Created
January 28, 2016 23:53
-
-
Save jonahwilliams/24c2fcf0cd0176fd2046 to your computer and use it in GitHub Desktop.
D3 Chart with React / d3-shape
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!doctype html> | |
| <html> | |
| <head> | |
| <title> D3 Shape Test</title> | |
| <style type="text/css"> | |
| path { | |
| stroke: black; | |
| fill: none; | |
| stroke-width: 0.5px; | |
| shape-rendering: optimizeQuality; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="app"></div> | |
| </body> | |
| <script src="index.js"></script> | |
| </html> |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import React from 'react'; | |
| import ReactDOM from 'react-dom'; | |
| import d3 from 'd3-shape'; | |
| // Recieves { data = [1, 2, 3, ...], width = height } | |
| class PieHolder extends React.Component { | |
| constructor(props) { | |
| super(props); | |
| this.makePie = this.makePie.bind(this); | |
| this.onMouseOut = this.onMouseOut.bind(this); | |
| this.onMouseOver = this.onMouseOver.bind(this); | |
| this.colors = ['#e41a1c','#377eb8','#4daf4a','#984ea3','#ff7f00','#ffff33','#a65628']; | |
| // minimal ui state - only effects this component and children | |
| this.state = { | |
| // currently selected (if any) element - the data not the dom | |
| selected : null | |
| }; | |
| } | |
| // This method takes our data from props, and computes each pathstring | |
| makePie() { | |
| const width = this.props.width; | |
| return d3 | |
| .pie()(this.props.data) | |
| .map(d => d3.arc()( | |
| { | |
| startAngle: d.startAngle, | |
| endAngle: d.endAngle, | |
| innerRadius: 100, | |
| outerRadius: width / 2 - 10, | |
| padAngle: 0.03 | |
| })); | |
| } | |
| // define event handlers on the parent holder component | |
| onMouseOver(e) { | |
| this.setState({ | |
| selected: this.props.data[+e.target.id] | |
| }); | |
| } | |
| onMouseOut(e) { | |
| this.setState({ selected : null }); | |
| } | |
| render() { | |
| const paths = this.makePie().map((d, i) => { | |
| return ( | |
| <path key={i} | |
| d={d} | |
| id={i} | |
| onMouseOut={this.onMouseOut} | |
| onMouseOver={this.onMouseOver} | |
| style={{fill: this.colors[i], opacity: "0.8"}}/>); | |
| }); | |
| const label = (<text x={-25} y={0}>{ this.state.selected !== null ? "Datum " + this.state.selected : "" }</text>) | |
| return ( | |
| <div> | |
| <svg height={this.props.height} | |
| width={this.props.width}> | |
| <g transform={`translate(${this.props.width / 2},${this.props.width / 2})`}> | |
| { label } | |
| { paths } | |
| </g> | |
| </svg> | |
| </div> | |
| ); | |
| } | |
| } | |
| ReactDOM.render( | |
| <PieHolder width={400} height={400} data={[1, 2, 3, 2, 9]}/>, | |
| document.getElementById('app') | |
| ); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment