From dfb7069237646b77d8517afb1bc3c675cebe6d67 Mon Sep 17 00:00:00 2001
From: Fabrizio Fortunato <fortune@cortesconta.net>
Date: Tue, 27 Jan 2015 14:58:14 +0100
Subject: [PATCH] add support ffor back button when the drawer is open

---
 ionic.contrib.drawer.js | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/ionic.contrib.drawer.js b/ionic.contrib.drawer.js
index b2f5815..8993b4f 100644
--- a/ionic.contrib.drawer.js
+++ b/ionic.contrib.drawer.js
@@ -9,12 +9,15 @@
  */
 angular.module('ionic.contrib.drawer', ['ionic'])
 
-.controller('drawerCtrl', ['$element', '$attrs', '$ionicGesture', '$document', function($element, $attr, $ionicGesture, $document) {
+.controller('drawerCtrl', ['$element', '$attrs', '$ionicGesture', '$document', '$ionicPlatform', function($element, $attr, $ionicGesture, $document, $ionicPlatform) {
   var el = $element[0];
   var dragging = false;
   var startX, lastX, offsetX, newX;
   var side;
 
+  // Handle back button
+  var unregisterBackAction;
+
   // How far to drag before triggering
   var thresholdX = 15;
   // How far from edge before triggering
@@ -106,7 +109,7 @@ angular.module('ionic.contrib.drawer', ['ionic'])
           startTargetDrag(e);
         } else if(startX < edgeX) {
           startDrag(e);
-        } 
+        }
       }
     } else {
       console.log(lastX, offsetX, lastX - offsetX);
@@ -132,6 +135,10 @@ angular.module('ionic.contrib.drawer', ['ionic'])
     doEndDrag(e);
   }, $document);
 
+  var hardwareBackCallback = function() {
+    this.close();
+  }.bind(this);
+
 
   this.close = function() {
     enableAnimation();
@@ -142,6 +149,9 @@ angular.module('ionic.contrib.drawer', ['ionic'])
         el.style.transform = el.style.webkitTransform = 'translate3d(100%, 0, 0)';
       }
     });
+    if (unregisterBackAction) {
+        unregisterBackAction();
+    }
   };
 
   this.open = function() {
@@ -153,6 +163,7 @@ angular.module('ionic.contrib.drawer', ['ionic'])
         el.style.transform = el.style.webkitTransform = 'translate3d(0%, 0, 0)';
       }
     });
+    unregisterBackAction = $ionicPlatform.registerBackButtonAction(hardwareBackCallback, 100);
   };
 }])