图标分组

使用PointSimplifier.Render.Canvas.GroupStyleRender展示在海量点上做图标分组。

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          <!doctype html>
<html lang="zh-CN">

<head>
    <!-- 原始地址：//webapi.amap.com/ui/1.1/ui/misc/PointSimplifier/examples/multi-icons.html -->
    <base href="//webapi.amap.com/ui/1.1/ui/misc/PointSimplifier/examples/" />
    <meta charset="utf-8">
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
    <title>图标分组</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: 13px;
    }
    </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
    });

    //just some colors
    var colors = [
        "#3366cc", "#dc3912", "#ff9900", "#109618", "#990099", "#0099c6", "#dd4477", "#66aa00",
        "#b82e2e", "#316395", "#994499", "#22aa99", "#aaaa11", "#6633cc", "#e67300", "#8b0707",
        "#651067", "#329262", "#5574a6", "#3b3eac"
    ];


    function initPage(PointSimplifier, $) {

        var pointSimplifierIns, groupStyleMap;

        pointSimplifierIns = new PointSimplifier({
            zIndex: 115,
            //autoSetFitView: false,
            map: map, //所属的地图实例

            getPosition: function(item) {

                var lngLatLine = item.lngLatLine;

                if (!lngLatLine) {
                    return null;
                }

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

                return [parseFloat(parts[0]), parseFloat(parts[1])];
            },
            getHoverTitle: function(dataItem, idx) {
                return '序号: ' + idx;
            },
            //使用GroupStyleRender
            renderConstructor: PointSimplifier.Render.Canvas.GroupStyleRender,
            renderOptions: {
                //点的样式
                pointStyle: {
                    width: 5,
                    height: 5,
                    fillStyle:'#A2D0FA'
                },
                getGroupId: function(item, idx) {

                    return item.groupId;
                },
                groupStyleOptions: function(gid) {

                    return groupStyleMap[gid];
                }

            }
        });

        function onIconLoad() {
            pointSimplifierIns.renderLater();
        }

        function onIconError(e) {
            alert('图片加载失败！');
        }

        groupStyleMap = {
            '0': {
                pointStyle: {
                    //绘制点占据的矩形区域
                    content: PointSimplifier.Render.Canvas.getImageContent(
                        './imgs/bike.png', onIconLoad, onIconError),
                    //宽度
                    width: 16,
                    //高度
                    height: 16,
                    //定位点为中心
                    offset: ['-50%', '-50%'],
                    fillStyle: null,
                    //strokeStyle: null
                }
            },
            '1': {
                pointStyle: {
                    //绘制点占据的矩形区域
                    content: PointSimplifier.Render.Canvas.getImageContent(
                        './imgs/people.png', onIconLoad, onIconError),
                    //宽度
                    width: 16,
                    //高度
                    height: 16,
                    //定位点为中心
                    offset: ['-50%', '-50%'],
                    fillStyle: null,
                    // strokeStyle: null
                }
            },
            '2': {
                pointStyle: {
                    //绘制点占据的矩形区域
                    content: PointSimplifier.Render.Canvas.getImageContent(
                        './imgs/truck.png', onIconLoad, onIconError),
                    //宽度
                    width: 16,
                    //高度
                    height: 16,
                    //定位点为中心
                    offset: ['-50%', '-50%'],
                    fillStyle: null,
                    //strokeStyle: null
                }
            },
            '3': {
                pointStyle: {
                    //绘制点占据的矩形区域
                    content: PointSimplifier.Render.Canvas.getImageContent(
                        './imgs/taxi.png', onIconLoad, onIconError),
                    //宽度
                    width: 16,
                    //高度
                    height: 16,
                    //定位点为中心
                    offset: ['-50%', '-50%'],
                    fillStyle: null,
                    //strokeStyle: null
                }
            }
        };

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

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

            var lines = csv.split('\n'),
                data = [];

            for (var i = 0, len = lines.length; i < len; i++) {

                data.push({
                    lngLatLine: lines[i],
                    groupId: i % 5
                });
            }

            pointSimplifierIns.setData(data);
        });
    }

    AMapUI.load(['ui/misc/PointSimplifier', 'lib/$'], function(PointSimplifier, $) {

        if (!PointSimplifier.supportCanvas) {
            alert('当前环境不支持 Canvas！');
            return;
        }

        initPage(PointSimplifier, $);
    });
    </script>
</body>

</html>
        
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