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1 | 1 | { |
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2 | 2 | "cells": [ |
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3 | 3 | { |
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4 | 4 | "cell_type": "markdown", |
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5 | 5 | "metadata": {}, |
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6 | 6 | "source": [ |
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7 | 7 | "Before reading, make sure to review\n", |
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8 | 8 | "\n", |
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9 | 9 | "- [MVC prgramming](http://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93controller)\n", |
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10 | 10 | "- [Backbone.js](https://www.codeschool.com/courses/anatomy-of-backbonejs)\n", |
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11 | 11 | "- [The widget IPEP](https://github.com/ipython/ipython/wiki/IPEP-23%3A-Backbone.js-Widgets)\n", |
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12 | 12 | "- [The original widget PR discussion](https://github.com/ipython/ipython/pull/4374)" |
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13 | 13 | ] |
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14 | 14 | }, |
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15 | 15 | { |
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16 | 16 | "cell_type": "code", |
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17 |
"execution_count": |
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17 | "execution_count": null, | |
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18 | 18 | "metadata": { |
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19 | 19 | "collapsed": false |
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20 | 20 | }, |
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21 | 21 | "outputs": [], |
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22 | 22 | "source": [ |
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23 | 23 | "from __future__ import print_function # For py 2.7 compat\n", |
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24 | 24 | "\n", |
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25 | 25 | "from IPython.html import widgets # Widget definitions\n", |
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26 | 26 | "from IPython.display import display # Used to display widgets in the notebook\n", |
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27 | 27 | "from IPython.utils.traitlets import Unicode # Used to declare attributes of our widget" |
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28 | 28 | ] |
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29 | 29 | }, |
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30 | 30 | { |
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31 | 31 | "cell_type": "markdown", |
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32 | 32 | "metadata": {}, |
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33 | 33 | "source": [ |
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34 | 34 | "# Abstract" |
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35 | 35 | ] |
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36 | 36 | }, |
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37 | 37 | { |
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38 | 38 | "cell_type": "markdown", |
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39 | 39 | "metadata": {}, |
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40 | 40 | "source": [ |
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41 | 41 | "This notebook implements a custom date picker widget,\n", |
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42 | 42 | "in order to demonstrate the widget creation process.\n", |
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43 | 43 | "\n", |
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44 | 44 | "To create a custom widget, both Python and JavaScript code is required." |
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45 | 45 | ] |
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46 | 46 | }, |
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47 | 47 | { |
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48 | 48 | "cell_type": "markdown", |
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49 | 49 | "metadata": {}, |
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50 | 50 | "source": [ |
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51 | 51 | "# Section 1 - Basics" |
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52 | 52 | ] |
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53 | 53 | }, |
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54 | 54 | { |
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55 | 55 | "cell_type": "markdown", |
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56 | 56 | "metadata": {}, |
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57 | 57 | "source": [ |
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58 | 58 | "## Python" |
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59 | 59 | ] |
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60 | 60 | }, |
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61 | 61 | { |
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62 | 62 | "cell_type": "markdown", |
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63 | 63 | "metadata": {}, |
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64 | 64 | "source": [ |
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65 | 65 | "When starting a project like this, it is often easiest to make a simple base implementation,\n", |
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66 | 66 | "to verify that the underlying framework is working as expected.\n", |
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67 | 67 | "To start, we will create an empty widget and make sure that it can be rendered.\n", |
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68 | 68 | "The first step is to define the widget in Python." |
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69 | 69 | ] |
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70 | 70 | }, |
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71 | 71 | { |
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72 | 72 | "cell_type": "code", |
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73 |
"execution_count": |
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73 | "execution_count": null, | |
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74 | 74 | "metadata": { |
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75 | 75 | "collapsed": false |
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76 | 76 | }, |
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77 | 77 | "outputs": [], |
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78 | 78 | "source": [ |
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79 | 79 | "class DateWidget(widgets.DOMWidget):\n", |
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80 | 80 | " _view_name = Unicode('DatePickerView', sync=True)" |
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81 | 81 | ] |
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82 | 82 | }, |
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83 | 83 | { |
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84 | 84 | "cell_type": "markdown", |
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85 | 85 | "metadata": {}, |
