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 GTFS.Data.Trip.prototype.verify = function(callback, force){
if(this.programmedShapes && !force) {
if(callback) callback(true);
return;
}
var dir = new GDirections();
if(this.programmedShapes) this.programmedShapes.hide();
this.programmedShapes = new GTFS.Data.Shape();
this.programmedShapes.addStoptimes(this.stoptimes);
var idx = 0;
var self = this;
function onDirSuccess(){
var leg = new GTFS.Data.Leg();
var start = self.stoptimes[idx].marker.getLatLng();
var end = self.stoptimes[idx + 1].marker.getLatLng();
var points = [];
var pol = this.getPolyline();
var count = pol.getVertexCount();
points.push({'lat': start.lat(), 'lng': start.lng()});
for (var i = 0; i < count - 1; i++) {
var point = pol.getVertex(i);
points.push({'lat': point.lat(), 'lng': point.lng()});
}
points.push({'lat': end.lat(), 'lng': end.lng()});
var color = GTFS.Data.Trip.colors.programmed;
leg.setData(points, color);
leg.show();
self.stoptimes[idx + 1].preVerifyLeg = leg;
self.stoptimes[idx].sufVerifyLeg = leg;
self.programmedShapes.addLeg(leg);
if(idx == self.stoptimes.length - 2) {
if(callback) callback(true, idx);
}  else {
idx++;
setTimeout(startDir, 100);  //发现不加上timeout很容易就出错
//startDir();  

}
}

function onDirFailure(){
self.programmedShapes.hideLegs();
self.programmedShapes = null;
idx = 0;
if(callback) callback(false, idx);
}

function startDir(){
var start = self.stoptimes[idx];
var end = self.stoptimes[idx + 1];
var query = "from: " + start.getQuery() + " to: " + end.getQuery();
dir.load(query, {
getPolyline: true
});

}

GEvent.addListener(dir, 'load', onDirSuccess);
GEvent.addListener(dir, 'error', onDirFailure);
startDir();
}