D3Js Pie Charts made super easy: D3Pie

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“D3pie is a simple, highly configurable script built on d3.js for creating simple, attractive pie charts. It’s free, open source.”

If you have ever googled about high performance and deeply customizable charts, than for sure you have came across to D3 charts, D3 chart is such a big library and there are number of posts to implement them, there is no abstraction, you can add all your creativity and there is no limit.

Let’s see what d3Pie can do for your:

Configuration options include:

Pie / donut charts
Title, subtitle, footer text and control over placement
Inner and outer labels; choice of what data appears in each
Automatic percentage calculations
Unlimited data set size
Full control over font, font sizes, colors
Segment colors
Small segment grouping
Background color / transparency
Load, mouseover and click effects
Callbacks for click, mouseover, mouseout events
API for refreshing and recreating pie dynamically
Control over pie chart padding, pie chart x/y offsets

Now lets start with the implementation

Resources you need : only 2 libraries.

Create a simple index.html file and write this code in that and open with browser.

index.html

<html>
<head></head>
<body>
<div id="myPie"></div>
<script src="http://d3js.org/d3.v4.min.js" charset="utf-8">
<!-- <script src="https://d3js.org/d3-selection.v1.js"></script> -->

<script src="d3pie.js"></script>
<script src="d3.min.js"></script>
<script>
var pie = new d3pie("myPie", {
header: {
title: {
text: "A very simple example pie"
}
},
data: {
content: [
{ label: "JavaScript", value: 50 },
{ label: "Ruby", value: 20 },
{ label: "Java", value: 30},
]
},

//Here further operations/animations can be added like click event, cut out the clicked pie section.
callbacks: {
onMouseoverSegment: function(info) {
console.log("mouse in", info);
},
onMouseoutSegment: function(info) {
console.log("mouseout:", info);
}
}

});

</script>
</body>
</html>

This will generate the out put like:

Lets make it complex now:

notice the line in above code: “Here further operations/animations can be added like click event, cut out the clicked pie section.”

Let’s create a file complex.html and add this content.

complex.html

<html>
<head></head>
<body>
<div id="pie"></div>
<button id="addData"> Add Data </button>

<script src="http://d3js.org/d3.v4.min.js" charset="utf-8"></script>
<script src="https://code.jquery.com/jquery-3.2.1.min.js" crossorigin="anonymous"></script>

<script src="d3pie.js"></script>
<script src="d3.min.js"></script>
<script>
var data = [
{ label: "1", value: 1 },
{ label: "2", value: 4 },
{ label: "3", value: 3 }
];

var pie = new d3pie("pie", {
data: {
content: data
}
});

$(function() {
var num = 4;
$("#addData").on("click", function() {
data.push({
label: num.toString(),
value: Math.floor(Math.random() * 10) + 1
});

pie.updateProp("data.content", data);
num++;
});
});
</script>
</body>
</html>

This will generate the output like this: