chart_line = {
const svg = d3.select(DOM.svg(width, height_line));
svg.append("g")
.call(xAxis_line);
svg.append("g")
.call(yAxis_line);
const path = svg.append("g")
.attr("fill", "none")
.attr("stroke", "steelblue")
.attr("stroke-width", 2)
.attr("stroke-linejoin", "round")
.attr("stroke-linecap", "round")
.selectAll("path")
.data(line_data.series)
.join("path")
.style("mix-blend-mode", "multiply")
.attr("d", d => line(d.values))
.attr("stroke", function(d, i){return z_line(i);} )
;
svg.call(hover, path);
return svg.node();
}
function hover(svg, path) {
svg
.style("position", "relative");
if ("ontouchstart" in document) svg
.style("-webkit-tap-highlight-color", "transparent")
.on("touchmove", moved)
.on("touchstart", entered)
.on("touchend", left)
else svg
.on("mousemove", moved)
.on("mouseenter", entered)
.on("mouseleave", left);
const dot = svg.append("g")
.attr("display", "none");
dot.append("circle")
.attr("r", 2.5);
dot.append("text")
.style("font", "10px sans-serif")
.attr("text-anchor", "middle")
.attr("y", -8);
function moved() {
d3.event.preventDefault();
const ym = y_line.invert(d3.event.layerY);
const xm = x_line.invert(d3.event.layerX);
const i1 = d3.bisectLeft(line_data.dates, xm, 1);
const i0 = i1 - 1;
const i = xm - line_data.dates[i0] > line_data.dates[i1] - xm ? i1 : i0;
const s = line_data.series.reduce((a, b) => Math.abs(a.values[i] - ym) < Math.abs(b.values[i] - ym) ? a : b);
path.attr("stroke", d => d === s ? null : "#ddd").filter(d => d === s).raise();
dot.attr("transform", `translate(${x_line(line_data.dates[i])},${y_line(s.values[i])})`);
dot.select("text").text(s.name);
}
function entered() {
path.style("mix-blend-mode", null).attr("stroke", "#ddd");
dot.attr("display", null);
}
function left() {
path.style("mix-blend-mode", "multiply")
.attr("stroke", function(d, i){return z_line(i);} )
dot.attr("display", "none");
}
}
margin_line = ({top: 20, right: 20, bottom: 30, left: 30})
xAxis_line = g => g
.attr("transform", `translate(0,${height_line - margin_line.bottom})`)
.call(d3.axisBottom(x_line).ticks(width / 80).tickSizeOuter(0))
yAxis_line = g => g
.attr("transform", `translate(${margin_line.left},0)`)
.call(d3.axisLeft(y_line))
.call(g => g.select(".domain").remove())
.call(g => g.select(".tick:last-of-type text").clone()
.attr("x", 3)
.attr("text-anchor", "start")
.attr("font-weight", "bold")
.text(line_data.y))
line = d3.line()
.defined(d => !isNaN(d))
.x((d, i) => x_line(line_data.dates[i]))
.y(d => y_line(d))
month_data = {
var to_return = [];
if (month != null){
var idx = ["Jan","Feb","Mar","Apr","May","Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"].indexOf(month);
var i;
for(i = 0; i < incident.length; i++){
to_return.push({
name: incident[i],
value: transformed_data[idx][incident[i]]
});
}
}
return to_return;
}
width = 975
height = width
innerRadius = 180
outerRadius = Math.min(width, height) / 2
d3 = require("d3@5")
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