networkGraph/dblclick.html at master · CharlesMcquade/networkGraph · GitHub

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

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

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

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

var width = 1800,
    height = 1000;

var color = d3.scale.category20();

var force = d3.layout.force()
    .charge(-600)
    .linkDistance(60)
    .size([width, height]);


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

d3.json("miserables.json", function(error, graph) {
  if (error) throw error;

  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 node = svg.selectAll(".node")
      .data(graph.nodes)
    .enter().append("circle")
      .attr("class", "node")
      .attr("r", 5)
      .style("fill", function(d) { return color(d.group); })
      .call(force.drag)
      .on('dblclick', connectedNodes); //ADDED FOR DOUBLE CLICK
      //.append("text")
      //.attr("dy", ".35em")
      //.text(function(d) {return d.name;});

  node.append("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; });

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


//#########################BEGIN DOUBLE CLICK CODE##############################//
//Toggle stores whether the highlighting is on
var toggle = 0;
//Create an array logging what is connected to what
var linkedByIndex = {};

for (i = 0; i < graph.nodes.length; i++) {
        linkedByIndex[i + "," + i] = 1;
};

graph.links.forEach(function (d) {
    linkedByIndex[d.source.index + "," + d.target.index] = 1;
});
//This function looks up whether a pair are neighbours
function neighboring(a, b) {
        return linkedByIndex[a.index + "," + b.index];
}
function connectedNodes() {
    if (toggle == 0) {
        //Reduce the opacity of all but the neighbouring nodes
         d = d3.select(this).node().__data__;
        node.style("opacity", function (o) {
            return neighboring(d, o) | neighboring(o, d) ? 1 : 0.1;
        });
        link.style("opacity", function (o) {
        return d.index==o.source.index | d.index==o.target.index ? 1 : 0.1;
    });
    //Reduce the op
        toggle = 1;
    } else {
    //Put them back to opacity=1
        node.style("opacity", 1);
        link.style("opacity", 1);
        toggle = 0;
    }
}
//#########################END DOUBLE CLICK CODE##############################//
});

</script>