Javascript 清除谷歌地图中的路线指示
我有一组从XML加载的标记;单击标记时,我会呈现从当前位置到标记位置的方向。但是,我希望能够清除路线,最好是在用户单击其他标记时。目前所有路线都显示在一起。我不知道我把事情搞砸了。我已经尝试了directionsDisplay.setMap(null),但是没有清除它们。如果您注意到问题所在,请告诉我。多谢各位Javascript 清除谷歌地图中的路线指示,javascript,google-maps,google-maps-api-3,Javascript,Google Maps,Google Maps Api 3,我有一组从XML加载的标记;单击标记时,我会呈现从当前位置到标记位置的方向。但是,我希望能够清除路线,最好是在用户单击其他标记时。目前所有路线都显示在一起。我不知道我把事情搞砸了。我已经尝试了directionsDisplay.setMap(null),但是没有清除它们。如果您注意到问题所在,请告诉我。多谢各位 function loadGoogleMap(){ // load google map var script = document.createElement('scr
function loadGoogleMap(){
// load google map
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = 'https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&' +
'callback=MyMap';
document.body.appendChild(script);
}
var map = ''
function MyMap(){
/*
document.getElementById('finddate').value
*/
var im = 'http://www.robotwoods.com/dev/misc/bluecircle.png';
var CustomMarker = 'http://findmyyard.com/images/MarkerIcon.png';
if(navigator.geolocation){
navigator.geolocation.getCurrentPosition(locate, noPos());
} else {
noPos();
}
function locate(position){
var directionsDisplay = new google.maps.DirectionsRenderer();
var directionsService = new google.maps.DirectionsService();
var myLatLng = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
var mapOptions = {
zoom: 12,
center: myLatLng,
mapTypeId: google.maps.MapTypeId.ROADMAP,
zoomControl: false,
streetViewControl: false,
mapTypeControl: false,
panControlOptions: { position: google.maps.ControlPosition.TOP_RIGHT},
zoomControlOptions: { position: google.maps.ControlPosition.TOP_RIGHT }
}
var map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
var userMarker = new google.maps.Marker({
position: myLatLng,
map: map,
icon: im
});
var infoWindow = new google.maps.InfoWindow;
// Change this depending on the name of your PHP file
downloadUrl("phps/xmltest.php", function(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
var name = markers[i].getAttribute("name");
var address = markers[i].getAttribute("address");
var dt1 = markers[i].getAttribute("date1");
var dt2 = markers[i].getAttribute("date2");
var dt3 = markers[i].getAttribute("date3");
var tm1 = markers[i].getAttribute("time1");
var tm2 = markers[i].getAttribute("time2");
var tm3 = markers[i].getAttribute("time3");
var pid = markers[i].getAttribute("PID");
var d = new Date();
var raw = pid * d.getFullYear();
var jshtml = '<a href='+'phps/info.php?raw='+ raw +'>More Info</a>'
var html = "<b>" + name + "</b> <br/>" + "Date of Yard Sale: " + dt1 + ' ' + tm1 + ' ' + dt2 + ' ' + tm2 + ' ' + dt3 + ' ' + tm3 + ' ' + "<br/>" + address + " " + "Click this for: " + jshtml;
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("lat")),
parseFloat(markers[i].getAttribute("lng")));
var marker = new google.maps.Marker({
map: map,
position: point,
icon: CustomMarker
});
bindInfoWindow(marker, map, infoWindow, html, directionsDisplay);
}
});
function bindInfoWindow(marker, map, infoWindow, html, directionsDisplay) {
google.maps.event.addListener(marker, 'click', function() {
infoWindow.setContent(html);
infoWindow.open(map, marker, html);
center: position;
directionsDisplay.setMap(null)
directionsDisplay.setDirections({routes: []});
directionsDisplay = null;
directionsDisplay = new google.maps.DirectionsRenderer();
directionsDisplay.setMap(map)
var start = myLatLng;
var latitude = marker.getPosition().lat().toFixed(6)
var longitude = marker.getPosition().lng().toFixed(6)
var end = new google.maps.LatLng(latitude, longitude);
var request = {
origin:start,
destination:end,
travelMode: google.maps.TravelMode.DRIVING
};
directionsService.route(request, function(result, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setMap(null)
directionsDisplay.setMap(map);
directionsDisplay.setDirections(result);
}
});
});
}
function downloadUrl(url, callback) {
var request = window.ActiveXObject ?
