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<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="https://d3js.org/topojson.v1.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="53" min="1" max="53" step="1" />
<span id="week">week</span>
</div>
<script>
var width = 960,
height = 400;
var svg = d3.select("body")
.append("svg")
.attr("width", width)
.attr("height", height);
var tooltip = d3.select('body').append('div')
.attr('class', 'hidden tooltip');
// On definit une echelle de couleur
var color = d3.scaleQuantize()
.range(["#f2f0f7", "#dadaeb", "#bcbddc", "#9e9ac8", "#756bb1", "#54278f"]);
d3.csv("GrippeFrance2014.csv", function (data) {
// Get all the weeks
var weeksArray = Object.keys(data[0]);
var jsonValues = [];
d3.json("regions.json", function (json) {
//On fusionne les donnees avec le GeoJSON
for (var i = 0; i < data.length; i++) {
//Nom de l'etat
var dataState = data[i].region;
//Valeur associee a l'etat
var dataValue = parseFloat(data[i].somme2014);
//Recherche de l'etat dans le GeoJSON
for (var j = 0; j < json.features.length; j++) {
var jsonState = json.features[j].properties.nom;
if (dataState == jsonState) {
//On injecte la valeur de l'Etat dans le json
json.features[j].properties.value = Object.values(data[i]);
//Pas besoin de chercher plus loin
break;
}
}
}
var projection = d3.geoAlbers()
.center([0, 49.5])
.rotate([-2.8, 3])
.parallels([45, 55])
.scale(2200)
.translate([width / 2, height / 2]);
var path = d3.geoPath()
.projection(projection);
updateViz(53);
function drawMap(currentWeek) {
var departement = svg.selectAll('.departement')
.data(json.features).enter();
departement.append('path')
.attr('class', function (d) {
return 'province ' + d.properties.code;
})
.attr("d", path).style("fill", function (d) {
//on prend la valeur recuperee plus haut
var value = d.properties.value;
if (value) {
//Set input domain for color scale
return color(d.properties.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);
});
tooltip.classed('hidden', false)
.attr('style', 'left:' + (mouse[0] + 15) +
'px; top:' + (mouse[1] - 35) + 'px')
.html(function () {
if (d.properties.value)
return d.properties.nom + ": " + d.properties.value[currentWeek];
else
return d.properties.nom + ": 0";
})
})
.on('mouseout', function () {
tooltip.classed('hidden', true);
});
}
d3.select("#slider").on("input", function () {
updateViz(+this.value);
});
// update the elements
function updateViz(value) {
//console.log("update " + "value");
d3.select('#week').html(weeksArray[value]);
setColorDomain(weeksArray[value]);
drawMap(value);
}
function setColorDomain(week) {
if (week) {
var values = [];
data.forEach(element => {
values.push(element[week]);
});
color.domain([
d3.min(values) / 2,
d3.max(values) * 3
]);
} else {
color.domain([
500, 5000
]);
}
}
});
});
</script>
</body>
https://d3js.org/d3.v4.min.js
https://d3js.org/topojson.v1.min.js