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109 lines
3.1 KiB
109 lines
3.1 KiB
3 years ago
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/* ------------------------------------------------------------------------------
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*
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* # D3.js - sunbirst diagram with zoom
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*
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* Demo sunbirst diagram setup with interactive zoom
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*
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* Version: 1.0
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* Latest update: August 1, 2015
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*
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* ---------------------------------------------------------------------------- */
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$(function () {
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// Initialize chart
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sunburstZoomable('#d3-sunburst-zoom', 400, 400);
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// Chart setup
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function sunburstZoomable(element, width, height) {
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// Basic setup
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// ------------------------------
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// Define main variables
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var radius = Math.min(width, height) / 2;
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// Construct scales
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// ------------------------------
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// Horizontal
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var x = d3.scale.linear()
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.range([0, 2 * Math.PI]);
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// Vertical
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var y = d3.scale.sqrt()
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.range([0, radius]);
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// Colors
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var color = d3.scale.category20c();
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// Create chart
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// ------------------------------
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var svg = d3.select(element).append("svg")
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.attr("width", width)
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.attr("height", height)
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.append("g")
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.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
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// Construct chart layout
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// ------------------------------
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// Partition layout
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var partition = d3.layout.partition()
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.value(function(d) { return d.size; });
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// Arc
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var arc = d3.svg.arc()
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.startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x))); })
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.endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x + d.dx))); })
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.innerRadius(function(d) { return Math.max(0, y(d.y)); })
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.outerRadius(function(d) { return Math.max(0, y(d.y + d.dy)); });
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// Load data
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// ------------------------------
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d3.json("assets/demo_data/d3/sunburst/sunburst_basic.json", function(error, root) {
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// Append sunbirst
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var path = svg.selectAll(".d3-sunbirst")
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.data(partition.nodes(root))
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.enter()
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.append("path")
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.attr("class", "d3-sunbirst")
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.attr("d", arc)
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.style("fill", function(d) { return color((d.children ? d : d.parent).name); })
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.on("click", click);
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// Run transition on click
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function click(d) {
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path.transition()
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.duration(750)
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.attrTween("d", arcTween(d));
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}
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});
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// Interpolate the scales
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function arcTween(d) {
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var xd = d3.interpolate(x.domain(), [d.x, d.x + d.dx]),
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yd = d3.interpolate(y.domain(), [d.y, 1]),
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yr = d3.interpolate(y.range(), [d.y ? 20 : 0, radius]);
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return function(d, i) {
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return i
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? function(t) { return arc(d); }
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: function(t) { x.domain(xd(t)); y.domain(yd(t)).range(yr(t)); return arc(d); };
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};
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}
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}
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});
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