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<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.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(2500);
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)"
]);
d3.csv("GrippeFrance2014.csv", function(data) {
color.domain([0, 200]);
var weeksArray = Object.keys(data[0]);
var franceJson
d3.json("france.json", function(json) {
//On fusionne les donnees avec le GeoJSON
for (var i = 0; i < data.length; i++) {
for (var j = 0; j < json.features.length; j++) {
var jsonRegion = json.features[j].properties.nom;
if (data[i].region == jsonRegion) {
//json.features[j].properties.value = dataValue;
json.features[j].properties.values = Object.values(data[i]);
break;
}
}
}
franceJson = json
d3.select('#week').html(Object.keys(data[0])[1]);
d3.select("#slider").on("input", function() {
updateViz(+this.value);
});
svg.selectAll("path")
.data(json.features)
.enter()
.append("path")
.attr("d", path);
drawMap(1)
});
function updateViz(value) {
console.log("update " + "value");
d3.select('#week').html(weeksArray[value]);
drawMap(value);
}
function drawMap(currentWeek) {
carte = svg.selectAll("path")
.data(franceJson.features);
// code en cas de mise a jour de la carte / de changement de semaine
carte.attr("class", "update")
.style("fill", function(d) {
var values = d.properties.values;
if (values && values[currentWeek]) {
return color(values[currentWeek]);
}
else {
// si pas de valeur alors en gris
return "#ccc";
}
})
.on('mousemove', function(d) {
var displayValue
if (d.properties.values){
displayValue = d.properties.values[currentWeek]
}
else{
displayValue = "undefined"
}
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>" + displayValue);
})
.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(franceJson.features)
.append("path")
.attr("class", "enter")
.style("fill", function(d) {
var values = d.properties.values;
// on vérifie que la région et la valeur associée à la semaine existent
if (values && values[currentWeek]) {
return color(values[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.values[currentWeek]);
})
.on('mouseout', function() {
tooltip.classed('hidden', true);
});
}
});
</script>
</body>
https://d3js.org/d3.v4.min.js