block by micahstubbs f32a742947f259d12eb999d418a767fb

graph annotation - draggable clusters

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Made with d3.annotation. An example showing how you can dynamically update the annotations on tick with a network graph.

this iteration that makes the nodes underneath the annotation circles draggable too 🖱🎉

  svg.selectAll('.annotation-subject')
    .style('pointer-events', 'none');

an iteration on the block d3-annotation: Encircling Example from @DataToViz

now with support for touch events 🎉

d3.select('body')
  .on('touchstart', noZoom)
  .on('touchmove', noZoom)

function noZoom() {
  d3.event.preventDefault();
}

thanks to @autiomaa for pointing out that touch support was missing before 😄

further reading on Event.preventDefault() the at the MDN docs and the w3c spec

index.html

<!DOCTYPE html>
<html lang='en'>
<head>
    <meta charset='utf-8'>
    <link href='https://fonts.googleapis.com/css?family=Lato:300,900' rel='stylesheet' type='text/css'>

    <style>
    :root {
        --annotation-color: #E8336D;
    }

     body{
        background-color: whitesmoke;
     }

     svg {
        background-color: white;
        font-family: 'Lato';
     }

     line {
       stroke:#eae4e4;
     }

      .annotation path {
        stroke: var(--annotation-color);
        fill: rgba(0,0,0,0);
      }

      .annotation path.connector-arrow{
        fill: var(--annotation-color);
      }

      .annotation text {
        fill: var(--annotation-color);
      }

      .annotation-title {
        font-weight: bold;
      }

       circle.handle {
        stroke-dasharray: 5;
        stroke: var(--annotation-color);
        fill: rgba(255, 255, 255, .5);
        cursor: move;

        stroke-opacity: .4;
      }

      circle.handle.highlight {
        stroke-opacity: 1;
      }
        
       .annotation-note-bg {
          fill: rgba(255, 255, 255, 0);
        }

    </style>
</head>
<body>
    <svg width=960 height=500></svg>
    <script src='https://d3js.org/d3.v4.js'></script>
    <script src='https://rawgit.com/susielu/d3-annotation/master/d3-annotation.min.js'></script>
    <script src='vis.js'></script>
</body>
</html>

