Develop Reference

d3 v4 donut chart has text and poylines that overlap with small values

I am trying to figure out how to arrange the labels so that they do not overlap. Here is a picture of the chart
As you can see, with really small values, the text labels overlap. I tried to iterate over each text element and modify it's position, but that doesn't seem to be working. You can see at the bottom of this function that I tried to get the position of each text element and then modify it. What am I doing wrong? I've been at it for hours.
_renderDonutChart() {
let self = this;
// console.log("Donut Chart is beginning render")
let textOffset = 14;
self.graph.data[0].forEach(function (d) {
d.value = +d.value;
})
console.log(self.graph.data[0])
let boxSize = (self.options.radius + self.options.padding) * 2;
let parent = d3.select(self.ui.parent);
//let color = d3.scaleOrdinal(['#dc8710', '#9e3400', '#f19b12']);
let color = d3.scaleOrdinal(d3.schemeCategory20c);
let svg = parent.append('svg')
.attr('width', boxSize * 2)
.attr('height', boxSize)
.attr('transform', 'translate(-111,0)')
.append('g')
.attr('transform', 'translate(' + boxSize + ',' + boxSize / 2 + ')');
svg.append('g')
.attr('class', 'slices')
svg.append("g")
.attr("class", "labelName")
svg.append("g")
.attr("class", "labelValue")
svg.append("g")
.attr("class", "lines")
svg.append("div")
.attr("class", "progress-circle__box progress-circle__box--victorytype")
let arc = d3.arc()
.innerRadius(self.options.radius - self.options.border)
.outerRadius(self.options.radius);
let outerArc = d3.arc()
.innerRadius((self.options.radius - self.options.border) * 1.2)
.outerRadius((self.options.radius) * 1.2);
let legendRectSize = self.options.radius * 0.05;
let legendSpacing = self.options.radius * 0.02;
let pie = d3.pie()
.value(function(d) { return d.value; })
.sort(null);
let slice = svg.select('.slices')
.selectAll('path.slice')
.data(pie(self.graph.data[0]))
.enter()
.append('path')
.attr("class", "slice")
.attr('d', arc)
.attr('fill', function(d, i) {
return color(d.data.label);
})
.transition().duration(1000)
.attrTween("d", function(d) {
this._current = this._current || 0;
var interpolate = d3.interpolate(this._current, d);
this._current = interpolate(0);
return function(t) {
return arc(interpolate(t));
};
})
function midAngle(d){
return d.startAngle + (d.endAngle - d.startAngle)/2;
}
let text = svg.select(".labelName").selectAll("text")
.data(pie(self.graph.data[0]))
.enter()
.append("text")
.attr('class', 'label')
.attr("dy", ".35em")
.attr('transform', function(d) {
// effectively computes the centre of the slice.
// see https://github.com/d3/d3-shape/blob/master/README.md#arc_centroid
var pos = outerArc.centroid(d);
// changes the point to be on left or right depending on where label is.
pos[0] = self.options.radius * 0.97 * (midAngle(d) < Math.PI ? 1 : -1);
return 'translate(' + pos + ')';
})
.style('text-anchor', function(d) {
// if slice centre is on the left, anchor text to start, otherwise anchor to end
return (midAngle(d)) < Math.PI ? 'start' : 'end';
})
.style("fill", "white")
.text(function(d) {
return (" " + d.data.label+": " +d.value+"");
})
.transition().duration(1000)
.attrTween("transform", function(d) {
this._current = this._current || d;
var interpolate = d3.interpolate(this._current, d);
this._current = interpolate(0);
return function(t) {
var d2 = interpolate(t);
var pos = outerArc.centroid(d2);
pos[0] = self.options.radius * (midAngle(d2) < Math.PI ? 1 : -1);
return "translate("+ pos +")";
};
})
.styleTween("text-anchor", function(d){
this._current = this._current || d;
var interpolate = d3.interpolate(this._current, d);
this._current = interpolate(0);
return function(t) {
var d2 = interpolate(t);
return midAngle(d2) < Math.PI ? "start":"end";
};
})
.text(function(d) {
return (d.data.label+": "+d.value+"%");
})
let polyline = svg.select(".lines").selectAll("polyline")
.data(pie(self.graph.data[0]))
.enter()
.append("polyline")
.attr('points', function(d) {
var pos = outerArc.centroid(d);
pos[0] = self.options.radius * 0.95 * (midAngle(d) < Math.PI ? 1 : -1);
return [arc.centroid(d), outerArc.centroid(d), pos]
})
.style("fill", "none")
.style("stroke", "white")
.style("stroke-width", "1px");
let prev;
text.each(function(d, i) {
if(i > 0) {
let thisbb = this.getBoundingClientRect(),
prevbb = prev.getBoundingClientRect();
// move if they overlap
console.log(thisbb.left);
console.log(prevbb.right);
if(!(thisbb.right < prevbb.left ||
thisbb.left > prevbb.right ||
thisbb.bottom < prevbb.top ||
thisbb.top > prevbb.bottom)) {
var ctx = thisbb.left + (thisbb.right - thisbb.left)/2,
cty = thisbb.top + (thisbb.bottom - thisbb.top)/2,
cpx = prevbb.left + (prevbb.right - prevbb.left)/2,
cpy = prevbb.top + (prevbb.bottom - prevbb.top)/2,
off = Math.sqrt(Math.pow(ctx - cpx, 2) + Math.pow(cty - cpy, 2))/2;
d3.select(this).attr("transform",
"translate(" + Math.cos(((d.startAngle + d.endAngle - Math.PI) / 2)) *
(self.options.radius + textOffset + off) + "," +
Math.sin((d.startAngle + d.endAngle - Math.PI) / 2) *
(self.options.radius + textOffset + off) + ")");
}
}
prev = this;
});
// console.log("Donut Chart is ending render")
}

