1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
import React from 'react';
import ColumnHeader from './column_header';
import PropTypes from 'prop-types';
const easingOutQuint = (x, t, b, c, d) => c*((t=t/d-1)*t*t*t*t + 1) + b;
const scrollTop = (node) => {
const startTime = Date.now();
const offset = node.scrollTop;
const targetY = -offset;
const duration = 1000;
let interrupt = false;
const step = () => {
const elapsed = Date.now() - startTime;
const percentage = elapsed / duration;
if (percentage > 1 || interrupt) {
return;
}
node.scrollTop = easingOutQuint(0, elapsed, offset, targetY, duration);
requestAnimationFrame(step);
};
step();
return () => {
interrupt = true;
};
};
class Column extends React.PureComponent {
static propTypes = {
heading: PropTypes.string,
icon: PropTypes.string,
children: PropTypes.node,
active: PropTypes.bool,
hideHeadingOnMobile: PropTypes.bool
};
handleHeaderClick = () => {
const scrollable = this.node.querySelector('.scrollable');
if (!scrollable) {
return;
}
this._interruptScrollAnimation = scrollTop(scrollable);
}
handleWheel = () => {
if (typeof this._interruptScrollAnimation !== 'undefined') {
this._interruptScrollAnimation();
}
}
setRef = (c) => {
this.node = c;
}
render () {
const { heading, icon, children, active, hideHeadingOnMobile } = this.props;
let columnHeaderId = null
let header = '';
if (heading) {
columnHeaderId = heading.replace(/ /g, '-')
header = <ColumnHeader icon={icon} active={active} type={heading} onClick={this.handleHeaderClick} hideOnMobile={hideHeadingOnMobile} columnHeaderId={columnHeaderId}/>;
}
return (
<div
ref={this.setRef}
role='region'
aria-labelledby={columnHeaderId}
className='column'
onWheel={this.handleWheel}>
{header}
{children}
</div>
);
}
}
export default Column;
|
