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以下代码显示地图中的两个点并绘制这些点之间的驾驶路径。我想要实现的是当我移动一个点时,它应该移动标记并重新绘制路径。我怎样才能做到这一点?我很欣赏任何提示。谢谢。移动标记并通过移动Google地图重绘路径
function mapLocation() {
var directionsDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
var istanbul = new google.maps.LatLng(41.015137, 28.979530);
var mapOptions = {
zoom: 7,
center: istanbul
};
map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
directionsDisplay.setMap(map);
calcRoute();
}
function calcRoute() {
var start = new google.maps.LatLng(41.01524, 28.975994);
//var end = new google.maps.LatLng(38.334818, -181.884886);
var end = new google.maps.LatLng(41.013232, 28.978676);
var request = {
origin: start,
destination: end,
travelMode: google.maps.TravelMode.DRIVING
};
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
directionsDisplay.setMap(map);
} else {
alert("Directions Request from " + start.toUrlValue(6) + " to " + end.toUrlValue(6) + " failed: " + status);
}
});
}
google.maps.event.addDomListener(window, 'load', initialize);
}
mapLocation();
一个问题:当我更改一个点的位置时,如何检测点之间的距离?加载这段代码有助于:'alert(response.routes [0] .legs [0] .distance.value +“meters”);'但是当点的位置改变时它什么都不做。 – jason
更确切地说,我如何检测点的新位置?谢谢。 – jason
[DirectionsRenderer](https://developers.google.com/maps/documentation/javascript/3.exp/reference?hl=fr#DirectionsRenderer)有一个'directions_changed'事件,当渲染的方向改变时会触发*,无论何时设置了新的DirectionsResult,或者用户完成将更改拖至路线路径时。* – MrUpsidown