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125 lines
3.0 KiB
HTML
125 lines
3.0 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>CPU 负载图</title>
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</head>
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<style>
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body {
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font-family: Arial, sans-serif;
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margin: 0;
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padding: 0;
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display: flex;
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justify-content: center;
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align-items: center;
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height: 100vh;
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background-color: #f4f4f9;
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}
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.chart-container {
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width: 80%;
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max-width: 600px;
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background: white;
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border-radius: 8px;
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box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
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padding: 20px;
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}
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.chart-title {
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text-align: center;
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font-size: 18px;
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margin-bottom: 20px;
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}
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canvas {
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display: block;
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width: 100%;
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height: auto;
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}
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</style>
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<body>
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<div class="chart-container">
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<div class="chart-title">CPU 负载 (%)</div>
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<canvas id="cpuChart" width="600" height="300"></canvas>
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</div>
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</body>
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<script>
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// 初始化 CPU 负载数据
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cpuLoadData = [];
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// 获取 Canvas 上下文
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const canvas = $node.querySelector("#cpuChart");
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const ctx = canvas.getContext("2d");
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// 绘制图表
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drawChart = () => {
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const width = canvas.width;
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const height = canvas.height;
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// 清空画布
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ctx.clearRect(0, 0, width, height);
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// 设置图表样式
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ctx.strokeStyle = "#007bff";
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ctx.lineWidth = 2;
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ctx.fillStyle = "#007bff";
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// 绘制坐标轴
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ctx.beginPath();
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ctx.moveTo(30, 10);
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ctx.lineTo(30, height - 10);
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ctx.lineTo(width - 10, height - 10);
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ctx.stroke();
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// 绘制刻度和标签
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const maxValue = 100; // 最大负载值为 100%
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const step = 20;
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for (let i = 0; i <= maxValue; i += step) {
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const y = height - 10 - ((i / maxValue) * (height - 20));
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ctx.fillText(i + "%", 5, y + 5);
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ctx.beginPath();
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ctx.moveTo(25, y);
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ctx.lineTo(30, y);
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ctx.stroke();
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}
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// 绘制折线图
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if (cpuLoadData.length > 0) {
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const dataLength = cpuLoadData.length;
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const xStep = (width - 40) / dataLength;
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ctx.beginPath();
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ctx.moveTo(30, height - 10 - ((cpuLoadData[0] / maxValue) * (height - 20)));
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for (let i = 1; i < dataLength; i++) {
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const x = 30 + i * xStep;
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const y = height - 10 - ((cpuLoadData[i] / maxValue) * (height - 20));
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ctx.lineTo(x, y);
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}
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ctx.stroke();
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}
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};
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// 更新 CPU 负载数据并重新绘制
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updateCpuLoad = () => {
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// 模拟生成随机 CPU 负载数据
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const newLoad = Math.random() * 100;
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cpuLoadData.push(newLoad);
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// 限制数据点数量（最多显示 30 个点）
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if (cpuLoadData.length > 30) {
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cpuLoadData.shift();
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}
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// 重新绘制图表
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drawChart();
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};
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// 初始化定时器，每秒更新一次数据
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intervalId = setInterval(updateCpuLoad, 1000);
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</script>
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<script>
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// 页面卸载时清除定时器
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window.addEventListener("beforeunload", () => {
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clearInterval(intervalId);
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});
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</script>
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</html>
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