Area - Contour Density
Code
ChartUtil.tsx
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"use client";
// reference: https://d3-graph-gallery.com/graph/density2d_contour.html
import { ChartProps } from "@/types";
import React, { useRef, useCallback, useEffect } from "react";
import { useResizeObserver } from "@/hooks/useResizeObserver";
import * as d3 from "d3";
const ChartUtil = ({ data: rawData }: ChartProps) => {
const data = Object.values(rawData);
const containerRef = useRef<HTMLDivElement | null>(null);
const renderFunc = useCallback(() => {
const container = containerRef.current as HTMLElement;
if(!container) return;
const margin = {top: 50, right: 25, bottom: 25, left: 25},
width = container.offsetWidth - margin.left - margin.right,
height = 600 - margin.top - margin.bottom;
const svg = d3.select(container)
.html('')
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform",
"translate(" + margin.left + "," + margin.top + ")");
const x = d3.scaleLinear()
.domain([5, 20])
.range([ 0, width ]);
svg.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x))
.call(d => d.selectAll('text')
.attr('font-family', 'Space Mono')
.attr('font-size', 14));
const y = d3.scaleLinear()
.domain([5, 22])
.range([ height, 0 ]);
svg.append("g")
.call(d3.axisLeft(y))
.call(d => d.selectAll('text')
.attr('font-family', 'Space Mono')
.attr('font-size', 14));
const densityData = d3.contourDensity()
.x(function(d: any) { return x(d.x); })
.y(function(d: any) { return y(d.y); })
.size([width, height])
.bandwidth(20)
(data as any)
svg
.selectAll("path")
.data(densityData)
.enter()
.append("path")
.attr("d", d3.geoPath())
.attr("fill", "none")
.attr("stroke", "#69bfdd")
.attr("stroke-linejoin", "round")
.attr('stroke-width', 2)
}, [data]);
useEffect(() => {
containerRef.current !== null && renderFunc();
}, [renderFunc]);
const resizeHandler = useCallback(() => {
containerRef.current !== null && renderFunc();
}, [renderFunc]);
useResizeObserver(containerRef, resizeHandler);
return <div ref={containerRef}></div>;
}
export default ChartUtil