fix callbacks error when we have intermidiate isolated scopes

Author: youknowriad

dist/angular-ui-tree.js

@@ -626,7 +626,7 @@
 
               // Fire dragStart callback
               scope.$apply(function () {
-                scope.$callbacks.dragStart(dragInfo.eventArgs(elements, pos));
+                scope.$treeScope.$callbacks.dragStart(dragInfo.eventArgs(elements, pos));
               });
 
               tagName = scope.$element.prop('tagName');
@@ -870,7 +870,7 @@
                 }
 
                 scope.$apply(function () {
-                  scope.$callbacks.dragMove(dragInfo.eventArgs(elements, pos));
+                  scope.$treeScope.$callbacks.dragMove(dragInfo.eventArgs(elements, pos));
                 });
               }
             };
@@ -880,7 +880,7 @@
 
               if (dragElm) {
                 scope.$treeScope.$apply(function () {
-                  scope.$callbacks.beforeDrop(dragInfo.eventArgs(elements, pos));
+                  scope.$treeScope.$callbacks.beforeDrop(dragInfo.eventArgs(elements, pos));
                 });
                 // roll back elements changed
                 hiddenPlaceElm.replaceWith(scope.$element);
@@ -891,13 +891,13 @@
                 if (scope.$$apply) {
                   scope.$treeScope.$apply(function () {
                     dragInfo.apply();
-                    scope.$callbacks.dropped(dragInfo.eventArgs(elements, pos));
+                    scope.$treeScope.$callbacks.dropped(dragInfo.eventArgs(elements, pos));
                   });
                 } else {
                   bindDrag();
                 }
                 scope.$treeScope.$apply(function () {
-                  scope.$callbacks.dragStop(dragInfo.eventArgs(elements, pos));
+                  scope.$treeScope.$callbacks.dragStop(dragInfo.eventArgs(elements, pos));
                 });
                 scope.$$apply = false;
                 dragInfo = null;