Question

我使用mapquest MQA.Nominatim模块对我的java脚本代码中的地址进行地理编码。我想将其他信息传递给回调函数MQA.Nominatim.constructPOI 这些信息应根据每个地理位置而有所不同我使用javascript闭包来封装每个回调函数中的数据（这在Google地理编码API中可以正常工作）。
MQA.Nominatim始终调用最后设置的回调函数。在猜测MQA.Nominatim.constructPOI是一个如何全局地址指针所以我最终得到了地图上所有位置的所有标志和附加信息任何想法如何解决这个问题？

我的代码如下：

<html>
<head>
    <script src="http://open.mapquestapi.com/sdk/js/v7.0.s/mqa.toolkit.js?key=xxxxxxx"></script>

    <script type="text/javascript">

        var flags = ['icons/flag_green.png', 'icons/flag_red.png'];

        var addressArr = [
     [', 49084 Osnabrueck, Germany','R','/trac/start/ticket/6677','Repair #6677'],
     [', 39599 Uchtspringe, Germany','R','/trac/start/ticket/6670','Repair #6670'],
     [', 17491 Greifswald, Germany','I','/trac/start/ticket/6625','Install #6625'],
     [', 37269 Eschwege, Germany','R','/trac/start/ticket/6620','Repair #6620'],
     [', 57076 Siegen, Germany','R','/trac/start/ticket/6602','Repair #6602'],
     [', 3109 St Poelten, Germany','I','/trac/start/ticket/6598','Install #6598'],
     [', 45884 Gelsenkirchen, Austria','R','/trac/start/ticket/6594','Repair #6594'],
     [', 48653 Coesfeld, Germany','R','/trac/start/ticket/6588','Repair #6588']
        ];

     function locationsCallback (location, osmLocation) {
            var type = location[1];
            var url = location[2];
            var title = location[3];
            var image = flags[0];
            if ('R' == type)
                  image = flags[1];

            /*Override the custom POI generation*/
            var lat = osmLocation.lat;
            var lng = osmLocation.lon;
            var p = new MQA.Poi({
               lat : lat,
               lng : lng
            });
            var customIcon = new MQA.Icon(image, 20, 29);
            p.setIcon(customIcon);

            /*Override the custom text populating the InfoWindow content*/
            p.setRolloverContent('<div style="font-size:14px;">' + title + '</div>');
            p.setInfoContentHTML('<div style="font-size:14px; width:180px;">' + url + '</div>');
            return p;
        };

        // define a function wich does the actual work of the callback and a func
        function setMarker (location) {
            MQA.Nominatim.constructPOI = function (osmLocation) {
                var callbackLoc = location;
                return locationsCallback(callbackLoc, osmLocation);
            };

            /*Executes a Nominatim search and adds the result to the map*/
            map.nominatimSearchAndAddLocation(location[0], null);
        }

       function setMarkers () {
           for (var i = 0; i < addressArr.length; i++) {
                var thisLoc = addressArr[i];
                // alert("Iteration: " + i + "   Geocode: " + location);

                /*This uses the MQA.withModule support to download and initialize the Nominatim support module. The constructPOI
                method is called to override the default behavior of constructing a POI.*/
                setMarker(thisLoc);
            }

       }
        function initialize() {

            /*Create an object for options*/
            var options = {
               elt : document.getElementById('map'), /*ID of element on the page where you want the map added*/
               zoom : 11, /*initial zoom level of map*/
               latLng: { lat:50.202250, lng:10.079730 },    /*center of the map is Bad Kissingen*/
               mtype:'osm',                                 /*map type (osm)*/
               bestFitMargin: 0,                            /*margin offset from the map viewport when applying a bestfit on shapes*/
               zoomOnDoubleClick: true                      /*zoom in when double-clicking on map*/
            };

            /*Construct an instance of MQA.TileMap with the options object*/
            window.map = new MQA.TileMap(options);

            /*This uses the MQA.withModule support to download and initialize the Nominatim support module. The constructPOI
              method is called to override the default behavior of constructing a POI.*/
            MQA.withModule('nominatim', setMarkers);
        };

        MQA.EventUtil.observe(window, 'load', initialize);

    </script>
</head>

<body>
    <div id='map' style='width:100%; height:750px;'></div>
</body>

MQA.Nominatim：如何将各种信息传递给多个MQA.Nominatim.constructPOI回调？

0 个答案: