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Created January 8, 2018 13:09
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Pie Chart Update v4
Raw
.block
license: mit
Raw
data.tsv
region fruit count
East Apples 53245
West Apples 28479
South Apples 19697
North Apples 24037
Central Apples 40245
East Oranges 200
South Oranges 200
Central Oranges 200
Raw
index.html
<!DOCTYPE html>
<title>Updating pie chart d3 v4</title>
<meta charset="utf-8">
<style>
body {
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
margin: auto;
position: relative;
width: 960px;
}
text {
font: 10px sans-serif;
}
form {
position: absolute;
right: 10px;
top: 10px;
}
input {
margin: 0 7px;
}
</style>
<form></form>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var myDuration = 600;
var firstTime = true;
var width = 960,
height = 500,
radius = Math.min(width, height) / 2;
var width = 960,
height = 500,
radius = Math.min(width, height) / 2;
var color = d3.scaleOrdinal(d3.schemeCategory20);
var pie = d3.pie()
.value(function(d) { return d.count; })
.sort(null);
var arc = d3.arc()
.innerRadius(radius - 100)
.outerRadius(radius - 20);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
d3.tsv("data.tsv", type, function(error, data) {
var regionsByFruit = d3.nest()
.key(function(d) { return d.fruit; })
.entries(data)
.reverse();
var label = d3.select("form").selectAll("label")
.data(regionsByFruit)
.enter().append("label");
label.append("input")
.attr("type", "radio")
.attr("name", "fruit")
.attr("value", function(d) { return d.key; })
.on("change", change)
.filter(function(d, i) { return !i; })
.each(change)
.property("checked", true);
label.append("span")
.text(function(d) { return d.key; });
function change(region) {
var path = svg.selectAll("path");
var data0 = path.data(),
data1 = pie(region.values);
path = path.data(data1, key);
path
.transition()
.duration(myDuration)
.attrTween("d", arcTween)
path
.enter()
.append("path")
.each(function(d, i) {
var narc = findNeighborArc(i, data0, data1, key) ;
if(narc) {
this._current = narc;
this._previous = narc;
} else {
this._current = d;
}
})
.attr("fill", function(d,i) {
return color(d.data.region)
})
.transition()
.duration(myDuration)
.attrTween("d", arcTween)
path
.exit()
.transition()
.duration(myDuration)
.attrTween("d", function(d, index) {
var currentIndex = this._previous.data.region;
var i = d3.interpolateObject(d,this._previous);
return function(t) {
return arc(i(t))
}
})
.remove()
firstTime = false;
}
});
function key(d) {
return d.data.region;
}
function type(d) {
d.count = +d.count;
return d;
}
function findNeighborArc(i, data0, data1, key) {
var d;
if(d = findPreceding(i, data0, data1, key)) {
var obj = cloneObj(d)
obj.startAngle = d.endAngle;
return obj;
} else if(d = findFollowing(i, data0, data1, key)) {
var obj = cloneObj(d)
obj.endAngle = d.startAngle;
return obj;
}
return null
}
// Find the element in data0 that joins the highest preceding element in data1.
function findPreceding(i, data0, data1, key) {
var m = data0.length;
while (--i >= 0) {
var k = key(data1[i]);
for (var j = 0; j < m; ++j) {
if (key(data0[j]) === k) return data0[j];
}
}
}
// Find the element in data0 that joins the lowest following element in data1.
function findFollowing(i, data0, data1, key) {
var n = data1.length, m = data0.length;
while (++i < n) {
var k = key(data1[i]);
for (var j = 0; j < m; ++j) {
if (key(data0[j]) === k) return data0[j];
}
}
}
function arcTween(d) {
var i = d3.interpolate(this._current, d);
this._current = i(0);
return function(t) {
return arc(i(t))
}
}
function cloneObj(obj) {
var o = {};
for(var i in obj) {
o[i] = obj[i];
}
return o;
}
</script>
Raw
index2.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
margin: auto;
position: relative;
width: 960px;
}
text {
font: 10px sans-serif;
}
form {
position: absolute;
right: 10px;
top: 10px;
}
input {
margin: 0 7px;
}
</style>
<form></form>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
var width = 960,
height = 500,
radius = Math.min(width, height) / 2;
var color = d3.scale.category20();
var pie = d3.layout.pie()
.value(function(d) { return d.count; })
.sort(null);
var arc = d3.svg.arc()
.innerRadius(radius-40)
.outerRadius(radius-20);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
var path = svg.selectAll("path");
d3.tsv("data.tsv", type, function(error, data) {
var regionsByFruit = d3.nest()
.key(function(d) { return d.fruit; })
.entries(data)
.reverse();
var label = d3.select("form").selectAll("label")
.data(regionsByFruit)
.enter().append("label");
label.append("input")
.attr("type", "radio")
.attr("name", "fruit")
.attr("value", function(d) { return d.key; })
.on("change", change)
.filter(function(d, i) { return !i; })
.each(change)
.property("checked", true);
label.append("span")
.text(function(d) { return d.key; });
function change(region) {
var data0 = path.data(),
data1 = pie(region.values);
path = path.data(data1, key);
path.enter().append("path")
.each(function(d, i) { this._current = findNeighborArc(i, data0, data1, key) || d; })
.attr("fill", function(d) { return color(d.data.region); })
path.exit()
.datum(function(d, i) { return findNeighborArc(i, data1, data0, key) || d; })
.transition()
.duration(750)
.attrTween("d", arcTween)
.remove();
path.transition()
.duration(750)
.attrTween("d", arcTween);
}
});
function key(d) {
return d.data.region;
}
function type(d) {
d.count = +d.count;
return d;
}
function findNeighborArc(i, data0, data1, key) {
var d;
return (d = findPreceding(i, data0, data1, key)) ? {startAngle: d.endAngle, endAngle: d.endAngle}
: (d = findFollowing(i, data0, data1, key)) ? {startAngle: d.startAngle, endAngle: d.startAngle}
: null;
}
// Find the element in data0 that joins the highest preceding element in data1.
function findPreceding(i, data0, data1, key) {
var m = data0.length;
while (--i >= 0) {
var k = key(data1[i]);
for (var j = 0; j < m; ++j) {
if (key(data0[j]) === k) return data0[j];
}
}
}
// Find the element in data0 that joins the lowest following element in data1.
function findFollowing(i, data0, data1, key) {
var n = data1.length, m = data0.length;
while (++i < n) {
var k = key(data1[i]);
for (var j = 0; j < m; ++j) {
if (key(data0[j]) === k) return data0[j];
}
}
}
function arcTween(d,index) {
var i = d3.interpolate(this._current, d);
if(index === 1) console.log(this._current, i(0))
this._current = i(0);
return function(t) { return arc(i(t), index); };
}
</script>
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