force directed graph d3

with no pointer events for the text

by Shankar

HTML

<!DOCTYPE html>
<body>
<script src="http://d3js.org/d3.v2.min.js?2.9.6"></script>
</body>

CSS

.node {
  stroke: #fff;
  stroke-width: 1.5px;
}

.link {
  stroke: #999;
  stroke-opacity: .6;
}

text {
    pointer-events: none;
}

JavaScript

var graph = {
  "nodes":[
    {"name":"a","group":1},
      {"name":"a","group":1},
      {"name":"a","group":1},
      {"name":"a","group":1},
    {"name":"b","group":8}
  ],
  "links":[
    {"source":1,"target":0,"value":1},
      {"source":2,"target":0,"value":1},
      {"source":3,"target":0,"value":1},
      {"source":4,"target":0,"value":1}
  ]
};
var width = 900,
    height = 900;

var color = d3.scale.category20();

var force = d3.layout.force()
    .charge(-120)
    .linkDistance(10)
    .size([width, height]);

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

var drawGraph = function(graph) {
  force
      .nodes(graph.nodes)
      .links(graph.links)
      .start();

  var link = svg.selectAll(".link")
      .data(graph.links)
    .enter().append("line")
      .attr("class", "link")
      .style("stroke-width", function(d) { return Math.sqrt(d.value); });

  var gnodes = svg.selectAll('g.gnode')
  .data(graph.nodes)
  .enter()
  .append('g')
  .classed('gnode', true)
  .call(force.drag);
  
  var node = gnodes.append("circle")
      .attr("class", "node")
      .attr("r", 5)
      .style("fill", function(d) { return color(d.group); });

  node.append("title")
      .text(function(d) { return d.name; });

   var labels = gnodes.append("text")
              .text(function(d) { return d.name; })
              .attr('text-anchor', 'middle')
              .attr('font-size', 8.0)
              .attr('font-weight', 'bold')
              .attr('y', 2.5)
              .attr('fill', d3.rgb(50,50,50))
              .attr('class', 'node-label')
              .append("svg:title")
              .text(function(d) { return d.name; });
    
  force.on("tick", function() {
    link.attr("x1", function(d) { return d.source.x; })
        .attr("y1", function(d) { return d.source.y; })
        .attr("x2", function(d) { return d.target.x; })
        .attr("y2", function(d) { return d.target.y; })
    .each(function(d) {...