openlayer4 弹出框封装 -

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openlayer4 弹出框封装

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openlayers popup tootip 地图

很多场景需要在地图上弹出一个tooltip或者popup之类的小窗口显示一些信息，最近简单做了一下封装，方便后续调用，代码如下：

/*
	刘玉峰  jjxliu306@163.com
	2018-05-05
*/ 

//点击后高亮下方的feature 并且弹出popup信息做展示
Popup = function(map ){
	this.map = map ;
	 
	//添加一个popup的div
	var div = document.createElement("div");
	div.id = 'popup';
	div.className='ol-popup';
	div.innerHTML  =  ' <a href="#" id="popup_closer" class="ol-popup-closer"></a>  ' +  
    		'  <div id="popup_content"></div>  '  ;
	 
	document.body.appendChild(div);
	
	 var overlay = new ol.Overlay({
		   element:  div,
		   autoPan: true, 
		   autoPanAnimation: {
			   duration: 250
		   }/* ,
		   offset:[0,-45]*/
	   });
		map.addOverlay(overlay);
		//扔到map里 后面方便调用
		this.popup = overlay ;
	 
		document.getElementById('popup_closer').onclick = function() {
			overlay.setPosition(undefined);
 		 	//$('#popup_closer').blur();
     	 	return false;
		};
		  
}
  

/**
 * 泡泡显示信息 
 * @param _info 气泡内容
 * @param _position 气泡显示的位置 [lon,lat]
 */
Popup.prototype.tooltip = function(_info , _position) {
	
	document.getElementById('popup_content').innerHTML = _info ;
   
 	//设置popup的位置
 	this.popup.setPosition(_position);
 	
}

需要引入一个样式文件：

 .ol-popup {
        position: absolute;
        background-color: white;
        -webkit-filter: drop-shadow(0 1px 4px rgba(0,0,0,0.2));
        filter: drop-shadow(0 1px 4px rgba(0,0,0,0.2));
        padding: 15px;
        border-radius: 10px;
        border: 1px solid #cccccc;
        bottom: 12px;
        left: -50px;
        font:  italic bold 12px  ;
        min-width: 280px;
      }
      .ol-popup:after, .ol-popup:before {
        top: 100%;
        border: solid transparent;
        content: " ";
        height: 0;
        width: 0;
        position: absolute;
        pointer-events: none;
      }
      .ol-popup:after {
        border-top-color: white;
        border-width: 10px;
        left: 48px;
        margin-left: -10px;
      }
      .ol-popup:before {
        border-top-color: #cccccc;
        border-width: 11px;
        left: 48px;
        margin-left: -11px;
      }
      .ol-popup-closer {
        text-decoration: none;
        position: absolute;
        top: 2px;
        right: 8px;
      }
      .ol-popup-closer:after {
       content: "✖";
      }

2、测试，鼠标点击地图后弹出当前鼠标的点击位置信息：

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>openlayers-popup</title>
    <link rel="stylesheet" href="ol.css" type="text/css">
     <link rel="stylesheet" href="popup.css" type="text/css">
    <style>
      .map {
        height: 500px;
        width: 100%;
      }
    </style>
    <script src="ol.js" type="text/javascript"></script> 
    <script src="popup.js" type="text/javascript"></script>  
</head>
<body>
 <h2>openlayers  popup 工具封装测试  </h2>
 	
    <div id="map" class="map"></div> 
   
 <h2>刘玉峰 jjxliu306@163.com</h2>

    <script type="text/javascript">
     
  var osm = new ol.layer.Tile({
        source: new ol.source.OSM()
      });
    	 
    
      var map = new ol.Map({
        target: 'map',
        layers:[osm],
        view: new ol.View({
          center: [ 120, 30],
          zoom: 10,
          projection: 'EPSG:4326'
        })
      });
        
      var popup = new Popup(map); 
      //下面对鼠标点击时间进行监听
       map.on('click', function(evt) {
    	   var position = map.getEventCoordinate(evt.originalEvent); 
    	   popup.tooltip(position , position);
      });
       
    </script> 
     </body>
</html>

效果如图：