I had the same issue. The best solution for me was to increase the size of the Svg area (based on current window) and add some padding to the legends based on the radius of the donut.
ie:
var margin = {top: 20, right: 100, bottom: 30, left: 40};
var svgWidth = window.innerWidth - (window.innerWidth/4);
var width = svgWidth,
height = (Math.min(width) / 2) + 100,
radius = Math.min(width, height) / 3;
var legendRectSize = (radius * 0.08);
var legendSpacing = (radius * 0.05);
This worked for me until the item count became too high. I amended from labels around the edge to display in the center, on slice/arc hover events. (There is an animation on the data value, which is why they are slanted in this snapshot)
I thought this made the unreadable data labels less confusing.

I thing you had same problem with this, you need to add more margin to your pie chart segment, assume your pie return 3% value, and you draw a text with line, it will stack on another, you need to devine margin if that value < 3 draw text with y+margin
if(percent<3){
o[1]
pos[1] += i*15
}
//return [label.centroid(d),[o[0],0[1]] , pos];
return [label.centroid(d),[o[0],pos[1]] , pos];
})
try to append this code structure to your chart

D3: Spiral plot

Can someone help me implementing a spiral chart similar to the one below using d3.js?
I've just got the basic spiral plot (a simple one) as of now but not been able to append bars to the plot based on the timeline as shown in the image. I'm trying out a few things (if you see the commented code).
Here's my fiddle, and my code:
var width = 400,
height = 430,
axes = 12,
tick_axis = 9,
start = 0,
end = 2.25;
var theta = function(r) {
return 2 * Math.PI * r;
};
var angle = d3.scale.linear()
.domain([0, axes]).range([0, 360])
var r = d3.min([width, height]) / 2 - 40;
var r2 = r;
var radius = d3.scale.linear()
.domain([start, end])
.range([0, r]);
var svg = d3.select("#chart").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + (height / 2 + 8) + ")");
var points = d3.range(start, end + 0.001, (end - start) / 1000);
var spiral = d3.svg.line.radial()
.interpolate("cardinal")
.angle(theta)
.radius(radius);
var path = svg.selectAll(".spiral")
.data([points])
.enter().append("path")
.attr("class", "spiral")
.attr("d", spiral)
var z = d3.scale.category20();
var circles = svg.selectAll('.circle')
.data(points);
/* circles.enter().append('circle')
.attr('r', 5)
.attr('transform', function(d) { return 'translate(' + d + ')'})
.style('fill', function(d) { return z(d); });
*/
var circle = svg.append("circle")
.attr("r", 13)
.attr("transform", "translate(" + points[0] + ")");
var movingCircle = circle.transition().duration(4000)
.attrTween('transform', translateAlongPath(path.node()))
// .attr('cx', function(d) { return radius(d) * Math.cos(theta(d))})
// .attr('cy', function(d) { return radius(d) * Math.sin(theta(d))})
function translateAlongPath(path) {
var l = path.getTotalLength();
return function(d, i, a) {
return function(t) {
var p = path.getPointAtLength(t * l);
//console.log(p)
return "translate(" + p.x + "," + p.y + ")";
};
};
}
function pathXY(path) {
var l = path.getTotalLength();
var start = 0;
/* for(i=start; i<l; i++) {
var point = path.getPointAtLength(i);
svg.append('rect').transition().duration(400).attr('transform', 'translate(' + point.x +','+point.y+')')
.attr('width', 10).attr('height', 30).style('fill', z);
}*/
}
pathXY(path.node());
/*var test = translateAlongPath(path.node())()();
//console.log(test)
var bars = svg.selectAll('.bar')
.data(points).enter().append('rect').transition().duration(2000)
// .attrTween('transform', translateAlongPath(path.node()))
.attr('class', 'bar')
.attr('width', 10)
.attr('height', 20)
.style('fill', function(d) { return z(d)});
*/
var rect = svg.append('rect').attr('width', 10).attr('height', 10);
rect.transition().duration(3400)
.attrTween('transform', translateAlongPath(path.node()));
It'd be great to have a few similar examples (i.e. spiral timeline plot).
Thanks.

