如何在地图上show/hide？

Question

到目前为止，我终于创建了一个地理地图，其中包含节点和连接它们的线。所有节点都有持有者 ID 和母公司。但是我想要一个功能，您可以在其中双击节点，它只会显示所选节点及其连接的节点。我不知道该怎么做，因为我不知道如何将我创建的线连接到节点。我在 JSFiddle 上重新创建了示例：http://jsfiddle.net/GarrettUK/x9058g8s/2/。如有任何问题，请随时提出，在此先感谢您！

holderID是公司，parentCompany是拥有所选节点的节点：

name: 'Tesco',
radius: 6,
fillKey: 'Negative',
holderID: 2,
parentCompany: 1,
balance: '2393',
date: '11/07/2005',
latitude: 48.632909,
longitude: 35.024414

Answer 1

您可以 select nodes 和 links 宽度 D3.js:

var bnodes = d3.selectAll('.datamaps-bubble');
var blinks = d3.selectAll('.datamaps-arc');

然后您可以计算额外的信息以在双击时更有效地执行 select 节点和链接的离子，例如：

blinks.each(function(dl, il) {
    bnodes.each(function(d,i) {
        if (dl.origin.latitude == d.latitude) {
            dl.origin.holderID = d.holderID;
        } else if (dl.destination.longitude == d.longitude) {
            dl.destination.holderID = d.holderID;
        }
    })
});

然后双击 event 仅显示链接的节点和链接：

bnodes.on('dblclick', function(d, i) {
    blinks.classed('hide', true);
    bnodes.classed('hide', true);

    connectedNodes = [d.holderID];

    blinks.filter(function(dl,il) {
        if (dl.origin.holderID == d.holderID) {
            connectedNodes.push(dl.destination.holderID);
            return true;
        } else if (dl.destination.holderID == d.holderID) {
            connectedNodes.push(dl.origin.holderID);
            return true;
        }
        return false;
    }).classed('hide', false);

    bnodes.filter(function(dd,ii) {
        return connectedNodes.indexOf(dd.holderID) > -1;
    }).classed('hide', false);
});

最后是 Fiddle：http://jsfiddle.net/x9058g8s/5/ 和片段：

//creating the map
var map = new Datamap({
    element: document.getElementById('map'),
    scope: 'world',
    geographyConfig: {
        popupOnHover: false,
        highlightOnHover: false
    },
    fills: {
        //node colour
        'Positive': '#007D1C',
        'Negative': '#A51000',
        //map colour
        defaultFill: '#9AAEBF',
    },
    arcConfig: {
        strokeColor: 'black',
        strokeWidth: 10,
        arcSharpness: 1,
        animationSpeed: 600
    },
});

var nodes = [{
    name: 'LRZ',
    radius: 6,
    fillKey: 'Positive',
    holderID: 1,
    parentCompany: 0,
    balance: '032393',
    date: '17/07/2015',
    latitude: 51.727028,
    longitude: -0.395508
},
{
    name: 'Tesco',
    radius: 6,
    fillKey: 'Negative',
    holderID: 2,
    parentCompany: 1,
    balance: '2393',
    date: '11/07/2005',
    latitude: 48.632909,
    longitude: 35.024414
},
{
    name: 'Apple',
    radius: 6,
    fillKey: 'Positive',
    holderID: 3,
    parentCompany: 1,
    balance: '0393',
    date: '01/03/2045',
    latitude: 37.244200,
    longitude: -115.815167
},
{
    name: 'BP',
    radius: 6,
    fillKey: 'Negative',
    holderID: 4,
    parentCompany: 1,
    balance: '032393',
    date: '17/07/2015',
    latitude: 62.955223,
    longitude: 109.555664
},
{
    name: 'Polycom',
    radius: 6,
    fillKey: 'Negative',
    holderID: 5,
    parentCompany: 2,
    balance: '032393',
    date: '17/07/2015',
    latitude: 62.955223,
    longitude: 109.555664
},
{
    name: 'Nike',
    radius: 6,
    fillKey: 'Negative',
    holderID: 6,
    parentCompany: 0,
    balance: '032393',
    date: '17/07/2015',
    latitude: -25.799891,
    longitude: 142.207031
},
{
    name: 'HTC',
    radius: 6,
    fillKey: 'Positive',
    holderID: 7,
    parentCompany: 3,
    balance: '032393',
    date: '17/07/2015',
    latitude: -3.513421,
    longitude: 24.082031
},
{
    name: 'Microsoft',
    radius: 6,
    fillKey: 'Positive',
    holderID: 8,
    parentCompany: 4,
    balance: '032393',
    date: '17/07/2015',
    latitude: -12.554564,
    longitude: -43.769531
},
{
    name: 'HP',
    radius: 6,
    fillKey: 'Negative',
    holderID: 9,
    parentCompany: 4,
    balance: '032393',
    date: '17/07/2015',
    latitude: 52.696361,
    longitude: -93.339844
},
{
    name: 'Poundland',
    radius: 6,
    fillKey: 'Negative',
    holderID: 10,
    parentCompany: 4,
    balance: '032393',
    date: '17/07/2015',
    latitude: 7.710992,
    longitude: -5.097656
},
{
    name: 'BBC',
    radius: 6,
    fillKey: 'Positive',
    holderID: 11,
    parentCompany: 6,
    balance: '032393',
    date: '17/07/2015',
    latitude: 71.187754,
    longitude: -36.035156
},
{
    name: 'Sony',
    radius: 6,
    fillKey: 'Negative',
    holderID: 12,
    parentCompany: 6,
    balance: '032393',
    date: '17/07/2015',
    latitude: 22.268764,
    longitude: 78.574219
},
{
    name: 'LG',
    radius: 6,
    fillKey: 'Positive',
    holderID: 13,
    parentCompany: 9,
    balance: '032393',
    date: '17/07/2015',
    latitude: 65.072130,
    longitude: 14.238281
}
];

