Label of donut chart is too long - d3.js

Question

My problem is labels of donut chart too long. It'll be cut lost when it get over width or height of svg.
i don't know how i must cut it to 2 or more line. I try to add tag div outside tag text but it's wrong. Who can give me a solution. This is my code:
var tooltip = d3.select('#chart')
.append('div')
.attr('class', 'tooltips');
tooltip.append('div')
.attr('class', 'label');
var data = [
{country: "UNITED KINGDOMhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhh", val: 86.68},
{country: "HONG KONGggggggggggggggggggggg g g g gg g g g g gg gg g g ", val: 9.23},
{country: "OTHERS", val: 4.09}
];
var w = 600,
h = 600,
r = Math.min(w, h) / 2 - 100,
labelr = r + 30, // radius for label anchor
color = d3.scale.category20(),
donut = d3.layout.pie(),
arc = d3.svg.arc().innerRadius(r * .6).outerRadius(r);
var vis = d3.select("#chart")
.append("svg:svg")
.data([data])
.attr("width", w + 150)
.attr("height", h);
var arcs = vis.selectAll("g.arc")
.data(donut.value(function(d) { return d.val }))
.enter().append("svg:g")
.attr("class", "arc")
.attr("transform", "translate(" + (r + 200) + "," + (r+100) + ")");
var arcOver = d3.svg.arc()
.innerRadius(r * .57)
.outerRadius(r + 5);
arcs.append("path")
.attr("fill", function(d, i) { return color(i); })
.attr("d", arc)
.on("mouseover",function(d){
d3.select(this).transition()
.duration(50)
.attr("d", arcOver);
tooltip.select('.label').html(d.value + "%");
tooltip.style('display', 'block');
})
.on('mouseout', function() {
d3.select(this).transition()
.duration(50)
.attr("d", arc);
tooltip.style('display', 'none');
})
.on('mousemove', function(d) {
tooltip.style('top', (d3.event.pageY - 80) + 'px')
.style('left', (d3.event.pageX + 10) + 'px');
});
arcs.append("text")
.attr("transform", function(d) {
var c = arc.centroid(d),
x = c[0],
y = c[1],
// pythagorean theorem for hypotenuse
h = Math.sqrt(x*x + y*y);
return "translate(" + (x/h * labelr) + ',' +
(y/h * labelr) + ")";
})
.attr("dy", ".35em")
.attr("text-anchor", function(d) {
// are we past the center?
return (d.endAngle + d.startAngle)/2 > Math.PI ?
"end" : "start";
})
.text(function(d) { return d.data.country; });
Thanks!!!

Answer 1

var tooltip = d3.select('#chart')
.append('div')
.attr('class', 'tooltips');
tooltip.append('div')
.attr('class', 'label');
var data = [
{country: "UNITED KINGDOMhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhh", val: 86.68},
{country: "HONG KONGggggggggggggggggggggg g g g gg g g g g gg gg g g ", val: 9.23},
{country: "OTHERS", val: 4.09}
];
var w = 600,
h = 600,
r = Math.min(w, h) / 2 - 100,
labelr = r + 30, // radius for label anchor
color = d3.scale.category20(),
donut = d3.layout.pie(),
arc = d3.svg.arc().innerRadius(r * .6).outerRadius(r);
var vis = d3.select("#chart")
.append("svg:svg")
.data([data])
.attr("width", w + 150)
.attr("height", h);
var arcs = vis.selectAll("g.arc")
.data(donut.value(function(d) { return d.val }))
.enter().append("svg:g")
.attr("class", "arc")
.attr("transform", "translate(" + (r + 200) + "," + (r+100) + ")");
var arcOver = d3.svg.arc()
.innerRadius(r * .57)
.outerRadius(r + 5);
arcs.append("path")
.attr("fill", function(d, i) { return color(i); })
.attr("d", arc)
.on("mouseover",function(d){
d3.select(this).transition()
.duration(50)
.attr("d", arcOver);
tooltip.select('.label').html(d.value + "%");
tooltip.style('display', 'block');
})
.on('mouseout', function() {
d3.select(this).transition()
.duration(50)
.attr("d", arc);
tooltip.style('display', 'none');
})
.on('mousemove', function(d) {
tooltip.style('top', (d3.event.pageY - 80) + 'px')
.style('left', (d3.event.pageX + 10) + 'px');
});
var text = arcs.append("text")
.attr("transform", function(d) {
var c = arc.centroid(d),
x = c[0],
y = c[1],
// pythagorean theorem for hypotenuse
h = Math.sqrt(x*x + y*y);
return "translate(" + (x/h * labelr) + ',' +
(y/h * labelr) + ")";
})
.attr("dy", ".35em")
.attr("text-anchor", function(d) {
// are we past the center?
return (d.endAngle + d.startAngle)/2 > Math.PI ?
"end" : "start";
});/*
.text(function(d) {
return d.data.country;
});*/
text.each(function(d){
var text = d3.select(this),
words = d.data.country.split(/\s+/).reverse(),
word,
line = [],
lineNumber = 0,
lineHeight = 0.22, // ems
y = text.attr("y"),
dy = parseFloat(text.attr("dy")),
tspan = text.text(null)
.append("tspan")
.attr("x", 0)
.attr("y", y)
.attr("dy", dy + "em");
while (word = words.pop()) {
line.push(word);
tspan.text(line.join(" "));
if (tspan.node().getComputedTextLength() > 10) {
line.pop();
tspan.text(line.join(" "));
line = [word];
tspan = text.append("tspan")
.attr("x", 0)
.attr("y", y)
.attr("dy", ++lineNumber * lineHeight + dy + "em")
.text(word);
}
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<div id='chart'></div>
After doing a great lot of work out. I got this.
Hope this will fulfill your need/requirement.
All I did is,
Adding tspan elements to text element.Observe below code. text is a var see above code. which holds all text elements which we want to add to the every g
text.each(function(d){
var text = d3.select(this),//selecting current text element
words = d.data.country.split(/\s+/).reverse(),//splitting the country name by using space, if you want you can change.
word,//to store one one word
line = [],
lineNumber = 0,
lineHeight = 0.22, // ems, you can increase for more gaps vise versa
y = text.attr("y"),
dy = parseFloat(text.attr("dy")),
tspan = text.text(null)
.append("tspan")
.attr("x", 0)
.attr("y", y)
.attr("dy", dy + "em");
while (word = words.pop()) {
line.push(word);
tspan.text(line.join(" "));
if (tspan.node().getComputedTextLength() > 10) {//here I'm checking the length of the text
line.pop();
tspan.text(line.join(" "));
line = [word];
tspan = text.append("tspan")
.attr("x", 0)
.attr("y", y)
.attr("dy", ++lineNumber * lineHeight + dy + "em")//setting the gap between the label line gaps.
.text(word);
}
}
})