Glad you came back and updated your question, because this is an interesting one. Here's a running minimal implementation. I've commented it ok, so let me know if you have any questions...
<!DOCTYPE html>
<html>
<head>
<script data-require="d3#4.0.0" data-semver="4.0.0" src="https://d3js.org/d3.v4.js"></script>
</head>
<body>
<div id="chart"></div>
<script>
var width = 500,
height = 500,
start = 0,
end = 2.25,
numSpirals = 4;
var theta = function(r) {
return numSpirals * Math.PI * r;
};
var r = d3.min([width, height]) / 2 - 40;
var radius = d3.scaleLinear()
.domain([start, end])
.range([40, r]);
var svg = d3.select("#chart").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
// create the spiral, borrowed from http://bl.ocks.org/syntagmatic/3543186
var points = d3.range(start, end + 0.001, (end - start) / 1000);
var spiral = d3.radialLine()
.curve(d3.curveCardinal)
.angle(theta)
.radius(radius);
var path = svg.append("path")
.datum(points)
.attr("id", "spiral")
.attr("d", spiral)
.style("fill", "none")
.style("stroke", "steelblue");
// fudge some data, 2 years of data starting today
var spiralLength = path.node().getTotalLength(),
N = 730,
barWidth = (spiralLength / N) - 1;
var someData = [];
for (var i = 0; i < N; i++) {
var currentDate = new Date();
currentDate.setDate(currentDate.getDate() + i);
someData.push({
date: currentDate,
value: Math.random()
});
}
// here's our time scale that'll run along the spiral
var timeScale = d3.scaleTime()
.domain(d3.extent(someData, function(d){
return d.date;
}))
.range([0, spiralLength]);
// yScale for the bar height
var yScale = d3.scaleLinear()
.domain([0, d3.max(someData, function(d){
return d.value;
})])
.range([0, (r / numSpirals) - 30]);
// append our rects
svg.selectAll("rect")
.data(someData)
.enter()
.append("rect")
.attr("x", function(d,i){
// placement calculations
var linePer = timeScale(d.date),
posOnLine = path.node().getPointAtLength(linePer),
angleOnLine = path.node().getPointAtLength(linePer - barWidth);
d.linePer = linePer; // % distance are on the spiral
d.x = posOnLine.x; // x postion on the spiral
d.y = posOnLine.y; // y position on the spiral
d.a = (Math.atan2(angleOnLine.y, angleOnLine.x) * 180 / Math.PI) - 90; //angle at the spiral position
return d.x;
})
.attr("y", function(d){
return d.y;
})
.attr("width", function(d){
return barWidth;
})
.attr("height", function(d){
return yScale(d.value);
})
.style("fill", "steelblue")
.style("stroke", "none")
.attr("transform", function(d){
return "rotate(" + d.a + "," + d.x + "," + d.y + ")"; // rotate the bar
});
// add date labels
var tF = d3.timeFormat("%b %Y"),
firstInMonth = {};
svg.selectAll("text")
.data(someData)
.enter()
.append("text")
.attr("dy", 10)
.style("text-anchor", "start")
.style("font", "10px arial")
.append("textPath")
// only add for the first of each month
.filter(function(d){
var sd = tF(d.date);
if (!firstInMonth[sd]){
firstInMonth[sd] = 1;
return true;
}
return false;
})
.text(function(d){
return tF(d.date);
})
// place text along spiral
.attr("xlink:href", "#spiral")
.style("fill", "grey")
.attr("startOffset", function(d){
return ((d.linePer / spiralLength) * 100) + "%";
})
</script>
</body>
</html>

