|
<!DOCTYPE html> |
|
<html lang="en"> |
|
<head> |
|
<meta charset="utf-8"> |
|
<title>Force Layout with multiple labelled edges between nodes</title> |
|
<style type="text/css"> |
|
@import url(https://fonts.googleapis.com/css?family=Open+Sans); |
|
|
|
body { |
|
background: #333333; |
|
color: white; |
|
} |
|
text { |
|
fill: white; |
|
font-family: 'Open Sans'; |
|
} |
|
circle { |
|
stroke: white; |
|
stroke-width: 1.5px; |
|
} |
|
path.link, path.textpath { |
|
fill: none; |
|
stroke: #cccccc; |
|
stroke-width: 0.5px; |
|
} |
|
path.invis { |
|
fill: none; |
|
stroke-width: 0; |
|
} |
|
</style> |
|
</head> |
|
<body> |
|
<script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script> |
|
<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script> |
|
<script type="text/javascript"> |
|
|
|
var data = { |
|
edges: [ |
|
{ |
|
source: {id: 0, label: ""}, |
|
target: {id: 0, label: ""}, |
|
value: "Walk around in..." |
|
}, |
|
{ |
|
source: {id: 0, label: ""}, |
|
target: {id: 0, label: ""}, |
|
value: "Walk around in circles" |
|
}, |
|
{ |
|
source: {id: 0, label: ""}, |
|
target: {id: 0, label: ""}, |
|
value: "Walk around in circles," |
|
}, |
|
{ |
|
source: {id: 0, label: ""}, |
|
target: {id: 0, label: ""}, |
|
value: "walk around in circles" |
|
}, |
|
{ |
|
source: {id: 0, label: ""}, |
|
target: {id: 0, label: ""}, |
|
value: "I don't need to" |
|
}, |
|
] |
|
}; |
|
|
|
function myGraph() { |
|
this.addNode = function (n) { |
|
if (!findNode(n.id)) { |
|
nodes.push({"id": n.id, "label": n.label}); |
|
update(); |
|
} |
|
}; |
|
|
|
this.addLink = function (source, target, value) { |
|
links.push({"source": findNode(source.id), "target": findNode(target.id), "value": value}); |
|
update(); |
|
}; |
|
|
|
this.initialize = function() { |
|
data.edges.forEach(function(d) { |
|
graph.addNode(d.source); |
|
graph.addNode(d.target); |
|
graph.addLink(d.source, d.target, d.value); |
|
}); |
|
}; |
|
|
|
var findNode = function (nodeId) { |
|
for (var i in nodes) { |
|
if (nodes[i].id === nodeId) { |
|
return nodes[i]; |
|
} |
|
}; |
|
}; |
|
|
|
var countSiblingLinks = function(source, target) { |
|
var count = 0; |
|
for(var i = 0; i < links.length; ++i){ |
|
if( (links[i].source.id == source.id && links[i].target.id == target.id) || (links[i].source.id == target.id && links[i].target.id == source.id) ) |
|
count++; |
|
}; |
|
return count; |
|
}; |
|
|
|
var getSiblingLinks = function(source, target) { |
|
var siblings = []; |
|
for(var i = 0; i < links.length; ++i){ |
|
if( (links[i].source.id == source.id && links[i].target.id == target.id) || (links[i].source.id == target.id && links[i].target.id == source.id) ) |
|
siblings.push(links[i].value); |
|
}; |
|
return siblings; |
|
}; |
|
|
|
var w = window.innerWidth - 20, |
|
h = window.innerHeight, |
|
middle = w/2; |
|
var linkDistance = 400; |
|
|
|
var colors = d3.scale.category20(); |
|
|
|
var svg = d3.select("body") |
|
.append("svg:svg") |
|
.attr("width", w) |
|
.attr("height", h) |
|
.style("z-index", -10) |
|
.attr("id", "svg"); |
|
|
|
var force = d3.layout.force(); |
|
|
|
var nodes = force.nodes(), |
|
links = force.links(); |
|
|
|
var update = function () { |
|
|
|
var path = svg.selectAll("path.link") |
|
.data(force.links()); |
|
|
|
path.enter().append("svg:path") |
|
.attr("id", function (d) { |
|
return d.source.id + "-" + d.value + "-" + d.target.id; |
|
}) |
|
.attr("class", "link"); |
|
|
|
path.exit().remove(); |
|
|
|
var pathInvis = svg.selectAll("path.invis") |
|
.data(force.links()); |
|
|
|
pathInvis.enter().append("svg:path") |
|
.attr("id", function (d) { |
|
return "invis_" + d.source.id + "-" + d.value + "-" + d.target.id; |
|
}) |
|
.attr("class", "invis"); |
|
|
|
pathInvis.exit().remove(); |
|
|
|
var pathLabel = svg.selectAll(".pathLabel") |
|
.data(force.links()); |
|
|
|
pathLabel.enter().append("g").append("svg:text") |
|
.attr("class", "pathLabel") |
|
.append("svg:textPath") |
|
.attr("startOffset", "50%") |
|
.attr("text-anchor", "middle") |
|
.attr("xlink:href", function(d) { return "#invis_" + d.source.id + "-" + d.value + "-" + d.target.id; }) |
|
.style("fill", "#cccccc") |
|
.style("font-size", 11) |
|
.text(function(d) { return d.value; }); |
|
|
|
var node = svg.selectAll("g.node") |
|
.data(force.nodes()); |
|
|
|
var nodeEnter = node.enter().append("g") |
|
.attr("class", "node") |
|
.call(force.drag); |
|
|
|
nodeEnter.append("svg:circle") |
|
.attr("r", 4) |
|
.attr("id", function (d) { |
|
return "Node;" + d.id; |
|
}) |
|
.attr("class", "nodeStrokeClass") |
|
.attr("fill", "#fa5c4f") |
|
|
|
nodeEnter.append("svg:text") |
|
.attr("class", "textClass") |
|
.attr("x", 20) |
|
.attr("y", ".31em") |
|
.text(function (d) { |
|
return d.label; |
|
}); |
|
|
|
node.exit().remove(); |
|
|
|
function arcPath(leftHand, d) { |
|
var x1 = leftHand ? d.source.x : d.target.x, |
|
y1 = leftHand ? d.source.y : d.target.y, |
|
x2 = leftHand ? d.target.x : d.source.x, |
|
y2 = leftHand ? d.target.y : d.source.y, |
|
dx = x2 - x1, |
|
dy = y2 - y1, |
|
dr = Math.sqrt(dx * dx + dy * dy), |
|
drx = dr, |
|
dry = dr, |
|
sweep = leftHand ? 0 : 1; |
|
siblingCount = countSiblingLinks(d.source, d.target) |
|
xRotation = 0, |
|
largeArc = 0; |
|
|
|
if (dr === 0) { |
|
sweep = 0; |
|
xRotation = -180; |
|
largeArc = 1; |
|
drx = 120; |
|
dry = 120; |
|
x2 = x2 + 1; |
|
y2 = y2 + 1; |
|
} |
|
|
|
if (siblingCount > 1) { |
|
var siblings = getSiblingLinks(d.source, d.target); |
|
var arcScale = d3.scale.ordinal() |
|
.domain(siblings) |
|
.rangePoints([1, siblingCount]); |
|
drx = drx/(1 + (1/siblingCount) * (arcScale(d.value) - 1)); |
|
dry = dry/(1 + (1/siblingCount) * (arcScale(d.value) - 1)); |
|
} |
|
|
|
return "M" + x1 + "," + y1 + "A" + drx + ", " + dry + " " + xRotation + ", " + largeArc + ", " + sweep + " " + x2 + "," + y2; |
|
} |
|
|
|
force.on("tick", function(e) { |
|
var q = d3.geom.quadtree(nodes), |
|
i = 0, |
|
n = nodes.length, |
|
k = .1 * e.alpha; |
|
|
|
while (++i < n) q.visit(collide(nodes[i])); |
|
|
|
node.attr("transform", function (d) { |
|
return "translate(" + d.x + "," + d.y + ")"; |
|
}); |
|
|
|
path.attr("d", function(d) { |
|
return arcPath(true, d); |
|
}); |
|
|
|
pathInvis.attr("d", function(d) { |
|
return arcPath(d.source.x < d.target.x, d); |
|
}); |
|
}); |
|
|
|
force |
|
.charge(-10) |
|
.friction(.1) |
|
.linkDistance(linkDistance) |
|
.size([w, h]) |
|
.start(); |
|
keepNodesOnTop(); |
|
|
|
} |
|
|
|
update(); |
|
|
|
function collide(node) { |
|
var r = node.radius + 16, |
|
nx1 = node.x - r, |
|
nx2 = node.x + r, |
|
ny1 = node.y - r, |
|
ny2 = node.y + r; |
|
return function(quad, x1, y1, x2, y2) { |
|
if (quad.point && (quad.point !== node)) { |
|
var x = node.x - quad.point.x, |
|
y = node.y - quad.point.y, |
|
l = Math.sqrt(x * x + y * y), |
|
r = node.radius + quad.point.radius; |
|
if (l < r) { |
|
l = (l - r) / l * .5; |
|
node.x -= x *= l; |
|
node.y -= y *= l; |
|
quad.point.x += x; |
|
quad.point.y += y; |
|
} |
|
} |
|
return x1 > nx2 || x2 < nx1 || y1 > ny2 || y2 < ny1; |
|
}; |
|
} |
|
} |
|
|
|
function drawGraph() { |
|
graph = new myGraph(); |
|
graph.initialize(); |
|
} |
|
|
|
drawGraph(); |
|
|
|
function keepNodesOnTop() { |
|
$(".nodeStrokeClass").each(function( index ) { |
|
var gNode = this.parentNode; |
|
gNode.parentNode.appendChild(gNode); |
|
}); |
|
} |
|
|
|
</script> |
