Created
April 15, 2020 04:39
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sankey
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<title>SANKEY Experiment</title> | |
<style> | |
.node rect { | |
cursor: move; | |
fill-opacity: .9; | |
shape-rendering: crispEdges; | |
} | |
.node text { | |
pointer-events: none; | |
text-shadow: 0 1px 0 #fff; | |
} | |
.link { | |
fill: none; | |
stroke: #000; | |
stroke-opacity: .2; | |
} | |
.link:hover { | |
stroke-opacity: .5; | |
} | |
</style> | |
<body> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<script src="sankey.js"></script> | |
<script> | |
var units = "Widgets"; | |
// set the dimensions and margins of the graph | |
var margin = {top: 10, right: 10, bottom: 10, left: 10}, | |
width = 700 - margin.left - margin.right, | |
height = 300 - margin.top - margin.bottom; | |
// format variables | |
var formatNumber = d3.format(",.0f"), // zero decimal places | |
format = function(d) { return formatNumber(d) + " " + units; }, | |
color = d3.scaleOrdinal(d3.schemeCategory20); | |
// append the svg object to the body of the page | |
var svg = d3.select("body").append("svg") | |
.attr("width", width + margin.left + margin.right) | |
.attr("height", height + margin.top + margin.bottom) | |
.append("g") | |
.attr("transform", | |
"translate(" + margin.left + "," + margin.top + ")"); | |
// Set the sankey diagram properties | |
var sankey = d3.sankey() | |
.nodeWidth(36) | |
.nodePadding(40) | |
.size([width, height]); | |
var path = sankey.link(); | |
// load the data | |
d3.json("sankey.json", function(error, graph) { | |
sankey | |
.nodes(graph.nodes) | |
.links(graph.links) | |
.layout(32); | |
// add in the links | |
var link = svg.append("g").selectAll(".link") | |
.data(graph.links) | |
.enter().append("path") | |
.attr("class", "link") | |
.attr("d", path) | |
.style("stroke-width", function(d) { return Math.max(1, d.dy); }) | |
.sort(function(a, b) { return b.dy - a.dy; }); | |
// add the link titles | |
link.append("title") | |
.text(function(d) { | |
return d.source.name + " → " + | |
d.target.name + "\n" + format(d.value); }); | |
// add in the nodes | |
var node = svg.append("g").selectAll(".node") | |
.data(graph.nodes) | |
.enter().append("g") | |
.attr("class", "node") | |
.attr("transform", function(d) { | |
return "translate(" + d.x + "," + d.y + ")"; }) | |
.call(d3.drag() | |
.subject(function(d) { | |
return d; | |
}) | |
.on("start", function() { | |
this.parentNode.appendChild(this); | |
}) | |
.on("drag", dragmove)); | |
// add the rectangles for the nodes | |
node.append("rect") | |
.attr("height", function(d) { return d.dy; }) | |
.attr("width", sankey.nodeWidth()) | |
.style("fill", function(d) { | |
return d.color = color(d.name.replace(/ .*/, "")); }) | |
.style("stroke", function(d) { | |
return d3.rgb(d.color).darker(2); }) | |
.append("title") | |
.text(function(d) { | |
return d.name + "\n" + format(d.value); }); | |
// add in the title for the nodes | |
node.append("text") | |
.attr("x", -6) | |
.attr("y", function(d) { return d.dy / 2; }) | |
.attr("dy", ".35em") | |
.attr("text-anchor", "end") | |
.attr("transform", null) | |
.text(function(d) { return d.name; }) | |
.filter(function(d) { return d.x < width / 2; }) | |
.attr("x", 6 + sankey.nodeWidth()) | |
.attr("text-anchor", "start"); | |
// the function for moving the nodes | |
function dragmove(d) { | |
d3.select(this) | |
.attr("transform", | |
"translate(" | |
+ d.x + "," | |
+ (d.y = Math.max( | |
0, Math.min(height - d.dy, d3.event.y)) | |
) + ")"); | |
sankey.relayout(); | |
link.attr("d", path); | |
} | |
}); | |
</script> | |
</body> |
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