buildvis = {
const width = 960
const height = 600
const svg = d3.select(DOM.svg(width, height))
let path = d3.geoPath()
svg.append("g")
.attr("class", "counties")
.selectAll("path")
.data(topojson.feature(us, us.objects.counties).features)
.enter().append("path")
.attr("fill", d => colorScale(rateById.get(d.id)))
.attr("d", path)
.on("mouseover", function(d){
d3.select(this) // seleciona o elemento atual
.style("cursor", "pointer") //muda o mouse para mãozinha
.attr("stroke-width", 3)
.attr("stroke","#FFF5B1");
const rect = this.getBoundingClientRect();
showTooltip(d.id, rect.x, rect.y);
})
.on("mouseout", function(d){
d3.select(this)
.style("cursor", "default")
.attr("stroke-width", 0)
.attr("stroke","none"); //volta ao valor padrão
hideTooltip();
})
svg.append("path")
.datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; }))
.attr("class", "states")
.attr("d", path)
// Once we append the vis elments to it, we return the DOM element for Observable to display above.
return svg.node()
}
tooltip = {
d3.select("#tooltip").remove()
let node = d3.select("body")
.append("div")
.attr("id", "tooltip")
.attr("class", "hidden")
.append("p")
.html("<b id='name'></b><br/>Taxa de desemprego: <span id='taxa'></span>%")
return node
}
function showTooltip(county_id, x, y) {
const offset = 10;
const t = d3.select("#tooltip");
t.select("#name").text(nameById.get(county_id));
t.select("#taxa").text(rateById.get(county_id));
t.classed("hidden", false);
const rect = t.node().getBoundingClientRect();
const w = rect.width;
const h = rect.height;
if (x + offset + w > width) {
x = x - w;
}
t.style("left", x + offset + "px").style("top", y - h + "px");
}
function hideTooltip() {
d3.select("#tooltip")
.classed("hidden", true)
}
colorScale = d3.scaleQuantize()
.domain([1,10])
.range(d3.schemeGreens[9])
rateById =
d3.tsv("https://gist.githubusercontent.com/emanueles/7fbdcd8ee412e3e63904114cf9d7ee3a/raw/af4fd93db1be3f9033caff46d4a574a54bf9363f/unemployment.tsv").then(function (data) {
let rateMap = d3.map()
data.forEach(function(d) {
rateMap.set(d.id, +d.rate)
})
return rateMap
})
nameById =
d3.csv("https://gist.githubusercontent.com/emanueles/19cf3828bab232612c2b1599d831f690/raw/ddbaf62af22512a39360cc6741b40f5588b44aa0/county_names.csv").then(function (data) {
let nameMap = d3.map()
data.forEach(function(d) {
nameMap.set(d.id, d.name)
})
return nameMap
})
us = d3.json("https://gist.githubusercontent.com/emanueles/ee2997bc6237f3dcab952ae8becaf6bf/raw/afdb12d4ef89bb239998b295c94d960e8d89c19e/us.json")
topojson = require("topojson-client@3")
d3 = require('d3@5')
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