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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Bubble Chart Experiment</title>
</head>
<style>
a, a:visited, a:active {
  color: #444;
}

.container {
  max-width: 900px;
  margin: auto;
}

.button {
  min-width: 130px;
  padding: 4px 5px;
  cursor: pointer;
  text-align: center;
  font-size: 13px;
  border: 1px solid #e0e0e0;
  text-decoration: none;
}

.button.active {
  background: #000;
  color: #fff;
}

#vis {
  width: 940px;
  height: 600px;
  clear: both;
  margin-bottom: 10px;
}

#toolbar {
  margin-top: 10px;
}

.year {
  font-size: 21px;
  fill: #aaa;
  cursor: default;
}

.tooltip {
	position: absolute;
	top: 100px;
	left: 100px;
  -moz-border-radius:5px;
	border-radius: 5px;
  border: 2px solid #000;
  background: #fff;
	opacity: .9;
  color: black;
	padding: 10px;
	width: 300px;
	font-size: 12px;
	z-index: 10;
}

.tooltip .title {
	font-size: 13px;
}

.tooltip .name {
  font-weight:bold;
}

.footer {
  text-align: center;
}

</style>
<body>
  <div class="container">
    <h1>Gates Foundation Educational Spending</h1>
    <div id="toolbar">
      <a href="#" id="all" class="button active">All 2017 Films</a>
      <a href="#" id="year" class="button">By Rotten</a>
    </div>
    <div id="vis"></div>
</body>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
function bubbleChart() {
  // Constants for sizing
  var width = 960;
  var height = 960;

// tooltip for mouseover functionality
  var tooltip = floatingTooltip('gates_tooltip', 240);

// Locations to move bubbles towards, depending
  // on which view mode is selected.
  var center = { x: width / 2, y: height / 3 };

var yearCenters = {
    "81-100": { x: width / 5, y: height / 2 },
    "61-80": { x: width / 3, y: height / 2 },
    "41-60": { x: width / 2, y: height / 2 }
    "21-40": { x: 2 * width / 3, y: height / 2 }
  	"0-20": { x: 4 * width / 5, y: height / 2 }
  };

// X locations of the year titles.
  var yearsTitleX = {
    "81-100": 160,
    "61-80": 360,
    "41-60": width / 2,
    "21-40": width - 360,
    "0-20": width - 160
  };

// @v4 strength to apply to the position forces
  var forceStrength = 0.03;

// These will be set in create_nodes and create_vis
  var svg = null;
  var bubbles = null;
  var nodes = [];

// Charge function that is called for each node.
  // As part of the ManyBody force.
  // This is what creates the repulsion between nodes.
  //
  // Charge is proportional to the diameter of the
  // circle (which is stored in the radius attribute
  // of the circle's associated data.
  //
  // This is done to allow for accurate collision
  // detection with nodes of different sizes.
  //
  // Charge is negative because we want nodes to repel.
  // @v4 Before the charge was a stand-alone attribute
  //  of the force layout. Now we can use it as a separate force!
  function charge(d) {
    return -Math.pow(d.radius, 2.0) * forceStrength;
  }

// Here we create a force layout and
  // @v4 We create a force simulation now and
  //  add forces to it.
  var simulation = d3.forceSimulation()
    .velocityDecay(0.2)
    .force('x', d3.forceX().strength(forceStrength).x(center.x))
    .force('y', d3.forceY().strength(forceStrength).y(center.y))
    .force('charge', d3.forceManyBody().strength(charge))
    .on('tick', ticked);

// @v4 Force starts up automatically,
  //  which we don't want as there aren't any nodes yet.
  simulation.stop();

// Nice looking colors - no reason to buck the trend
  // @v4 scales now have a flattened naming scheme
  var fillColor = d3.scaleOrdinal()
    .domain(['BV','WB','Universal','Sony','Paramount','Fox','LGF','Independent'])  .range(['GoldenRod','SteelBlue','Orchid','#377eb8','Chartreuse','PowderBlue','LightSalmon','Yellow']);

var strokeColor = d3.scaleLinear()
  .domain([13,28,40,60,72,87])
 .range(['#ad1100','#ff220a',
         '#d49695',
         '#a1e1b7','#1ecc2c',
         '#1d8018']);

/*
   * This data manipulation function takes the raw data from
   * the CSV file and converts it into an array of node objects.
   * Each node will store data and visualization values to visualize
   * a bubble.
   *
   * rawData is expected to be an array of data objects, read in from
   * one of d3's loading functions like d3.csv.
   *
   * This function returns the new node array, with a node in that
   * array for each element in the rawData input.
   */
  function createNodes(rawData) {
    // Use the max total_amount in the data as the max in the scale's domain
    // note we have to ensure the total_amount is a number.
    var maxAmount = d3.max(rawData, function (d) { return +d.BO; });