graph.json

{
  "nodes": [
    {"id": "Myriel", "group": 1},
    {"id": "Napoleon", "group": 1},
    {"id": "Mlle.Baptistine", "group": 1},
    {"id": "Mme.Magloire", "group": 1},
    {"id": "CountessdeLo", "group": 1},
    {"id": "Geborand", "group": 1},
    {"id": "Champtercier", "group": 1},
    {"id": "Cravatte", "group": 1},
    {"id": "Count", "group": 1},
    {"id": "OldMan", "group": 1},
    {"id": "Labarre", "group": 2},
    {"id": "Valjean", "group": 2},
    {"id": "Marguerite", "group": 3},
    {"id": "Mme.deR", "group": 2},
    {"id": "Isabeau", "group": 2},
    {"id": "Gervais", "group": 2},
    {"id": "Tholomyes", "group": 3},
    {"id": "Listolier", "group": 3},
    {"id": "Fameuil", "group": 3},
    {"id": "Blacheville", "group": 3},
    {"id": "Favourite", "group": 3},
    {"id": "Dahlia", "group": 3},
    {"id": "Zephine", "group": 3},
    {"id": "Fantine", "group": 3},
    {"id": "Mme.Thenardier", "group": 4},
    {"id": "Thenardier", "group": 4},
    {"id": "Cosette", "group": 5},
    {"id": "Javert", "group": 4},
    {"id": "Fauchelevent", "group": 0},
    {"id": "Bamatabois", "group": 2},
    {"id": "Perpetue", "group": 3},
    {"id": "Simplice", "group": 2},
    {"id": "Scaufflaire", "group": 2},
    {"id": "Woman1", "group": 2},
    {"id": "Judge", "group": 2},
    {"id": "Champmathieu", "group": 2},
    {"id": "Brevet", "group": 2},
    {"id": "Chenildieu", "group": 2},
    {"id": "Cochepaille", "group": 2},
    {"id": "Pontmercy", "group": 4},
    {"id": "Boulatruelle", "group": 6},
    {"id": "Eponine", "group": 4},
    {"id": "Anzelma", "group": 4},
    {"id": "Woman2", "group": 5},
    {"id": "MotherInnocent", "group": 0},
    {"id": "Gribier", "group": 0},
    {"id": "Jondrette", "group": 7},
    {"id": "Mme.Burgon", "group": 7},
    {"id": "Gavroche", "group": 8},
    {"id": "Gillenormand", "group": 5},
    {"id": "Magnon", "group": 5},
    {"id": "Mlle.Gillenormand", "group": 5},
    {"id": "Mme.Pontmercy", "group": 5},
    {"id": "Mlle.Vaubois", "group": 5},
    {"id": "Lt.Gillenormand", "group": 5},
    {"id": "Marius", "group": 8},
    {"id": "BaronessT", "group": 5},
    {"id": "Mabeuf", "group": 8},
    {"id": "Enjolras", "group": 8},
    {"id": "Combeferre", "group": 8},
    {"id": "Prouvaire", "group": 8},
    {"id": "Feuilly", "group": 8},
    {"id": "Courfeyrac", "group": 8},
    {"id": "Bahorel", "group": 8},
    {"id": "Bossuet", "group": 8},
    {"id": "Joly", "group": 8},
    {"id": "Grantaire", "group": 8},
    {"id": "MotherPlutarch", "group": 9},
    {"id": "Gueulemer", "group": 4},
    {"id": "Babet", "group": 4},
    {"id": "Claquesous", "group": 4},
    {"id": "Montparnasse", "group": 4},
    {"id": "Toussaint", "group": 5},
    {"id": "Child1", "group": 10},
    {"id": "Child2", "group": 10},
    {"id": "Brujon", "group": 4},
    {"id": "Mme.Hucheloup", "group": 8}
  ],
  "links": [
    {"source": "Napoleon", "target": "Myriel", "value": 1},
    {"source": "Mlle.Baptistine", "target": "Myriel", "value": 8},
    {"source": "Mme.Magloire", "target": "Myriel", "value": 10},
    {"source": "Mme.Magloire", "target": "Mlle.Baptistine", "value": 6},
    {"source": "CountessdeLo", "target": "Myriel", "value": 1},
    {"source": "Geborand", "target": "Myriel", "value": 1},
    {"source": "Champtercier", "target": "Myriel", "value": 1},
    {"source": "Cravatte", "target": "Myriel", "value": 1},
    {"source": "Count", "target": "Myriel", "value": 2},
    {"source": "OldMan", "target": "Myriel", "value": 1},
    {"source": "Valjean", "target": "Labarre", "value": 1},
    {"source": "Valjean", "target": "Mme.Magloire", "value": 3},
    {"source": "Valjean", "target": "Mlle.Baptistine", "value": 3},
    {"source": "Valjean", "target": "Myriel", "value": 5},
