我希望用户在 GoogleMaps 上用折线绘制路线。我找到了一种捕捉折线的方法(链接中的示例,下面的代码)。该代码与方向服务一起在道路上绘制折线,唯一的问题是这只适用于 G_TRAVELMODE_DRIVING 但我想使用 G_TRAVELMODE_WALKING 并且当您使用 WALKING 时,您必须在方向的构造函数中提供地图和 div目的。当我这样做时,它会自动删除最后一行,只显示当前行。我尝试了几件事,例如将地图提供为空,或在构造函数中省略地图。我还尝试在构造函数中提供第二张地图,从路线服务中获取折线并将它们显示在右侧地图。但没有任何效果!如果有人可以帮助我,我将不胜感激!
http://econym.org.uk/gmap/example_snappath.htm
if (GBrowserIsCompatible()) {
var map = new GMap2(document.getElementById("map"));
map.setCenter(new GLatLng(53.7877, -2.9832),13)
map.addControl(new GLargeMapControl());
map.addControl(new GMapTypeControl());
var dirn = new GDirections();
var firstpoint = true;
var gmarkers = [];
var gpolys = [];
var dist = 0;
GEvent.addListener(map, "click", function(overlay,point) {
// == When the user clicks on a the map, get directiobns from that point to itself ==
if (!overlay) {
if (firstpoint) {
dirn.loadFromWaypoints([point.toUrlValue(6),point.toUrlValue(6)],{getPolyline:true});
} else {
dirn.loadFromWaypoints([gmarkers[gmarkers.length-1].getPoint(),point.toUrlValue(6)],{getPolyline:true});
}
}
});
// == when the load event completes, plot the point on the street ==
GEvent.addListener(dirn,"load", function() {
// snap to last vertex in the polyline
var n = dirn.getPolyline().getVertexCount();
var p=dirn.getPolyline().getVertex(n-1);
var marker=new GMarker(p);
map.addOverlay(marker);
// store the details
gmarkers.push(marker);
if (!firstpoint) {
map.addOverlay(dirn.getPolyline());
gpolys.push(dirn.getPolyline());
dist += dirn.getPolyline().Distance();
document.getElementById("distance").innerHTML="Path length: "+(dist/1000).toFixed(2)+" km. "+(dist/1609.344).toFixed(2)+" miles.";
}
firstpoint = false;
});
GEvent.addListener(dirn,"error", function() {
GLog.write("Failed: "+dirn.getStatus().code);
});
}
else {
alert("Sorry, the Google Maps API is not compatible with this browser");
}