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