
     * @description 获取当前索引
     */
    getCurIndex(): number;
    /**
     * @description 适配3d， TBD
     * @param index
     */
    fix3d(index: number): void;
    /**
     * @description 设置item样式
     */
    setSelectedClassName(): void;
    /**
     * 设置当前picker的滚动位移
     * @param offsetY
     */
    setOffsetY(offsetY: number): void;
    /**
     * @description 结束滚动时的回调
     */
    endScroll(): void;
    destroy(): void;
}
export default Picker;