当鼠标悬停在行驶路线上时显示警报 [英] show alert on mouse over of driving route
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问题描述
当我将鼠标悬停在行驶路线上时，警报不会显示，
有人可以帮我吗?
我尝试了所有事情，但无法将鼠标移到路线上.
Alert is not showing when I mouse over on driving route,
can any body help me?
I tried every thing but not works on driving route mouse over.
注意:我是在将鼠标移到折线上而不是在折线上的时候这样做的.
Note: I am doing this on driving route mouse over not on polyline.
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Travel modes in directions</title>
<link href="http://code.google.com//apis/maps/documentation/javascript/examples/default.css" rel="stylesheet">
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<script>
var directionsDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
var haight = new google.maps.LatLng(37.7699298, -122.4469157);
var oceanBeach = new google.maps.LatLng(37.7683909618184, -122.51089453697205);
function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
var mapOptions = {
zoom: 14,
mapTypeId: google.maps.MapTypeId.ROADMAP,
center: haight
}
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
directionsDisplay.setMap(map);
}
var points=[];
function calcRoute() {
var selectedMode = document.getElementById('mode').value;
var request = {
origin: haight,
destination: oceanBeach,
// Note that Javascript allows us to access the constant
// using square brackets and a string value as its
// "property."
travelMode: google.maps.TravelMode[selectedMode]
};
directionsService.route(request, function(response, status) {
var myRoute = response.routes[0].legs[0];
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
for (var i = 0; i < myRoute.steps.length; i++) {
for (var j = 0; j < myRoute.steps[i].lat_lngs.length; j++) {
points.push(myRoute.steps[i].lat_lngs[j]);
}
}
}
});
alert("points "+points);
var eventLine = new google.maps.Polyline({
path: points,
visible: true,
strokeOpacity: 0,
zIndex: 1000
});
eventLine.setMap(map);
google.maps.event.addListener(eventLine, "mouseover", function() {
alert("hi")
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="panel">
<b>Mode of Travel: </b>
<select id="mode" onchange="calcRoute();">
<option value="DRIVING">Driving</option>
<option value="WALKING">Walking</option>
<option value="BICYCLING">Bicycling</option>
<option value="TRANSIT">Transit</option>
</select>
</div>
<div id="map-canvas"></div>
</body>
</html>
推荐答案
DirectionsService 没有鼠标悬停事件， Polyline 有.如果将折线创建移动到DirectionsService回调中，那么您的代码对我有用:
The DirectionsService doesn't have a mouseover event, a Polyline does. Your code works for me if I move the polyline creation into the DirectionsService callback:
http://www.geocodezip.com/v3_SO_directionsMouseOver.html
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Travel modes in directions</title>
<link href="http://code.google.com//apis/maps/documentation/javascript/examples/default.css" rel="stylesheet">
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<script>
var directionsDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
var haight = new google.maps.LatLng(37.7699298, -122.4469157);
var oceanBeach = new google.maps.LatLng(37.7683909618184, -122.51089453697205);
function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
var mapOptions = {
zoom: 14,
mapTypeId: google.maps.MapTypeId.ROADMAP,
center: haight
}
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
directionsDisplay.setMap(map);
calcRoute();
}
var points=[];
function calcRoute() {
var selectedMode = document.getElementById('mode').value;
var request = {
origin: haight,
destination: oceanBeach,
// Note that Javascript allows us to access the constant
// using square brackets and a string value as its
// "property."
travelMode: google.maps.TravelMode[selectedMode]
};
directionsService.route(request, function(response, status) {
var myRoute = response.routes[0].legs[0];
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
for (var i = 0; i < myRoute.steps.length; i++) {
for (var j = 0; j < myRoute.steps[i].lat_lngs.length; j++) {
points.push(myRoute.steps[i].lat_lngs[j]);
}
}
// alert("points "+points);
var eventLine = new google.maps.Polyline({
path: points,
visible: true,
strokeOpacity: 0,
zIndex: 1000
});
eventLine.setMap(map);
google.maps.event.addListener(eventLine, "mouseover", function() {
alert("hi")
});
} else { alert("Directions request failed: "+status); }
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="panel">
<b>Mode of Travel: </b>
<select id="mode" onchange="calcRoute();">
<option value="DRIVING">Driving</option>
<option value="WALKING">Walking</option>
<option value="BICYCLING">Bicycling</option>
<option value="TRANSIT">Transit</option>
</select>
</div>
<div id="map-canvas"></div>
</body>
</html>
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