Trying to update d3.js circles with new data

I've recently began trying to teach myself D3, and I'm to get my head round the enter, update, exit paradigm.
Below I have an example of some progress circles I'm trying to work with;
http://plnkr.co/edit/OoIL8v6FemzjzoloJxtQ?p=preview
Now, as the aim here is to update the circle path without deleting them, I believe I shouldn't be using the exit function? In which case, I was under the impression that I could update my data source inside a new function and then call for the path transition, and I would get my updated value. However, this is not the case.
I was wondering if someone could help me out and show me where I'm going wrong?
var dataset = [{
"vendor-name": "HP",
"overall-score": 45
}, {
"vendor-name": "CQ",
"overall-score": 86
}];
var dataset2 = [{
"vendor-name": "HP",
"overall-score": 22
}, {
"vendor-name": "CQ",
"overall-score": 46
}];
var width = 105,
height = 105,
innerRadius = 85;
var drawArc = d3.svg.arc()
.innerRadius(innerRadius / 2)
.outerRadius(width / 2)
.startAngle(0);
var vis = d3.select("#chart").selectAll("svg")
.data(dataset)
.enter()
.append('svg')
.attr('width', width)
.attr('height', height)
.append('g')
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
vis.append("circle")
.attr("fill", "#ffffff")
.attr("stroke", "#dfe5e6")
.attr("stroke-width", 1)
.attr('r', width / 2);
vis.append("path")
.attr("fill", "#21addd")
.attr('class', 'arc')
.each(function(d) {
d.endAngle = 0;
})
.attr('d', drawArc)
.transition()
.duration(1200)
.ease('linear')
.call(arcTween);
vis.append('text')
.text(0)
.attr("class", "perc")
.attr("text-anchor", "middle")
.attr('font-size', '36px')
.attr("y", +10)
.transition()
.duration(1200)
.tween(".percentage", function(d) {
var i = d3.interpolate(this.textContent, d['overall-score']),
prec = (d.value + "").split("."),
round = (prec.length > 1) ? Math.pow(10, prec[1].length) : 1;
return function(t) {
this.textContent = Math.round(i(t) * round) / round + "%";
};
});
function updateChart() {
vis = vis.data(dataset2)
vis.selectAll("path")
.transition()
.duration(1200)
.ease('linear')
.call(arcTween);
vis.selectAll('text')
.transition()
.duration(1200)
.tween(".percentage", function(d) {
var i = d3.interpolate(this.textContent, d['overall-score']),
prec = (d.value + "").split("."),
round = (prec.length > 1) ? Math.pow(10, prec[1].length) : 1;
return function(t) {
this.textContent = Math.round(i(t) * round) / round + "%";
};
});
}
function arcTween(transition, newAngle) {
transition.attrTween("d", function(d) {
var interpolate = d3.interpolate(0, 360 * (d['overall-score'] / 100) * Math.PI / 180);
return function(t) {
d.endAngle = interpolate(t)
return drawArc(d);
};
});
}
Any help/advice is much appreciated!
Thanks all

You need to refresh your data through the DOM - svg > g > path :
// SET DATA TO SVG
var svg = d3.selectAll("svg")
.data(selectedDataset)
// SET DATA TO G
var g = svg.selectAll('g')
.data(function(d){return [d];})
// SET DATA TO PATH
var path = g.selectAll('path')
.data(function(d){ return [d]; });
Storing the d3 DOM data bind object for each step you can have control of the enter(), extit(), and transition() elements. Put changing attributes of elements in the transition() function:
// PATH ENTER
path.enter()
.append("path")
.attr("fill", "#21addd")
.attr('class', 'arc')
// PATH TRANSITION
path.transition()
.duration(1200)
.ease('linear')
.attr('d', function(d){ console.log(d);drawArc(d)})
.call(arcTween);
http://plnkr.co/edit/gm2zpDdBdQZ62YHhDbLb?p=preview

