Is it possible to create a multi-layer pie chart using d3.js with the following design?
https://i.sstatic.net/cAZp3.png
In this pie chart, each section may or may not have an inner subsection. If there is a subsection, it should be displayed in a darker color compared to the outer section as shown in the image.
I've been searching for ways to create a multilayer pie chart but so far I could only achieve this:
Below is the corresponding JavaScript code:
var dataset = {
final: [7000],
process: [1000, 1000, 1000, 7000],
initial: [10000],
};
var width = 660,
height = 500,
cwidth = 75;
var color = d3.scale.category20();
var pie = d3.layout.pie()
.sort(null);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("class","wrapper")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")")
var gs = svg.selectAll("g.wrapper").data(d3.values(dataset)).enter()
.append("g")
.attr("id",function(d,i){
return Object.keys(dataset)[i];
});
var gsLabels = svg.selectAll("g.wrapper").data(d3.values(dataset)).enter()
.append("g")
.attr("id",function(d,i){
return "label_" + Object.keys(dataset)[i];
});
var count = 0;
var path = gs.selectAll("path")
.data(function(d) { return pie(d); })
.enter().append("path")
.attr("fill", function(d, i) { return color(i); })
.attr("d", function(d, i, j) {
d._tmp = d.endAngle;
d.endAngle = d.startAngle;
if(Object.keys(dataset)[j] === "final"){
d.arc = d3.svg.arc().innerRadius(cwidth*j).outerRadius(cwidth*(j+1));
}
else{
d.arc = d3.svg.arc().innerRadius(10+cwidth*j).outerRadius(cwidth*(j+1));
}
return d.arc(d);
})
.transition().delay(function(d, i, j) {
return i * 500;
}).duration(500)
.attrTween('d', function(d,x,y) {
var i = d3.interpolate(d.startAngle, d._tmp);
return function(t) {
d.endAngle = i(t);
return d.arc(d);
}
});
Your help is greatly appreciated.