Correctly handle back button on start screens

On the inital screens the android back button should quit the app, or if
on the map screen and you've started a report it should cancel it. Add
in a default back method to FMSView and an override method for the map,
exising report and offline screens
Fixes #117

1 files changed, 8 insertions, 0 deletions

diff --git a/src/js/views/fms.js b/src/js/views/fms.js
index f60bf77..214dc2c 100644
--- a/src/js/views/fms.js
+++ b/src/js/views/fms.js
@@ -13,6 +13,14 @@
                 'vclick .ui-btn-right': 'onClickButtonNext'
             },
 
+            back: function(e) {
+                if ( this._back ) {
+                    this._back(e);
+                } else if ( this.prev ) {
+                    this.onClickButtonPrev(e);
+                }
+            },
+
             render: function(){
                 if ( !this.template ) {
                     console.log('no template to render');