123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325 |
- import _extends from 'babel-runtime/helpers/extends';
- import _Object$getPrototypeOf from 'babel-runtime/core-js/object/get-prototype-of';
- import _classCallCheck from 'babel-runtime/helpers/classCallCheck';
- import _createClass from 'babel-runtime/helpers/createClass';
- import _possibleConstructorReturn from 'babel-runtime/helpers/possibleConstructorReturn';
- import _inherits from 'babel-runtime/helpers/inherits';
- import React from 'react';
- import PropTypes from 'prop-types';
- import { int, innerHeight, innerWidth, outerHeight, outerWidth, parseBounds, isNumber } from './utils';
- var doc = document;
- var Dragger = function (_React$Component) {
- _inherits(Dragger, _React$Component);
- function Dragger() {
- var _ref;
- _classCallCheck(this, Dragger);
- for (var _len = arguments.length, props = Array(_len), _key = 0; _key < _len; _key++) {
- props[_key] = arguments[_key];
- }
- var _this = _possibleConstructorReturn(this, (_ref = Dragger.__proto__ || _Object$getPrototypeOf(Dragger)).call.apply(_ref, [this].concat(props)));
- _this.state = {
- /** x轴位移,单位是px */
- x: null,
- /** y轴位移,单位是px */
- y: null,
- /**鼠标点击元素的原始位置,单位是px */
- originX: 0,
- originY: 0,
- isUserMove: true,
- /**已经移动的位移,单位是px */
- lastX: 0,
- lastY: 0
- };
- _this.move = _this.move.bind(_this);
- _this.onDragEnd = _this.onDragEnd.bind(_this);
- return _this;
- }
- /** props end */
- /**
- * 初始变量设置
- */
- _createClass(Dragger, [{
- key: 'move',
- value: function move(event) {
- var _state = this.state,
- lastX = _state.lastX,
- lastY = _state.lastY;
- /* event.client - this.state.origin 表示的是移动的距离,
- * elX表示的是原来已经有的位移
- */
- var deltaX = event.clientX - this.state.originX + lastX;
- var deltaY = event.clientY - this.state.originY + lastY;
- var bounds = this.props.bounds;
- if (bounds) {
- /**
- * 如果用户指定一个边界,那么在这里处理
- */
- var NewBounds = typeof bounds !== 'string' ? bounds : parseBounds(bounds);
- /**
- * 网格式移动范围设定,永远移动 n 的倍数
- * 注意:设定移动范围的时候,一定要在判断bounds之前,否则会造成bounds不对齐
- */
- var grid = this.props.grid;
- if (Array.isArray(grid) && grid.length === 2) {
- deltaX = Math.round(deltaX / grid[0]) * grid[0];
- deltaY = Math.round(deltaY / grid[1]) * grid[1];
- }
- if (this.props.bounds === 'parent') {
- NewBounds = {
- left: int(this.parent.style.paddingLeft) + int(this.self.style.marginLeft) - this.self.offsetLeft,
- top: int(this.parent.style.paddingTop) + int(this.self.style.marginTop) - this.self.offsetTop,
- right: innerWidth(this.parent) - outerWidth(this.self) - this.self.offsetLeft + int(this.parent.style.paddingRight) - int(this.self.style.marginRight),
- bottom: innerHeight(this.parent) - outerHeight(this.self) - this.self.offsetTop + int(this.parent.style.paddingBottom) - int(this.self.style.marginBottom)
- };
- }
- /**
- * 保证不超出右边界和底部
- * keep element right and bot can not cross the bounds
- */
- if (isNumber(NewBounds.right)) deltaX = Math.min(deltaX, NewBounds.right);
- if (isNumber(NewBounds.bottom)) deltaY = Math.min(deltaY, NewBounds.bottom);
- /**
- * 保证不超出左边和上边
- * keep element left and top can not cross the bounds
- */
- if (isNumber(NewBounds.left)) deltaX = Math.max(deltaX, NewBounds.left);
- if (isNumber(NewBounds.top)) deltaY = Math.max(deltaY, NewBounds.top);
- }
- /**如果设置了x,y限制 */
- deltaX = this.props.allowX ? deltaX : 0;
- deltaY = this.props.allowY ? deltaY : 0;
- /**移动时回调,用于外部控制 */
- if (this.props.onMove) this.props.onMove(event, deltaX, deltaY);
- this.setState({
- x: deltaX,
- y: deltaY
- });
- }
- }, {
- key: 'onDragStart',
- value: function onDragStart(event) {
- /** 保证用户在移动元素的时候不会选择到元素内部的东西 */
- doc.body.style.userSelect = 'none';
- if (this.props.hasDraggerHandle) {
- if (event.target.className !== 'handle') return;
- }
- /**
- * 把监听事件的回掉函数,绑定在document上
- * 当设置边界的时候,用户鼠标会离开元素的范围
- * 绑定在document上可以使得其依旧能够监听
- * 如果绑定在元素上,则鼠标离开元素,就不会再被监听了
- */
- doc.addEventListener('mousemove', this.move);
- doc.addEventListener('mouseup', this.onDragEnd);
- if (this.props.bounds === 'parent' && (
- /**为了让 这段代码不会重复执行 */
- typeof this.parent === 'undefined' || this.parent === null)) {
- /**
- * 在这里我们将父节点缓存下来,保证当用户鼠标离开拖拽区域时,我们仍然能获取到父节点
- * what we do here is
- * making sure that we still can retrieve our parent when user's mouse left this node.