// Sizes bubbles based on area.
    // @v4: new flattened scale names.
    var radiusScale = d3.scalePow()
      .exponent(0.5)
      .range([2, 85])
      .domain([0, maxAmount]);

// Use map() to convert raw data into node data.
    // Checkout https://learnjsdata.com/ for more on
    // working with data.
    var myNodes = rawData.map(function (d) {
      return {
        rank: d.Rank,
        radius: radiusScale(+d.BO),
        value: +d.BO,
        name: d.Title,
        org: d.Studio,
        group: d.Cat,
        open: d.Open,
        close: d.Close,
        score: d.RT,
        ow: d.Op,
        pct: ((d.Op/d.BO)*100).toFixed(1),
        x: Math.random() * 900,
        y: Math.random() * 800
      };
    });

// sort them to prevent occlusion of smaller nodes.
    myNodes.sort(function (a, b) { return b.value - a.value; });

return myNodes;
  }

/*
   * Main entry point to the bubble chart. This function is returned
   * by the parent closure. It prepares the rawData for visualization
   * and adds an svg element to the provided selector and starts the
   * visualization creation process.
   *
   * selector is expected to be a DOM element or CSS selector that
   * points to the parent element of the bubble chart. Inside this
   * element, the code will add the SVG continer for the visualization.
   *
   * rawData is expected to be an array of data objects as provided by
   * a d3 loading function like d3.csv.
   */
  var chart = function chart(selector, rawData) {
    // convert raw data into nodes data
    nodes = createNodes(rawData);

// Create a SVG element inside the provided selector
    // with desired size.
    svg = d3.select(selector)
      .append('svg')
      .attr('width', width)
      .attr('height', height);

// Bind nodes data to what will become DOM elements to represent them.
    bubbles = svg.selectAll('.bubble')
      .data(nodes, function (d) { return d.rank; });

// Create new circle elements each with class `bubble`.
    // There will be one circle.bubble for each object in the nodes array.
    // Initially, their radius (r attribute) will be 0.
    // @v4 Selections are immutable, so lets capture the
    //  enter selection to apply our transtition to below.
    var bubblesE = bubbles.enter().append('circle')
      .classed('bubble', true)
      .attr('r', 0)
      .attr('fill', function (d) { return fillColor(d.group); })
      .attr('stroke', function (d) { return strokeColor(d.score); })
      .attr('stroke-width', 2)
      .on('mouseover', showDetail)
      .on('mouseout', hideDetail);

// @v4 Merge the original empty selection and the enter selection
    bubbles = bubbles.merge(bubblesE);

// Fancy transition to make bubbles appear, ending with the
    // correct radius
    bubbles.transition()
      .duration(2000)
      .attr('r', function (d) { return d.radius; });

// Set the simulation's nodes to our newly created nodes array.
    // @v4 Once we set the nodes, the simulation will start running automatically!
    simulation.nodes(nodes);

// Set initial layout to single group.
    groupBubbles();
  };

/*
   * Callback function that is called after every tick of the
   * force simulation.
   * Here we do the acutal repositioning of the SVG circles
   * based on the current x and y values of their bound node data.
   * These x and y values are modified by the force simulation.
   */
  function ticked() {
    bubbles
      .attr('cx', function (d) { return d.x; })
      .attr('cy', function (d) { return d.y; });
  }

/*
   * Provides a x value for each node to be used with the split by year
   * x force.
   */
  function nodeYearPos(d) {
    return yearCenters[d.score].x;
  }

/*
   * Sets visualization in "single group mode".
   * The year labels are hidden and the force layout
   * tick function is set to move all nodes to the
   * center of the visualization.
   */
  function groupBubbles() {
    hideYearTitles();

// @v4 Reset the 'x' force to draw the bubbles to the center.
    simulation.force('x', d3.forceX().strength(forceStrength).x(center.x));

// @v4 We can reset the alpha value and restart the simulation
    simulation.alpha(1).restart();
  }

/*
   * Sets visualization in "split by year mode".
   * The year labels are shown and the force layout
   * tick function is set to move nodes to the
   * yearCenter of their data's year.
   */
  function splitBubbles() {
    showYearTitles();

// @v4 Reset the 'x' force to draw the bubbles to their year centers
    simulation.force('x', d3.forceX().strength(forceStrength).x(nodeYearPos));

// @v4 We can reset the alpha value and restart the simulation
    simulation.alpha(1).restart();
  }

/*
   * Hides Year title displays.
   */
  function hideYearTitles() {
    svg.selectAll('.year').remove();
  }

/*
   * Shows Year title displays.
   */
  function showYearTitles() {
    // Another way to do this would be to create
    // the year texts once and then just hide them.
    var yearsData = d3.keys(yearsTitleX);
    var years = svg.selectAll('.year')
      .data(yearsData);

years.enter().append('text')
      .attr('class', 'year')
      .attr('x', function (d) { return yearsTitleX[d]; })
      .attr('y', 40)
      .attr('text-anchor', 'middle')
      .text(function (d) { return d; });
  }

