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- <!DOCTYPE html>
- <meta charset="utf-8">
- <style>
- .node {
- cursor: pointer;
- }
- .node:hover {
- stroke: #000;
- stroke-width: 1.5px;
- }
- .node--leaf {
- fill: white;
- }
- .label {
- font: 0px "Helvetica Neue", Helvetica, Arial, sans-serif;
- text-anchor: middle;
- text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, -1px 0 0 #fff, 0 -1px 0 #fff;
- }
- .label,
- .node--root,
- .node--leaf {
- pointer-events: none;
- }
- </style>
- <!-- <body> -->
- <p>Twitter</p>
- <svg width="960" height="960"></svg>
- <script src="https://d3js.org/d3.v4.min.js"></script>
- <script>
- var svg2 = d3.select("svg"),
- margin = 20,
- diameter = +svg2.attr("width"),
- g = svg2.append("g").attr("transform", "translate(" + diameter / 2 + "," + diameter / 2 + ")");
- var color = d3.scaleLinear()
- .domain([-1, 5])
- .range(["hsl(152,80%,80%)", "hsl(228,30%,40%)"])
- .interpolate(d3.interpolateHcl);
- var pack = d3.pack()
- .size([diameter - margin, diameter - margin])
- .padding(2);
- d3.json("data1.json", function(error, root) {
- if (error) throw error;
- root = d3.hierarchy(root)
- .sum(function(d) { return d.size; })
- .sort(function(a, b) { return b.value - a.value; });
- var focus = root,
- nodes = pack(root).descendants(),
- view;
- var circle = g.selectAll("circle")
- .data(nodes)
- .enter().append("circle")
- .attr("class", function(d) { return d.parent ? d.children ? "node" : "node node--leaf" : "node node--root"; })
- .style("fill", function(d) { return d.children ? color(d.depth) : null; })
- .on("click", function(d) { if (focus !== d) zoom(d), d3.event.stopPropagation(); });
- var text = g.selectAll("text")
- .data(nodes)
- .enter().append("text")
- .attr("class", "label")
- .style("fill-opacity", function(d) { return d.parent === root ? 1 : 0; })
- .style("display", function(d) { return d.parent === root ? "inline" : "none"; })
- .text(function(d) { return d.data.name; });
- var node = g.selectAll("circle,text");
- svg2
- .style("background", color(-1))
- .on("click", function() { zoom(root); });
- zoomTo([root.x, root.y, root.r * 2 + margin]);
- function zoom(d) {
- var focus0 = focus; focus = d;
- var transition = d3.transition()
- .duration(d3.event.altKey ? 7500 : 750)
- .tween("zoom", function(d) {
- var i = d3.interpolateZoom(view, [focus.x, focus.y, focus.r * 2 + margin]);
- return function(t) { zoomTo(i(t)); };
- });
- transition.selectAll("text")
- .filter(function(d) { return d.parent === focus || this.style.display === "inline"; })
- .style("fill-opacity", function(d) { return d.parent === focus ? 1 : 0; })
- .on("start", function(d) { if (d.parent === focus) this.style.display = "inline"; })
- .on("end", function(d) { if (d.parent !== focus) this.style.display = "none"; });
- }
- function zoomTo(v) {
- var k = diameter / v[2]; view = v;
- node.attr("transform", function(d) { return "translate(" + (d.x - v[0]) * k + "," + (d.y - v[1]) * k + ")"; });
- circle.attr("r", function(d) { return d.r * k; });
- }
- });
- </script>
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