    {"source": "Marguerite", "target": "Valjean", "value": 1},
    {"source": "Mme.deR", "target": "Valjean", "value": 1},
    {"source": "Isabeau", "target": "Valjean", "value": 1},
    {"source": "Gervais", "target": "Valjean", "value": 1},
    {"source": "Listolier", "target": "Tholomyes", "value": 4},
    {"source": "Fameuil", "target": "Tholomyes", "value": 4},
    {"source": "Fameuil", "target": "Listolier", "value": 4},
    {"source": "Blacheville", "target": "Tholomyes", "value": 4},
    {"source": "Blacheville", "target": "Listolier", "value": 4},
    {"source": "Blacheville", "target": "Fameuil", "value": 4},
    {"source": "Favourite", "target": "Tholomyes", "value": 3},
    {"source": "Favourite", "target": "Listolier", "value": 3},
    {"source": "Favourite", "target": "Fameuil", "value": 3},
    {"source": "Favourite", "target": "Blacheville", "value": 4},
    {"source": "Dahlia", "target": "Tholomyes", "value": 3},
    {"source": "Dahlia", "target": "Listolier", "value": 3},
    {"source": "Dahlia", "target": "Fameuil", "value": 3},
    {"source": "Dahlia", "target": "Blacheville", "value": 3},
    {"source": "Dahlia", "target": "Favourite", "value": 5},
    {"source": "Zephine", "target": "Tholomyes", "value": 3},
    {"source": "Zephine", "target": "Listolier", "value": 3},
    {"source": "Zephine", "target": "Fameuil", "value": 3},
    {"source": "Zephine", "target": "Blacheville", "value": 3},
    {"source": "Zephine", "target": "Favourite", "value": 4},
    {"source": "Zephine", "target": "Dahlia", "value": 4},
    {"source": "Fantine", "target": "Tholomyes", "value": 3},
    {"source": "Fantine", "target": "Listolier", "value": 3},
    {"source": "Fantine", "target": "Fameuil", "value": 3},
    {"source": "Fantine", "target": "Blacheville", "value": 3},
    {"source": "Fantine", "target": "Favourite", "value": 4},
    {"source": "Fantine", "target": "Dahlia", "value": 4},
    {"source": "Fantine", "target": "Zephine", "value": 4},
    {"source": "Fantine", "target": "Marguerite", "value": 2},
    {"source": "Fantine", "target": "Valjean", "value": 9},
    {"source": "Mme.Thenardier", "target": "Fantine", "value": 2},
    {"source": "Mme.Thenardier", "target": "Valjean", "value": 7},
    {"source": "Thenardier", "target": "Mme.Thenardier", "value": 13},
    {"source": "Thenardier", "target": "Fantine", "value": 1},
    {"source": "Thenardier", "target": "Valjean", "value": 12},
    {"source": "Cosette", "target": "Mme.Thenardier", "value": 4},
    {"source": "Cosette", "target": "Valjean", "value": 31},
    {"source": "Cosette", "target": "Tholomyes", "value": 1},
    {"source": "Cosette", "target": "Thenardier", "value": 1},
    {"source": "Javert", "target": "Valjean", "value": 17},
    {"source": "Javert", "target": "Fantine", "value": 5},
    {"source": "Javert", "target": "Thenardier", "value": 5},
    {"source": "Javert", "target": "Mme.Thenardier", "value": 1},
    {"source": "Javert", "target": "Cosette", "value": 1},
    {"source": "Fauchelevent", "target": "Valjean", "value": 8},
    {"source": "Fauchelevent", "target": "Javert", "value": 1},
    {"source": "Bamatabois", "target": "Fantine", "value": 1},
    {"source": "Bamatabois", "target": "Javert", "value": 1},
    {"source": "Bamatabois", "target": "Valjean", "value": 2},
    {"source": "Perpetue", "target": "Fantine", "value": 1},
    {"source": "Simplice", "target": "Perpetue", "value": 2},
    {"source": "Simplice", "target": "Valjean", "value": 3},
    {"source": "Simplice", "target": "Fantine", "value": 2},
    {"source": "Simplice", "target": "Javert", "value": 1},
    {"source": "Scaufflaire", "target": "Valjean", "value": 1},
    {"source": "Woman1", "target": "Valjean", "value": 2},
    {"source": "Woman1", "target": "Javert", "value": 1},
