forked from billdwhite's block: Circle Pack Label Truncation
Created
December 5, 2017 06:16
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Circle Pack Label Truncation
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| license: mit |
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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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