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force with link labels
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<html> | |
<head> | |
<title>Force with Labelled Links</title> | |
<script src="http://mbostock.github.com/d3/d3.js?2.9.2"></script> | |
<style type="text/css"> | |
.node { | |
fill: #88f; | |
stroke: #44a; | |
stroke-width: 1px; | |
} | |
.aEnd, | |
.zEnd { | |
fill: #444; | |
font-family: helvetica; | |
font-size: 8pt; | |
} | |
.default { | |
stroke: #fbb; | |
stroke-width: 4px; | |
} | |
.outline { | |
stroke: #844; | |
stroke-width: 6px; | |
} | |
</style> | |
</head> | |
<body> | |
<div id="chart"></div> | |
<script type="text/javascript"> | |
var topo = {}; | |
topo.nodes = [ | |
{ 'name' : 'Node 1' }, | |
{ 'name' : 'Node 2' }, | |
{ 'name' : 'Node 3' }, | |
{ 'name' : 'Node 4' }, | |
{ 'name' : 'Node 5' }, | |
{ 'name' : 'Node 6' }, | |
{ 'name' : 'Node 7' } | |
]; | |
topo.links = [ | |
{ 'a' : ['Node 1', 'one'], 'z' : ['Node 2', 'two'] }, | |
{ 'a' : ['Node 2', 'three'], 'z' : ['Node 3', 'four'] }, | |
{ 'a' : ['Node 2', 'five'], 'z' : ['Node 4', 'six'] }, | |
{ 'a' : ['Node 1', 'seven'], 'z' : ['Node 5', 'eight'] }, | |
{ 'a' : ['Node 1', 'nine'], 'z' : ['Node 6', 'ten'] }, | |
{ 'a' : ['Node 1', 'eleven'], 'z' : ['Node 7', 'twelve'] } | |
]; | |
var div = d3.select("#chart"); | |
var vis = div.append("svg:svg") | |
.attr("class", "panel") | |
.attr("width", 800) | |
.attr("height", 600); | |
var data = parseTopo(topo); | |
var force = d3.layout.force() | |
.gravity(.05) | |
.charge(-400) | |
.distance(150) | |
.nodes(data.nodes) | |
.links(data.links) | |
.size([800, 600]); | |
force.on("tick", function(e) { | |
vis.selectAll("circle") | |
.attr("cx", function(d) { return d.x; }) | |
.attr("cy", function(d) { return d.y; }); | |
vis.selectAll("line") | |
.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; }); | |
vis.selectAll('text.aEnd') | |
.attr('x', function(d) { return xpos(d.source, d.target); }) | |
.attr('y', function(d) { return ypos(d.source, d.target); }); | |
}); | |
restart(); | |
function restart() { | |
force.start(); | |
var link = vis.selectAll("line") | |
.data(data.links).enter() | |
.insert("svg:g", "circle") // insert before the nodes | |
.attr('class', 'link'); | |
addLink(link); | |
var node = vis.selectAll("circle") | |
.data(data.nodes).enter() | |
.append("svg:circle") | |
.call(force.drag) | |
.attr("class", "node") | |
.attr("r", 10) | |
.attr("cx", function(d) { return d.x; }) | |
.attr("cy", function(d) { return d.y; }); | |
} | |
function parseTopo(topo, canvas) { | |
var data = {}; | |
data.links = topo.links.map(function (value) { | |
var nodes = topo.nodes; | |
var link = {}; | |
link.type = value.type || 'default'; | |
for (i = 0; i < nodes.length; i++) { | |
if (nodes[i].name === value.a[0]) { | |
link.source = i; | |
link.a = value.a[1]; | |
} | |
if (nodes[i].name === value.z[0]) { | |
link.target = i; | |
link.z = value.z[1]; | |
} | |
} | |
return link; | |
}); | |
data.nodes = topo.nodes; | |
return data; | |
}; | |
function xpos(s, t) { | |
var angle = Math.atan2(t.y - s.y, t.x - s.x); | |
return 75 * Math.cos(angle) + s.x; | |
}; | |
function ypos(s, t) { | |
var angle = Math.atan2(t.y - s.y, t.x - s.x); | |
return 75 * Math.sin(angle) + s.y; | |
}; | |
function addLink(l) { | |
l.append('svg:line') | |
.attr("class", "outline") | |
.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; }); | |
l.append('svg:line') | |
.attr("class", function(d) { return d.type; }) | |
.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; }); | |
l.append('svg:text') | |
.attr('class', 'aEnd') | |
.attr('x', function(d) { return d.source.x; }) | |
.attr('y', function(d) { return d.source.y; }) | |
.attr('text-anchor', 'middle') | |
.text(function(d) { return d.a; }); | |
}; | |
</script> | |
</body> | |
</html> |
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