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@kof's original JSSDemo PR didn't work on not-his machine. It depended on a version of `symbol-observable` that conflicted with the one we depend on. Now that I've identified and fixed that issue (with a `resolutions` field in `package.json`), it can be brought back. When cssinjs/jss#613 is fixed, the demo can be simplified further, because `foreground$` and `background$` can be directly assigned to their selectors.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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| /** @license | ||
| * Copyright 2016 - present The Material Motion Authors. All Rights Reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not | ||
| * use this file except in compliance with the License. You may obtain a copy | ||
| * of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the | ||
| * License for the specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
|
|
||
| import * as React from 'react'; | ||
|
|
||
| import jss from 'jss'; | ||
| import preset from 'jss-preset-default'; | ||
|
|
||
| import { | ||
| MaybeReactive, | ||
| NumericDict, | ||
| ObservableWithMotionOperators, | ||
| combineLatest, | ||
| subscribe, | ||
| } from 'material-motion'; | ||
|
|
||
| import { | ||
| combineStyleStreams, | ||
| getPointerEventStreamsFromElement, | ||
| viewportDimensions$, | ||
| } from 'material-motion-views-dom'; | ||
|
|
||
| import { | ||
| AttachStreams, | ||
| TransformTarget, | ||
| } from 'material-motion-views-react'; | ||
|
|
||
| jss.setup(preset()); | ||
|
|
||
| const createStyleSheet = ({ foreground$, background$ }) => { | ||
| // There's a bug in JSS 9.1 that only lets one selector have an observable | ||
| // value, so for now, we manually pluck the style values. | ||
| const sheet = jss.createStyleSheet( | ||
| { | ||
| container: { | ||
| touchAction: 'none', | ||
| width: '100vw', | ||
| height: '100vh', | ||
| overflow: 'hidden', | ||
| background: '#F7DF1E', | ||
| }, | ||
|
|
||
| foreground: { | ||
| transform: foreground$.pluck('transform'), | ||
| }, | ||
|
|
||
| background: { | ||
| transform: background$.pluck('transform'), | ||
| }, | ||
| }, | ||
| { | ||
| link: true, | ||
| } | ||
| ).attach(); | ||
|
|
||
| return sheet.classes; | ||
| }) | ||
|
|
||
| const getLayerTranslateStreams = () => { | ||
| const { | ||
| move$, | ||
| } = getPointerEventStreamsFromElement(document); | ||
|
|
||
| const centeredMove$ = move$.subtractedBy( | ||
| combineLatest<NumericDict, MaybeReactive<NumericDict>>({ | ||
| x: viewportDimensions$.pluck('width').dividedBy(2), | ||
| y: viewportDimensions$.pluck('height').dividedBy(2), | ||
| }) | ||
| ); | ||
|
|
||
| return { | ||
| background$: combineStyleStreams({ | ||
| translate$: centeredMove$.multipliedBy({ x: 1.125, y: 0.25 }), | ||
| }), | ||
|
|
||
| foreground$: combineStyleStreams({ | ||
| translate$: centeredMove$.multipliedBy({ x: .75, y: 0.11 }), | ||
| }), | ||
| }; | ||
| } | ||
|
|
||
| export class JSSDemo extends React.Component<{}, {}> { | ||
| classes = createStyleSheet(getLayerTranslateStreams()); | ||
|
|
||
| render() { | ||
| return ( | ||
| <div className = { this.classes.container }> | ||
| <RandomLogos | ||
| className = { this.classes.foreground } | ||
| scale = { 3 } | ||
| /> | ||
|
|
||
| <RandomLogos | ||
| className = { this.classes.background } | ||
| scale = { 5 } | ||
| /> | ||
| </div> | ||
| ); | ||
| } | ||
| } | ||
| export default JSSDemo; | ||
|
|
||
| // Since JSS uses `<style>` elements, it doesn't force its children to rerender | ||
| // on each frame. That allows this otherwise-expensive component to be | ||
| // functional, since it will never be re-rendered. | ||
| function RandomLogos({ scale, ...propsPassthrough }) { | ||
| return ( | ||
| <div | ||
| style = { | ||
| { | ||
| position: 'relative', | ||
| } | ||
| } | ||
| { ...propsPassthrough } | ||
| > | ||
| { | ||
| new Array(100).fill().map( | ||
| (_, i) => ( | ||
| <div | ||
| key = { i } | ||
| style = { | ||
| { | ||
| position: 'absolute', | ||
| color: '#222222', | ||
| fontWeight: 'bold', | ||
| transform: ` | ||
| translate( | ||
| ${ Math.round(Math.random() * 500 - 200) / 2 }vw, | ||
| ${ Math.round(Math.random() * 200) / 2 }vh | ||
| ) | ||
| scale(${ scale }) | ||
| `, | ||
| userSelect: 'none', | ||
| } | ||
| } | ||
| > | ||
| JSS | ||
| </div> | ||
| ) | ||
| ) | ||
| } | ||
| </div> | ||
| ); | ||
| } |
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