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Dynamically changing force parameters
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title>Dynamically changing force parameters</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="http://d3js.org/d3.v3.min.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>
<div id="fig"></div>
<div class="control">
<label for="charge">Charge: </label>
<input type="range" class="charge" name="charge" min="-200" max="100" value="-120">
<span class="value"></span>
</div>
<div class="control">
<label for="link">Link Distance: </label>
<input type="range" class="link" name="link" value="30">
<span class="value"></span>
</div>
<input type="reset">
<script>
$(document).ready( function() {
$( '.control input' ).change(function() {
v = $(this).val();
$(this).next().text(v);
});
var width = 960,
height = 450;
var linkDistance = 30;
var charge = -120;
var color = d3.scale.category20();
var force = d3.layout.force()
.charge(function() { return charge; } )
.linkDistance(function() { return linkDistance; } )
.size([width, height]);
var svg = d3.select("#fig").append("svg")
.attr("width", width)
.attr("height", height);
d3.json("miserables.json", function(error, graph) {
force
.nodes(graph.nodes)
.links(graph.links)
.start();
var link = svg.selectAll(".link")
.data(graph.links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d) { return Math.sqrt(d.value); });
var node = svg.selectAll(".node")
.data(graph.nodes)
.enter().append("circle")
.attr("class", "node")
.attr("r", 5)
.style("fill", function(d) { return color(d.group); })
.call(force.drag);
node.append("title")
.text(function(d) { return d.name; });
force.on("tick", function() {
link.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; });
node.attr("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; });
});
d3.select("input[name=charge]").on("change", function() {
force.stop();
charge = this.value;
force.start();
});
d3.select("input[name=link]").on("change", function() {
force.stop();
linkDistance = this.value;
force.start();
});
d3.select("input[type=reset]").on("click", function() {
force.stop();
linkDistance = 30;
charge = -120;
$(".value").text("");
force.start();
});
});
});
</script>
</body>
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]
}
* {
font-family: 'Helvetica Neue', Helvetica, sans-serif;
}
/* Force Directed Graph */
.node {
stroke: #fff;
stroke-width: 1.5px;
}
.link {
stroke: #999;
stroke-opacity: .6;
}
/* Range Controls */
.control {
border: 1px solid #ccc;
padding: 0.25em;
margin: 0.5em 0;
display: inline-block;
}
.control>* {
vertical-align: middle;
}
.control input {
margin: 0 1em;
display: inline-block;
}
.control .value {
display: inline-block;
min-width: 2em;
text-align: right;
}
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