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我有一个越来越复杂的谷歌地图，它绘制了数千个点并将它们聚集在一起。当用户单击其中一个地图标记时，我打开了一个信息窗口，这一切都很好。但是，我想做的一项改进是在打开新信息窗口时强制所有其他信息窗口关闭，以便一次只能打开 1 个信息窗口。

我已经尝试if (infowindow) infowindow.close();在侦听器函数中添加一些代码（一个新的。因此，通过阅读这一点，似乎只有一个可以重用的信息窗口而不是多个信息窗口是一个更好的主意。

麻烦的是，代码处于我能真正理解的边缘，到目前为止我做这件事的实验已经破坏了一切。

我目前拥有的代码如下：

var _iconCenter = new google.maps.MarkerImage('/css/img/map-marker.png',
  new google.maps.Size(38, 48),
  new google.maps.Point(0,0),
  new google.maps.Point(19, 44));

var shadow = new google.maps.MarkerImage('/css/img/map-marker-shadow.png',
  new google.maps.Size(57, 49),
  new google.maps.Point(0,0),
  new google.maps.Point(7, 44));

var _icon = '/css/img/map-marker-purple.png';
var infowindow;
var markersArray = [];
var map;
var currentPosition = 0;
var currentmarker;
var firstload = true;
var maploaded = false;
var interval = 5000;
var geocoder;

var stylez = [];

function initialize(items,loop,zoom) {
  geocoder = new google.maps.Geocoder();
  if (items.length > 0) {
    var latlng = new google.maps.LatLng(items[0].Lat, items[0].Lng);
    var myOptions = {
      zoom: zoom,
      center: latlng,
      //mapTypeControl: false,
      streetViewControl: false,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    };

    map = new google.maps.Map(document.getElementById("map"), myOptions);
    map.setOptions({styles: stylez});

    for (var i = 0; i < items.length; i++) {
      var marker = new google.maps.Marker({
        position: new google.maps.LatLng(items[i].Lat, items[i].Lng),
        title: items[i].Title,
        icon: _icon,
        shadow: shadow,
        infocontent: items[i].Description
      });
      marker.setMap(map);
      attachListener(marker,'marker:'+i);
      markersArray.push(marker);
    }


    //set style options for marker clusters (these are the default styles)
    mcOptions = {
      gridSize: 44
    }


    var markerCluster = new MarkerClusterer(map, markersArray, mcOptions);
    google.maps.event.addListener(map, "tilesloaded", function () {
      if(loop == true){
        SetLoop();
      }
    });


    function attachListener(marker,content){
      google.maps.event.addListener(marker, "click", function () {
        var infowindow = new google.maps.InfoWindow();
        map.setCenter(new google.maps.LatLng(marker.getPosition().lat(), marker.getPosition().lng()));
        infowindow.setContent(content);
        infowindow.open(map,this);
      });
    }    

  }
}


function SetLoop() {
//This will fire everytime map loads or recenteres
  maploaded = true;
  if (firstload) {
    firstload = false;
    Recenter();
  }
}


function Recenter() {
  //If previous iteration is not loaded completely, wait to avoid errors
  //It could happen for slow internet connection
  if (maploaded) {
    maploaded = false;
  } else {
    //keep adding 1 second to interval for slow connection till page loads
    interval = interval + 1;
    setTimeout("Recenter()", interval);
    return;
  }

  if (infowindow != null && currentmarker != null) {
    //currentmarker.icon = _icon;
    currentmarker.icon = _iconCenter;
    currentmarker.setMap(map);
    infowindow.close(map, currentmarker);
  }

  markersArray[currentPosition].icon = _iconCenter;
  markersArray[currentPosition].setMap(map);
  map.setCenter(new google.maps.LatLng(markersArray[currentPosition].getPosition().lat(), markersArray[currentPosition].getPosition().lng()));

  infowindow = new google.maps.InfoWindow({
    content: markersArray[currentPosition].infocontent,
    size: new google.maps.Size(50, 50)
  });
  infowindow.open(map, markersArray[currentPosition]);
  currentmarker = markersArray[currentPosition];
  if (currentPosition >= markersArray.length - 1) {
    currentPosition = 0;
  } else {
    currentPosition++;
  }
  if (markersArray.length > 1) {
    setTimeout("Recenter()", interval);
  }
}

是重新使用信息窗口的最佳方式还是可以以另一种方式执行此操作？任何帮助我在这里指出正确的方向将不胜感激，谢谢大家！

4

1 回答 1

9

从函数 attachListener() 中删除“var infowindow”声明。如果在函数内部声明它，它将成为函数的本地实例，并且每次执行函数时都会创建一个新实例。所以：

function attachListener(marker,content){
      google.maps.event.addListener(marker, "click", function () {

      // marker.getPosition() already returns a google.maps.LatLng() object
      map.setCenter(marker.getPosition());
      infowindow.close();
      infowindow.setContent(content);
      infowindow.open(map,this);
      });
    }

而是将其声明为全局变量：

var _icon = '/css/img/map-marker-purple.png';
var infowindow = new google.maps.InfoWindow();
//...etc

这样您在整个应用程序中只有一个 infowindow 对象

于 2012-08-16T09:58:51.560 回答