Alternating or preventing overlapping paths in D3

I am creating an arc diagram where I'd like to, hopefully, find a way to prevent the overlap of arcs. There's an example of the working bl.ock here.
The darker lines in this case are overlapping lines where multiple nodes share the same edge. I'd like to prevent that, perhaps by doing two passes: the first would alternate the arc to go above the nodes rather than below, giving a sort of helix appearance; the second would draw a slightly larger arc if an arc already exists above/below to help differentiate the links.
var width = 1000,
height = 500,
margin = 20,
pad = margin / 2,
radius = 6,
yfixed = pad + radius;
var color = d3.scale.category10();
// Main
//-----------------------------------------------------
function arcDiagram(graph) {
var radius = d3.scale.sqrt()
.domain([0, 20])
.range([0, 15]);
var svg = d3.select("#chart").append("svg")
.attr("id", "arc")
.attr("width", width)
.attr("height", height);
// create plot within svg
var plot = svg.append("g")
.attr("id", "plot")
.attr("transform", "translate(" + pad + ", " + pad + ")");
// fix graph links to map to objects
graph.links.forEach(function(d,i) {
d.source = isNaN(d.source) ? d.source : graph.nodes[d.source];
d.target = isNaN(d.target) ? d.target : graph.nodes[d.target];
});
linearLayout(graph.nodes);
drawLinks(graph.links);
drawNodes(graph.nodes);
}
// layout nodes linearly
function linearLayout(nodes) {
nodes.sort(function(a,b) {
return a.uniq - b.uniq;
})
var xscale = d3.scale.linear()
.domain([0, nodes.length - 1])
.range([radius, width - margin - radius]);
nodes.forEach(function(d, i) {
d.x = xscale(i);
d.y = yfixed;
});
}
function drawNodes(nodes) {
var gnodes = d3.select("#plot").selectAll("g.node")
.data(nodes)
.enter().append('g');
var nodes = gnodes.append("circle")
.attr("class", "node")
.attr("id", function(d, i) { return d.name; })
.attr("cx", function(d, i) { return d.x; })
.attr("cy", function(d, i) { return d.y; })
.attr("r", 5)
.style("stroke", function(d, i) { return color(d.gender); });
nodes.append("text")
.attr("dx", function(d) { return 20; })
.attr("cy", ".35em")
.text(function(d) { return d.name; })
}
function drawLinks(links) {
var radians = d3.scale.linear()
.range([Math.PI / 2, 3 * Math.PI / 2]);
var arc = d3.svg.line.radial()
.interpolate("basis")
.tension(0)
.angle(function(d) { return radians(d); });
d3.select("#plot").selectAll(".link")
.data(links)
.enter().append("path")
.attr("class", "link")
.attr("transform", function(d,i) {
var xshift = d.source.x + (d.target.x - d.source.x) / 2;
var yshift = yfixed;
return "translate(" + xshift + ", " + yshift + ")";
})
.attr("d", function(d,i) {
var xdist = Math.abs(d.source.x - d.target.x);
arc.radius(xdist / 2);
var points = d3.range(0, Math.ceil(xdist / 3));
radians.domain([0, points.length - 1]);
return arc(points);
});
}
Any pointers on how I might start approaching the problem?

Here is a bl.ock for reference. It shows your original paths in gray, and the proposed paths in red.
First store the counts for how many times a given path occurs:
graph.links.forEach(function(d,i) {
var pathCount = 0;
for (var j = 0; j < i; j++) {
var otherPath = graph.links[j];
if (otherPath.source === d.source && otherPath.target === d.target) {
pathCount++;
}
}
d.pathCount = pathCount;
});
Then once you have that data, I would use an ellipse instead of a radial line since it appears the radial line can only draw a curve for a circle:
d3.select("#plot").selectAll(".ellipse-link")
.data(links)
.enter().append("ellipse")
.attr("fill", "transparent")
.attr("stroke", "gray")
.attr("stroke-width", 1)
.attr("cx", function(d) {
return (d.target.x - d.source.x) / 2 + radius;
})
.attr("cy", pad)
.attr("rx", function(d) {
return Math.abs(d.target.x - d.source.x) / 2;
})
.attr("ry", function(d) {
return 150 + d.pathCount * 20;
})
.attr("transform", function(d,i) {
var xshift = d.source.x - radius;
var yshift = yfixed;
return "translate(" + xshift + ", " + yshift + ")";
});
Note that changing the value for ry above will change the heights of different curves.
Finally you'll have to use a clippath to restrict the area of each ellipse that's actually shown, so that they only display below the nodes. (This is not done in the bl.ock)

D3pie.js labels.inner distance from the center

I use http://d3pie.org/#docs-settings
But there is no such parameter as the distance from the center to the internal labels.
Can someone tried to do it?
I want to move the internal labels closer to the outer edge of the circle.
Thank you so much.
now so:
need:

