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<meta charset="utf-8">
<style>
.node {
stroke: #fff;
stroke-width: 1.5px;
}
.link {
stroke: #999;
}
body {font-family: graphik,Helvetica,Arial,sans-serif;}
</style>
<body>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var width = 1500,
height = 950;
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
d3.json("data_objects2.json", function(error, graph) {
if (error) throw error;
graph.links.forEach(function(d) {
d.source = graph.nodes[d.source];
d.target = graph.nodes[d.target];
});
var link = svg.append("g")
.attr("class", "link")
.selectAll("line")
.data(graph.links)
.enter().append("line")
.style("stroke", "#aaa")
.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; });
var node = svg.append("g")
.attr("class", "node")
.selectAll("circle")
.data(graph.nodes)
.enter().append("circle")
.attr("r", 20)
.style("fill", function(d) { return d.color; })
.style("stroke", "#969696")
.style("stroke-width", "1px")
.attr("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; })
.call(d3.drag().on("drag", dragged));
var label = svg.append("g")
.attr("class", "labels")
.selectAll("text")
.data(graph.nodes)
.enter().append("text")
.attr("class", "label")
.attr("x", function(d) { return d.x+15; })
.attr("y", function (d) { return d.y; })
.style("font-size", "20px").style("fill", "#000000")
.text(function(d) { return d.id; });
function dragged(d) {
d.x = d3.event.x, d.y = d3.event.y;
d3.select(this).attr("cx", d.x).attr("cy", d.y);
link.filter(function(l) { return l.source === d; }).attr("x1", d.x).attr("y1", d.y);
link.filter(function(l) { return l.target === d; }).attr("x2", d.x).attr("y2", d.y);
label.filter(function(l) { return l === d; }).attr("x", d.x+15).attr("y", d.y);
}
});
</script>
https://d3js.org/d3.v4.min.js