Google Map API更新实现用户自定义标注坐标

演示地址：http://www.yaohaixiao.com/effects/google-map.html
复制代码 代码如下:
if(typeof GoogleMap === 'undefined'){
var GoogleMap = {};
}
(function(){
if (!document.getElementById("fgmap")) {
return false;
}
else {
// 是否可创建Google地图控件
var isCompatible = new GBrowserIsCompatible();
if (isCompatible) {
var mapContainer = document.getElementById("fgmap");
// 创建GoogleMAP地图实例
var map = new GMap2(mapContainer);
// 地图默认的比例尺级别
var perviewLevel = 14;
// 大的地图缩放级别控件
var largeMapControl = new GLargeMapControl();
// 地图缩略图控件
var overviewMapControl = new GOverviewMapControl();
// 比例尺控件
var scaleControl = new GScaleControl();
// 地图类形选择控件
var mapTypeControl = new GMapTypeControl();
// 地址-坐标转换器
var geocoder = new GClientGeocoder();
// 上一次的查询地址
var lastAddress = '';
// 上一次的查询坐标
var lastPoint = null;
// 最后一个创建的标记控件
var lastMarker = null;
// 用户标记的最后一个坐标点
var cusLastPoint = null;

GoogleMap.mapMsg = [];

// 创建地图
GoogleMap.Map = function(lat, lng){
var point = new GLatLng(lat, lng);
map.addMapType(G_PHYSICAL_MAP);
map.setCenter(point, perviewLevel);

map.enableDoubleClickZoom();
map.enableScrollWheelZoom();
map.enableContinuousZoom();

map.addControl(largeMapControl)
map.addControl(overviewMapControl);
map.addControl(mapTypeControl);
map.addControl(scaleControl);
};

// 创建标记
GoogleMap.createMarker = function(latlng, markerOptions){
var marker = markerOptions ? new GMarker(latlng, markerOptions) : new GMarker(latlng);
lastMarker = marker;
return marker;
};

// 自定义标记选项

GoogleMap.setCustomIcon = function(IconOptions){
var myIcon = new GIcon(G_DEFAULT_ICON), i;
for (i in IconOptions) {
switch (i) {
case 'iconSize':
case 'shadowSize':
case 'dragCrossSize':
myIcon[i] = new GSize(IconOptions[i][0], IconOptions[i][1]);
break;
case 'iconAnchor':
case 'infoWindowAnchor':
case 'infoShadowAnchor':
case 'dragCrossAnchor':
myIcon.iconAnchor = new GPoint(IconOptions[i][0], IconOptions[i][1]);
break;
default:
myIcon[i] = IconOptions[i];
break;
}

}
return myIcon;
};

// 用户自定义标注
GoogleMap.customMarkPoint = function(){
var marker = null;
var markPoint = cusLastPoint ? new GLatLng(cusLastPoint[0],cusLastPoint[1]) : new GLatLng(lastPoint[0],lastPoint[1]);
var markOptions = {
icon: GoogleMap.setCustomIcon({
image: 'http://www.yaohaixiao.com/effects/img/icon13.png'
}),
draggable: true
};

marker = GoogleMap.createMarker(markPoint, markOptions);
GEvent.addListener(marker, "dragstart", function(){
map.closeInfoWindow();
});
GEvent.addListener(marker, "dragend", function(){
var custPoint = marker.getPoint();
var markTip = '';
markTip += '用户地图标注';
markTip += '

当前经纬度：(' + custPoint.lat() + ',' + custPoint.lng() + ')
';
markTip += '是否将新位置设置为此商户的默认位置？

';
markTip += 'marker.openInfoWindowHtml(markTip);
});
map.addOverlay(marker);
};

// 保存用户自定义坐标
GoogleMap.MapOk = function(){
var savedPoint = lastMarker.getPoint();
var lat = savedPoint.lat(), lng = savedPoint.lng();
var markTip = document.getElementById('cusMarkTip');
markTip.innerHTML = '正在上传您所保存的坐标信息...';
if (timer) {
clearTimeout(timer);
}
var timer = setTimeout(function(){
map.clearOverlays();
var marker = GoogleMap.createMarker(savedPoint);
if (GoogleMap.mapMsg) {
GEvent.addListener(marker, "click", function(){
var msg = '', j;
msg += '' + GoogleMap.mapMsg[1][0] + '';
for (var j = 1; j < GoogleMap.mapMsg[1].length; j++) {
msg += GoogleMap.mapMsg[1][j] + "
";
}
msg += "";
map.openInfoWindowHtml(savedPoint, msg);
});
}
map.addOverlay(marker);
map.setCenter(savedPoint);
cusLastPoint = [lat,lng];
}, 2000);
};

// 取消用户自定义坐标操作
GoogleMap.MapCancel = function(){
map.removeOverlay(lastMarker);
map.closeInfoWindow();
};

// 通过地址获得坐标
GoogleMap.getAddresslatlng = function(response){
var place = response.Placemark[0];
var point = new GLatLng(place.Point.coordinates[1], place.Point.coordinates[0]);
return [place.Point.coordinates[1], place.Point.coordinates[0], point, place];
};

// 标注坐标和相应的说明信息
GoogleMap.MarkerMap = function(lat, lng){
var marker = null;
var point = new GLatLng(lat, lng);
GoogleMap.Map(lat, lng);

marker = this.createMarker(point);
if (GoogleMap.mapMsg) {
GEvent.addListener(marker, "click", function(){
var msg = '', j;
msg += '' + GoogleMap.mapMsg[1][0] + '';
for (var j = 1; j < GoogleMap.mapMsg[1].length; j++) {
msg += GoogleMap.mapMsg[1][j] + "
";
}
msg += "";
map.openInfoWindowHtml(point, msg);
});
}
map.addOverlay(marker);
};

// 将查询地址添加到地图
GoogleMap.addAddressToMap = function(response){
map.clearOverlays();
if (!response || response.Status.code != 200) {
alert("对不起, 我们解析不到该地址的经纬度坐标！");
}
else {
var marker = null, point = GoogleMap.getAddresslatlng(response);
var address = point[3].address, lat = point[0], lng = point[1];
GoogleMap.mapMsg = (GoogleMap.mapMsg !== '' && (lastAddress === GoogleMap.mapMsg[0])) ? GoogleMap.mapMsg : [address, [point[3].address, ('经度：' + point[1]), ('纬度：' + point[0])]];
GoogleMap.MarkerMap(lat, lng);
lastPoint = [lat,lng];
}
};

// 将查询坐标添加到地图
GoogleMap.addPointToMap = function(cPoint){
map.clearOverlays();
var marker = null, lat = cPoint[0], lng = cPoint[1];
GoogleMap.MarkerMap(lat, lng);
lastPoint = [lat,lng];
};

// 通过地址/坐标将Marker显示到地图上
GoogleMap.showLocation = function(cPoint){
if (typeof cPoint === 'string') {
geocoder.getLocations(cPoint, this.addAddressToMap);
lastAddress = cPoint;
}
else{
GoogleMap.addPointToMap(cPoint);
}
};

GEvent.addListener(window, 'unload', GUnload);
}
else {
alert("对不起，您的浏览器不支持创建地图！");
}
}
})();