Responsive line label for d3js piechart

Question

Currently I am working on d3js pie chart.

I wanted my pie chart to have responsive line label. Can any one guide me how can I achive it.

This is what i have tried. but when the values are less the label overlaps as you can see in the below link.

 var dataset = {
  apples: [53245, 28479, 19697, 537, 245],
};

var width = 300,
    height = 300,
    radius = Math.min(width, height) / 2;

var color = d3.scale.category20();

var pie = d3.layout.pie()
    .sort(null);

var piedata = pie(dataset.apples);

var arc = d3.svg.arc()
    .innerRadius(radius - 100)
    .outerRadius(radius - 50);

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height)
    .append("g")
    .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");

var path = svg.selectAll("path")
    .data(piedata)
  .enter().append("path")
    .attr("fill", function(d, i) { return color(i); })
    .attr("d", arc);

svg.selectAll("text").data(piedata)
    .enter()
    .append("text")
    .attr("text-anchor", "middle")
    .attr("x", function(d) {
        var a = d.startAngle + (d.endAngle - d.startAngle)/2 - Math.PI/2;
        d.cx = Math.cos(a) * (radius - 75);
        return d.x = Math.cos(a) * (radius - 20);
    })
    .attr("y", function(d) {
        var a = d.startAngle + (d.endAngle - d.startAngle)/2 - Math.PI/2;
        d.cy = Math.sin(a) * (radius - 75);
        return d.y = Math.sin(a) * (radius - 20);
    })
    .text(function(d) { return d.value; })
    .each(function(d) {
        var bbox = this.getBBox();
        d.sx = d.x - bbox.width/2 - 2;
        d.ox = d.x + bbox.width/2 + 2;
        d.sy = d.oy = d.y + 5;
    });

svg.append("defs").append("marker")
    .attr("id", "circ")
    .attr("markerWidth", 6)
    .attr("markerHeight", 6)
    .attr("refX", 3)
    .attr("refY", 3)
    .append("circle")
    .attr("cx", 3)
    .attr("cy", 3)
    .attr("r", 3);

svg.selectAll("path.pointer").data(piedata).enter()
    .append("path")
    .attr("class", "pointer")
    .style("fill", "none")
    .style("stroke", "black")
    .attr("marker-end", "url(#circ)")
    .attr("d", function(d) {
        if(d.cx > d.ox) {
            return "M" + d.sx + "," + d.sy + "L" + d.ox + "," + d.oy + " " + d.cx + "," + d.cy;
        } else {
            return "M" + d.ox + "," + d.oy + "L" + d.sx + "," + d.sy + " " + d.cx + "," + d.cy;
        }
    });

This is not a very easy problem in general. Have you looked at the alternatives: http://stackoverflow.com/questions/14534024/preventing-overlap-of-text-in-d3-pie-chart or http://stackoverflow.com/questions/19792552/d3-put-arc-labels-in-a-pie-chart-if-there-is-enough-space ? — musically_ut, Aug 25 '15 at 08:47

score 0 · Answer 1 · answered Nov 19 '15 at 15:12

0

You can rotate the labels using CSS3.

transform: rotate(90deg);

Or just use this library: http://d3pie.org/

answered Nov 19 '15 at 15:12

faressoft

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Responsive line label for d3js piechart

1 Answers1