<template> <svg :viewBox="`0 0 ${ viewBoxX } ${ viewBoxY }`" style="overflow:visible"> <defs> <linearGradient :id="gradientId" x1="0" x2="0" y1="1" y2="0"> <stop offset="0%" :stop-color="color" stop-opacity="0"></stop> <stop offset="100%" :stop-color="color" stop-opacity="0.65"></stop> </linearGradient> </defs> <polygon :points="polygonPoints" :style="`stroke: none; fill: url(#${ gradientId });`" /> <polyline :points="polylinePoints" fill="none" :stroke="color" stroke-width="2" /> <circle :cx="headX" :cy="headY" r="3" :fill="color" /> </svg> </template> <script lang="ts" setup> import { watch } from 'vue'; import { v4 as uuid } from 'uuid'; import tinycolor from 'tinycolor2'; import { useInterval } from '@/scripts/use-interval'; const props = defineProps<{ src: number[]; }>(); const viewBoxX = 50; const viewBoxY = 50; const gradientId = uuid(); let polylinePoints = $ref(''); let polygonPoints = $ref(''); let headX = $ref<number | null>(null); let headY = $ref<number | null>(null); let clock = $ref<number | null>(null); const accent = tinycolor(getComputedStyle(document.documentElement).getPropertyValue('--accent')); const color = accent.toRgbString(); function draw(): void { const stats = props.src.slice().reverse(); const peak = Math.max.apply(null, stats) || 1; const _polylinePoints = stats.map((n, i) => [ i * (viewBoxX / (stats.length - 1)), (1 - (n / peak)) * viewBoxY, ]); polylinePoints = _polylinePoints.map(xy => `${xy[0]},${xy[1]}`).join(' '); polygonPoints = `0,${ viewBoxY } ${ polylinePoints } ${ viewBoxX },${ viewBoxY }`; headX = _polylinePoints.at(-1)![0]; headY = _polylinePoints.at(-1)![1]; } watch(() => props.src, draw, { immediate: true }); // Vueが何故かWatchを発動させない場合があるので useInterval(draw, 1000, { immediate: false, afterMounted: true, }); </script>