    {"source": "Judge", "target": "Valjean", "value": 3},
    {"source": "Judge", "target": "Bamatabois", "value": 2},
    {"source": "Champmathieu", "target": "Valjean", "value": 3},
    {"source": "Champmathieu", "target": "Judge", "value": 3},
    {"source": "Champmathieu", "target": "Bamatabois", "value": 2},
    {"source": "Brevet", "target": "Judge", "value": 2},
    {"source": "Brevet", "target": "Champmathieu", "value": 2},
    {"source": "Brevet", "target": "Valjean", "value": 2},
    {"source": "Brevet", "target": "Bamatabois", "value": 1},
    {"source": "Chenildieu", "target": "Judge", "value": 2},
    {"source": "Chenildieu", "target": "Champmathieu", "value": 2},
    {"source": "Chenildieu", "target": "Brevet", "value": 2},
    {"source": "Chenildieu", "target": "Valjean", "value": 2},
    {"source": "Chenildieu", "target": "Bamatabois", "value": 1},
    {"source": "Cochepaille", "target": "Judge", "value": 2},
    {"source": "Cochepaille", "target": "Champmathieu", "value": 2},
    {"source": "Cochepaille", "target": "Brevet", "value": 2},
    {"source": "Cochepaille", "target": "Chenildieu", "value": 2},
    {"source": "Cochepaille", "target": "Valjean", "value": 2},
    {"source": "Cochepaille", "target": "Bamatabois", "value": 1},
    {"source": "Pontmercy", "target": "Thenardier", "value": 1},
    {"source": "Boulatruelle", "target": "Thenardier", "value": 1},
    {"source": "Eponine", "target": "Mme.Thenardier", "value": 2},
    {"source": "Eponine", "target": "Thenardier", "value": 3},
    {"source": "Anzelma", "target": "Eponine", "value": 2},
    {"source": "Anzelma", "target": "Thenardier", "value": 2},
    {"source": "Anzelma", "target": "Mme.Thenardier", "value": 1},
    {"source": "Woman2", "target": "Valjean", "value": 3},
    {"source": "Woman2", "target": "Cosette", "value": 1},
    {"source": "Woman2", "target": "Javert", "value": 1},
    {"source": "MotherInnocent", "target": "Fauchelevent", "value": 3},
    {"source": "MotherInnocent", "target": "Valjean", "value": 1},
    {"source": "Gribier", "target": "Fauchelevent", "value": 2},
    {"source": "Mme.Burgon", "target": "Jondrette", "value": 1},
    {"source": "Gavroche", "target": "Mme.Burgon", "value": 2},
    {"source": "Gavroche", "target": "Thenardier", "value": 1},
    {"source": "Gavroche", "target": "Javert", "value": 1},
    {"source": "Gavroche", "target": "Valjean", "value": 1},
    {"source": "Gillenormand", "target": "Cosette", "value": 3},
    {"source": "Gillenormand", "target": "Valjean", "value": 2},
    {"source": "Magnon", "target": "Gillenormand", "value": 1},
    {"source": "Magnon", "target": "Mme.Thenardier", "value": 1},
    {"source": "Mlle.Gillenormand", "target": "Gillenormand", "value": 9},
    {"source": "Mlle.Gillenormand", "target": "Cosette", "value": 2},
    {"source": "Mlle.Gillenormand", "target": "Valjean", "value": 2},
    {"source": "Mme.Pontmercy", "target": "Mlle.Gillenormand", "value": 1},
    {"source": "Mme.Pontmercy", "target": "Pontmercy", "value": 1},
    {"source": "Mlle.Vaubois", "target": "Mlle.Gillenormand", "value": 1},
    {"source": "Lt.Gillenormand", "target": "Mlle.Gillenormand", "value": 2},
    {"source": "Lt.Gillenormand", "target": "Gillenormand", "value": 1},
    {"source": "Lt.Gillenormand", "target": "Cosette", "value": 1},
    {"source": "Marius", "target": "Mlle.Gillenormand", "value": 6},
    {"source": "Marius", "target": "Gillenormand", "value": 12},
    {"source": "Marius", "target": "Pontmercy", "value": 1},
    {"source": "Marius", "target": "Lt.Gillenormand", "value": 1},
    {"source": "Marius", "target": "Cosette", "value": 21},
    {"source": "Marius", "target": "Valjean", "value": 19},
    {"source": "Marius", "target": "Tholomyes", "value": 1},
    {"source": "Marius", "target": "Thenardier", "value": 2},
    {"source": "Marius", "target": "Eponine", "value": 5},
    {"source": "Marius", "target": "Gavroche", "value": 4},
    {"source": "BaronessT", "target": "Gillenormand", "value": 1},
    {"source": "BaronessT", "target": "Marius", "value": 1},
    {"source": "Mabeuf", "target": "Marius", "value": 1},
    {"source": "Mabeuf", "target": "Eponine", "value": 1},
    {"source": "Mabeuf", "target": "Gavroche", "value": 1},
    {"source": "Enjolras", "target": "Marius", "value": 7},
    {"source": "Enjolras", "target": "Gavroche", "value": 7},
    {"source": "Enjolras", "target": "Javert", "value": 6},
    {"source": "Enjolras", "target": "Mabeuf", "value": 1},
    {"source": "Enjolras", "target": "Valjean", "value": 4},
    {"source": "Combeferre", "target": "Enjolras", "value": 15},
    {"source": "Combeferre", "target": "Marius", "value": 5},
    {"source": "Combeferre", "target": "Gavroche", "value": 6},
    {"source": "Combeferre", "target": "Mabeuf", "value": 2},
    {"source": "Prouvaire", "target": "Gavroche", "value": 1},
    {"source": "Prouvaire", "target": "Enjolras", "value": 4},
    {"source": "Prouvaire", "target": "Combeferre", "value": 2},
    {"source": "Feuilly", "target": "Gavroche", "value": 2},
    {"source": "Feuilly", "target": "Enjolras", "value": 6},
    {"source": "Feuilly", "target": "Prouvaire", "value": 2},
    {"source": "Feuilly", "target": "Combeferre", "value": 5},
    {"source": "Feuilly", "target": "Mabeuf", "value": 1},
    {"source": "Feuilly", "target": "Marius", "value": 1},
    {"source": "Courfeyrac", "target": "Marius", "value": 9},
    {"source": "Courfeyrac", "target": "Enjolras", "value": 17},
    {"source": "Courfeyrac", "target": "Combeferre", "value": 13},
    {"source": "Courfeyrac", "target": "Gavroche", "value": 7},
    {"source": "Courfeyrac", "target": "Mabeuf", "value": 2},
    {"source": "Courfeyrac", "target": "Eponine", "value": 1},
    {"source": "Courfeyrac", "target": "Feuilly", "value": 6},
    {"source": "Courfeyrac", "target": "Prouvaire", "value": 3},
    {"source": "Bahorel", "target": "Combeferre", "value": 5},
    {"source": "Bahorel", "target": "Gavroche", "value": 5},
    {"source": "Bahorel", "target": "Courfeyrac", "value": 6},
    {"source": "Bahorel", "target": "Mabeuf", "value": 2},
    {"source": "Bahorel", "target": "Enjolras", "value": 4},
    {"source": "Bahorel", "target": "Feuilly", "value": 3},
    {"source": "Bahorel", "target": "Prouvaire", "value": 2},
    {"source": "Bahorel", "target": "Marius", "value": 1},
    {"source": "Bossuet", "target": "Marius", "value": 5},
    {"source": "Bossuet", "target": "Courfeyrac", "value": 12},
    {"source": "Bossuet", "target": "Gavroche", "value": 5},
    {"source": "Bossuet", "target": "Bahorel", "value": 4},
    {"source": "Bossuet", "target": "Enjolras", "value": 10},
    {"source": "Bossuet", "target": "Feuilly", "value": 6},
    {"source": "Bossuet", "target": "Prouvaire", "value": 2},
    {"source": "Bossuet", "target": "Combeferre", "value": 9},
    {"source": "Bossuet", "target": "Mabeuf", "value": 1},
    {"source": "Bossuet", "target": "Valjean", "value": 1},
    {"source": "Joly", "target": "Bahorel", "value": 5},
    {"source": "Joly", "target": "Bossuet", "value": 7},
    {"source": "Joly", "target": "Gavroche", "value": 3},
    {"source": "Joly", "target": "Courfeyrac", "value": 5},
    {"source": "Joly", "target": "Enjolras", "value": 5},
    {"source": "Joly", "target": "Feuilly", "value": 5},
    {"source": "Joly", "target": "Prouvaire", "value": 2},
    {"source": "Joly", "target": "Combeferre", "value": 5},
    {"source": "Joly", "target": "Mabeuf", "value": 1},
