javascript-动态填充的Google地图侧边栏

我一直在使用this V3 example之前的代码来设置一个链接栏,当选择了不同的类别过滤器时,该栏会动态填充,但是目前存在两个问题.首先,我将初始的makeSidebar函数放入地图的idle事件中,但仅在移动地图时才创建侧边栏,而不是在页面加载时才创建.其次,当在边栏中单击相应的链接时,似乎无法打开标记信息窗口.我的代码如下：

var map;
var infowindow;
var image = [];
var gmarkers = [];
var place;
var side_bar_html = "";

  image['attraction'] = 'http://google-maps-icons.googlecode.com/files/beach.png'; 
  image['food'] = 'http://google-maps-icons.googlecode.com/files/restaurant.png';
  image['hotel'] = 'http://google-maps-icons.googlecode.com/files/hotel.png';
  image['city'] = 'http://google-maps-icons.googlecode.com/files/smallcity.png';

function mapInit(){

    var placeLat = jQuery("#placelat").val();
    var placeLng = jQuery("#placelng").val();
    var centerCoord = new google.maps.LatLng(placeLat, placeLng); 

    var mapOptions = {
        zoom: 15,
        center: centerCoord,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };

    map = new google.maps.Map(document.getElementById("map"), mapOptions);

    google.maps.event.addListener(map, 'idle', function() {
      var bounds = map.getBounds();
      var ne = bounds.getNorthEast();
      var sw = bounds.getSouthWest();
      var yMaxLat = ne.lat();
      var xMaxLng = ne.lng();
      var yMinLat = sw.lat();
      var xMinLng = sw.lng();
      //alert("bounds changed");
      updateMap(yMaxLat, xMaxLng, yMinLat, xMinLng);
      show("attraction");
      show("food");
      show("hotel");
      show("city");
      makeSidebar();
    });

    function updateMap(yMaxLat, xMaxLng, yMinLat, xMinLng) {
    jQuery.getJSON("/places", { "yMaxLat": yMaxLat, "xMaxLng": xMaxLng, "yMinLat": yMinLat, "xMinLng": xMinLng }, function(json) {
      if (json.length > 0) {
        for (i=0; i<json.length; i++) {
          var place = json[i];
          var category = json[i].tag;
          var name = json[i].name;
          addLocation(place,category,name);
          //makeSidebar();
        }
      }
    });
   }

    function addLocation(place,category,name) {
      var marker = new google.maps.Marker({
        position: new google.maps.LatLng(place.geom.y, place.geom.x),
        map: map,
        title: place.name,
        icon: image[place.tag]
      });
      //var iwNode = document.getElementById("infowindow");

      marker.mycategory = category;
      marker.myname = name;
      gmarkers.push(marker);

      google.maps.event.addListener(marker, 'click', function() {
        if (infowindow) infowindow.close();
        infowindow = new google.maps.InfoWindow({
          content: "<div id='infowindow'><div id='infowindow_name'><p>"+ place.name +"</p></div><div id='infowindow_contents'><p>" + place.tag +"</p><a href='/places/"+place.id+"' id='place_link'>Show more!</a></div></div>"
        });
        infowindow.open(map, marker);
        google.maps.event.addListener(map, 'click', function() {
          infowindow.close();
        });
      });
    }

    function show(category) {
      for (var i=0; i<gmarkers.length; i++) {
        if (gmarkers[i].mycategory == category) {
          gmarkers[i].setVisible(true);
        }
      }
      document.getElementById(category+"box").checked = true;
    }

    function hide(category) {
      for (var i=0; i<gmarkers.length; i++) {
        if (gmarkers[i].mycategory == category) {
          gmarkers[i].setVisible(false);
        }
      }
      document.getElementById(category+"box").checked = false;
      infowindow.close();
    }

    function boxclick(box,category) {
      if (box.checked) {
        show(category);
      } else {
        hide(category);
      }
      makeSidebar();
    }

    jQuery('#attractionbox').click(function() {
      boxclick(this, 'attraction');
    });

    jQuery('#foodbox').click(function() {
      boxclick(this, 'food');
    });

    jQuery('#hotelbox').click(function() {
      boxclick(this, 'hotel');
    });

    jQuery('#citybox').click(function() {
      boxclick(this, 'city');
    });

    function myclick(i) {
      google.maps.event.trigger(gmarkers[i],"click");
    }

    function makeSidebar() {
      //var html = "";
      for (var i=0; i<gmarkers.length; i++) {
        if (gmarkers[i].getVisible()) {
          side_bar_html += '<a href="javascript:myclick(' + i + ')">' + gmarkers[i].myname + '<\/a><br>';
         }
       }
       document.getElementById("side_bar").innerHTML = side_bar_html;
    }
}

jQuery(document).ready(function(){
  mapInit();
  //makeSidebar();
});

任何帮助将不胜感激-我该怎么做才能在页面加载时加载侧栏,并使链接单击事件正常工作？谢谢！

解决方法:

链接不起作用的原因是,您在mapInit函数内部定义了my_click和makeSidebar函数,因此在mapInit范围之外不可用.只需将它们移出mapInit即可,一切都将正常工作.

至于加载事件…您正在寻找的是google.maps.event的addDomListener方法.只需使用

google.maps.event.addDomListener(window, 'load', name_of_your_inital_function);
// e. g. google.maps.event.addDomListener(window, 'load', mapInit);

最后; notta bene …不要这样做：

var image = [];
image['attraction'] = 'data'; 
image['food'] = 'more data';

数组不打算在Javascript中用作哈希.使用对象代替字典/哈希-这实际上是您在做的事情(数组“子类”对象),这将使其他人更容易使用您的代码(并使您免于烦恼).

var image = {};
image['attraction'] = 'data'; 
image['food'] = 'more data';

标签：google-maps,google-maps-api-3,javascript
来源： https://codeday.me/bug/20191209/2096680.html