/*
   * Function called on mouseover to display the
   * details of a bubble in the tooltip.
   */
  function showDetail(d) {
    // change outline to indicate hover state.
    d3.select(this).attr('stroke', 'black');

var content = '<span class="name">Title: </span><span class="value">' +
                  d.name +
                  '</span><br/>' +
                  '<span class="name">Amount: </span><span class="value">$' +
                  addCommas(d.value) +
                  '</span><br/>' +
                  '<span class="name">Year: </span><span class="value">' +
                  d.year +
                  '</span>';

tooltip.showTooltip(content, d3.event);
  }

/*
   * Hides tooltip
   */
  function hideDetail(d) {
    // reset outline
    d3.select(this)
      .attr('stroke', d3.rgb(fillColor(d.group)).darker());

tooltip.hideTooltip();
  }

/*
   * Externally accessible function (this is attached to the
   * returned chart function). Allows the visualization to toggle
   * between "single group" and "split by year" modes.
   *
   * displayName is expected to be a string and either 'year' or 'all'.
   */
  chart.toggleDisplay = function (displayName) {
    if (displayName === 'year') {
      splitBubbles();
    } else {
      groupBubbles();
    }
  };

// return the chart function from closure.
  return chart;
}

/*
 * Below is the initialization code as well as some helper functions
 * to create a new bubble chart instance, load the data, and display it.
 */

var myBubbleChart = bubbleChart();

/*
 * Function called once data is loaded from CSV.
 * Calls bubble chart function to display inside #vis div.
 */
function display(error, data) {
  if (error) {
    console.log(error);
  }

myBubbleChart('#vis', data);
}

/*
 * Sets up the layout buttons to allow for toggling between view modes.
 */
function setupButtons() {
  d3.select('#toolbar')
    .selectAll('.button')
    .on('click', function () {
      // Remove active class from all buttons
      d3.selectAll('.button').classed('active', false);
      // Find the button just clicked
      var button = d3.select(this);

// Set it as the active button
      button.classed('active', true);

// Get the id of the button
      var buttonId = button.attr('id');

// Toggle the bubble chart based on
      // the currently clicked button.
      myBubbleChart.toggleDisplay(buttonId);
    });
}

/*
 * Helper function to convert a number into a string
 * and add commas to it to improve presentation.
 */
function addCommas(nStr) {
  nStr += '';
  var x = nStr.split('.');
  var x1 = x[0];
  var x2 = x.length > 1 ? '.' + x[1] : '';
  var rgx = /(\d+)(\d{3})/;
  while (rgx.test(x1)) {
    x1 = x1.replace(rgx, '$1' + ',' + '$2');
  }

return x1 + x2;
}

// Load the data.
d3.csv('bo2017c.csv', display);

// setup the buttons.
setupButtons();
function floatingTooltip(tooltipId, width) {
  // Local variable to hold tooltip div for
  // manipulation in other functions.
  var tt = d3.select('body')
    .append('div')
    .attr('class', 'tooltip')
    .attr('id', tooltipId)
    .style('pointer-events', 'none');

// Set a width if it is provided.
  if (width) {
    tt.style('width', width);
  }

// Initially it is hidden.
  hideTooltip();

/*
   * Display tooltip with provided content.
   *
   * content is expected to be HTML string.
   *
   * event is d3.event for positioning.
   */
  function showTooltip(content, event) {
    tt.style('opacity', 1.0)
      .html(content);

updatePosition(event);
  }

/*
   * Hide the tooltip div.
   */
  function hideTooltip() {
    tt.style('opacity', 0.0);
  }

/*
   * Figure out where to place the tooltip
   * based on d3 mouse event.
   */
  function updatePosition(event) {
    var xOffset = 20;
    var yOffset = 10;

var ttw = tt.style('width');
    var tth = tt.style('height');

var wscrY = window.scrollY;
    var wscrX = window.scrollX;

var curX = (document.all) ? event.clientX + wscrX : event.pageX;
    var curY = (document.all) ? event.clientY + wscrY : event.pageY;
    var ttleft = ((curX - wscrX + xOffset * 2 + ttw) > window.innerWidth) ?
                 curX - ttw - xOffset * 2 : curX + xOffset;

if (ttleft < wscrX + xOffset) {
      ttleft = wscrX + xOffset;
    }

var tttop = ((curY - wscrY + yOffset * 2 + tth) > window.innerHeight) ?
                curY - tth - yOffset * 2 : curY + yOffset;

if (tttop < wscrY + yOffset) {
      tttop = curY + yOffset;
    }

tt
      .style('top', tttop + 'px')
      .style('left', ttleft + 'px');
  }

return {
    showTooltip: showTooltip,
    hideTooltip: hideTooltip,
    updatePosition: updatePosition
  };
}
</script>

</html>

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