实现地图放大覆盖物出现圆，缩小到一定级别变成其他形状 

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <style type="text/css">
        body, html {width: 100%;height: 100%;margin:0;font-family:"微软雅黑";}
        #allmap{width:100%;height:500px;}
        p{margin-left:5px; font-size:14px;}
    </style>
    <script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=351KhDAvqI7L3ADGgXphAg973htwu7WZ"></script>
    <title>实现地图放大出现圆，缩小到一定级别变成其他形状</title>
</head>
<body>
    <div id="allmap"></div>
    
</body>
</html>
<script type="text/javascript">
    // 百度地图API功能
    var mp = new BMap.Map("allmap");
    mp.centerAndZoom(new BMap.Point(106.33,29.35), 8);
    mp.enableScrollWheelZoom();
    // 复杂的自定义覆盖物
    function ComplexCustomOverlay(point, text, mouseoverText){
      this._point = point;
      this._text = text;
      this._overText = mouseoverText;
    }
    ComplexCustomOverlay.prototype = new BMap.Overlay();
    ComplexCustomOverlay.prototype.initialize = function(map){
      this._map = map;
      var div = this._div = document.createElement("div");
      div.style.position = "absolute";
      div.style.zIndex = BMap.Overlay.getZIndex(this._point.lat);
      div.style.backgroundColor = "#EE5D5B";
      div.style.border = "1px solid #BC3B3A";
      div.style.color = "white";
       var s=map.getZoom();
     if(s>=8){
         div.style.borderRadius="100%";
          div.style.height = "100px"; 
          div.style.width = "100px"; 
          div.style.padding = "2px";
          div.style.lineHeight = "18px";  
          div.style.whiteSpace = "nowrap";
          div.style.MozUserSelect = "none";
          div.style.fontSize = "12px"
          var span = this._span = document.createElement("span");
          div.appendChild(span);
          span.appendChild(document.createTextNode(this._text)); 
          span.style.textAligh = "center";
          span.style.position="absolute";
          
          span.style.top="40px"
           span.style.left="20px" 
     }else{
         div.style.borderRadius="0";
            div.style.height = "18px";
             div.style.padding = "2px";
              div.style.lineHeight = "18px";  
              div.style.whiteSpace = "nowrap";
              div.style.MozUserSelect = "none";
              div.style.fontSize = "12px"
              var span = this._span = document.createElement("span");
              div.appendChild(span);
              span.appendChild(document.createTextNode(this._text)); 
              span.style.textAligh = "center";
           
             
     } 
       
      var that = this;

      var arrow = this._arrow = document.createElement("div");
      arrow.style.background = "url(http://map.baidu.com/fwmap/upload/r/map/fwmap/static/house/images/label.png) no-repeat";
      arrow.style.position = "absolute";
      arrow.style.width = "11px";
      arrow.style.height = "10px";
      arrow.style.top = "22px";
      arrow.style.left = "10px";
      arrow.style.overflow = "hidden";
      div.appendChild(arrow);
     

      mp.getPanes().labelPane.appendChild(div);
      
      return div;
    }
    ComplexCustomOverlay.prototype.draw = function(){
      var map = this._map;
      var pixel = map.pointToOverlayPixel(this._point);
      this._div.style.left = pixel.x - parseInt(this._arrow.style.left) + "px";
      this._div.style.top  = pixel.y - 30 + "px";
    }
    var txt = "银湖海岸城", mouseoverTxt = txt + " " + parseInt(Math.random() * 1000,10) + "套" ;
       
       
    var myCompOverlay1 = new ComplexCustomOverlay(new BMap.Point(106.6304300000, 29.7179800000), "渝北区");
var myCompOverlay2 = new ComplexCustomOverlay(new BMap.Point(106.6304300000, 29.7179800000), "渝北");
    mp.addOverlay(myCompOverlay1);
mp.addEventListener("zoomend", function() {
          var temp = mp.getZoom();
        if(temp<=12){    
        
            mp.clearOverlays();
             mp.addOverlay(myCompOverlay2);
            
            
            
        }else{    
            
            mp.clearOverlays();
         mp.addOverlay(myCompOverlay1);
        }
        
        
             
    
        });   
</script>

 

posted @ 2017-06-19 10:09  iriliguo  阅读(325)  评论(0)    收藏  举报