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<title></title> <style type="text/css"> html { height: 100%; } body { height: 100%; margin: 0px; padding: 0px; } #map_canvas { height: 80%; } </style> <script type="text/javascript" src=""> </script> <script type="text/javascript"> var map = null; var myLableMessage = null; //【初始化地图】 //=========================================================================================================================== function initialize() { //构建经纬度点 var latlng = new google.maps.LatLng(30.277925, 120.177597); var myOptions = { zoom: 8, center: latlng, mapTypeId: google.maps.MapTypeId.HYBRID };
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions); } //【自定义OverlayView】 //=========================================================================================================================== function myLable(latlng, text, map) { this.latlng_ = latlng; this.text_ = text; this.map_ = map; this.div_ = null; this.setMap(map); }
myLable.prototype = new google.maps.OverlayView(); //您应当继承此类，方法是将叠加层的 prototype 设置为 new OverlayView.prototype
//必须实现三个方法，即 onAdd()、draw() 和 onRemove()。在 draw() 方法中，应放置这些元素。 //在 add() 方法中，您应当创建 DOM 对象，并将其作为窗格的子对象附加。调用有效地图对象的.setMap() myLable.prototype.onAdd = function () {
var div = document.createElement('DIV'); div.style.border = "none"; div.style.borderWidth = "0px"; div.style.position = "absolute"; div.innerHTML = this.text_; this.div_ = div; var panes = this.getPanes(); panes.floatPane.appendChild(div); ;
} //每当地图属性更改时都会调用 draw() 方法，该方法可以更改元素的位置，如缩放、中心或地图类型。 myLable.prototype.draw = function () {
var overlayProjection = this.getProjection();
var position = overlayProjection.fromLatLngToDivPixel(this.latlng_);
var div = this.div_; div.style.left = position.x + 'px'; div.style.top = position.y + 'px'; div.style.width = '100px'; div.style.background = "#ffffff"; div.style.border = "1px solid #85a5b4"; }
//在 onRemove() 方法中，应将对象从 DOM 中删除。清除时调用有效地图对象的.setMap(null) myLable.prototype.onRemove = function () { this.div_.parentNode.removeChild(this.div_); this.div_ = null; } //=========================================================================================== function LableMessage() { var lat = document.getElementById("lat_text").value; var lng = document.getElementById("lng_text").value; var text = document.getElementById("content_text").value; var latlng = new google.maps.LatLng(parseFloat(lng), parseFloat(lat)); //如果myLableMessage不为null，则清除原来的 if (myLableMessage != null) { myLableMessage.setMap(null); myLableMessage = null; } //调用自定义OverlayView myLableMessage = new myLable(latlng, text, map); }
function ClearLableMessage() { if (myLableMessage != null) { myLableMessage.setMap(null); myLableMessage = null; } } </script></head>
<body onload="initialize()"> <div id="map_canvas" style="width: 80%; height: 100%; float: left;"> </div> <div id="Div1" style="width: 20%; height: 100%; overflow: scroll;"> <hr /> <p style="text-align: center;">