This gist shows an example of transitions on a pie chart
Created
November 29, 2012 15:01
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Pie chart updates in D3.js
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script type="text/javascript" src="http://code.jquery.com/jquery.js"></script> | |
| <script type="text/javascript" src="http://d3js.org/d3.v2.js"></script> | |
| <script type="text/javascript" src="donut.js"></script> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| var innerRadius = 120; | |
| var outerRadius = 30; | |
| var width = 800; | |
| var height = 500; | |
| var pie = d3.layout.pie() | |
| .sort(null); | |
| var arc = d3.svg.arc() | |
| .innerRadius(innerRadius) | |
| .outerRadius(outerRadius); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .append("g") | |
| .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")"); | |
| var path = svg.selectAll("path").data(pie([1,1,1,1,1])) | |
| .enter().append("path") | |
| .attr("fill", "white") | |
| .attr("d", arc) | |
| .each(function(d) { this._current = d; }); // store the initial values | |
| $(svg).bind("monitor", worker); | |
| $(svg).trigger("monitor"); | |
| function worker(event) { | |
| var newRadius = getRandomRadius(); | |
| var jobs_counts = getRandomCounts(); | |
| var jobs_colors = ["green", "yellow", "red", "blue", "cyan"]; | |
| path = path.data(pie(jobs_counts)) | |
| .attr("fill", function(d,i) {return jobs_colors[i]}); | |
| path.transition().duration(500).attrTween("d", function(a) { | |
| var i = d3.interpolate(this._current, a), | |
| k = d3.interpolate(arc.outerRadius()(), newRadius); | |
| this._current = i(0); | |
| return function(t) { | |
| return arc.innerRadius(k(t)/4).outerRadius(k(t))(i(t)); | |
| }; | |
| }); | |
| setTimeout(function(){$(svg).trigger("monitor")}, 1000) | |
| } | |
| function getRandomCounts() { | |
| var arr = []; | |
| for (var i=0;i<5;i++) { | |
| arr.push(Math.floor(Math.random()*10)+1); | |
| } | |
| //console.log(arr); | |
| return (arr); | |
| } | |
| function getRandomRadius() { | |
| var newRadius = Math.floor(Math.random()*150); | |
| if (newRadius < 50) { | |
| newRadius = 50; | |
| } | |
| return newRadius; | |
| } | |
| </script> | |
| </body> | |
| </html> |
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