按索引聚合

使用 AMap.IndexCluster 根据索引对点进行聚合。

源代码编辑器
<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
    <title>按索引聚合</title>
    <link rel="stylesheet" href="http://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css"/>
    <style>
        html, body, #container {
            height: 100%;
            width: 100%;
        }
        .amap-cluster {
            display: flex;
            justify-content: center;
            flex-direction: column;
            align-items: center;
            font-size: 12px;
        }
        .showName {
            font-size: 14px;
        }
        .showCount,.showName {
            display: block;
            text-overflow: ellipsis;
            white-space: nowrap;
            overflow: hidden;
            width: 80%;
        }
    </style>
</head>
<body>
<div id="container" class="map"></div>
<script src="http://a.amap.com/jsapi_demos/static/data/community.js"></script>
<script src="http://a.amap.com/jsapi_demos/static/data/district.js"></script>
<script src="http://webapi.amap.com/maps?v=2.0&key=您申请的key值&plugin=AMap.IndexCluster"></script>

<script type="text/javascript">
    map = new AMap.Map("container", {
        zoom: 9,
        animateEnable: true,
        mapStyle: "amap://styles/grey",
    });
    var count = points.length;
    function clusterMarkers() {
        var markerList = [];
        var marker = new AMap.Marker({
            map: map,
        })
        markerList.push(marker);
        return markerList;
    }
    var clusterIndexSet = {
        city: {
            minZoom: 2,
            maxZoom: 10,
        },
        district: {
            minZoom: 10,
            maxZoom: 12,
        },
        area: {
            minZoom: 12,
            maxZoom: 15,
        },
        community: {
            minZoom: 15,
            maxZoom: 22,
        },
    };
    function getStyle(context) {
        var clusterData = context.clusterData; // 聚合中包含数据
        var index = context.index; // 聚合的条件
        var count = context.count; // 聚合中点的总数
        var marker = context.marker; // 聚合绘制点 Marker 对象
        var color = [
            '8,60,156',
			'66,130,198',
            '107,174,214',
            '78,200,211',
        ];
        var indexs = ['city','district','area','community'];
        var i = indexs.indexOf(index['mainKey']);
        var text = clusterData[0][index['mainKey']];
        var size = Math.round(30 + Math.pow(count / points.length, 1 / 5) * 70);
        if(i <= 2){
            var extra = '<span class="showCount">'+ context.count +'套</span>';
            text = '<span class="showName">'+ text +'</span>';
            text += extra;
        } else {
            size = 12 * text.length + 20;
        }
        var style = {
            bgColor: 'rgba(' + color[i] + ',.8)',
            borderColor: 'rgba(' + color[i] + ',1)',
            text: text,
            size: size,
            index: i,
            color: '#ffffff',
            textAlign: 'center',
            boxShadow: '0px 0px 5px rgba(0,0,0,0.8)'
        }
        return style;
    }
    function getPosition(context) {
        var key = context.index.mainKey;
        var dataItem = context.clusterData && context.clusterData[0];
        var districtName = dataItem[key];
        if(!district[districtName]) {
            return null;
        }
        var center = district[districtName].center.split(',');
        var centerLnglat = new AMap.LngLat(center[0], center[1]);
        return centerLnglat;
    }
    function _customRender (data) {
        const keys = Object.keys(data.clusterData);
        let markers = [];
        for (var i = 0; i < keys.length; i++) {
            var key = keys[i];
            var cluster = data.clusterData[key];
            var position = cluster.data[0].lnglat;
            var marker = new AMap.LabelMarker({
                position: position,
                text: {
                    content: cluster.data.length.toString(),
                    style: {
                        fillColor: '#ffffff'
                    }
                }
            });
            markers.push(marker)
        }
        return {
            type: 'type',
            layer: null,
            markers: markers,
        };
    }
    // 自定义聚合点样式
    function _renderClusterMarker (context) {
        var clusterData = context.clusterData; // 聚合中包含数据
        var index = context.index; // 聚合的条件
        var count = context.count; // 聚合中点的总数
        var marker = context.marker; // 聚合点标记对象
        var styleObj = getStyle(context);
        // 自定义点标记样式
        var div = document.createElement('div');
        div.className = 'amap-cluster';
        div.style.backgroundColor = styleObj.bgColor;
        div.style.width = styleObj.size + 'px';
        if(styleObj.index <= 2) {
            div.style.height = styleObj.size + 'px';
            // 自定义点击事件
            context.marker.on('click', function(e) {
                console.log(e)
                var curZoom = map.getZoom();
                if(curZoom < 20){
                    curZoom += 1;
                }
                map.setZoomAndCenter(curZoom, e.lnglat);
            });
        }
        div.style.border = 'solid 1px ' + styleObj.borderColor;
        div.style.borderRadius = styleObj.size + 'px';
        div.innerHTML = styleObj.text;
        div.style.color = styleObj.color;
        div.style.textAlign = styleObj.textAlign;
        div.style.boxShadow = styleObj.boxShadow;
        context.marker.setContent(div)
        // 自定义聚合点标记显示位置
        var position = getPosition(context);
        if(position){
            context.marker.setPosition(position);
        }
        context.marker.setAnchor('center');

    };
    
    var cluster = new AMap.IndexCluster(map, points, {
        renderClusterMarker: _renderClusterMarker,
        clusterIndexSet: clusterIndexSet,
    });
    
</script>
</body>
</html>
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