D3NodeExamplesMunge

A mixture of the best parts of the following D3 examples http://bl.ocks.org/mbostock/4062045 http://bl.ocks.org/mbostock/929623 http://bl.ocks.org/Caged/6476579

by Simon Raper

HTML

<script src="http://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js"></script>
<script type="application/json" id="mis">
    {
        "nodes": [{
            "name": "Myriel",
            "group": 1
        }, {
            "name": "Napoleon",
            "group": 1
        }, {
            "name": "Mlle.Baptistine",
            "group": 1
        }, {
            "name": "Mme.Magloire",
            "group": 1
        }, {
            "name": "CountessdeLo",
            "group": 1
        }, {
            "name": "Geborand",
            "group": 1
        }, {
            "name": "Champtercier",
            "group": 1
        }, {
            "name": "Cravatte",
            "group": 1
        }, {
            "name": "Count",
            "group": 1
        }, {
            "name": "OldMan",
            "group": 1
        }, {
            "name": "Labarre",
            "group": 2
        }, {
            "name": "Valjean",
            "group": 2
        }, {
            "name": "Marguerite",
            "group": 3
        }, {
            "name": "Mme.deR",
            "group": 2
        }, {
            "name": "Isabeau",
            "group": 2
        }, {
            "name": "Gervais",
            "group": 2
        }, {
            "name": "Tholomyes",
            "group": 3
        }, {
            "name": "Listolier",
            "group": 3
        }, {
            "name": "Fameuil",
            "group": 3
        }, {
            "name": "Blacheville",
            "group": 3
        }, {
            "name": "Favourite",
            "group": 3
        }, {
            "name": "Dahlia",
            "group": 3
        }, {
            "name": "Zephine",
            "group": 3
        }, {
            "name": "Fantine",
            "group": 3
        }, {
            "name": "Mme.Thenardier",
            "group": 4
        }, {
            "name": "Thenardier",
            "group": 4
        }, {
            "name": "Cosette",
            "group": 5
    ...

CSS

.node {
    stroke: #fff;
    stroke-width: 1.5px;
}
.link {
    stroke: #999;
    stroke-opacity: .6;
}
.d3-tip {
    line-height: 1;
    color: #999;
}

.cursor {
  fill: none;
  stroke: brown;
  pointer-events: none;
}

JavaScript

var width = 960,
    height = 500;

var color = d3.scale.category20();

var force = d3.layout.force()
    .charge(-120)
    .linkDistance(30)
    .size([width, height]);

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

var tip = d3.tip()
    .attr('class', 'd3-tip')
    .offset([-10, 0])
    .html(function (d) {
    return "<strong>Name:</strong> <span style='color:red'>" + d.name + "</span>";
})

var cursor = svg.append("circle")
    .attr("r", 30)
    .attr("transform", "translate(-100,-100)")
    .attr("class", "cursor");

var stuff = document.getElementById('mis').innerHTML;
graph = JSON.parse(stuff);

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('click', click)
    .on('mouseover', tip.show)
    .on('mouseout', tip.hide);


svg.call(tip);

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;
    });
});

function mousemove() {
  cursor.attr("transform", "translate(" + d3.mouse(this) + ")");
}

function mousedown() {
  var point = d3.mouse(this),
      node = {x: point[0], y: point[1]},
      n = graph.nodes.push(node);

  // add links to any nearby...