在Google Maps API v3中使用MarkerClusterer限制缩放级别时出错

问题描述

我使用的代码在这里找到：

我在Firebug中遇到错误：

 错误：TypeError：markers is undefined 
  

并且无法计算出导致它的原因。具体的代码是：

  var minClusterZoom = 14; 
 mc.setMaxZoom（minClusterZoom）; 
 gm.event.addListener（mc，'clusterclick'，function（cluster）{
 map.fitBounds（cluster.getBounds（））; //适合点击
的集群边界如果（map.getZoom（）> minClusterZoom + 1）//如果放大过去15（第一级没有集群），缩小到15 
 map.setZoom（minClusterZoom + 1）; 
}） ; 
  

非常感谢任何帮助。
- Tom

解决方案

我采用了不同的方法：并编辑MarkerClusterer来源如下

从

  / ** 
 *如果设置了该选项，则触发clusterclick事件和缩放。 
 * / 
 ClusterIcon.prototype.triggerClusterClick = function（）{
 var markerClusterer = this.cluster_.getMarkerClusterer（）; 
 
 //触发clusterclick事件。 
 google.maps.event.trigger（markerClusterer，'clusterclick'，this.cluster_）; 
 
 if（markerClusterer.isZoomOnClick（））{
 //放大集群。 
 this.map_.fitBounds（this.cluster_.getBounds（））; 
} 
}; b 
 
 
 
 
 
 code> / ** 
 *如果设置了该选项，则触发clusterclick事件和缩放。 
 * / 
 ClusterIcon.prototype.triggerClusterClick = function（）{
 var markerClusterer = this.cluster_.getMarkerClusterer（）; 
 
 //触发clusterclick事件。 
 google.maps.event.trigger（markerClusterer，'clusterclick'，this.cluster_）; 
 
 if（markerClusterer.isZoomOnClick（））{
 //放大集群。 
 this.map_.fitBounds（this.cluster_.getBounds（））; 
 
 //修改放大函数
 if（this.map_.getZoom（）> markerClusterer.getMaxZoom（）+ 1）
 this.map_.setZoom（markerClusterer.getMaxZoom （）+1）; 
} 
}; 
  

I'm using code found here: Integrating Spiderfier JS into markerClusterer V3 to explode multi-markers with exact same long / lat to restrict zoom levels when clicking on MarkerClusterer created clusters containing points at the same location.

Live example is here: http://www.adultlearnersfestival.com/newsite/yourarea/map.html

I'm getting an error in Firebug however:

Error: TypeError: markers is undefined

and can't work out what's causing it. The specific code is:

var minClusterZoom = 14;
mc.setMaxZoom(minClusterZoom);
gm.event.addListener(mc, 'clusterclick', function(cluster) {
  map.fitBounds(cluster.getBounds()); // Fit the bounds of the cluster clicked on
  if( map.getZoom() > minClusterZoom+1 ) // If zoomed in past 15 (first level without clustering), zoom out to 15
  map.setZoom(minClusterZoom+1);
});

Any help much appreciated.- Tom

解决方案

I took a different approach suggested here: markerClusterer on click zoom and edited the MarkerClusterer source as follows

from this

/**
 * Triggers the clusterclick event and zoom's if the option is set.
 */
ClusterIcon.prototype.triggerClusterClick = function() {
  var markerClusterer = this.cluster_.getMarkerClusterer();

  // Trigger the clusterclick event.
  google.maps.event.trigger(markerClusterer, 'clusterclick', this.cluster_);

  if (markerClusterer.isZoomOnClick()) {
    // Zoom into the cluster.
    this.map_.fitBounds(this.cluster_.getBounds());
  }
};

to this

/**
 * Triggers the clusterclick event and zoom's if the option is set.
 */
ClusterIcon.prototype.triggerClusterClick = function() {
  var markerClusterer = this.cluster_.getMarkerClusterer();

  // Trigger the clusterclick event.
  google.maps.event.trigger(markerClusterer, 'clusterclick', this.cluster_);

  if (markerClusterer.isZoomOnClick()) {
    // Zoom into the cluster.
    this.map_.fitBounds(this.cluster_.getBounds());

    // modified zoom in function
        if( this.map_.getZoom() > markerClusterer.getMaxZoom()+1 )
          this.map_.setZoom(markerClusterer.getMaxZoom()+1);
  }
};

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