2023-12-08 23:18:42 +08:00
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<meta http-equiv="X-UA-Compatible" content="IE=edge" />
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<meta
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name="viewport"
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content="initial-scale=1.0, user-scalable=no, width=device-width"
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/>
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<title>热力图</title>
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<script src="./static/tailwind.min.js"></script>
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<link href="./static/remixicon/remixicon.css" rel="stylesheet" />
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<style>
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html,
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body,
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#container {
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margin: 0;
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padding: 0;
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width: 100%;
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height: 100%;
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}
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</style>
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</head>
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<body>
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<div id="container"></div>
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<div
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class="fixed border rounded-lg shadow-xl bottom-4 left-4 right-4 bg-white"
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>
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<div class="flex flex-row flex-nowrap items-center p-4">
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<button
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class="h-7 w-7 rounded-full transition-all hover:bg-slate-200 mb-6 mx-1"
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id="play-btn"
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onclick="startOrPause()"
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>
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<i class="ri-play-line"></i>
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</button>
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<div class="grow relative mb-6 mx-1">
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<input
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type="range"
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min="0"
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max="11"
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value="0"
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id="control-bar"
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class="h-2 w-full cursor-pointer appearance-none rounded-lg bg-gray-200"
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oninput="updateData(this.value)"
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/>
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2023-12-09 00:03:03 +08:00
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<!-- 一种让 slider 下标和对应档位对齐的奇技淫巧：
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在其下方放置 flex 容器，其中放置 space-between 的若干 label。此时，由于文字宽度的影响，无法真正对齐，产生偏移。
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考虑将每个 label 实际大小设为 0，这样 label 可以实际对齐；放置其 absolute 的子元素，其中放置实际要显示的文字，
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该 span 通过指定 left 和 translate 可以实现文字中线和父元素对齐，从而实现文字和 slider 档位对齐，作为 slider 刻度。
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此外，注意 x 轴 padding 应该设为 slider 上按钮半径大小，因为 slider 实际开始位置不是该元素最左端，而是滑块在最左端时的中心点。
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-->
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<div
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class="-bottom-6 flex w-full flex-nowrap justify-between px-2 text-sm text-gray-500"
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2023-12-08 23:18:42 +08:00
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>
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2023-12-09 00:03:03 +08:00
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">1</span></span
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>
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">2</span></span
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>
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">3</span></span
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>
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">4</span></span
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>
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">5</span></span
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>
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">6</span></span
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>
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">7</span></span
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>
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">8</span></span
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>
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">9</span></span
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>
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">10</span></span
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>
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">11</span></span
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>
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<span class="relative">
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<span class="absolute left-1/2 -translate-x-1/2">12</span></span
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>
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</div>
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2023-12-08 23:18:42 +08:00
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</div>
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</div>
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</div>
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<script type="text/javascript">
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window._AMapSecurityConfig = {
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securityJsCode: "0bc2f7560c1da34a09c921a92fce4502",
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};
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</script>
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<script src="https://webapi.amap.com/maps?v=2.0&key=13471667a960ce7a08b3dfdd9a4fb193"></script>
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<script src="./heatmapData.js"></script>
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<script>
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var map = new AMap.Map("container", {
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resizeEnable: true,
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center: [116.418261, 39.921984], // 配置地图中心的经纬度
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zoom: 11,
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});
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if (!isSupportCanvas()) {
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alert("您所使用的浏览器不能使用热力图功能，请换个浏览器试试～");
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}
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// heatmap.js document:
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// http://www.patrick-wied.at/static/heatmapjs/docs.html
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/* visible 热力图是否显示, 默认为 true
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* opacity 热力图的透明度, 分别对应 heatmap.js的minOpacity和maxOpacity
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* radius 热力图的每个点的半径大小
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* gradient {JSON} 热力图的渐变区间 . gradient如下所示
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* {
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.2:'rgb(0, 255, 255)',
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.5:'rgb(0, 110, 255)',
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.8:'rgb(100, 0, 255)'
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}
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其中 key 表示插值的位置, 0-1
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value 为颜色值
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*/
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var heatmap;
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var playing = false;
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map.plugin(["AMap.HeatMap"], function () {
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heatmap = new AMap.HeatMap(map, {
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radius: 25, //给定半径
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opacity: [0, 0.8],
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/*,
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gradient:{
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0.5: 'blue',
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0.65: 'rgb(117,211,248)',
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0.7: 'rgb(0, 255, 0)',
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0.9: '#ffea00',
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1.0: 'red'
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}
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*/
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});
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heatmap.setDataSet({
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max: 100,
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data: heatmapData[0],
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});
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});
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function isSupportCanvas() {
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var elem = document.createElement("canvas");
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return !!(elem.getContext && elem.getContext("2d"));
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}
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function showHeatmap() {
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heatmap.show();
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}
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function hideHeatmap() {
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heatmap.hide();
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}
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function updateData(value) {
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heatmap.setDataSet({
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data: heatmapData[value],
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max: 100,
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});
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}
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function startOrPause() {
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if (playing) {
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playing = false;
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let btn = document.getElementById("play-btn");
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btn.innerHTML = '<i class="ri-play-line"></i>';
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stopPlay();
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} else {
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playing = true;
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let btn = document.getElementById("play-btn");
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btn.innerHTML = '<i class="ri-pause-line"></i>';
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startPlay();
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}
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}
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function startPlay() {
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let slider = document.getElementById("control-bar");
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intervalID = setInterval(function () {
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if (slider.value < 11) {
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slider.value++;
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updateData(slider.value);
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} else {
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startOrPause();
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}
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}, 100); // Do every 100ms
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}
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function stopPlay() {
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clearInterval(intervalID);
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}
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</script>
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</body>
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</html>
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