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4984ed85 | 1 | import React, { PropTypes } from 'react'; |
02de449a | 2 | import ReactDom from 'react-dom'; |
3 | import classnames from 'classnames'; | |
4 | ||
5 | const scrollTo = (element, to, duration) => { | |
0b9ef41f | 6 | const requestAnimationFrame = window.requestAnimationFrame || |
7 | function requestAnimationFrameTimeout() { | |
8 | return setTimeout(arguments[0], 10); | |
9 | }; | |
02de449a | 10 | // jump to target if duration zero |
11 | if (duration <= 0) { | |
12 | element.scrollTop = to; | |
13 | return; | |
14 | } | |
15 | const difference = to - element.scrollTop; | |
16 | const perTick = difference / duration * 10; | |
17 | ||
0b9ef41f | 18 | requestAnimationFrame(() => { |
02de449a | 19 | element.scrollTop = element.scrollTop + perTick; |
20 | if (element.scrollTop === to) return; | |
21 | scrollTo(element, to, duration - 10); | |
0b9ef41f | 22 | }); |
02de449a | 23 | }; |
24 | ||
25 | const Select = React.createClass({ | |
26 | propTypes: { | |
27 | prefixCls: PropTypes.string, | |
28 | options: PropTypes.array, | |
29 | selectedIndex: PropTypes.number, | |
30 | type: PropTypes.string, | |
31 | onSelect: PropTypes.func, | |
182e9fcc | 32 | onMouseEnter: PropTypes.func, |
02de449a | 33 | }, |
34 | ||
35 | componentDidMount() { | |
36 | // jump to selected option | |
37 | this.scrollToSelected(0); | |
38 | }, | |
39 | ||
1cd769a6 | 40 | componentDidUpdate(prevProps) { |
02de449a | 41 | // smooth scroll to selected option |
1cd769a6 | 42 | if (prevProps.selectedIndex !== this.props.selectedIndex) { |
43 | this.scrollToSelected(120); | |
44 | } | |
02de449a | 45 | }, |
46 | ||
8133e8cf | 47 | onSelect(value) { |
02de449a | 48 | const { onSelect, type } = this.props; |
02de449a | 49 | onSelect(type, value); |
50 | }, | |
51 | ||
52 | getOptions() { | |
8133e8cf | 53 | const { options, selectedIndex, prefixCls } = this.props; |
02de449a | 54 | return options.map((item, index) => { |
8133e8cf | 55 | const cls = classnames({ |
518b852e M |
56 | [`${prefixCls}-select-option-selected`]: selectedIndex === index, |
57 | [`${prefixCls}-select-option-disabled`]: item.disabled, | |
8133e8cf | 58 | }); |
518b852e M |
59 | let onclick = null; |
60 | if (!item.disabled) { | |
61 | onclick = this.onSelect.bind(this, +item.value); | |
62 | } | |
4984ed85 | 63 | return (<li |
64 | className={cls} | |
65 | key={index} | |
66 | onClick={onclick} | |
67 | disabled={item.disabled} | |
68 | > | |
69 | {item.value} | |
70 | </li>); | |
02de449a | 71 | }); |
72 | }, | |
73 | ||
74 | scrollToSelected(duration) { | |
75 | // move to selected item | |
76 | const select = ReactDom.findDOMNode(this); | |
77 | const list = ReactDom.findDOMNode(this.refs.list); | |
5fcf22e0 | 78 | let index = this.props.selectedIndex; |
02de449a | 79 | if (index < 0) { |
80 | index = 0; | |
81 | } | |
82 | const topOption = list.children[index]; | |
428cfa8d | 83 | const to = topOption.offsetTop; |
85d09ad3 | 84 | scrollTo(select, to, duration); |
02de449a | 85 | }, |
86 | ||
87 | render() { | |
88 | if (this.props.options.length === 0) { | |
89 | return null; | |
90 | } | |
91 | ||
92 | const { prefixCls } = this.props; | |
93 | ||
94 | return ( | |
4984ed85 | 95 | <div |
96 | className={`${prefixCls}-select`} | |
97 | onMouseEnter={this.props.onMouseEnter} | |
98 | > | |
02de449a | 99 | <ul ref="list">{this.getOptions()}</ul> |
100 | </div> | |
101 | ); | |
102 | }, | |
103 | }); | |
104 | ||
105 | export default Select; |