D3 Examples - TP_4

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script src="https://d3js.org/queue.v1.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
     .hidden {
        display: none;
    }
    
    div.tooltip {
        color: #222;
        background-color: #fff;
        padding: .5em;
        text-shadow: #f5f5f5 0 1px 0;
        border-radius: 2px;
        opacity: 0.9;
        position: absolute;
    }
    
  </style>
</head>
​
<body>
  
  <div>
    <input id="slider" type="range" value="1" min="1" max="52" step="1" />
    <span id="week">week</span>
    </div>
  
  <script>
        var width = 850,
          height = 580;
​
        var svg = d3.select( "body" )
                            .append( "svg" )
                .attr( "width", width )
                .attr( "height", height );
    
    var tooltip = d3.select('body')
                                    .append('div')
                                    .attr('class', 'hidden tooltip');
​
    var projection = d3.geoConicConformal()
                                         .center([2.454071, 46.279229])
                                         .scale(2800);
​
    var path = d3.geoPath()
                             .projection(projection);
​
    var color = d3.scaleQuantize()
                                .range(
                    [
                     "rgb(237,248,233)", 
                     "rgb(186,228,179)",
                     "rgb(116,196,118)", 
                     "rgb(49,163,84)", 
                     "rgb(0,109,44)"
                    ]);
    
        
    var grippeData, regionJson;
    
    queue().defer(d3.json, "france.json")
                 .defer(d3.csv, "GrippeFrance2014.csv")
                 .await(processData);
    
    
    function processData(error,_regionJson, _grippeData) {
        grippeData = _grippeData
      regionJson = _regionJson
      
      var min = -1, max = -1;
      d3.select('#week').html(Object.keys(grippeData[0])[1]);
      
      for (var i = 0; i < _grippeData.length; i++) {
        
        for (var j = 1; j < Object.values(_grippeData[i]).length; j++) {
          var vj = parseInt(Object.values(_grippeData[i])[j]);
         
          if ( vj > max){
            max = vj;
          }
​
          if (min == -1){
            min = vj;
          }     
          else if (min > vj){
            min = vj;
          }
        }
      }
      
      var numberofweeks = Object.values(_grippeData[0]).length-1;
      
     //définition de l'échelle de couleur
     color.domain([min,max]);
​
     //définition des valeurs disponibles sur le slider
     d3.select('#slider').attr("max", numberofweeks);
      
      d3.select("#slider").on("input", function() {
              updateViz(+this.value);
      });
​
      drawMap(regionJson, 1);
    }
    
    function updateViz(value) {
          var weeksArray = Object.keys(gdata[0]);
          d3.select('#week').html(weeksArray[value]);
          console.log(value)
          drawMap(regionJson, value);  
    }
    
    function drawMap(json, currentWeek) {
      carte = svg.selectAll("path")
                         .data(json.features);
      
      // code en cas de mise a jour de la carte / de changement de semaine
      carte.attr("class", "update")
             .style("fill", function(d) {
        
        var value = d.properties.value;
        if (value && value[currentWeek]) {
          return color(value[currentWeek]);
        } 
        else {
          // si pas de valeur alors en gris
          return "#ccc";
        }
      })
        .on('mousemove', function(d) {
        var mouse = d3.mouse(svg.node()).map(function(d) {
          return parseInt(d);
        });
        var value = d.properties.value;        
        tooltip.classed('hidden', false)
          .attr('style', 'left:' + (mouse[0] + 15) +
                'px; top:' + (mouse[1] - 35) + 'px')
          .html(d.properties.nom + "<br>" + d.properties.value[currentWeek]);
      })
        .on('mouseout', function() {
            tooltip.classed('hidden', true);
      });
​
      // code pour la creation de la carte quand les donnees sont chargees la 1e fois.
      carte.selectAll("path")
        .enter()
        .data(json.features)
        .append("path")
        .attr("d", path)
        .style("fill", function(d) {
          var value = d.properties.value;
          // on vérifie que la région et la valeur associée à la semaine existent
          if (value && value[currentWeek]) {  
            return color(value[currentWeek]);
          } else {
            // si pas de valeur alors coloration en gris
            return "#ccc";
          }
      })
        .on('mousemove', function(d) {
          var mouse = d3.mouse(svg.node()).map(function(d) {
            return parseInt(d);
          });
          tooltip.classed('hidden', false)
                     .attr('style', 'left:' + (mouse[0] + 15) +
                  'px; top:' + (mouse[1] - 35) + 'px')
                     .html(d.properties.nom + "<br>" + d.properties.value[currentWeek]);
      })
        .on('mouseout', function() {
        tooltip.classed('hidden', true);
      });
    }
​
  </script>
</body>
​
    