    {"source": "Joly", "target": "Marius", "value": 2},
    {"source": "Grantaire", "target": "Bossuet", "value": 3},
    {"source": "Grantaire", "target": "Enjolras", "value": 3},
    {"source": "Grantaire", "target": "Combeferre", "value": 1},
    {"source": "Grantaire", "target": "Courfeyrac", "value": 2},
    {"source": "Grantaire", "target": "Joly", "value": 2},
    {"source": "Grantaire", "target": "Gavroche", "value": 1},
    {"source": "Grantaire", "target": "Bahorel", "value": 1},
    {"source": "Grantaire", "target": "Feuilly", "value": 1},
    {"source": "Grantaire", "target": "Prouvaire", "value": 1},
    {"source": "MotherPlutarch", "target": "Mabeuf", "value": 3},
    {"source": "Gueulemer", "target": "Thenardier", "value": 5},
    {"source": "Gueulemer", "target": "Valjean", "value": 1},
    {"source": "Gueulemer", "target": "Mme.Thenardier", "value": 1},
    {"source": "Gueulemer", "target": "Javert", "value": 1},
    {"source": "Gueulemer", "target": "Gavroche", "value": 1},
    {"source": "Gueulemer", "target": "Eponine", "value": 1},
    {"source": "Babet", "target": "Thenardier", "value": 6},
    {"source": "Babet", "target": "Gueulemer", "value": 6},
    {"source": "Babet", "target": "Valjean", "value": 1},
    {"source": "Babet", "target": "Mme.Thenardier", "value": 1},
    {"source": "Babet", "target": "Javert", "value": 2},
    {"source": "Babet", "target": "Gavroche", "value": 1},
    {"source": "Babet", "target": "Eponine", "value": 1},
    {"source": "Claquesous", "target": "Thenardier", "value": 4},
    {"source": "Claquesous", "target": "Babet", "value": 4},
    {"source": "Claquesous", "target": "Gueulemer", "value": 4},
    {"source": "Claquesous", "target": "Valjean", "value": 1},
    {"source": "Claquesous", "target": "Mme.Thenardier", "value": 1},
    {"source": "Claquesous", "target": "Javert", "value": 1},
    {"source": "Claquesous", "target": "Eponine", "value": 1},
    {"source": "Claquesous", "target": "Enjolras", "value": 1},
    {"source": "Montparnasse", "target": "Javert", "value": 1},
    {"source": "Montparnasse", "target": "Babet", "value": 2},
    {"source": "Montparnasse", "target": "Gueulemer", "value": 2},
    {"source": "Montparnasse", "target": "Claquesous", "value": 2},
    {"source": "Montparnasse", "target": "Valjean", "value": 1},
    {"source": "Montparnasse", "target": "Gavroche", "value": 1},
    {"source": "Montparnasse", "target": "Eponine", "value": 1},
    {"source": "Montparnasse", "target": "Thenardier", "value": 1},
    {"source": "Toussaint", "target": "Cosette", "value": 2},
    {"source": "Toussaint", "target": "Javert", "value": 1},
    {"source": "Toussaint", "target": "Valjean", "value": 1},
    {"source": "Child1", "target": "Gavroche", "value": 2},
    {"source": "Child2", "target": "Gavroche", "value": 2},
    {"source": "Child2", "target": "Child1", "value": 3},
    {"source": "Brujon", "target": "Babet", "value": 3},
    {"source": "Brujon", "target": "Gueulemer", "value": 3},
    {"source": "Brujon", "target": "Thenardier", "value": 3},
    {"source": "Brujon", "target": "Gavroche", "value": 1},
    {"source": "Brujon", "target": "Eponine", "value": 1},
    {"source": "Brujon", "target": "Claquesous", "value": 1},
    {"source": "Brujon", "target": "Montparnasse", "value": 1},
    {"source": "Mme.Hucheloup", "target": "Bossuet", "value": 1},
    {"source": "Mme.Hucheloup", "target": "Joly", "value": 1},
    {"source": "Mme.Hucheloup", "target": "Grantaire", "value": 1},
    {"source": "Mme.Hucheloup", "target": "Bahorel", "value": 1},
    {"source": "Mme.Hucheloup", "target": "Courfeyrac", "value": 1},
    {"source": "Mme.Hucheloup", "target": "Gavroche", "value": 1},
    {"source": "Mme.Hucheloup", "target": "Enjolras", "value": 1}
  ]
}

