[gnome-maps] MapView: Add signal for tracking view movements

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 7668e861449077419ed0db61a6f0f8532350b265
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Wed Apr 17 17:04:00 2013 +0300

    MapView: Add signal for tracking view movements

 src/mapView.js | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/src/mapView.js b/src/mapView.js
index 122831e..c854dcf 100644
--- a/src/mapView.js
+++ b/src/mapView.js
@@ -58,6 +58,9 @@ const MapView = new Lang.Class({
         this.view = this.actor;
         this.view.set_zoom_level(3);
 
+        this.view.connect('notify::latitude', Lang.bind(this, this._onViewMoved));
+        this.view.connect('notify::longitude', Lang.bind(this, this._onViewMoved));
+
         this._properties = new Properties.Properties(this);
         this.view.bin_layout_add(this._properties.actor,
                                  Clutter.BinAlignment.FILL,
@@ -191,5 +194,9 @@ const MapView = new Lang.Class({
         else
             this.ensureVisible(locations);
     },
+
+    _onViewMoved: function() {
+        this.emit('view-moved');
+    },
 });
 Signals.addSignalMethods(MapView.prototype);