Built with blockbuilder.org
Last active
September 23, 2017 04:52
-
-
Save mtranggit/46e44a33ff0419ee2076ef8d2437b8da to your computer and use it in GitHub Desktop.
Animate with the General Update Pattern in D3
This file contains 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
license: mit |
This file contains 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> | |
<head> | |
<meta charset="utf-8"> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<style> | |
body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
.chart { | |
background: lightgray; | |
border: 1px solid black; | |
} | |
rect { | |
fill: steelblue; | |
} | |
</style> | |
</head> | |
<body> | |
<div class="chart"></div> | |
<button onclick="render('math')">Math</button> | |
<button onclick="render('science')">Science</button> | |
<button onclick="render('language')">Language</button> | |
<script> | |
var data = [ | |
{ | |
"name": "Alice", | |
"math": 137, | |
"science": 62, | |
"language": 54 | |
}, | |
{ | |
"name": "Billy", | |
"math": null, | |
"science": 34, | |
"language": 85 | |
}, | |
{ | |
"name": "Cindy", | |
"math": 86, | |
"science": 48, | |
"language": null | |
}, | |
{ | |
"name": "David", | |
"math": 44, | |
"science": null, | |
"language": 65 | |
}, | |
{ | |
"name": "Emily", | |
"math": 59, | |
"science": 63, | |
"language": 29 | |
} | |
] | |
// Feel free to change or delete any of the code you see in this editor! | |
// var svg = d3.select("body").append("svg") | |
// .attr("width", 960) | |
// .attr("height", 500) | |
// svg.append("text") | |
// .text("Edit the code below to change me!") | |
// .attr("y", 200) | |
// .attr("x", 120) | |
// .attr("font-size", 36) | |
// .attr("font-family", "monospace") | |
var margin = { top: 10, right: 25, bottom: 35, left: 20 } | |
var width = 800 - margin.left - margin.right | |
var height = 600 - margin.top - margin.bottom | |
var svg = d3.select('.chart') | |
.append('svg') | |
.attr('width', width + margin.left + margin.right) | |
.attr('height', height + margin.top + margin.bottom) | |
.call(responsivefy) | |
.append('g') | |
.attr('transform', `translate(${margin.left}, ${margin.top})`) | |
var xScale = d3.scaleBand() | |
.domain(data.map(d => d.name)) | |
.range([0, width]) | |
.padding(0.2) | |
var xAxis = d3.axisBottom(xScale) | |
svg.append('g') | |
.attr('transform', `translate(0, ${height})`) | |
.call(xAxis) | |
var yScale = d3.scaleLinear() | |
.domain([0, 100]) | |
.range([height, 0]) | |
// var yAxis = d3.axisLeft(yScale) | |
// .ticks(10) | |
var yAxis = svg.append('g') | |
.attr('transform', `translate(${margin.left}, ${margin.top})`) | |
.call(d3.axisLeft(yScale)) | |
function render (subject = 'math') { | |
var t = d3.transition().duration(500); | |
var update = svg.selectAll('rect') | |
.data(data.filter(d => d[subject]), d => d.name); | |
update.exit() | |
.transition(t) | |
.attr('y', height) | |
.attr('height', 0) | |
.remove(); | |
yScale.domain([0, d3.max(data, d => d[subject])]) | |
yAxis | |
.transition(t) | |
.delay(1000) | |
.call(d3.axisLeft(yScale)) | |
update | |
.transition(t) | |
.delay(1000) | |
.attr('y', d => yScale(d[subject])) | |
.attr('height', d => height - yScale(d[subject])); | |
update | |
.enter() | |
.append('rect') | |
.attr('y', height) | |
.attr('height', 0) | |
.attr('x', d => xScale(d.name)) | |
.attr('width', d => xScale.bandwidth()) | |
.transition(t) | |
.delay(update.exit().size() ? 2000 : 0) | |
.attr('y', d => yScale(d[subject])) | |
.attr('height', d => height - yScale(d[subject])); | |
} | |
render(); | |
function responsivefy(svg) { | |
// get container + svg aspect ratio | |
var container = d3.select(svg.node().parentNode), | |
width = parseInt(svg.style("width")), | |
height = parseInt(svg.style("height")), | |
aspect = width / height; | |
// add viewBox and preserveAspectRatio properties, | |
// and call resize so that svg resizes on inital page load | |
svg.attr("viewBox", "0 0 " + width + " " + height) | |
.attr("preserveAspectRatio", "xMinYMid") | |
.call(resize); | |
// to register multiple listeners for same event type, | |
// you need to add namespace, i.e., 'click.foo' | |
// necessary if you call invoke this function for multiple svgs | |
// api docs: https://github.com/mbostock/d3/wiki/Selections#on | |
d3.select(window).on("resize." + container.attr("id"), resize); | |
// get width of container and resize svg to fit it | |
function resize() { | |
var targetWidth = parseInt(container.style("width")); | |
svg.attr("width", targetWidth); | |
svg.attr("height", Math.round(targetWidth / aspect)); | |
} | |
} | |
</script> | |
</body> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment