Linked strict Beeswarm

This block is a remake of HarryStevens's block: Linked Beeswarm, where the position of circle strictly encode dates, because I'm always confused when a beeswarm does not the job it was dedicated for.

To fix the y-coordinate for a strict encoding of the data-based value (here, the date), 1 line of code is required (before starting the force-based simulation):

data.forEach(function(d){ d.fy = y(d.book_year); });

Another option would have been to use the d3_beeswarm plugin, which computes the final arrangement thanks to a one-pass algorithm, which is much more faster than using a force-based simultation.

==ORIGINAL README==

This is the code for the "linked beeswarm" chart I made for a story on the history of Hercule Poirot.

I added a checkbox to let you see the Voronoi diagram, which optimizes the size of the mouseover / tap area of each circle.

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
      
    <style>
      body {
        margin: 0;
        font-family: "Helvetica Neue", sans-serif;
      }
      .cell path {
        fill: none;
        pointer-events: all;
      }
      .cell.selected circle {
        stroke: #000;
        stroke-width: 2px;
      }
      #linked-beeswarm {
        max-width: 600px;
        width: 100%;
        margin: auto;
      }
      .intro {
        max-width: 600px;
        width: 100%;
        margin: auto;
        font-size: .9em;
        margin-bottom: 20px;
      }
      #linked-beeswarm .axis .domain {
        display: none;
      }
      #linked-beeswarm .axis .tick line {
        stroke: #ccc;
        stroke-dasharray: 5, 5;
      }
      #linked-beeswarm .axis .tick text {
        fill: #888;
      }
      #linked-beeswarm .time-label {
        font-size: .8em;
        font-weight: bold;
        fill: #888;
      }
      #linked-beeswarm .top-label {
        font-weight: bold;
        text-anchor: middle;
      }
      .count-label {
        text-anchor: middle;
        font-size: .8em;
      }
      .tip-line {
        stroke: #000;
        stroke-width: 1.5px;
        fill: none;
      }
      .tip {
        position: absolute;
        top: 0;
        left: 0;
        text-align: center;
        pointer-events: none;
        text-shadow: -1px -1px 1px #ffffff, -1px 0px 1px #ffffff, -1px 1px 1px #ffffff, 0px -1px 1px #ffffff, 0px 1px 1px #ffffff, 1px -1px 1px #ffffff, 1px 0px 1px #ffffff, 1px 1px 1px #ffffff;
      }
      .tip .kill {
        font-size: .8em;
      }
      .tip .book-name {
        font-weight: bold;
        font-size: .9em;
        background: rgba(255, 255, 255, .8);
        margin-bottom: 10px;
      }
      .tip .type {
        font-size: .8em;
      }

.show {
      	position: absolute;
      	font-size: .8em;
      }
      /*THE POINT AT WHICH THE TABLE IS TOO WIDE*/
      @media only screen and (max-width: 600px) {
        html, body {
          max-width: 100%;
          overflow-x: hidden;
        }
        .intro {
          padding: 0px 20px;
          width: auto;
        }
      }
    </style>
  </head>
  <body>
  	<div class="show">Show voronoi <input type="checkbox"></div>
    <div class="intro">Each <b>circle</b> represents a murderer or a victim. Earlier stories are on <b>top</b>; later ones are on <b>bottom</b>. <b><span class="hover-tap">Hover or tap</span></b> on a circle for more information.</div>
    <div id="linked-beeswarm"></div>
    <svg height="0">
      <marker id="markerArrow" markerWidth="13" markerHeight="13" refX="2" refY="6" orient="auto">
        <path d="M2,2 L2,11 L10,6 L2,2" style="fill: #000000;" />
      </marker>
    </svg>
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <script src="https://unpkg.com/d3-marcon@2.0.2/build/d3-marcon.min.js"></script>
    <script src="https://unpkg.com/jeezy@1.12.10/lib/jeezy.min.js"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <script src="https://www.hindustantimes.com/static/common/js/jquery.smartresize.js"></script>
    <script>
      var w = $(window).width();
      $(document).ready(function(){
        draw();
      });
      $(window).smartresize(function(){
        // only on width change
        if ($(window).width() != w){
          draw();
          w = $(window).width()
        }
      });
      function draw(){
        var first_draw = true;
        $("#linked-beeswarm").empty();
        $(".tip").remove();

// magic numbers
        var ww = $(window).width();
        var bp = 510;

// setup tip
        var tip = d3.select("#linked-beeswarm").append("div")
          .attr("class", "tip");

tip.append("div").attr("class", "book-name");
        tip.append("div").attr("class", "type murderer");
        tip.append("div").attr("class", "kill");
        tip.append("div").attr("class", "type victim");

var x = d3.scaleBand()
          .rangeRound([0, width]);

var y = d3.scaleLinear()
          .rangeRound([0, height]);

var size = ww < bp ? 4 : 5;

d3.csv("data.csv", function(err, data){

// data types
          data.forEach(function(d){
            d.book_year = +d.book_year;
            return d;
          });

var genders = jz.arr.uniqueBy(data, "gender");
          var types = jz.arr.uniqueBy(data, "type");

function filter_facet(type, gender){
              return this_data.filter(function(d){ return d.type == type && d.gender == gender; })[0].count;
            }

return {
              book: book,
              murderer_man: filter_facet("murderer", "man"),
              murderer_woman: filter_facet("murderer", "woman"),
              victim_man: filter_facet("victim", "man"),
              victim_woman: filter_facet("victim", "woman"),
            }
          });

// domains
          x.domain(types);
          y.domain(d3.extent(data, function(d){ return d.book_year; }));

// time label
          svg.append("text")
              .attr("class", "time-label")
              .attr("x", ww < bp ? -margin.left + 4 : -margin.left)
              .attr("y", 0)
              .attr("dy", -10)
              .text("Time ↓");

// top labels
          var top_label = svg.selectAll(".top-label")
              .data(types)
            .enter().append("text")
              .attr("class", "top-label")
              .attr("x", function(d){ return x(d) + (x.bandwidth() / 2); })
              .attr("y", -margin.top)
              .attr("dy", 12)
              .text(function(d){ return jz.str.toStartCase(d) + "s"; });

// 250 ticks
          for (var i = 0; i < 250; ++i) simulation.tick();

// for loop for axes because you can't send different functions into .call()
          types.forEach(function(type){
            var axis = type == "murderer" ? d3.axisLeft(y) : d3.axisRight(y);
            axis
              .tickFormat(function(d){ return +d; })
              .tickSizeOuter(0)
              .tickSizeInner(type == "murderer" ? -width :  0);

svg.append("g")
                .attr("class", "axis")
                .attr("transform", "translate(" + (type == "murderer" ? 0 : width) + ", 0)")
                .call(axis);
          });

// JOIN
          var cell = svg.append("g")
              .attr("class", "cells")
              .selectAll("g").data(d3.voronoi()
                .extent([[0, 0], [width, height]])
                .x(function(d) { return d.x; })
                .y(function(d) { return d.y; })
                .polygons(data))
              .enter().append("g")
                .attr("class", function(d){ return "cell " + d.data.type + " " + jz.str.toSlugCase(d.data.name) + " " +jz.str.toSlugCase(d.data.book); });
          
          // voronoi
          var voronoi = cell.append("path")
              .attr("d", function(d) { return d == undefined ? null : "M" + d.join("L") + "Z"; });

// circle
          cell.append("circle")
            .attr("r", size)
            .style("fill", function(d){ return color_names[d.data.gender]; })
            .attr("cx", function(d) { return d == undefined ? null : d.data.x; })
            .attr("cy", function(d) { return d == undefined ? null :  d.data.y; });

svg.selectAll(".cell")
            .on("mouseover", tipon);

function tipon(d){
            d3.selectAll(".cell")
              .classed("selected", false);

d3.selectAll(".cell." + jz.str.toSlugCase(d.data.book))
              .classed("selected", true);

var book_lookup = books_data.filter(function(book_obj){
              return book_obj.book == d.data.book;
            })[0];

// content in the tip
            d3.select(".tip .book-name").html(d.data.book + " (" + d.data.book_year + ")");
            d3.select(".tip .type.murderer").html(makeHTML("murderer"));
            d3.select(".tip .kill").html(d3.sum([book_lookup.murderer_man, book_lookup.murderer_woman]) == 1 ? "kills" : "kill")
            d3.select(".tip .type.victim").html(makeHTML("victim"));

function makeHTML(type){
              var man_html = makeGenderHTML(type, "man");
              var woman_html = makeGenderHTML(type, "woman");
              return book_lookup[type + "_man"] > 0 && book_lookup[type + "_woman"] > 0 ? man_html + " &amp; " + woman_html :
                book_lookup[type + "_man"] > 0 ? man_html :
                woman_html;
            }
            function makeGenderHTML(type, gender){
              return "<span style='color: " + color_names[gender] + "'>" + book_lookup[type + "_" + gender] + " " + (book_lookup[type + "_" + gender] == 1 ? gender : gender.replace("a", "e")) + "</span>";
            }

var tip_pos = d3.select(".tip").node().getBoundingClientRect();
            var window_padding = 40;
            var y_pos = y(d.data.book_year);
            var svg_offset = $("#linked-beeswarm svg").position();

var top = y_pos - (ww < bp ? tip_pos.height * .8 : tip_pos.height * 1.2) + svg_offset.top;
            top = top < svg_offset.top ? svg_offset.top : top;
            if (!first_draw){
              top = top < $(window).scrollTop() + window_padding ? $(window).scrollTop() + window_padding : top;
            } else {
              first_draw = false;
            }

d3.select(".tip")
              .style("left", (ww / 2) - (tip_pos.width / 2) + "px")
              .style("top", top + "px");

var line = svg.selectAll(".tip-line")
                .data(lines_data, function(d){ return d.name; })

line.exit().remove();

var already_drew_murderer = false;

line.enter().append("path")
              .attr("class", "tip-line")
              .attr("d", function(d){ 
                var dx = d.points[1].x - d.points[0].x,
                  dy = d.points[1].y - d.points[0].y,
                  dr = Math.sqrt(dx * dx + dy * dy);
                return "M" + d.points[0].x + "," + d.points[0].y + "A" + dr + "," + dr + " 0 0,1 " + d.points[1].x + "," + d.points[1].y;
                
              })
              .attr("marker-end", function(d){ 
                if (d.type == "murderer" && !already_drew_murderer){
                  already_drew_murderer = true;
                  return "url(#markerArrow)";  
                } else if (d.type !== "murderer") {
                  return "url(#markerArrow)";  
                } else {
                  return "";
                }
              });

function calcx1(d){
              var relativePos = calcRelPos("#linked-beeswarm", ".cell." + jz.str.toSlugCase(d.name) + " circle");
              return relativePos.left - margin.left + (d.type == "murderer" ? size * 2 : 0);
            }
            function calcx2(d){
              return (d.type == "murderer" ? -50 : 50) + width / 2;
            }

function calcRelPos(parent, child){
              var parentPos = d3.select(parent).node().getBoundingClientRect(),
                childrenPos = d3.select(child).node().getBoundingClientRect(),
                relativePos = {};

relativePos.top = childrenPos.top - parentPos.top,
              relativePos.right = childrenPos.right - parentPos.right,
              relativePos.bottom = childrenPos.bottom - parentPos.bottom,
              relativePos.left = childrenPos.left - parentPos.left;
              return relativePos;
            }
        
          }

var starter = data.filter(function(d){ return d.book == "The Clocks"; })[0];
          d3.timeout(function(){ tipon({data: starter})}, 2000);

});
      }

$(".show input").change(function(){
      	$(".cell path").css("stroke", $(this).prop("checked") ? "#000" : "none");
    	});
    </script>
  </body>
</html>

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

https://unpkg.com/d3-marcon@2.0.2/build/d3-marcon.min.js

https://unpkg.com/jeezy@1.12.10/lib/jeezy.min.js

https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js

https://www.hindustantimes.com/static/common/js/jquery.smartresize.js