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November 27, 2015 23:51
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.apple-tv-parllax-root { | |
border-radius: 5px; | |
transform-style: preserve-3d; | |
transform-origin: center center; | |
perspective-origin: center center; | |
-webkit-tap-highlight-color: rgba(0,0,0,.4); | |
} | |
.apple-tv-parllax-root, .apple-tv-parllax-wrap, .apple-tv-parllax-layers, .apple-tv-parllax-shadow, .apple-tv-parllax-shine { | |
display: block; | |
perspective: none; | |
} | |
.apple-tv-parllax-wrap, .apple-tv-parllax-layers { | |
position: relative; | |
width: 100%; | |
height: 100%; | |
border-radius: 5px; | |
} | |
.apple-tv-parllax-wrap { | |
transition: all 0.2s ease-out; | |
} | |
.apple-tv-parllax-layers { | |
overflow: hidden; | |
transform-style: preserve-3d; | |
} | |
.apple-tv-parllax-shadow { | |
position: absolute; | |
top: 5%; | |
left: 5%; | |
width: 90%; | |
height: 90%; | |
transition: all 0.2s ease-out; | |
} | |
.apple-tv-parllax-over .apple-tv-parllax-shadow { | |
box-shadow: 0 45px 100px rgba(14,21,47,0.4), 0 16px 40px rgba(14,21,47,0.4); | |
} | |
.apple-tv-parllax-shine { | |
position: absolute; | |
top: 0; | |
left: 0; | |
right: 0; | |
bottom: 0; | |
border-radius: 5px; | |
background: linear-gradient(135deg, rgba(255,255,255,.25) 0%,rgba(255,255,255,0) 60%); | |
} |
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/* @flow */ | |
/** | |
* Parent element with perspective attribute will not look great | |
*/ | |
import React, { Component } from "react"; | |
const cx = (...c) => c.filter(n => !!n).join(" "); | |
const styles = { | |
root: "apple-tv-parllax-root", | |
wrap: "apple-tv-parllax-wrap", | |
layers: "apple-tv-parllax-layers", | |
shadow: "apple-tv-parllax-shadow", | |
shine: "apple-tv-parllax-shine" | |
}; | |
export default class AppleTVParallax extends Component { | |
constructor(props, context) { | |
super(props, context); | |
this.scrollTop = 0; | |
this.scrollLeft = 0; | |
this.state = { | |
userIsInteracting: false | |
}; | |
} | |
_changeUserInteraction(userIsInteracting: boolean) { | |
return () => this.setState({ userIsInteracting }); | |
} | |
_updateScrollPos() { | |
this.scrollTop = document.body.scrollTop; | |
this.scrollLeft = document.body.scrollLeft; | |
} | |
_unstyleTransforms() { | |
const { layers, shine, wrap } = this; | |
const total = React.Children.count(this.props.children); | |
wrap.style.transform = shine.style.background = shine.style.transform = ""; | |
if (total > 1) { | |
for (var ly = 0, r = total; ly < total; ly++, r--) { | |
layers.children[ly].style.transform = ""; | |
} | |
} | |
} | |
parallaxOnInteraction(e) { | |
const { layers, shine, wrap, scrollTop, scrollLeft } = this; | |
const { left, top, width, height } = wrap.getBoundingClientRect(); | |
const total = React.Children.count(this.props.children); | |
let pageX = e.touches ? e.touches[0].pageX : e.pageX; | |
let pageY = e.touches ? e.touches[0].pageY : e.pageY; | |
let A = 320 / width; | |
let x = pageX - left - scrollLeft; | |
let y = pageY - top - scrollTop; | |
let pointerX = 0.52 - x / width; | |
let pointerY = 0.52 - y / height; | |
let dy = y - height / 2; | |
let dx = x - width / 2; | |
let yRotate = (pointerX - dx) * (0.07 * A); | |
let xRotate = (dy - pointerY) * (0.1 * A); | |
let angle = Math.max(0, Math.atan2(dy, dx) * 180 / Math.PI - 90); | |
requestAnimationFrame(() => { | |
wrap.style.transform = `rotateX(${xRotate}deg) rotateY(${yRotate}deg) scale3d(1.07,1.07,1.07)`; | |
shine.style.background = `linear-gradient(${angle}deg, rgba(255,255,255,${x / height * 0.4}) 0%, rgba(255,255,255,0) 80%)`; | |
shine.style.transform = `translateX(${(pointerX * total) - 0.1}px) translateY(${(pointerY * total) - 0.1}'px)`; | |
if (total > 1) { | |
for (var ly = 0, r = total; ly < total; ly++, r--) { | |
layers.children[ly].style.transform = | |
`translateX(${(pointerX * r) * ((ly * 2.5) / A)}px) translateY(${(pointerY * total) * ((ly * 2.5) / A)}px)` | |
} | |
} | |
}); | |
} | |
componentWillUpdate(nextProps, nextState) { | |
if (!nextState.userIsInteracting) { | |
requestAnimationFrame(this._unstyleTransforms.bind(this)); | |
} | |
} | |
componentDidMount() { | |
var { root } = this; | |
const { width } = root.getBoundingClientRect(); | |
const perspective = Math.max(5 * width, 1200); | |
root.style.transform = `perspective(${perspective}px)`; | |
root.style.perspective = perspective + "px"; | |
document.addEventListener("scroll", this._updateScrollPos.bind(this), false); | |
} | |
render() { | |
const { children, className } = this.props; | |
const { userIsInteracting } = this.state; | |
const interactionClassName = userIsInteracting ? styles.over : ""; | |
const parallaxOnInteraction = this.parallaxOnInteraction.bind(this); | |
return ( | |
<span className={cx(styles.root, className)} ref={e => this.root = e}> | |
<span | |
className={cx(styles.wrap, interactionClassName)} | |
onMouseEnter={this._changeUserInteraction(true)} | |
onMouseLeave={this._changeUserInteraction(false)} | |
onMouseMove={parallaxOnInteraction} | |
ref={e => this.wrap = e}> | |
<span className={styles.shadow} /> | |
<span className={styles.layers} ref={e => this.layers = e}> | |
{children} | |
</span> | |
<span className={styles.shine} ref={e => this.shine = e} /> | |
</span> | |
</span> | |
); | |
} | |
} | |
AppleTVParallax.propTypes = { | |
className: React.PropTypes.string | |
}; |
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