Bubble chart created with d3Kit v3.
forked from kristw's block: d3Kit - Reusable chart
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November 9, 2016 21:49
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d3Kit - Reusable <canvas> chart
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| license: mit |
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| <!DOCTYPE html> | |
| <title>blockup</title> | |
| <link href='style.css' rel='stylesheet' /> | |
| <body> | |
| <button id="data-btn">Change data</button> | |
| <button id="resize-btn">Resize</button> | |
| <div id="chart"></div> | |
| <div id="info"></div> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://rawgit.com/twitter/d3kit/master/dist/d3kit.min.js"></script> | |
| <script src="https://unpkg.com/[email protected]/browser.min.js"></script> | |
| <script type="text/babel" src="MyChart.js"></script> | |
| <script type="text/babel" src='main.js'></script> | |
| </body> |
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| //--------------------------------------------------- | |
| // Generate random data | |
| //--------------------------------------------------- | |
| function generateBubbles() { | |
| const array = []; | |
| for(let i=0;i<100;i++){ | |
| array.push({ | |
| x: Math.random()*100, | |
| y: Math.random()*100, | |
| r: Math.random()*5+3 | |
| }); | |
| } | |
| return array; | |
| } | |
| const bubbles = generateBubbles(); | |
| //--------------------------------------------------- | |
| // Use the bubble chart | |
| //--------------------------------------------------- | |
| const chart = new MyChart('#chart', { | |
| margin: { top: 20 }, | |
| initialWidth: 300, | |
| initialHeight: 300, | |
| pixelRatio: 1 | |
| }) | |
| .data(bubbles) | |
| // handle bubbleClick event | |
| .fit({ | |
| width: '100%', | |
| height: 300 | |
| }, true); | |
| //--------------------------------------------------- | |
| // Buttons | |
| //--------------------------------------------------- | |
| document.querySelector('#data-btn') | |
| .addEventListener('click', () => { | |
| chart.data(generateBubbles()); | |
| }) | |
| let i = 1; | |
| document.querySelector('#resize-btn') | |
| .addEventListener('click', () => { | |
| chart.dimension([200 * i, 200 * i]); | |
| i = i===1 ? 2 : 1; | |
| }) |
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| const { scaleLinear, scaleOrdinal, schemeCategory10 } = d3; | |
| const { extent } = d3; | |
| const { CanvasChart, helper } = d3Kit; | |
| class MyChart extends CanvasChart { | |
| static getDefaultOptions() { | |
| return helper.deepExtend( | |
| super.getDefaultOptions(), | |
| { | |
| margin: {top: 60, right: 60, bottom: 60, left: 60}, | |
| initialWidth: 800, | |
| initialHeight: 460 | |
| } | |
| ); | |
| } | |
| /** | |
| * Define the names of custom events that can be dispatched from this chart | |
| * @return {Array[String]} event names | |
| */ | |
| static getCustomEventNames() { | |
| return []; | |
| } | |
| constructor(selector, options) { | |
| super(selector, options); | |
| // add custom variables | |
| this.xScale = scaleLinear(); | |
| this.yScale = scaleLinear(); | |
| this.color = scaleOrdinal(schemeCategory10); | |
| // add basic event listeners | |
| this.visualize = this.visualize.bind(this); | |
| this.on('resize.default', this.visualize); | |
| this.on('data.default', this.visualize); | |
| } | |
| // You can define a new function for this class. | |
| visualize() { | |
| this.clear(); | |
| if(!this.hasData()){ | |
| return; | |
| } | |
| const data = this.data(); | |
| this.xScale.domain(extent(data, d => d.x)) | |
| .range([0, this.getInnerWidth()]); | |
| this.yScale.domain(extent(data, d => d.y)) | |
| .range([this.getInnerHeight(), 0]); | |
| const ctx = this.getContext2d(); | |
| data.forEach((d,i) => { | |
| ctx.fillStyle = this.color(i); | |
| ctx.fillRect( | |
| this.xScale(d.x) - d.r, | |
| this.yScale(d.y) - d.r, | |
| d.r * 2, | |
| d.r * 2 | |
| ); | |
| }); | |
| } | |
| } | |
| window.MyChart = MyChart; |
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