new ActiveXObject('Microsoft.XMLHTTP') :
new XMLHttpRequest;
request.onreadystatechange = function() {
if (request.readyState == 4) {
request.onreadystatechange = doNothing;
callback(request, request.status);
}
};
request.open('GET', url, true);
request.send();
}
function doNothing() {}
}
函数loadGoogleMap(){
//加载谷歌地图
var script=document.createElement('script');
script.type='text/javascript';
script.src=https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&' +
'callback=MyMap';
document.body.appendChild(脚本);
}
变量映射=“”
函数MyMap(){
/*
document.getElementById('finddate').value
*/
var im=http://www.robotwoods.com/dev/misc/bluecircle.png';
自定义标记变量http://findmyyard.com/images/MarkerIcon.png';
if(导航器.地理位置){
navigator.geolocation.getCurrentPosition(locate,noPos());
}否则{
noPos();
}
功能定位(位置){
var directionsDisplay=new google.maps.DirectionsRenderer();
var directionsService=new google.maps.directionsService();
var myLatLng=new google.maps.LatLng(position.coords.latitude,position.coords.longitude);
变量映射选项={
缩放:12,
中心:myLatLng,
mapTypeId:google.maps.mapTypeId.ROADMAP,
动物控制:错误,
街景控制:错误,
mapTypeControl:false,
panControlOptions:{position:google.maps.ControlPosition.TOP_RIGHT},
ZoomControl选项:{position:google.maps.ControlPosition.TOP_RIGHT}
}
var map=new google.maps.map(document.getElementById('map-canvas'),
地图选项);
var userMarker=new google.maps.Marker({
职位:myLatLng,
地图:地图,
图标:即时通讯
});
var infoWindow=new google.maps.infoWindow;
//根据PHP文件的名称更改此选项
下载URL(“phps/xmltest.php”,函数(数据){
var xml=data.responseXML;
var markers=xml.documentElement.getElementsByTagName(“标记”);
对于(var i=0;i“+”庭院销售日期:“+dt1+”+tm1+”+dt2+”+tm2+”+dt3+”+tm3+”
“+地址+”+”+”点击此链接获得:“+jshtml;
var point=new google.maps.LatLng(
parseFloat(标记[i].getAttribute(“lat”),
parseFloat(markers[i].getAttribute(“lng”));
var marker=new google.maps.marker({
地图:地图,
位置:点,,
图标:自定义标记
});
bindInfoWindow(标记、地图、infoWindow、html、方向显示);
}
});
函数bindInfoWindow(标记、地图、infoWindow、html、方向显示){
google.maps.event.addListener(标记'click',函数(){
setContent(html);
打开(地图、标记、html);
中心:位置;
directionsDisplay.setMap(空)
directionsDisplay.setDirections({routes:[]});
方向显示=空;
directionsDisplay=new google.maps.DirectionsRenderer();
directionsDisplay.setMap(地图)
var start=myLatLng;
变量纬度=marker.getPosition().lat().toFixed(6)
变量经度=marker.getPosition().lng().toFixed(6)
var end=new google.maps.LatLng(纬度、经度);
var请求={
来源:start,
目的地:完,
travelMode:google.maps.travelMode.DRIVING
};
路由(请求、功能(结果、状态){
if(status==google.maps.directionstatus.OK){
directionsDisplay.setMap(空)
方向显示.setMap(地图);
方向显示。设置方向(结果);
}
});
});
}
函数下载url(url,回调){
var请求=window.ActiveXObject?
新的ActiveXObject('Microsoft.XMLHTTP'):
新的XMLHttpRequest;
request.onreadystatechange=函数(){
if(request.readyState==4){
request.onreadystatechange=doNothing;
回调(请求、请求、状态);
}
};
打开('GET',url,true);
request.send();
}
函数doNothing(){}
}
从单击回调中删除此选项:
directionsDisplay = new google.maps.DirectionsRenderer();
此行始终创建一个新的DirectionsRenderer实例,但当您一次只想显示一个路由时,您只需要一个实例(该实例已在locate
中初始化)
使用单个实例时,无需清除任何内容。一个directionsRenderer将永远不会显示超过1条路由,只要调用setDirections,先前绘制的路由将自动删除。从单击回调中删除此路由:
directionsDisplay = new google.maps.DirectionsRenderer();
此行始终创建一个新的DirectionsRenderer实例,但当您一次只想显示一个路由时,您只需要一个实例(该实例已在locate
中初始化)
那里有