vis.js

/* global d3 window makeAnnotations */

// Network code from: Mike Bostock's example https://bl.ocks.org/mbostock/4062045
const svg = d3.select('svg');
const width = +svg.attr('width');
const height = +svg.attr('height');

const color = {
  3: '#e4b0b0',
  1: '#E8336D',
  8: '#00897b',
};

const circlePadding = 20;

const simulation = d3.forceSimulation()
  .force('link', d3.forceLink().id(d => d.id))
  .force('charge', d3.forceManyBody())
  .force('center', d3.forceCenter(width / 2, height / 2));

d3.json('graph.json', (error, graph) => {
  if (error) throw error;
  const link = svg.append('g')
    .attr('class', 'links')
    .selectAll('line')
    .data(graph.links)
    .enter().append('line')
      .attr('stroke-width', d => Math.sqrt(d.value));

  const node = svg.append('g')
    .attr('class', 'nodes')
    .selectAll('circle')
    .data(graph.nodes)
    .enter().append('circle')
    .attr('r', 5)
    .attr('fill', d => color[`${d.group}`] || 'lightgrey')
    .call(d3.drag()
      .on('start', dragstarted)
      .on('drag', dragged)
      .on('end', dragended)
    );

  node.append('title')
    .text(d => d.id);

  d3.select('body')
    .on('touchstart', noZoom)
    .on('touchmove', noZoom)

  simulation
    .nodes(graph.nodes)
    .on('tick', ticked);

  simulation.force('link')
    .links(graph.links);

  function ticked() {
    link
      .attr('x1', d => d.source.x)
      .attr('y1', d => d.source.y)
      .attr('x2', d => d.target.x)
      .attr('y2', d => d.target.y);
    node
      .attr('cx', d => d.x)
      .attr('cy', d => d.y);

    makeAnnotations.annotations()
    .forEach((d, i) => {
      points = graph.nodes
        .filter(d => d.group === groups[i])
        .map(d => ({
          x: d.x,
          y: d.y,
          r: 5
        }));
      circle = d3.packEnclose(points);
      d.position = { 
        x: circle.x, 
        y: circle.y
      };
      d.subject.radius = circle.r + circlePadding;
    });
    makeAnnotations.update();
  }

  let groups = [3, 1, 8];
  let points = groups.map(p => graph.nodes
  .filter(d => d.group === p)
  .map(d => ({
    x: d.x,
    y: d.y,
    r: 5
  })));

  let circle = points.map(p => d3.packEnclose(p));
  const annotations = [{
    note: { 
      label: 'Group 3',
      title: 'Les Mis'
    },
    dy: 93,
    dx: -176,
    x: circle[0].x,
    y: circle[0].y,
    type: d3.annotationCalloutCircle,
    subject: {
      radius: circle[0].r + circlePadding,
      radiusPadding: 10,
    },
  },
  {
    note: { 
      label: 'Group 1',
      title: 'Les Mis'
    },
    dy: 93,
    dx: -176,
    x: circle[1].x,
    y: circle[1].y,
    type: d3.annotationCalloutCircle,
    subject: {
      radius: circle[1].r + 20,
      radiusPadding: 10,
    },
  },
  {
    note: { 
      label: 'Group 8',
      title: 'Les Mis'
    },
    dy: 93,
    dx: 176,
    x: circle[2].x,
    y: circle[2].y,
    type: d3.annotationCalloutCircle,
    subject: {
      radius: circle[2].r + 20,
      radiusPadding: 10,
    },
  },
  ];

  window.makeAnnotations = d3.annotation()
    .annotations(annotations)
    .accessors({ x: d => d.x, y: d => d.y });

  svg.append('g')
    .attr('class', 'annotation-encircle')
    .call(makeAnnotations);

  svg.selectAll('.annotation-subject')
    .style('pointer-events', 'none');
});

function dragstarted(d) {
  if (!d3.event.active) simulation.alphaTarget(0.3).restart();
  d.fx = d.x;
  d.fy = d.y;
}
function dragged(d) {
  d.fx = d3.event.x;
  d.fy = d3.event.y;
}
function dragended(d) {
  if (!d3.event.active) simulation.alphaTarget(0);
  d.fx = null;
  d.fy = null;
}

function noZoom() {
  d3.event.preventDefault();
}