D3.v4 Sunburst chart with line focus on over

sunburst chart with extending line

forked from caravinden's block: D3.v4 Sunburst chart with line focus on over

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<meta charset="utf-8">
<style>
path { stroke: #fff;}
</style>
<body>
<h2 style='margin-left: 20%'>D3.v4 Sunburst chart with line focus on over</h2>
<div id='sunburst-chart-div'></div>
</body>
<script src="//d3js.org/d3.v4.min.js"></script>
<script>
var initSunburstChart = {
	xScale : '',
	yScale : '',
	draw: function(config) {
		me =this,
		root = config.data,
		domEle = config.element,
		margin = {width: 960, height: 500}, 
		radius = (Math.min(margin.width, margin.height) / 2) - 10,
		
		formatNumber = d3.format(",d"),
		xScale = d3.scaleLinear()
			.range([0, 2 * Math.PI]),
			
		yScale = d3.scaleSqrt()
			.range([0, radius]),
			
		color = d3.scaleOrdinal(d3.schemeCategory20),
		
		partition = d3.partition(),

arc = d3.arc()
			.startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, xScale(d.x0))); })
			.endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, xScale(d.x1))); })
			.innerRadius(function(d) { return Math.max(0, yScale(d.y0)); })
			.outerRadius(function(d) { return Math.max(0, yScale(d.y1)); }),

svg = d3.select("#"+domEle).append("svg")
			.attr("width", margin.width)
			.attr("height", margin.height)
		  .append("g")
			.attr("transform", "translate(" + margin.width / 2 + "," + (margin.height / 2) + ")")
  
		root = d3.hierarchy(root),
		root.sum(function(d) { return d.size; }),
		svg.selectAll("path")
			.data(partition(root).descendants())
			.enter().append("path")
			.attr('class', function(d) {return d.data.name;})
			.attr("d", arc)
			.style("fill", function(d) { return color((d.children ? d : d.parent).data.name); })
			.on('mouseover', me.onArcOver)
			.on('mouseout', me.onArcOut)
			.append("title")
			.text(function(d) { return d.data.name + "\n" + formatNumber(d.value); }),

g = svg.selectAll(".groups")
				.data(partition(root).descendants())
				.enter()
				.append("g")
				.attr('class', function(d) { return d.data.name+" outline";}),
	  
		g.append('line')
			.attr('class', function(d) { return d.data.name+"out-line out-line";})
			.attr('x1', 0)
			.attr('x2', 0)
			.attr('y1', 0)
			.attr('y2', -radius-50)
			.attr('stroke', '#000000')
			.style('visibility','hidden')
			.attr('stroke-dasharray',function(){ return (5,2)})
			.attr("transform", function(d) {
				return "rotate(" + (d.x1) * (360) + ")";
			}),
		g.append('line')
			.attr('class', function(d) { return d.data.name+"out-line1 out-line";})
			.attr('x1', 0)
			.attr('x2', 0)
			.attr('y1', 0)
			.attr('y2', -radius-50)
			.attr('stroke', '#000000')
			.style('visibility','hidden')
			.attr('stroke-dasharray',function(){ return (5,2)})
			.attr("transform", function(d) {			
				return "rotate(" + (d.x0) * (360) + ")";
			}),			
		d3.select(self.frameElement).style("height", margin.height + "px")	
	},
	onArcOver :function (d) {
		nodes = d.descendants().concat(d.ancestors()),
		t = nodes.map( function(d) { if(d.depth) return d;}),
		t = t.filter(Boolean),
		d3.select('.'+t[0].data.name+'out-line').style('visibility','visible'),
		d3.select('.'+t[0].data.name+'out-line1').style('visibility','visible');
	},
	onArcOut: function(d) {
		d3.selectAll('.out-line').style('visibility','hidden');
	}
}

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initSunburstChart.draw({
	data: data,
	element: 'sunburst-chart-div'
}); 
</script>

https://d3js.org/d3.v4.min.js