diff --git a/IPython/html/static/notebook/js/widget.js b/IPython/html/static/notebook/js/widget.js
new file mode 100644
index 000000000..dca305b28
--- /dev/null
+++ b/IPython/html/static/notebook/js/widget.js
@@ -0,0 +1,229 @@
+//----------------------------------------------------------------------------
+// Copyright (C) 2013 The IPython Development Team
+//
+// Distributed under the terms of the BSD License. The full license is in
+// the file COPYING, distributed as part of this software.
+//----------------------------------------------------------------------------
+
+//============================================================================
+// WidgetModel, WidgetView, and WidgetManager
+//============================================================================
+/**
+ * Base Widget classes
+ * @module IPython
+ * @namespace IPython
+ * @submodule widget
+ */
+
+
+// require(['components/underscore/underscore-min.js',
+// 'components/backbone/backbone-min.js'],
+
+var IPython = function (IPython) {
+ "use strict";
+
+ //-----------------------------------------------------------------------
+ // WidgetModel class
+ //-----------------------------------------------------------------------
+ var WidgetModel = Backbone.Model.extend({});
+
+
+ //-----------------------------------------------------------------------
+ // WidgetView class
+ //-----------------------------------------------------------------------
+ var WidgetView = Backbone.View.extend({
+
+ initialize: function() {
+ this.model.on('change',this.refresh,this);
+ },
+
+ refresh: function() {
+ this.update();
+
+ if (this.model.css != undefined) {
+ for (var selector in this.model.css) {
+ if (this.model.css.hasOwnProperty(selector)) {
+
+ // Get the elements via the css selector. If the selector is
+ // blank, assume the current element is the target.
+ var elements = this.$el.find(selector);
+ if (selector=='') {
+ elements = this.$el;
+ }
+
+ // Apply the css traits to all elements that match the selector.
+ if (elements.length>0){
+ var css_traits = this.model.css[selector];
+ for (var css_key in css_traits) {
+ if (css_traits.hasOwnProperty(css_key)) {
+ elements.css(css_key, css_traits[css_key]);
+ }
+ }
+ }
+ }
+ }
+ }
+ },
+ });
+
+
+ //-----------------------------------------------------------------------
+ // WidgetManager class
+ //-----------------------------------------------------------------------
+ // Public constructor
+ var WidgetManager = function(comm_manager){
+ this.comm_manager = comm_manager;
+ this.widget_model_types = {};
+ this.widget_view_types = {};
+ this.model_widget_views = {};
+
+ var that = this;
+ Backbone.sync = function(method, model, options, error) {
+ var result = that.send_sync(method, model);
+ if (options.success) {
+ options.success(result);
+ }
+ };
+ }
+
+ // Register a widget model type.
+ WidgetManager.prototype.register_widget_model = function (widget_model_name, widget_model_type) {
+
+ // Register the widget with the comm manager. Make sure to pass this object's context
+ // in so `this` works in the call back.
+ this.comm_manager.register_target(widget_model_name, $.proxy(this.handle_com_open, this));
+
+ // Register the types of the model and view correspong to this widget type. Later
+ // the widget manager will initialize these when the comm is opened.
+ this.widget_model_types[widget_model_name] = widget_model_type;
+ }
+
+ // Register a widget view type.
+ WidgetManager.prototype.register_widget_view = function (widget_view_name, widget_view_type) {
+ this.widget_view_types[widget_view_name] = widget_view_type;
+ }
+
+ // Handle when a comm is opened.
+ WidgetManager.prototype.handle_com_open = function (comm, msg) {
+ var widget_type_name = msg.content.target_name;
+
+ // Create the corresponding widget model.
+ var widget_model = new this.widget_model_types[widget_type_name];
+
+ // Remember comm associated with the model.
+ widget_model.comm = comm;
+ comm.model = widget_model;
+
+ // Create an array to remember the views associated with the model.
+ widget_model.views = [];
+
+ // Add a handle to delete the control when the comm is closed.
+ var that = this;
+ var handle_close = function(msg) {
+ that.handle_comm_closed(comm, msg);
+ }
+ comm.on_close(handle_close);
+
+ // Handle incomming messages.
+ var handle_msg = function(msg) {
+ that.handle_comm_msg(comm, msg);
+ }
+ comm.on_msg(handle_msg);
+ }
+
+ // Create view that represents the model.
+ WidgetManager.prototype.show_view = function (widget_area, widget_model, widget_view_name) {
+ var widget_view = new this.widget_view_types[widget_view_name]({model: widget_model});
+ widget_view.render();
+ widget_model.views.push(widget_view);
+
+ // Add the view's element to cell's widget div.
+ widget_area
+ .append($("").append(widget_view.$el));
+
+ // Update the view based on the model contents.
+ widget_view.refresh();
+ }
+
+ // Handle incomming comm msg.
+ WidgetManager.prototype.handle_comm_msg = function (comm, msg) {
+ // Different logic for different methods.
+ var method = msg.content.data.method;
+ switch (method){
+ case 'show':
+
+ // TODO: Get cell from registered output handler.
+ var cell = IPython.notebook.get_cell(IPython.notebook.get_selected_index()-1);
+ var widget_subarea = cell.element.find('.widget_area').find('.widget_subarea');
+
+ if (msg.content.data.parent != undefined) {
+ var find_results = widget_subarea.find("." + msg.content.data.parent);
+ if (find_results.length > 0) {
+ widget_subarea = find_results;
+ }
+ }
+
+ this.show_view(widget_subarea, comm.model, msg.content.data.view_name);
+ break;
+ case 'update':
+ this.handle_update(comm, msg.content.data.state);
+ break;
+ }
+ }
+
+ // Handle when a widget is updated via the python side.
+ WidgetManager.prototype.handle_update = function (comm, state) {
+ for (var key in state) {
+ if (state.hasOwnProperty(key)) {
+ if (key=="_css"){
+ comm.model.css = state[key];
+ } else {
+ comm.model.set(key, state[key]);
+ }
+ }
+ }
+ comm.model.save();
+ }
+
+ // Handle when a widget is closed.
+ WidgetManager.prototype.handle_comm_closed = function (comm, msg) {
+ for (var view_index in comm.model.views) {
+ var view = comm.model.views[view_index];
+ view.remove();
+ }
+ }
+
+ // Get the cell output area corresponding to the comm.
+ WidgetManager.prototype._get_comm_outputarea = function (comm) {
+ // TODO: get element from comm instead of guessing
+ var cell = IPython.notebook.get_cell(IPython.notebook.get_selected_index())
+ return cell.output_area;
+ }
+
+ // Send widget state to python backend.
+ WidgetManager.prototype.send_sync = function (method, model) {
+
+ // Create a callback for the output if the widget has an output area associate with it.
+ var callbacks = {};
+ var comm = model.comm;
+ var outputarea = this._get_comm_outputarea(comm);
+ if (outputarea != null) {
+ callbacks = {
+ iopub : {
+ output : $.proxy(outputarea.handle_output, outputarea),
+ clear_output : $.proxy(outputarea.handle_clear_output, outputarea)}
+ };
+ };
+
+ var data = {sync_method: method, sync_data: model.toJSON()};
+ comm.send(data, callbacks);
+ return data;
+ }
+
+ IPython.WidgetManager = WidgetManager;
+ IPython.WidgetModel = WidgetModel;
+ IPython.WidgetView = WidgetView;
+
+ return IPython;
+
+};