You can position the labels by defining a new arc as suggested in https://stackoverflow.com/a/8270668/2314737 and then applying the centroid function.
I defined a new arc newarc with an inner radius equal to 2/3 of the outer radius.
var newarc = d3.svg.arc()
.innerRadius(2 * radius / 3)
.outerRadius(radius);
Here's the JS code:
var width = 300;
var height = 300;
var svg = d3.select("body").append("svg");
svg.attr("width", width)
.attr("height", height);
var dataset = [11, 13, 18, 25, 31];
var radius = width / 2;
var innerRadius = 0;
var arc = d3.svg.arc()
.innerRadius(0)
.outerRadius(radius);
var pie = d3.layout.pie();
var arcs = svg.selectAll("g.arc")
.data(pie(dataset))
.enter()
.append("g")
.attr("class", "arc")
.attr("transform", "translate(" + radius + ", " + radius + ")");
//Draw arc paths
var color = d3.scale.category10();
arcs.append("path")
.attr("fill", function (d, i) {
console.log(d);
return color(i);
})
.attr("stroke", "white")
.attr("d", arc);
var newarc = d3.svg.arc()
.innerRadius(2 * radius / 3)
.outerRadius(radius);
// Place labels
arcs.append("text")
.attr("transform", function (d) {
return "translate(" + newarc.centroid(d) + ")";
})
.attr("text-anchor", "middle")
.attr("fill", "white")
.text(function (d) {
return d.value + "%";
});
Here is a working demo: http://jsfiddle.net/user2314737/kvz8uev8/2/

I decided to enroll in another way.
I added my property in the object and function of positioning inner labels in D3pie file d3pie.js
This function is located on the line - 996 d3pie.js
positionLabelGroups: function(pie, section) {
d3.selectAll("." + pie.cssPrefix + "labelGroup-" + section)
.style("opacity", 0)
.attr("transform", function(d, i) {
var x, y;
if (section === "outer") {
x = pie.outerLabelGroupData[i].x;
y = pie.outerLabelGroupData[i].y;
} else {
var pieCenterCopy = extend(true, {}, pie.pieCenter);
// now recompute the "center" based on the current _innerRadius
if (pie.innerRadius > 0) {
var angle = segments.getSegmentAngle(i, pie.options.data.content, pie.totalSize, { midpoint: true });
var newCoords = math.translate(pie.pieCenter.x, pie.pieCenter.y, pie.innerRadius, angle);
pieCenterCopy.x = newCoords.x;
pieCenterCopy.y = newCoords.y;
//console.log('i ='+i , 'angle='+angle, 'pieCenterCopy.x='+pieCenterCopy.x, 'pieCenterCopy.y='+pieCenterCopy.y);
}
var dims = helpers.getDimensions(pie.cssPrefix + "labelGroup" + i + "-inner");
var xOffset = dims.w / 2;
var yOffset = dims.h / 4; // confusing! Why 4? should be 2, but it doesn't look right
// ADD VARAIBLE HERE !!! =)
var divisor = pie.options.labels.inner.pieDistanceOfEnd;
x = pieCenterCopy.x + (pie.lineCoordGroups[i][0].x - pieCenterCopy.x) / divisor;
y = pieCenterCopy.y + (pie.lineCoordGroups[i][0].y - pieCenterCopy.y) / divisor;
x = x - xOffset;
y = y + yOffset;
}
return "translate(" + x + "," + y + ")";
});
},
I add var divisor = pie.options.labels.inner.pieDistanceOfEnd;
Then I spotted this property devoltnyh the configuration file bhp and passed for plotting parameters.
inner: {
format: "percentage",
hideWhenLessThanPercentage: null,
pieDistanceOfEnd : 1.8
},
Meaning pieDistanceOfEnd: 1 hang tag on the outer radius of the chart
value pieDistanceOfEnd: 1.25 turn them slightly inward ....
You can play these parameters and to achieve the desired option.

In d3pie.js look for the function positionLabelGroups. In this function both labels (outer and inner) are positioned.
To modify the distance from the center you can play with the x,y here:
x = pieCenterCopy.x + (pie.lineCoordGroups[i][0].x - pieCenterCopy.x) / 1.8;
y = pieCenterCopy.y + (pie.lineCoordGroups[i][0].y - pieCenterCopy.y) / 1.8;
What I did was decreasing the 1.8 to 1.2 and obtained what youre looking for. Dont know what the other vars do, but you can study the code to figure it out