D3 Examples

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v3.min.js"></script>
  <script src="https://d3js.org/d3-queue.v3.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    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="100" step="1" />
    <span id="week">week</span>
    </div>
  <script>
        var width = 700,
          height = 580;
​
        var svg = d3.select( "body" )
        .append( "svg" )
          .attr( "width", width )
          .attr( "height", height );
​
        
    var projection =  d3.geo.conicConformal().center([2.454071, 46.279229]).scale(3000);
    
    var path = d3.geo.path()
                 .projection(projection);
    /*tooltip*/
     var tooltip = d3.select('body').append('div')
            .attr('class', 'hidden tooltip');
    
    var color = d3.scale.quantize()
   .range(["rgb(237,248,233)", "rgb(186,228,179)",
   "rgb(116,196,118)", "rgb(49,163,84)", "rgb(0,109,44)"]);
  /*load data*/    
  d3.queue()
  .defer(d3.json, "regions.geojson.txt")
  .defer(d3.csv, "GrippeFrance2014.csv")
  .await(processData); 
    
  function processData(error,francejson,grippedata) {
     weeklist = Object.keys(grippedata[0]);
    var number_of_weeks = weeklist.length - 2; 
    //slider min max
    d3.select('#slider').attr("max", number_of_weeks );
    d3.select('#slider').attr("min", 1 );
   
    //grippe values
    var grippe_values = [];
    for (var i = 0; i < grippedata.length; i++) {
           //Nom de l'etat
          var dataState = grippedata[i].region;
            
      //Valeur associee a l'etat
      var dataValue = Object.values(grippedata[i]);
      grippe_values = grippe_values.concat(dataValue.slice(1,number_of_weeks-1).map(function(i){return parseFloat(i);}));
           //Recherche de l'etat dans le GeoJSON
           for (var j = 0; j < francejson.features.length; j++) {
               var jsonState = francejson.features[j].properties.nom;
               if (dataState == jsonState) {
               //On injecte la valeur de l'Etat dans le json
               francejson.features[j].properties.value = dataValue;               
               break;
                }
                     }
            }
       //grippe min max
    var grippe_min = d3.min(grippe_values);
    var grippe_max = d3.max(grippe_values);
        //color domain
    var step = (grippe_max - grippe_min)/4;
     color_levels = [grippe_min,grippe_min+step,grippe_min+2*step,grippe_min+3*step, grippe_max];
    color.domain([grippe_min, grippe_max]);
    //draw map
     franceGrippe = francejson;
   drawMap(franceGrippe,1);
   drawLegend(color_levels);
  }
  
  function drawMap(json,currentWeek)
  {
    carte = svg.selectAll("path")
    .data(json.features);
​
    // en cas de mise a jour de la carte / de changement de semaine
  carte.attr("class", "update")
         .style("fill", function(d) {
    if(d.properties.value)
    {
      var value = parseFloat(d.properties.value[currentWeek]);  
             
      if (value) {
         return color(value);
      } else {
         // si pas de valeur alors en gris
         return "#ccc";
        }
    }else
    {
        return "#ccc";    
    }   
    });
​
  // code pour la creation de la carte la 1e fois.
  carte.enter()
        .append("path")
        .attr("class", "enter")
            .attr("d", path)
      .style("fill", function(d) {
           if(d.properties.value)
          {
            var value = parseFloat(d.properties.value[currentWeek]);  
​
            if (value) {
               return color(value);
            } else {
               // si pas de valeur alors en gris
               return "#ccc";
              }
          }else
          {
            return "#ccc";    
          }
      })
       .on('mousemove', function(d) {
                    var mouse = d3.mouse(svg.node()).map(function(d) {
                        return parseInt(d);
                    });
                                    if(d.properties.value)
                    {
                      var slider_value = d3.select("#slider").property("value");
                      tooltip.classed('hidden', false)
                          .attr('style', 'left:' + (mouse[0] + 15) +
                                  'px; top:' + (mouse[1] - 35) + 'px')
                          .html(d.properties.nom + ":" + d.properties.value[slider_value]);
                    }
                })
       .on('mouseout', function(d) {
                    tooltip.classed('hidden', true);
        });
  }
    
            function updateViz(slider_value){
        d3.select('#week').html(weeklist[slider_value]);
        drawMap(franceGrippe,slider_value); 
            }
      d3.select("#slider").on("input", function() {
         updateViz(+this.value);
      });
    function drawLegend(color_levels)
  {
  // draw legend
  var legend = svg.selectAll(".legend")
      .data(color_levels)
        .enter()
        .append("g")
      .attr("class", "legend")
      .attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
​
  // draw legend colored rectangles
  legend.append("rect")
      .attr("x", width - 18)
      .attr("width", 18)
      .attr("height", 18)
      .style("fill", color);
​
  // draw legend text
  legend.append("text")
      .attr("x", width - 24)
      .attr("y", 9)
      .attr("dy", ".35em")
      .style("text-anchor", "end")
      .text(function(d) { return d;});
  }
  </script>
</body>
​
    