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Circle Pack Label Truncation
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<!DOCTYPE HTML> | |
<html> | |
<head> | |
<title>Circle Pack with Truncated Labels</title> | |
<meta charset="utf-8"> | |
<!-- poor man's browser detection --> | |
<!--[if IE]><script type="text/javascript">window['isIE'] = true;</script><![endif]--> | |
<script type="text/javascript" src="http://www.billdwhite.com/wordpress/wp-content/js/d3/d3.js"></script> | |
<style type="text/css"> | |
html, body { | |
overflow: hidden; | |
margin: 0; | |
font-family: "Helvetica Neue", Helvetica; | |
} | |
text { | |
font-size: 11px; | |
pointer-events: none; | |
} | |
text.parent { | |
fill: #1f77b4; | |
} | |
circle { | |
fill: #ccc; | |
stroke: #999; | |
pointer-events: all; | |
} | |
circle.parent { | |
fill: #1f77b4; | |
fill-opacity: .1; | |
stroke: steelblue; | |
} | |
circle.parent:hover { | |
stroke: #ff7f0e; | |
stroke-width: .5px; | |
} | |
circle.child { | |
pointer-events: none; | |
} | |
</style> | |
</head> | |
<body> | |
<script type="text/javascript"> | |
var w = 650, | |
h = 565, | |
r = 500, | |
x = d3.scale.linear().range([0, r]), | |
y = d3.scale.linear().range([0, r]), | |
node, | |
root; | |
var pack = d3.layout.pack() | |
.size([r, r]) | |
.value(function(d) { return d.size; }); | |
var vis = d3.select("body").insert("svg:svg", "h2") | |
.attr("width", w) | |
.attr("height", h) | |
.append("svg:g") | |
.attr("transform", "translate(" + (w - r) / 2 + "," + (h - r) / 2 + ")"); | |
d3.json("http://www.billdwhite.com/wordpress/wp-content/data/flare2.json", function(data) { | |
node = root = data; | |
var nodes = pack.nodes(root); | |
vis.selectAll("circle") | |
.data(nodes) | |
.enter().append("svg:circle") | |
.attr("class", function(d) { return d.children ? "parent" : "child"; }) | |
.attr("cx", function(d) { return d.x; }) | |
.attr("cy", function(d) { return d.y; }) | |
.attr("r", function(d) { return d.r; }) | |
.on("click", function(d) { return zoom(node == d ? root : d); }); | |
vis.selectAll("text") | |
.data(nodes) | |
.enter().append("svg:text") | |
.attr("class", function(d) { return d.children ? "parent" : "child"; }) | |
.attr("x", function(d) { return d.x; }) | |
.attr("y", function(d) { return d.y; }) | |
.attr("dy", ".35em") | |
.attr("text-anchor", "middle") | |
.style("opacity", function(d) { return d.r > 20 ? 1 : 0; }) | |
.text(function(d) { | |
return d.name; | |
}); | |
d3.select(window).on("click", function() { zoom(root); }); | |
}); | |
function zoom(d, i) { | |
var k = r / d.r / 2; | |
x.domain([d.x - d.r, d.x + d.r]); | |
y.domain([d.y - d.r, d.y + d.r]); | |
var t = vis.transition() | |
.duration(d3.event.altKey ? 7500 : 750); | |
t.selectAll("circle") | |
.attr("cx", function(d) { return x(d.x); }) | |
.attr("cy", function(d) { return y(d.y); }) | |
.attr("r", function(d) { return k * d.r; }); | |
// updateCounter is a hacky way to determine when transition is finished | |
var updateCounter = 0; | |
t.selectAll("text") | |
.style("opacity", 0) | |
.attr("x", function(d) { return x(d.x); }) | |
.attr("y", function(d) { return y(d.y); }) | |
.each(function(d, i) { | |
updateCounter++; | |
}) | |
.each("end", function(d, i) { | |
updateCounter--; | |
if (updateCounter == 0) { | |
adjustLabels(k); | |
} | |
}); | |
node = d; | |
d3.event.stopPropagation(); | |
} | |
function adjustLabels(k) { | |
vis.selectAll("text") | |
.style("opacity", function(d) { | |
return k * d.r > 20 ? 1 : 0; | |
}) | |
.text(function(d) { | |
return d.name; | |
}) | |
.filter(function(d) { | |
d.tw = this.getComputedTextLength(); | |
return (Math.PI*(k*d.r)/2) < d.tw; | |
}) | |
.each(function(d) { | |
var proposedLabel = d.name; | |
var proposedLabelArray = proposedLabel.split(''); | |
while ((d.tw > (Math.PI*(k*d.r)/2) && proposedLabelArray.length)) { | |
// pull out 3 chars at a time to speed things up (one at a time is too slow) | |
proposedLabelArray.pop();proposedLabelArray.pop(); proposedLabelArray.pop(); | |
if (proposedLabelArray.length===0) { | |
proposedLabel = ""; | |
} else { | |
proposedLabel = proposedLabelArray.join('') + "..."; // manually truncate with ellipsis | |
} | |
d3.select(this).text(proposedLabel); | |
d.tw = this.getComputedTextLength(); | |
} | |
}); | |
} | |
</script> | |
</body> | |
</html> |
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