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PointsPath.js
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| import React from 'react'; | |
| import { View } from 'react-native'; | |
| import { dist, angle, pointPropTypes, add } from './pointUtils'; | |
| import { keyGen } from './keyUtils'; | |
| function toLine(pointA, pointB, color, opacity) { | |
| return ( | |
| <View | |
| key={keyGen(pointA, pointB)} | |
| style={[ | |
| createLine( | |
| dist(pointA, pointB), | |
| angle(pointA, pointB), | |
| color, | |
| opacity, | |
| pointA | |
| ) | |
| ]} | |
| /> | |
| ); | |
| } | |
| function drawPoint(point, color) { | |
| return ( | |
| <View | |
| key={keyGen(point, color)} | |
| style={createPoint(point, color)} | |
| /> | |
| ); | |
| } | |
| function PointsPath({ color, pointList, opacity, startingPoint }) { | |
| return ( | |
| <View style={styles.container}> | |
| {[...pointList.map((elem, i) => { | |
| if (i === pointList.length - 1) { | |
| return null; | |
| } | |
| return toLine( | |
| add(pointList[i], startingPoint), | |
| add(pointList[i + 1], startingPoint), | |
| color, | |
| opacity | |
| ); | |
| }), | |
| ...pointList.map((elem) => { | |
| return drawPoint(add(elem, startingPoint), color); | |
| })]} | |
| </View> | |
| ); | |
| } | |
| PointsPath.propTypes = { | |
| pointList: React.PropTypes.arrayOf(React.PropTypes.shape(pointPropTypes)), | |
| color: React.PropTypes.string.isRequired, | |
| opacity: React.PropTypes.number.isRequired, | |
| startingPoint: React.PropTypes.shape(pointPropTypes) | |
| }; | |
| export const createLine = (dist, angle, color, opacity, startingPoint) => { | |
| return { | |
| backgroundColor: color, | |
| height: 4, | |
| width: dist, | |
| bottom: dist * Math.sin(angle) / 2 + startingPoint.y, | |
| left: -dist * (1 - Math.cos(angle)) / 2 + startingPoint.x, | |
| position: 'absolute', | |
| opacity, | |
| transform: [ | |
| { rotate: `${(-1) * angle} rad` } | |
| ] | |
| }; | |
| }; | |
| export const createPoint = (coordinates, color, size = 8) => { | |
| return { | |
| backgroundColor: color, | |
| left: coordinates.x - 3, | |
| bottom: coordinates.y - 2, | |
| position: 'absolute', | |
| borderRadius: 50, | |
| width: size, | |
| height: size | |
| }; | |
| }; | |
| export default PointsPath; |
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