[gnome-maps] transitPlan: Add a signal for no more alternatives

[Marcus Lundblad <mlundblad src gnome org>]

commit e15043c569c27bf8118681dbfe1fc2ff42cb34ae
Author: Marcus Lundblad <ml update uu se>
Date:   Wed Mar 22 22:01:00 2017 +0100

    transitPlan: Add a signal for no more alternatives
    
    This signal will be emitted when the user searches for
    later or earlier transit itineraries and none are found
    to intstruct the interface to retain previous results.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=780374

 src/transitPlan.js |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/transitPlan.js b/src/transitPlan.js
index 9d1848d..13c7cc1 100644
--- a/src/transitPlan.js
+++ b/src/transitPlan.js
@@ -90,6 +90,7 @@ const Plan = new Lang.Class({
     Signals: {
         'update': {},
         'reset': {},
+        'no-more-results': {},
         'itinerary-selected': { param_types: [GObject.TYPE_OBJECT] },
         'itinerary-deselected': {}
     },
@@ -120,6 +121,10 @@ const Plan = new Lang.Class({
         this.emit('reset');
     },
 
+    noMoreResults: function() {
+        this.emit('no-more-results');
+    },
+
     selectItinerary: function(itinerary) {
         this._selectedItinerary = itinerary;
         this.emit('itinerary-selected', itinerary);