Added selected_index property to TabView

IPython/html/static/notebook/js/widgets/multicontainer.js

@@ -64,6 +64,7 b' require(["notebook/js/widget"], function(){'
         render: function(){
             this.$el = $('<div />');
             var uuid = IPython.utils.uuid();
+            var that = this;
             this.$tabs = $('<div />', {id: uuid})
                 .addClass('nav')
                 .addClass('nav-tabs')
@@ -85,6 +86,11 b' require(["notebook/js/widget"], function(){'
                 }
             }
 
+            var selected_index = this.model.get('selected_index');
+            if (0 <= selected_index && selected_index < this.containers.length) {
+                this.select_page(selected_index);
+            }
+
             return IPython.WidgetView.prototype.update.call(this);
         },
 
@@ -103,8 +109,9 b' require(["notebook/js/widget"], function(){'
                 .html('Page ' + index)
                 .appendTo(tab)
                 .click(function (e) {
-                    that.$tabs.find('li')
-                        .removeClass('active');
+                    that.model.set("selected_index", index);
+                    that.model.update_other_views(that);
+                    that.select_page(index);
                 });
             this.containers.push(tab_text);
 
@@ -119,6 +126,12 b' require(["notebook/js/widget"], function(){'
             }
             this.update();
         },
+
+        select_page: function(index) {
+            this.$tabs.find('li')
+                .removeClass('active');
+            this.containers[index].tab('show');
+        },
     });
 
     IPython.notebook.widget_manager.register_widget_view('TabView', TabView);

IPython/html/widgets/widget_multicontainer.py

@@ -15,7 +15,7 b' pages.'
 # Imports
 #-----------------------------------------------------------------------------
 from widget import Widget
-from IPython.utils.traitlets import Unicode, Dict
+from IPython.utils.traitlets import Unicode, Dict, Int
 
 #-----------------------------------------------------------------------------
 # Classes
@@ -25,8 +25,9 b' class MulticontainerWidget(Widget):'
     default_view_name = Unicode('TabView')
 
     # Keys
-    _keys = ['_titles']
+    _keys = ['_titles', 'selected_index']
     _titles = Dict(help="Titles of the pages")
+    selected_index = Int(0)
 
     # Public methods
     def set_title(self, index, title):