点击后显示聚合标注

使用DistrictCluster实现点击后显示聚合标注的效果。

源代码编辑器
<!doctype html>
<html lang="zh-CN">

<head>
    <!-- 原始地址：//webapi.amap.com/ui/1.1/ui/geo/DistrictCluster/examples/click2show-marker.html -->
    <base href="//webapi.amap.com/ui/1.1/ui/geo/DistrictCluster/examples/" />
    <meta charset="utf-8">
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
    <title>点击后显示聚合标注</title>
    <style>
    html,
    body,
    #container {
        width: 100%;
        height: 100%;
        margin: 0px;
    }

    #loadingTip {
        position: absolute;
        z-index: 9999;
        top: 0;
        left: 0;
        padding: 3px 10px;
        background: red;
        color: #fff;
        font-size: 14px;
    }
    </style>
</head>

<body>
    <div id="container"></div>
    <script type="text/javascript" src='//webapi.amap.com/maps?v=2.0&key=您申请的key值'></script>
    <!-- UI组件库 1.0 -->
    <script src="//webapi.amap.com/ui/1.1/main.js?v=1.1.1"></script>
    <script type="text/javascript">
    //创建地图
    var map = new AMap.Map('container', {
        zoom: 4
    });

    function initPage(DistrictCluster, $) {

        var distCluster = new DistrictCluster({
            map: map, //所属的地图实例
            zIndex:11,
            getPosition: function(item) {

                if (!item) {
                    return null;
                }

                var parts = item.split(',');

                //返回经纬度
                return [parseFloat(parts[0]), parseFloat(parts[1])];
            },

            renderOptions: {
                clusterMarkerKeepConsistent: false, //marker的位置随交互变化
                getClusterMarkerPosition: function(feature) {
                    //返回之前存储的点击位置
                    return currentLngLat;

                    //return feature.properties.center;
                },
                getClusterMarker: function(feature, dataItems, recycledMarker) {

                    //不是当前feature，直接返回null
                    if (feature.properties.adcode !== currentAdcode) {
                        return null;
                    }

                    var container, title, body, nodeClassNames = {
                        title: 'amap-ui-district-cluster-marker-title',
                        body: 'amap-ui-district-cluster-marker-body',
                        container: 'amap-ui-district-cluster-marker'
                    };

                    if (recycledMarker) {

                        container = recycledMarker.getContent();

                        title = $(container).find('.' + nodeClassNames.title)[0];

                        body = $(container).find('.' + nodeClassNames.body)[0];

                    } else {

                        container = document.createElement('div');

                        title = document.createElement('span');

                        title.className = nodeClassNames.title;

                        body = document.createElement('span');

                        body.className = nodeClassNames.body;

                        container.appendChild(title);

                        container.appendChild(body);
                    }

                    var props = feature.properties,
                        routeNames = [];

                    var classNameList = [nodeClassNames.container, 'level_' + props.level, 'adcode_' + props.adcode];

                    container.className = classNameList.join(' ');

                    if (routeNames.length > 0) {

                        routeNames.push(props.name);

                        container.setAttribute('title', routeNames.join('>'));

                    } else {
                        container.removeAttribute('title');
                    }

                    $(title).html(props.name);
                    $(body).html(dataItems.length);

                    var resultMarker = recycledMarker || new AMap.Marker({
                        topWhenClick: true,
                        offset: new AMap.Pixel(-20, -30),
                        content: container
                    });

                    return resultMarker;
                }
            }
        });

        var currentAdcode = null,
            currentLngLat = null;

        //监听区划面的点击
        distCluster.on('featureClick', function(e, feature) {

            currentAdcode = feature.properties.adcode;

            //记住点击位置
            currentLngLat = e.originalEvent.lnglat;

            //重绘
            distCluster.renderLater();
        });

         //监听区划面之外的点击
        distCluster.on('outsideClick', function(e) {

            currentAdcode = currentLngLat = null;

            //重绘
            distCluster.renderLater();
        });

        window.distCluster = distCluster;

        $('<div id="loadingTip">加载数据，请稍候...</div>').appendTo(document.body);
        $.get('http://a.amap.com/amap-ui/static/data/10w.txt', function(csv) {

            $('#loadingTip').remove();

            var data = csv.split('\n');

            distCluster.setData(data);
        });
    }

    //加载相关组件
    AMapUI.load(['ui/geo/DistrictCluster', 'lib/$'], function(DistrictCluster, $) {

        window.DistrictCluster = DistrictCluster;

        //启动页面
        initPage(DistrictCluster, $);
    });
    </script>
</body>

</html>
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