Cycling through phases of professionalism and sheer silly
Published
Edited
Jul 2, 2020
chart = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height])
const tooltip = d3.select("body").append("div")
.attr("class", "svg-tooltip")
.style("position", "absolute")
.style("visibility", "hidden")
// Three function that change the tooltip when user hover / move / leave a cell
const mouseover = function(d) {
tooltip.style("visibility", "visible")
d3.selectAll("rect")
.filter((e) => {
return d.crime === e.crime })
.style("stroke", "gray")
.style("stroke-width", 2)
.style("opacity", 1)
}
const mousemove = function(d) {
tooltip.style("visibility", "visible")
.style("top", (d3.event.pageY-10)+"px").style("left", (d3.event.pageX+10)+"px")
.html(d.crime)
}
const mouseleave = function(d) {
tooltip.style("visibility", "hidden");
d3.selectAll("rect")
.filter((e) => {
return d.crime === e.crime })
.style("stroke", "none")
.style("opacity", 0.8)
}
const g = svg.append("g")
.selectAll("g")
.data(augmentedData)
.join("g")
.selectAll("rect")
.data(d => d)
.join("rect")
.attr("fill", d => colorCrimes(d.crime))
.attr("x", (d, i) => x(d.data.area))
.attr("y", d => y(d[1]))
.attr("height", d => y(d[0]) - y(d[1]))
.attr("width", x.bandwidth())
.on("mouseover", mouseover)
.on("mousemove", mousemove)
.on("mouseleave", mouseleave)
svg.append("g")
.call(xAxis)
svg.append("g")
.call(yAxis)
svg.append("text")
.attr("x", (width/2))
.attr("y", margin.top)
.attr("text-anchor", "middle")
.attr("font-size", "24px")
.attr("font-family", "sans-serif")
.text(`Top 5 Crimes Per LA Police Area, ${currentYearData[0].year_rptd}`)
svg.append("text")
.attr("x", (width/2))
.attr("y", height - margin.bottom/3)
.attr("text-anchor", "middle")
.attr("font-size", "16px")
.attr("font-family", "sans-serif")
.text("Neighborhoods")
svg.append("text")
.attr("transform", "rotate(-90)")
.attr("x", -height/2)
.attr("y", margin.left-40)
.attr("text-anchor", "middle")
.attr("font-size", "16px")
.attr("font-family", "sans-serif")
.text("Number of Incidents")
svg.selectAll(".tick")
.attr("font-size", "8px")
return svg.node()
}
currentYearData = top5.filter((obj) => obj.year_rptd == yearSelection)
sortedData = groupedData.sort((a,b) => niceReduce(b) - niceReduce(a))
augmentedData = stackedData.slice(0).map(
(layer) => {
layer.map((d) => {
let diff = d[1] - d[0]
for (const prop in d.data) {
if ((prop !== 'area') && (d.data[prop].total == diff)) {
d.crime = d.data[prop].crimeName
d.data.crime = d.crime
}
}
return d
})
return layer
}
)
niceReduce = function(a) {
return a.reduce((acc, curr) => acc + curr.total, 0)
}
color = d3.scaleOrdinal()
.domain(stackedData.map(d => d.key))
.range(d3.schemePurples[stackedData.length])
.unknown("#ccc")
uniqueCrimes = Array.from(new Set(currentYearData.map(d => d.crime)))
colorCrimes = d3.scaleOrdinal()
.domain(uniqueCrimes)
.range(d3.schemeSet3)
uniqueCrimes.map(d => colorCrimes(d))
x = d3.scaleBand()
.domain(formattedData.map(d => d.area))
.range([margin.left, width - margin.right])
.padding(0.1)
y = d3.scaleLinear()
.domain([0, 7000])
.rangeRound([height - margin.bottom, margin.top])
xAxis = g => g
.attr("transform", `translate(0,${height - margin.bottom})`)
.call(d3.axisBottom(x).tickSizeOuter(0))
.call(g => g.selectAll(".domain").remove())
yAxis = g => g
.attr("transform", `translate(${margin.left},0)`)
.call(d3.axisLeft(y).ticks(null, "s"))
.call(g => g.selectAll(".domain").remove())
import {swatches} from "@d3/color-legend"
styles = html`
<style>
.svg-tooltip {
font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
background: rgba(69,77,93,.9);
border-radius: .1rem;
color: #fff;
display: block;
font-size: 11px;
max-width: 320px;
padding: .2rem .4rem;
position: absolute;
text-overflow: ellipsis;
white-space: pre;
z-index: 300;
visibility: hidden;
}
</style>`
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