From 702cd2c8ea6226cb10ff5838df2f76f41466dde1 Mon Sep 17 00:00:00 2001
From: Torsten Dreyer <torsten@ŧ3r.de>
Date: Fri, 13 Feb 2015 16:50:29 +0100
Subject: [PATCH] Phi: draw aircraft trail on map widget

---
 webgui/widgets/map.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/webgui/widgets/map.js b/webgui/widgets/map.js
index bf5eeeb07..91d877405 100644
--- a/webgui/widgets/map.js
+++ b/webgui/widgets/map.js
@@ -110,6 +110,10 @@ define(
 
                 aircraftMarker.addTo(self.map);
 
+                var aircraftTrack = L.polyline([], {
+                    color : 'red'
+                }).addTo(self.map);
+
                 self.latitude = ko.observable(0).extend({
                     fgprop : 'latitude'
                 });
@@ -142,10 +146,18 @@ define(
                     rateLimit : 2000
                 });
 
+                self.aircraftTrailLength = 60;
+
                 self.mapCenter.subscribe(function(newValue) {
                     if (self.followAircraft()) {
                         self.map.setView(newValue);
                     }
+
+                    var trail = aircraftTrack.getLatLngs();
+                    while (trail.length > self.aircraftTrailLength)
+                        trail.shift();
+                    trail.push(newValue);
+                    aircraftTrack.setLatLngs(trail);
                 });
             }