I'm looking to create a pie chart with floating labels using D3. I'm new to D3 and I'm not even sure this is possible? Can you use the labels of one graph in another somehow? If you can, can you point me to an example?
Shorter Explanation: I want labels from: http://bl.ocks.org/1691430
...to be on a pie chart.
Here's the code I was running below: Or in a JSBIN: http://jsbin.com/awilak/1/edit
If I understand his code correctly, this is the section that adds the labels. I don't understand what the labelForce.update does. From there, I don't care about transition, so that line isn't needed. Then the rest is just drawing the circles and adds a link / line? If someone could integrate that would be amazing but if you can help me understand what's going on and what I'm missing I'd be more than grateful.
// Now for the labels
// This is the only function call needed, the rest is just drawing the labels
anchors.call(labelForce.update)
labels = svg.selectAll(".labels")
.data(data, function(d,i) {return i;})
labels.exit()
.attr("class","exit")
.transition()
.delay(0)
.duration(500)
.style("opacity",0)
.remove();
// Draw the labelbox, caption and the link
newLabels = labels.enter().append("g").attr("class","labels")
newLabelBox = newLabels.append("g").attr("class","labelbox")
newLabelBox.append("circle").attr("r",11)
newLabelBox.append("text").attr("class","labeltext").attr("y",6)
newLabels.append("line").attr("class","link")
labelBox = svg.selectAll(".labels").selectAll(".labelbox")
links = svg.selectAll(".link")
labelBox.selectAll("text").text(function(d) { return d.num})
}
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<title>Testing Pie Chart</title>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?2.1.3"></script>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.geom.js?2.1.3"></script>
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.layout.js?2.1.3"></script>
<style type="text/css">
.slice text {
font-size: 16pt;
font-family: Arial;
}
</style>
</head>
<body>
<button id="button"> Test </button>
<br>
<form id="controls">
<div>
<h2>Y axis</h2>
<ul id="y-axis">
<li><label><input checked="checked" type="radio" name="y-axis" value="Component">Component</label></li>
<li><label><input type="radio" name="y-axis" value="Browser">Browser</label></li>
<li><label><input type="radio" name="y-axis" value="Version">Version</label></li>
</ul>
</div>
</form>
<script type="text/javascript">
// return a list of types which are currently selected
function plottableTypes () {
var types = [].map.call (document.querySelectorAll ("#coaster-types input:checked"), function (checkbox) { return checkbox.value;} );
return types;
}
var w = 600, //width
h = 600, //height
r = 100,
r2 = 200, //radius
axis = getAxis (), //axes
color = d3.scale.category20c(); //builtin range of colors
data = [
{"Browser":"Internet Explorer ","Version":"8.0","Toatl":2000,"Component":"6077447412293130422"},
{"Browser":"Internet Explorer ","Version":"9.0 ","Toatl":1852,"Component":"6077447412293130422"},
{"Browser":"Internet Explorer ","Version":"6.0 ","Toatl":1754,"Component":"6077447412293130422"},
{"Browser":"Firefox ","Version":"16.0 ","Toatl":1020,"Component":"6077447412293130422"},
{"Browser":"Chrome ","Version":"23.0 ","Toatl":972,"Component":"6077447412293130422"},
{"Browser":"Internet Explorer ","Version":"7.0 ","Toatl":700,"Component":"6077447412293130422"},
{"Browser":"Mobile Safari ","Version":"6.0 ","Toatl":632,"Component":"6077447412293130422"},
{"Browser":"BOT ","Version":"BOT ","Toatl":356,"Component":"6077447412293130422"},
{"Browser":"Firefox ","Version":"8.0 ","Toatl":196,"Component":"6077447412293130422"},
{"Browser":"Mobile Safari ","Version":"5.1 ","Toatl":184,"Component":"6077447412293130422"}
];
var vis = d3.select("body")
.append("svg:svg") //create the SVG element inside the <body>
.data([data]) //associate our data with the document
.attr("width", w) //set the width and height of our visualization (these will be attributes of the <svg> tag
.attr("height", h)
.append("svg:g") //make a group to hold our pie chart
.attr("transform", "translate(" + r2 + "," + r2 + ")") //move the center of the pie chart from 0, 0 to radius, radius
var arc = d3.svg.arc() //this will create <path> elements for us using arc data
.outerRadius(r);
var pie = d3.layout.pie() //this will create arc data for us given a list of values
.value(function(d) { return d.Toatl; }); //we must tell it out to access the value of each element in our data array
var arcs = vis.selectAll("g.slice") //this selects all <g> elements with class slice (there aren't any yet)
.data(pie) //associate the generated pie data (an array of arcs, each having startAngle, endAngle and value properties)
.enter() //this will create <g> elements for every "extra" data element that should be associated with a selection. The result is creating a <g> for every object in the data array
.append("svg:g") //create a group to hold each slice (we will have a <path> and a <text> element associated with each slice)
.attr("class", "slice"); //allow us to style things in the slices (like text)
arcs.append("svg:path")
.attr("fill", function(d, i) { return color(i); } ) //set the color for each slice to be chosen from the color function defined above
.attr("d", arc); //this creates the actual SVG path using the associated data (pie) with the arc drawing function
arcs.append("svg:text") //add a label to each slice
.attr("transform", function(d) { //set the label's origin to the center of the arc
//we have to make sure to set these before calling arc.centroid
d.innerRadius = r2;
d.outerRadius = r;
return "translate(" + arc.centroid(d) + ")"; //this gives us a pair of coordinates like [50, 50]
})
.attr("text-anchor", "middle") //center the text on it's origin
.text(function(d, i) {
if(axis.yAxis == "Component"){
return data[i].Component;
}
return data[i].Browser; //get the label from our original data array
});
d3.select('#button').on('click', reColor);
var arcOver = d3.svg.arc()
.outerRadius(r + 30)
.innerRadius(0);
var arc = d3.svg.arc()
.outerRadius(r)
.innerRadius(0);
var arcs = vis.selectAll("g.slice")
.attr("class", "slice")
.on("mouseover", function(d) {
getAxis();
d3.select(this)
.select("path")
.transition()
.duration(500)
.attr("d", arcOver);
d3.select(this).select("text")
.text(function(d, i) {
if(axis.yAxis == "Component"){
return data[i].Component;
}
return data[i].Browser; //get the label from our original data array
});
})
.on("mouseout", function(d) {
getAxis();
d3.select(this)
.select("path")
.transition()
.duration(500)
.attr("d", arc);
d3.select(this)
.select("text")
.text(function(d, i) {
if(axis.yAxis == "Component"){
return data[i].Component;
}
return data[i].Browser; //get the label from our original data array
});
});
function reColor(){
var slices = d3.select('body').selectAll('path');
slices.transition()
.duration(2000)
.attr("fill", function(d, i) { return color(i+2); } );
slices.transition()
.delay(2000)
.duration(2000)
.attr("fill", function(d, i) { return color(i+10); } )
}
function makeData(){
}
// return an object containing the currently selected axis choices
function getAxis () {
var y = document.querySelector("#y-axis input:checked").value;
return {
yAxis: y,
};
}
function update() {
axis = getAxis()
arcs.selectAll("text") //add a label to each slice
.text(function(d, i) {
if(axis.yAxis == "Component"){
return data[i].Component;
}
return data[i].Browser; //get the label from our original data array
});
}
document.getElementById("controls").addEventListener ("click", update, false);
document.getElementById("controls").addEventListener ("keyup", update, false);
</script>
</body>
</html>
