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谷歌地图在地图上添加文字标注

2013-11-04 14:28 465 查看 
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map_canvas { height: 100% }
</style>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<script type="text/javascript">
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(31.397, 117.644),
zoom: 10,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"),
mapOptions);

var overlay = new MyMarker(map,{latlng:new google.maps.LatLng(31.397, 117.644),clickFun:zoomOut});

}

function zoomOut(){
alert(3333);
}

/***************自定义叠加层，可作为站点显示在地图上******************/
function MyMarker(map, options) {
// Now initialize all properties.
this.latlng = options.latlng; //设置图标的位置
this.image_ = options.image;  //设置图标的图片
this.labelText = options.labelText || 'dd';
this.labelClass = options.labelClass || 'shadow';//设置文字的样式
this.clickFun = options.clickFun ;//注册点击事件
//    this.labelOffset = options.labelOffset || new google.maps.Size(8, -33);
this.map_ = map;

this.div_ = null;
// Explicitly call setMap() on this overlay
this.setMap(map);
}
MyMarker.prototype = new google.maps.OverlayView();
//初始化图标
MyMarker.prototype.onAdd = function() {
// Note: an overlay's receipt of onAdd() indicates that
// the map's panes are now available for attaching
// the overlay to the map via the DOM.
// Create the DIV and set some basic attributes.
var div = document.createElement('DIV'); //创建存放图片和文字的div
div.style.border = "none";
div.style.borderWidth = "0px";
div.style.position = "absolute";
div.style.cursor = "hand";
div.onclick = this.clickFun ||function(){};//注册click事件，没有定义就为空函数
// Create an IMG element and attach it to the DIV.
var img = document.createElement("img"); //创建图片元素
img.src = this.image_;
img.style.width = "100%";
img.style.height = "100%";
//初始化文字标签
var label = document.createElement('div');//创建文字标签
label.className = this.labelClass;
label.innerHTML = '<a onclick="zoomOut()" href="#">'+this.labelText+'</a>';
label.style.position = 'absolute';
label.style.width = '200px';
//	label.style.fontWeight = "bold";
label.style.textAlign = 'left';
label.style.padding = "2px";
label.style.fontSize = "10px";
//	label.style.fontFamily = "Courier New";

div.appendChild(img);
div.appendChild(label);

this.div_ = div;
// We add an overlay to a map via one of the map's panes.
// We'll add this overlay to the overlayImage pane.
var panes = this.getPanes();
panes.overlayMouseTarget.appendChild(div);
}
//绘制图标，主要用于控制图标的位置
MyMarker.prototype.draw = function() {
// Size and position the overlay. We use a southwest and northeast
// position of the overlay to peg it to the correct position and size.
// We need to retrieve the projection from this overlay to do this.
var overlayProjection = this.getProjection();
// Retrieve the southwest and northeast coordinates of this overlay
// in latlngs and convert them to pixels coordinates.
// We'll use these coordinates to resize the DIV.
var position = overlayProjection.fromLatLngToDivPixel(this.latlng);   //将地理坐标转换成屏幕坐标
//  var ne = overlayProjection.fromLatLngToDivPixel(this.bounds_.getNorthEast());
// Resize the image's DIV to fit the indicated dimensions.
var div = this.div_;
div.style.left =position.x-5 + 'px';
div.style.top  =position.y-5 + 'px';
//控制图标的大小
div.style.width = '10px';
div.style.height ='10px';
}
MyMarker.prototype.onRemove = function() {
this.div_.parentNode.removeChild(this.div_);
this.div_ = null;
}

//Note that the visibility property must be a string enclosed in quotes
MyMarker.prototype.hide = function() {
if (this.div_) {
this.div_.style.visibility = "hidden";
}
}
MyMarker.prototype.show = function() {
if (this.div_) {
this.div_.style.visibility = "visible";
}
}
//显示或隐藏图标
MyMarker.prototype.toggle = function() {
if (this.div_) {
if (this.div_.style.visibility == "hidden") {
this.show();
} else {
this.hide();
}
}
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>
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标签：  google map 地图 api 遮罩层
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