- */
- this.parent = event.currentTarget.offsetParent;
- /**
- * 我们自己
- * ourself
- */
- this.self = event.currentTarget;
- }
- this.props.onDragStart(this.state.x, this.state.y);
- this.setState({
- originX: event.clientX,
- originY: event.clientY,
- lastX: this.state.x,
- lastY: this.state.y
- });
- }
- }, {
- key: 'onDragEnd',
- value: function onDragEnd(event) {
- /** 取消用户选择限制,用户可以重新选择 */
- doc.body.style.userSelect = '';
- this.parent = null;
- this.self = null;
- doc.removeEventListener('mousemove', this.move);
- doc.removeEventListener('mouseup', this.onDragEnd);
- this.props.onDragEnd(event);
- }
- }, {
- key: 'componentDidMount',
- value: function componentDidMount() {
- /**
- * 这个函数只会调用一次
- * 这个只是一个临时的解决方案,因为这样会使得元素进行两次刷新
- */
- if (typeof this.props.x === 'number' && typeof this.props.y === 'number') {
- this.setState({
- x: this.props.x,
- y: this.props.y
- });
- }
- }
- }, {
- key: 'componentWillReceiveProps',
- value: function componentWillReceiveProps(nextProps) {
- /**
- * 外部props 改变的时候更新元素的内部位置
- * 这个api设计其实很不好
- * 以后可能会修改掉
- */
- var isUserMove = nextProps.isUserMove;
- if (!isUserMove) {
- if (typeof nextProps.x === 'number' && typeof nextProps.y === 'number') {
- this.setState({
- x: nextProps.x,
- y: nextProps.y,
- lastX: nextProps.x,
- lastY: nextProps.y
- });
- }
- }
- }
- }, {
- key: 'render',
- value: function render() {
- var _state2 = this.state,
- x = _state2.x,
- y = _state2.y;
- var _props = this.props,
- bounds = _props.bounds,
- style = _props.style,
- className = _props.className,
- others = _props.others;
- if (!this.props.isUserMove) {
- /**当外部设置其props的x,y初始属性的时候,我们在这里设置元素的初始位移 */
- x = this.props.x;
- y = this.props.y;
- }
- /**主要是为了让用户定义自己的className去修改css */
- var fixedClassName = typeof className === 'undefined' ? '' : className + ' ';
- return React.createElement(
- 'div',
- _extends({ className: fixedClassName + 'WrapDragger',
- style: _extends({}, style, { touchAction: 'none!important', transform: 'translate(' + x + 'px,' + y + 'px)' }),
- onMouseDown: this.onDragStart.bind(this),
- onMouseUp: this.onDragEnd.bind(this)
- }, others),
- React.cloneElement(React.Children.only(this.props.children), {})
- );
- }
- }]);
- return Dragger;
- }(React.Component);
- Dragger.propTypes = {
- /**
- * 给予元素一个x,y的初始位置,单位是px
- */
- x: PropTypes.number,
- y: PropTypes.number,
- /**
- * 拖动范围限制
- * 如果不规定范围,那么子元素就可以随意拖动不受限制
- * 1.可以提供自定义的范围限制
- * 2.也可以提供父类为边框的范围限制(string === parent)
- */
- bounds: PropTypes.oneOfType([PropTypes.shape({
- left: PropTypes.number,
- right: PropTypes.number,
- top: PropTypes.number,
- bottom: PropTypes.number
- }), PropTypes.string]),
- /**
- * 以网格的方式移动,每次移动并不是平滑的移动
- * [20,30],鼠标x轴方向移动了20 px ,y方向移动了30 px,整个子元素才会移动
- */
- grid: PropTypes.arrayOf(PropTypes.number),
- /**只允许移动x轴 */
- allowX: PropTypes.bool,
- /**只允许移动y轴 */
- allowY: PropTypes.bool,
- /**
- * 内部的移动拖拽把手
- * 拖拽把手className一定要设置成handle并且这个属性设置成true
- * <Dragger hasDraggerHandle={true}>
- * <div className={handle} >点击我拖动</div>
- * </Dragger>
- */
- hasDraggerHandle: PropTypes.bool,
- /**
- * 是否由用户移动
- * 可能是通过外部props改变
- */
- isUserMove: PropTypes.bool,
- /**
- * 生命周期回调
- */
- onDragStart: PropTypes.func,
- onMove: PropTypes.func,
- onDragEnd: PropTypes.func };
- Dragger.defaultProps = {
- allowX: true,
- allowY: true,
- hasDraggerHandle: false,
- isUserMove: true
- };
- var _default = Dragger;
- export default _default;
- ;
- var _temp = function () {
- if (typeof __REACT_HOT_LOADER__ === 'undefined') {
- return;
- }
- __REACT_HOT_LOADER__.register(doc, 'doc', 'app/src/Dragger.js');
- __REACT_HOT_LOADER__.register(Dragger, 'Dragger', 'app/src/Dragger.js');
- __REACT_HOT_LOADER__.register(_default, 'default', 'app/src/Dragger.js');
- }();
- ;
|