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//----------------------------------------------------------------------------
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// Copyright (C) 2013 The IPython Development Team
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//
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// Distributed under the terms of the BSD License. The full license is in
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// the file COPYING, distributed as part of this software.
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//----------------------------------------------------------------------------
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//============================================================================
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// Widget and WidgetManager bases
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//============================================================================
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/**
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* Base Widget classes
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* @module IPython
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* @namespace IPython
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* @submodule widget
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*/
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var IPython = (function (IPython) {
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"use strict";
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//-----------------------------------------------------------------------
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// WidgetManager class
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//-----------------------------------------------------------------------
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var WidgetManager = function (kernel) {
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this.widgets = {};
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this.widget_types = {widget : Widget};
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if (kernel !== undefined) {
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this.init_kernel(kernel);
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}
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};
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WidgetManager.prototype.init_kernel = function (kernel) {
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this.kernel = kernel;
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var msg_types = ['widget_create', 'widget_destroy', 'widget_update'];
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for (var i = 0; i < msg_types.length; i++) {
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var msg_type = msg_types[i];
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kernel.register_iopub_handler(msg_type, $.proxy(this[msg_type], this));
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}
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};
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WidgetManager.prototype.register_widget_type = function (widget_type, constructor) {
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// Register a constructor for a given widget type name
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this.widget_types[widget_type] = constructor;
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};
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WidgetManager.prototype.widget_create = function (msg) {
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var content = msg.content;
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var constructor = this.widget_types[content.widget_type];
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if (constructor === undefined) {
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console.log("No such widget type registered: ", content.widget_type);
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console.log("Available widget types are: ", this.widget_types);
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return;
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}
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var widget = new constructor(this.kernel, content);
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this.widgets[content.widget_id] = widget;
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};
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WidgetManager.prototype.widget_destroy = function (msg) {
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var content = msg.content;
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var widget = this.widgets[content.widget_id];
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if (widget === undefined) {
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return;
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}
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delete this.widgets[content.widget_id];
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widget.handle_destroy(content.data);
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};
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WidgetManager.prototype.widget_update = function (msg) {
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var content = msg.content;
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var widget = this.widgets[content.widget_id];
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if (widget === undefined) {
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return;
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}
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widget.handle_update(content.data);
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};
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//-----------------------------------------------------------------------
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// Widget base class
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//-----------------------------------------------------------------------
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var Widget = function (kernel, content) {
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this.kernel = kernel;
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if (!content) return;
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this.widget_id = content.widget_id;
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this.handle_create(content.data);
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};
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Widget.prototype.handle_create = function (data) {
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};
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Widget.prototype.handle_update = function (data) {
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};
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Widget.prototype.handle_destroy = function (data) {
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};
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Widget.prototype.update = function (data) {
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var content = {
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widget_id : this.widget_id,
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data : data,
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};
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this.kernel.send_shell_message("widget_update", content);
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};
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Widget.prototype.destroy = function (data) {
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var content = {
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widget_id : this.widget_id,
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data : data,
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};
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this.kernel.send_shell_message("widget_destroy", content);
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};
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IPython.WidgetManager = WidgetManager;
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IPython.Widget = Widget;
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return IPython;
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}(IPython));
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