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amap-cluster-canvas

v2.1.0

Published

高德地图点聚合插件canvas版本

Downloads

21

Readme

amap-cluster-canvas

高德地图点聚合插件 canvas 版本

配置项

| 属性 | 类型 | 描述 | 默认值 | | --- | --- | --- | --- | | data | Array | 数据集 | null | | coordinate | Coordinate | 聚合策略 | Coordinate.AMAP | | maxZoom | Number | 最大的聚合级别,大于该级别就不进行相应的聚合 | 18 | | gridSize | Number | 聚合计算时,网格的像素大小 | 60 | | minClusterSize | Number | 聚合的最小数量,小于该数量个点则不能成为一个聚合 | 2 | | averageCenter | Boolean | 是否取所有点的平均值作为聚合点中心 | true | | zoomOnClick | Boolean | 点击聚合点时,是否展开聚合 | true | | zIndex | Number | canvas 图层的 zindex | 120 | | visible | Boolean | 是否显示 | true | | getPosition | Function | 获取经纬度信息 | ({location})=>location ? [location.longitude,location.latitude] : null | | render | Function | 绘制函数 | null | | hoverRender | Function | hover 状态下的绘制函数 | null | | clickHandler | Function | click 事件 | null | | mouseoutHandler | Function | mouseout 事件 | null | | mouseoverHandler | Function | mouseover 事件 | null | | mousemoveHandler | Function | mousemove 事件 | null | | normalPointStyle | Object | 实体点的样式 | defaultStyle | | clusterPointStyle | Object | 聚合点的样式 | defaultStyle | | hoverNormalPointStyle | Object | hover 状态下实体点的样式 | defaultStyle | | hoverClusterPointStyle | Object | hover 状态下聚合点的样式 | defaultStyle | | 2.0 版本新增 | | offset | Array | 绘制的图形相对于 定位点 的偏移度 | null |

实例方法

| 方法 | 描述 | 参数 | | --- | --- | --- | | setData | 设置数据 | data: 数据源,rebuild: 是否重新构建绘制(可选,默认:true) | | render | 立即重绘 | - | | renderLater | throttle 版本 | number | | destroy | 销毁 | - |

Coordinate

点的聚合策略:

  1. 根据点在 地图容器 上的相对坐标来判断是否需要聚合。
  2. 根据点在 墨卡托坐标系 上的绝对坐标进行聚合。
// cluster.js
export const Coordinate = {
  AMAP: 'AMAP',
  MERCATOR: 'MERCATOR',
}

defaultStyle

点的默认样式:因为时间紧迫,并没有提供内置的点绘制功能,样式配置主要是提供点的 width & height 属性;因为 canvas 事件中需要根据点的坐标与点的大小查找当前事件的触发对象。

// 默认的点样式
const defaultStyle = {
  width: 60,
  height: 69,
}

offset

绘制的图形相对于 定位点 的偏移度。

// 支持 百分比 || px
const offsetItem = Number | String
const offset = [offsetItem, offsetItem]

事件

直接使用参数的形式进行事件处理,简单暴力。

测试


1、git clone [email protected]:liuweiGL/amap-cluster-canvas.git
2、npm install
3、npm start

打包


npm run build