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86 | 86 | "source": [ |
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87 | 87 | "Our widget inherits from `widgets.DOMWidget` since it is intended that it will be displayed in the notebook directly.\n", |
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88 | 88 | "The `_view_name` trait is special; the widget framework will read the `_view_name` trait to determine what Backbone view the widget is associated with.\n", |
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89 | 89 | "**Using `sync=True` is very important** because it tells the widget framework that that specific traitlet should be synced between the front- and back-ends." |
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90 | 90 | ] |
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91 | 91 | }, |
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92 | 92 | { |
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93 | 93 | "cell_type": "markdown", |
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94 | 94 | "metadata": {}, |
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95 | 95 | "source": [ |
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96 | 96 | "## JavaScript" |
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97 | 97 | ] |
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98 | 98 | }, |
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99 | 99 | { |
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100 | 100 | "cell_type": "markdown", |
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101 | 101 | "metadata": {}, |
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102 | 102 | "source": [ |
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103 | 103 | "In the IPython notebook [require.js](http://requirejs.org/) is used to load JavaScript dependencies.\n", |
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104 | 104 | "All IPython widget code depends on `widgets/js/widget.js`,\n", |
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105 | 105 | "where the base widget model and base view are defined.\n", |
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106 | 106 | "We use require.js to load this file:" |
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107 | 107 | ] |
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108 | 108 | }, |
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109 | 109 | { |
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110 | 110 | "cell_type": "code", |
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111 |
"execution_count": |
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111 | "execution_count": null, | |
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112 | 112 | "metadata": { |
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113 | 113 | "collapsed": false |
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114 | 114 | }, |
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115 | "outputs": [ | |
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116 | { | |
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117 | "data": { | |
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118 | "application/javascript": [ | |
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119 | "\n", | |
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120 | "require([\"widgets/js/widget\"], function(WidgetManager){\n", | |
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121 | "\n", | |
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122 | "});" | |
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123 | ], | |
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124 | "text/plain": [ | |
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125 | "<IPython.core.display.Javascript at 0x109491690>" | |
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126 | ] | |
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127 | }, | |
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128 | "metadata": {}, | |
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129 | "output_type": "display_data" | |
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130 | } | |
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131 | ], | |
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115 | "outputs": [], | |
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132 | 116 | "source": [ |
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133 | 117 | "%%javascript\n", |
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134 | 118 | "\n", |
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135 | 119 | "require([\"widgets/js/widget\"], function(WidgetManager){\n", |
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136 | 120 | "\n", |
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137 | 121 | "});" |
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138 | 122 | ] |
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139 | 123 | }, |
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140 | 124 | { |
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141 | 125 | "cell_type": "markdown", |
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142 | 126 | "metadata": {}, |
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143 | 127 | "source": [ |
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144 | 128 | "Now we need to define a view that can be used to represent the model.\n", |
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145 | 129 | "To do this, the `IPython.DOMWidgetView` is extended.\n", |
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146 | 130 | "**A render function must be defined**.\n", |
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147 | 131 | "The render function is used to render a widget view instance to the DOM.\n", |
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148 | 132 | "For now, the render function renders a div that contains the text *Hello World!*\n", |
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149 | "Lastly, the view needs to be registered with the widget manager.\n", | |
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133 | "Lastly, the view needs to be registered with the widget manager, for which we need to load another module.\n", | |
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150 | 134 | "\n", |
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151 | 135 | "**Final JavaScript code below:**" |
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152 | 136 | ] |
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153 | 137 | }, |
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154 | 138 | { |
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155 | 139 | "cell_type": "code", |
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156 |
"execution_count": |
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140 | "execution_count": null, | |
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157 | 141 | "metadata": { |
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158 | 142 | "collapsed": false |
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159 | 143 | }, |
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160 | "outputs": [ | |
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161 | { | |
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162 | "data": { | |
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163 | "application/javascript": [ | |
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164 | "\n", | |
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165 | "require([\"widgets/js/widget\"], function(WidgetManager){\n", | |
