73 lines
1.5 KiB
JavaScript
73 lines
1.5 KiB
JavaScript
import ColumnHeader from './column_header';
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import PureRenderMixin from 'react-addons-pure-render-mixin';
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const easingOutQuint = (x, t, b, c, d) => c*((t=t/d-1)*t*t*t*t + 1) + b;
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const scrollTop = (node) => {
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const startTime = Date.now();
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const offset = node.scrollTop;
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const targetY = -offset;
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const duration = 1000;
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let interrupt = false;
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const step = () => {
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const elapsed = Date.now() - startTime;
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const percentage = elapsed / duration;
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if (percentage > 1 || interrupt) {
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return;
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}
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node.scrollTop = easingOutQuint(0, elapsed, offset, targetY, duration);
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requestAnimationFrame(step);
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};
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step();
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return () => {
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interrupt = true;
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};
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};
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const Column = React.createClass({
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propTypes: {
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heading: React.PropTypes.string,
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icon: React.PropTypes.string,
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children: React.PropTypes.node
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},
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mixins: [PureRenderMixin],
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handleHeaderClick () {
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let node = ReactDOM.findDOMNode(this);
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this._interruptScrollAnimation = scrollTop(node.querySelector('.scrollable'));
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},
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handleWheel () {
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if (typeof this._interruptScrollAnimation !== 'undefined') {
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this._interruptScrollAnimation();
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}
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},
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render () {
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const { heading, icon, children } = this.props;
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let header = '';
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if (heading) {
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header = <ColumnHeader icon={icon} type={heading} onClick={this.handleHeaderClick} />;
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}
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return (
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<div className='column' onWheel={this.handleWheel}>
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{header}
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{children}
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</div>
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);
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}
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});
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export default Column;
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