var arcs = [
  //red lines
  {
    origin: {
      latitude: 48.632909,
      longitude: 35.024414
    },
    destination: {
      latitude: 51.727028,
      longitude: -0.395508
    },
  },
  {
    origin: {
      latitude: 37.244200,
      longitude: -115.815167
    },
    destination: {
      latitude: 51.727028,
      longitude: -0.395508
    },
  },
  {
    origin: {
      latitude: 62.955223,
      longitude: 109.555664
    },
    destination: {
      latitude: 51.727028,
      longitude: -0.395508
    },
  },
  {
    origin: {
      latitude: 48.632909,
      longitude: 35.024414
    },
    destination: {
      latitude: 62.955223,
      longitude: 109.555664
    },
  },
  {
    origin: {
      latitude: 37.244200,
      longitude: -115.815167
    },
    destination: {
      latitude: -3.513421,
      longitude: 24.082031
    },
  },
  {
    origin: {
      latitude: -12.554564,
      longitude: -43.769531
    },
    destination: {
      latitude: 62.955223,
      longitude: 109.555664
    },
  },
  {
    origin: {
      latitude: 52.696361,
      longitude: -93.339844
    },
    destination: {
      latitude: 62.955223,
      longitude: 109.555664
    },
  },
  {
    origin: {
      latitude: 7.710992,
      longitude: -5.097656
    },
    destination: {
      latitude: 62.955223,
      longitude: 109.555664
    },
  },
  {
    origin: {
      latitude: 71.187754,
      longitude: -36.035156
    },
    destination: {
      latitude: -25.799891,
      longitude: 142.207031
    },
  },
  {
    origin: {
      latitude: 22.268764,
      longitude: 78.574219
    },
    destination: {
      latitude: -25.799891,
      longitude: 142.207031
    },
  },
  {
    origin: {
      latitude: 65.072130,
      longitude: 14.238281
    },
    destination: {
      latitude: 52.696361,
      longitude: -93.339844
    },
  },
];
map.arc(arcs,  {strokeWidth: 1, arcSharpness: 1.4});

//draw bubbles for nodes
map.bubbles(nodes, {
    popupTemplate: function(geo, data) {
        return ['<div class="hoverinfo">' + 'Name: ' + data.name,
            '<br/>HolderID: ' + data.holderID,
            '<br/>Balance: ' + data.balance + '',
            '<br/>Date: ' + data.date + '',
            '</div>'
        ].join('');
    }
});

var bnodes = d3.selectAll('.datamaps-bubble');
var blinks = d3.selectAll('.datamaps-arc');
blinks.each(function(dl, il) {
    bnodes.each(function(d,i) {
        if (dl.origin.latitude == d.latitude) {
            dl.origin.holderID = d.holderID;
        } else if (dl.destination.longitude == d.longitude) {
            dl.destination.holderID = d.holderID;
        }
    })
});

bnodes.on('dblclick', function(d, i) {
    blinks.classed('hide', true);
    bnodes.classed('hide', true);
    
    connectedNodes = [d.holderID];
    
    blinks.filter(function(dl,il) {
        if (dl.origin.holderID == d.holderID) {
            connectedNodes.push(dl.destination.holderID);
            return true;
        } else if (dl.destination.holderID == d.holderID) {
            connectedNodes.push(dl.origin.holderID);
            return true;
        }
        return false;
    }).classed('hide', false);

    bnodes.filter(function(dd,ii) {
        return connectedNodes.indexOf(dd.holderID) > -1;
    }).classed('hide', false);
});

body {
  padding: 0px;
  margin: 0px;
  background-color: #C0D8ED;
}

div#map {
  position: relative;
  width: 99%;
  height: 200px;
  margin: auto;
  margin-top: -25%;
}

h1 {
  color: #193369;
  font-family: arial;
  font-size: 30px;
  text-align: center;
}

.hide {
    display: none;
}

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <title>Intercompany Map</title>
    <link rel="stylesheet" href="css/main.css" type="text/css" />
    <script src="http://d3js.org/d3.v3.min.js"></script>
    <script src="http://d3js.org/topojson.v1.min.js"></script>
    <script src="http://datamaps.github.io/scripts/datamaps.world.min.js"></script>
  </head>

  <body>
    <h1>My D3 Node Map</h1>
    <div id="map" style="height:800px"></div>
    <script src="js/icm.js"></script>
  </body>
</html>

如何在地图上show/hide？

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