I have a D3 (v3.4) edge bundling chart and I want to update the chart with a new dataset by clicking an ‘update’ button. I’d like to see the chart update displaying data from the data2.json (and not data1.json). I currently have an update button and the start of an updateData() function that simply reads in the new dataset, though I’m not sure what parts of my code I need to include in this function to update via transition. I’m aware that certain parts of the chart need to be re-rendered and it isn’t a case of simply loading in a new dataset. I was using this Update d3.js data with button press example as a basis though because it’s a line chart the transition updates are a lot simpler and so less helpful to my edge bundle chart. My code below represents a minimally reproducible example..
HTML/JS
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<script type='text/javascript' src='https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js'></script>
<script src="https://d3js.org/d3.v4.js"></script>
<style>
.node {
font: 300 11px "Helvetica Neue", Helvetica, Arial, sans-serif;
fill: rgb(0, 0, 0, .6);
}
.link {
stroke: steelblue;
fill: none;
pointer-events: none;
}
</style>
</head>
<body>
<div class="grid-container"></div>
<div class="grid-item" id="chart">
<div id="my_dataviz"></div>
<script>
var diameter = 760,
radius = diameter / 2;
innerRadius = radius - 160;
var cluster = d3.cluster()
.size([360, innerRadius]);
var line = d3.radialLine()
.curve(d3.curveBundle.beta(0.85))
.radius(function(d) { return d.y; })
.angle(function(d) { return d.x / 180 * Math.PI; });
var svg = d3.select("body").append("svg")
.attr("width", diameter)
.attr("height", diameter)
.append("g")
.attr("transform", "translate(" + radius + "," + radius + ")");
var link = svg.append("g").selectAll(".link"),
node = svg.append("g").selectAll(".node");
d3.json("data1.json", function(error, classes) {
if (error) throw error;
var root = packageHierarchy(classes)
.sum(function(d) { return d.size; });
cluster(root);
link = link
.data(packageImports(root.leaves()))
.enter().append("path")
.each(function(d) { d.source = d[0], d.target = d[d.length - 1]; })
.attr("class", "link")
.attr("d", line);
node = node
.data(root.leaves())
.enter().append("text")
.attr("class", "node")
.attr("dy", "0.31em")
.attr("transform", function(d) { return "rotate(" + (d.x - 90) + ")translate(" + (d.y + 8) + ",0)" + (d.x < 180 ? "" : "rotate(180)"); })
.attr("text-anchor", function(d) { return d.x < 180 ? "start" : "end"; })
.text(function(d) { return d.data.key; })
.on("mouseover", mouseovered)
.on("mouseout", mouseouted);
});
function mouseovered(d) {
node
.each(function(n) { n.target = n.source = false; });
link
.classed("link--target", function(l) { if (l.target === d) return l.source.source = true; })
.classed("link--source", function(l) { if (l.source === d) return l.target.target = true; })
.filter(function(l) { return l.target === d || l.source === d; })
.raise();
node
.classed("node--target", function(n) { return n.target; })
.classed("node--source", function(n) { return n.source; });
}
function mouseouted(d) {
link
.classed("link--target", false)
.classed("link--source", false);
node
.classed("node--target", false)
.classed("node--source", false);
}
// Lazily construct the package hierarchy from class names.
function packageHierarchy(classes) {
var map = {};
function find(name, data) {
var node = map[name], i;
if (!node) {
node = map[name] = data || {name: name, children: []};
if (name.length) {
node.parent = find(name.substring(0, i = name.lastIndexOf(".")));
node.parent.children.push(node);
node.key = name.substring(i + 1);
}
}
return node;
}
classes.forEach(function(d) {
find(d.name, d);
});
return d3.hierarchy(map[""]);
}
// Return a list of imports for the given array of nodes.
function packageImports(nodes) {
var map = {},
imports = [];
// Compute a map from name to node.
nodes.forEach(function(d) {
map[d.data.name] = d;
});
// For each import, construct a link from the source to target node.
nodes.forEach(function(d) {
if (d.data.imports) d.data.imports.forEach(function(i) {
imports.push(map[d.data.name].path(map[i]));
});
});
return imports;
}
// update data function
function updateData() {
d3.json("data1.json", function(error, classes) {
if (error) throw error;
var root = packageHierarchy(classes)
.sum(function(d) { return d.size; });
var svg = d3.select("body").transition();
});
}
</script>
</div>
</div>
</body>
<div id="option">
<input name="updateButton"
type="button"
value="Update"
onclick="updateData()"
/>
</div>
</html>
data1.json
[
{
"name": "flare.A.dataA",
"imports": [
"flare.B.dataB"
]
},
{
"name": "flare.B.dataB",
"imports": [
"flare.A.dataA"
]
}
]
data2.json
[
{
"name": "flare.A.newdataA",
"imports": [
"flare.B.newdataB"
]
},
{
"name": "flare.B.newdataB",
"imports": [
"flare.A.newdataA"
]
}
]
I can’t find any examples of an edge bundle chart with an update button. Any help is appreciated!