mobile-network-demo/sticky-force.html at master · WebDataScience/mobile-network-demo · GitHub

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<!DOCTYPE html>
<meta charset="utf-8">
<style>

.link {
  stroke: #000;
  stroke-width: 1.5px;
}

.node {
  cursor: move;
  fill: #ccc;
  stroke: #000;
  stroke-width: 1.5px;
}

.node.fixed {
  fill: #f00;
}

text {
  font: 12px sans-serif;
  pointer-events: none;
}

text.id {
  text-anchor: middle;
  font-weight: bold;
}

</style>
<body>
<script src="d3.v3.min.js"></script>
<script>

var width = 960,
    height = 500;

var force = d3.layout.force()
    .size([width, height])
    .charge(-400)
    .linkDistance(40)
    .on("tick", tick);

var drag = force.drag()
    .on("dragstart", dragstart);

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

var link = svg.selectAll(".link"),
    node = svg.selectAll(".node");

d3.json("startgraph.json", function(error, graph) {
  force
      .nodes(graph.nodes)
      .links(graph.links)
      .start();

  link = link.data(graph.links)
    .enter().append("line")
      .attr("class", "link");

  node = node.data(graph.nodes)
    .enter().append("circle")
      .attr("class", "node")
      .attr("r", 12)
      .on("dblclick", dblclick)
      .call(drag);

   // show node IDs
  node.append('svg:text')
      .attr('x', 0)
      .attr('y', 4)
      .attr('class', 'id')
      .text(function(d) {
        console.log(d.name);
        return d.name; });


});

function label() {
  node.attr("text-anchor", "middle")
      .text(function(d) {return d.name});
}
function tick() {
  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; });

  node.attr("cx", function(d) { return d.x; })
      .attr("cy", function(d) { return d.y; });
}

function dblclick(d) {
  d3.select(this).classed("fixed", d.fixed = false);
}

function dragstart(d) {
  d3.select(this).classed("fixed", d.fixed = true);
}

</script>