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线段渐变色源代码展示

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<!DOCTYPE html>

<html>
  <head>
    <meta charset="UTF-8" />
    <meta
      name="viewport"
      content="initial-scale=1,maximum-scale=1,user-scalable=no"
    />
    <!--
        以下CSS地址请在安装软件了替换成本地的地址
        CSS地址请使用:
        http://localhost:9000/bigemap.js/v2.1.0/bigemap.css
        软件下载地址 http://www.bigemap.com/reader/download/detail201802017.html
    -->
    <link
      href="http://www.bigemap.com:9000/bigemap.js/v2.1.0/bigemap.css"
      rel="stylesheet"
    />
    <link
      href="https://cdn.bootcss.com/Buttons/2.0.0/css/buttons.min.css"
      rel="stylesheet"
    />

    <!--
        JS地址请使用：
        http://localhost:9000/bigemap.js/v2.1.0/bigemap.js
    -->
    <script src="http://www.bigemap.com:9000/bigemap.js/v2.1.0/bigemap.js"></script>
    <script src="http://www.bigemap.com/Public/offline/js/line_canvas_bigemap.js"></script>
    <script src="http://www.bigemap.com/Public/offline/js/linecolor_coords.js"></script>
    <style>
      body {
        margin: 0;
        padding: 0;
      }

      #map {
        position: absolute;
        top: 0;
        bottom: 0;
        width: 100%;
      }
      .tool {
        position: absolute;
        z-index: 10;
        right: 10px;
        top: 40px;
      }
    </style>
    <title>Google Map Streets</title>
  </head>

  <body>
    <div id="map"></div>
    <p class="tool">
      <button
        id="satellite"
        onclick="showF()"
        class="button button-tiny button-rounded button-primary"
        href="javascript:void (0);"
      >
        线段显示
      </button>
      <button
        id="street"
        onclick="hideF()"
        class="button button-tiny button-rounded button-primary"
        href="javascript:void (0);"
      >
        线段隐藏
      </button>
      <button
        id="street"
        onclick="setLatLng()"
        class="button button-tiny button-rounded button-primary"
        href="javascript:void (0);"
      >
        重新设置经纬度
      </button>
    </p>
    <script>
      // 软件配置信息地址，软件安装完成之后使用本地地址，如：http://localhost:9000
      BM.Config.HTTP_URL = "http://www.bigemap.com:9000";
      // 在ID为map的元素中实例化一个地图，并设置地图的ID号为 bigemap.baidu-map，ID号程序自动生成，无需手动配置，并设置地图的投影为百度地图 ，中心点，默认的级别和显示级别控件
      var map = BM.map("map", "bigemap.zhongkexingtu", {
        center: [0, 0],
        zoom: 2,
        zoomControl: true,
        attributionControl: false,
      });

      // coords示例坐标
      //线段的坐标点
      var latlngs = [
        [30, 102.68, 150],
        [33, 108.43, 200],
        [37.04, 118.2, 300],
      ];

      var hotlineLayer = BM.hotline(coords, {
        //根据自身数据设置对应的min max
        min: 150,
        max: 300,
        //根据min/max自定计算对应的比例  相对于的颜色
        palette: {
          0.0: "white",
          0.5: "green",
          0.8: "yellow",
          1.0: "red",
        },
        weight: 5, //宽度
        outlineColor: "pink", //外框的颜色】
        outlineWidth: 3, //外框宽度
      }).addTo(map);

      //事件文档
      //   http://www.bigemap.com/offlinemaps/api/#interactive-layer-event
      //点击事件
      hotlineLayer.on("click", (e) => {
        // e.target 线段的实例对象
      });

      //鼠标移动事件
      hotlineLayer.on("mousemove", (e) => {
        // e.target 线段的实例对象
      });

      //线段显示
      function showF() {
        hotlineLayer.addTo(map);
      }

      //线段删除
      function hideF() {
        hotlineLayer.remove();
      }

      function setLatLng() {
        //设置样式
        hotlineLayer.setStyle({
          palette: {
            0.0: "white",
            0.5: "green",
            0.8: "yellow",
            1.0: "blue",
          },
          weight: 5, //宽度
          outlineColor: "red", //外框的颜色】
          outlineWidth: 1, //外框宽度
        });

            //设置经纬度
        hotlineLayer.setLatLngs(latlngs);
      }

      map.fitBounds(hotlineLayer.getBounds());
    </script>
  </body>
</html>