D3 Examples - Data Breaches Force

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<!DOCTYPE html>
<meta charset="utf-8">
<link href="https://fonts.googleapis.com/css?family=Merriweather" rel="stylesheet">
<style>
body {
        font-family: 'Merriweather', serif;
      }
a {
    color: white;
}
div.tooltip {
  position: absolute;
  text-align: center;
  padding: 2px;
  font: 12px;
  border: 0px;
  border-radius: 10px;
}
​
.axis path,
.axis line {
  fill: none;
  stroke: lightsteelblue;
  shape-rendering: geometricPrecision;
}
​
​
.cells path {
  fill: none;
  pointer-events: all;
}
​
.cells :hover circle {
  fill: red;
}
​
</style>
  <h1>Data Breaches</h1>
  <h2>Number of stolen Records over Year</h2>
<svg width="1000" height="800"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
​
var svg = d3.select("svg"),
    margin = {top: 60, right: 350, bottom: 110, left: 100},
    margin2 = {top: 60, right: 590, bottom: 100, left: 400},
    width = +svg.attr("width") - margin.left - margin.right,
    height = +svg.attr("height") - margin.top - margin.bottom,
    width2 = +svg.attr("width") - margin2.right;
​
var formatValue = d3.format(",d");
var parseTime = d3.timeParse("%Y");
​
var x = d3.scaleTime().range([0, width]), 
    y = d3.scaleLinear().range([0, height])
    y2 = y.copy();
​
var g = svg.append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
​
  
var focus = svg.append("g")
    .attr("class", "focus")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
​
    
  
var context = svg.append("g")
    .attr("class", "context")
    .attr("transform", "translate(" + 20 + "," + 58 + ")");
  
d3.csv("Data_Breaches.csv", type, function(error, data) {
  if (error) throw error;
​
  x.domain(d3.extent(data, function(d) { return d.Year; }));
  y.domain(d3.extent(data, function(d) { return d.RecordsStolen; }));
    y2.domain(d3.extent(data, function(d) { return d.RecordsStolen; }));
​
  var simulation = d3.forceSimulation(data)
      .force("x", d3.forceX(function(d) { return x(d.Year); }).strength(1))
      .force("y", d3.forceY(function(d) { return y(d.RecordsStolen); }).strength(1))
      .force("collide", d3.forceCollide(4))
      .stop();
​
  for (var i = 0; i < 120; ++i) simulation.tick();
​
  
  var xAxis = d3.axisTop(x),
    yAxis = d3.axisLeft(y).ticks(20, ".0s");
  
  focus.append("g")
      .attr("class", "axis axis--x")
      .call(xAxis);
​
focus.append("g")
      .attr("class", "axis axis--y")
      .call(yAxis);
  
  var cell = g.append("g")
      .attr("class", "cells")
    .selectAll("g").data(d3.voronoi()
        .extent([[-margin.left, -margin.top], [width + margin.right, height + margin.top]])
        .x(function(d) { return d.x; })
        .y(function(d) { return d.y; })
      .polygons(data)).enter().append("g");
​
  var div = d3.select("body").append("div")
    .attr("class", "tooltip")
    .style("opacity", 0);
​
  // set the colour scale
  var color = d3.scaleOrdinal(d3.schemeCategory20);
​
​
  cell.append("circle")
    .attr('class', 'dot')
    .attr("r", 3)
    .attr("cx", function(d) { return d.data.x; })
    .attr("cy", function(d) { return d.data.y; })
        .style("fill", function(d) { return color(d.data.MethodOfLeak); });
    cell.on("mouseover", function(d) {
    div.transition()
      .duration(400)
      .style("background-color", color(d.data.MethodOfLeak) )
      .style("opacity", .8);
        div.html(
        '<a href= "'+d.data.Source+'" target="_blank">' + //with a link
        d.data.Entity +
        "</a>" +
        "<br/>Records: <b>"  + numberWithCommas(d.data.RecordsStolen)+
        "</b><br/>Method Of Leak: <b>"  + d.data.MethodOfLeak +"</b>")     
        .style("left", (d3.event.pageX+10) + "px")             
        .style("top", (d3.event.pageY - 28) + "px");
       }); 
  
  // draw legend
  var legend = svg.append("g")
    .attr("class", "legend")
    .attr("transform", "translate(120,"+height/2+")");
  var legendItem = legend.selectAll(".legendItem")
      .data(color.domain())
      .enter().append("g")
      .attr("class", "legend")
      .attr("transform", function(d, i) { return "translate(220," + i * 20 + ")"; });
​
  // draw legend colored rectangles
  legendItem.append("rect")
      .attr("x", width - 18)
      .attr("width", 18)
      .attr("height", 18)
      .style("fill", color);
​
  // draw legendItem text
  legendItem.append("text")
      .attr("x", width - 24)
      .attr("y", 9)
      .attr("dy", ".35em")
      .style("text-anchor", "end")
      .text(function(d) { return d;})
​
});
​
​
     
focus.append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 0 - margin.left)
      .attr("x",0 - (height / 2))
      .attr("dy", "1em")
      .style("text-anchor", "middle")
      .text("Records Stolen");  
  
svg.append("text")             
      .attr("transform",
            "translate(" + ((width + margin.left)/2) + " ," + 30 + ")")
      .style("text-anchor", "middle")
      .text("Year");
​
function type(d) {
  d.Year = parseTime(d.Year);
  if (!d.RecordsStolen) return;
  d.RecordsStolen = +d.RecordsStolen;
  return d;
}  
  function numberWithCommas(x) {
    return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}
​
​
</script>
​
    