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166 | " \n", | |
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167 | " // Define the DatePickerView\n", | |
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168 | " var DatePickerView = IPython.DOMWidgetView.extend({\n", | |
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169 | " render: function(){ this.$el.text('Hello World!'); },\n", | |
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170 | " });\n", | |
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171 | " \n", | |
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172 | " // Register the DatePickerView with the widget manager.\n", | |
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173 | " WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
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174 | "});" | |
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175 | ], | |
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176 | "text/plain": [ | |
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177 | "<IPython.core.display.Javascript at 0x1094917d0>" | |
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178 | ] | |
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179 | }, | |
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180 | "metadata": {}, | |
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181 | "output_type": "display_data" | |
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182 | } | |
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183 | ], | |
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144 | "outputs": [], | |
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184 | 145 | "source": [ |
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185 | 146 | "%%javascript\n", |
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186 | 147 | "\n", |
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187 |
"require([\"widgets/js/widget\"], function( |
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148 | "require([\"widgets/js/widget\", \"widgets/js/manager\"], function(widget, manager){\n", | |
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188 | 149 | " \n", |
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189 | 150 | " // Define the DatePickerView\n", |
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190 |
" var DatePickerView = |
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151 | " var DatePickerView = widget.DOMWidgetView.extend({\n", | |
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191 | 152 | " render: function(){ this.$el.text('Hello World!'); },\n", |
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192 | 153 | " });\n", |
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193 | 154 | " \n", |
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194 | 155 | " // Register the DatePickerView with the widget manager.\n", |
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195 | " WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
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156 | " manager.WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
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196 | 157 | "});" |
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197 | 158 | ] |
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198 | 159 | }, |
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199 | 160 | { |
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200 | 161 | "cell_type": "markdown", |
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201 | 162 | "metadata": {}, |
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202 | 163 | "source": [ |
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203 | 164 | "## Test" |
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204 | 165 | ] |
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205 | 166 | }, |
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206 | 167 | { |
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207 | 168 | "cell_type": "markdown", |
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208 | 169 | "metadata": {}, |
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209 | 170 | "source": [ |
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210 | 171 | "To test what we have so far, create the widget, just like you would the builtin widgets:" |
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211 | 172 | ] |
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212 | 173 | }, |
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213 | 174 | { |
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214 | 175 | "cell_type": "code", |
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215 |
"execution_count": |
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176 | "execution_count": null, | |
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216 | 177 | "metadata": { |
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217 | 178 | "collapsed": false |
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218 | 179 | }, |
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219 | 180 | "outputs": [], |
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220 | 181 | "source": [ |
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221 | 182 | "DateWidget()" |
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222 | 183 | ] |
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223 | 184 | }, |
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224 | 185 | { |
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225 | 186 | "cell_type": "markdown", |
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226 | 187 | "metadata": {}, |
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227 | 188 | "source": [ |
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228 | 189 | "# Section 2 - Something useful" |
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229 | 190 | ] |
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230 | 191 | }, |
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231 | 192 | { |
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232 | 193 | "cell_type": "markdown", |
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233 | 194 | "metadata": {}, |
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234 | 195 | "source": [ |
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235 | 196 | "## Python" |
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236 | 197 | ] |
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237 | 198 | }, |
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238 | 199 | { |
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239 | 200 | "cell_type": "markdown", |
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240 | 201 | "metadata": {}, |
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241 | 202 | "source": [ |
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242 | 203 | "In the last section we created a simple widget that displayed *Hello World!*\n", |
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243 | 204 | "To make an actual date widget, we need to add a property that will be synced between the Python model and the JavaScript model.\n", |
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244 | 205 | "The new attribute must be a traitlet, so the widget machinery can handle it.\n", |
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245 | 206 | "The traitlet must be constructed with a `sync=True` keyword argument, to tell the widget machinery knows to synchronize it with the front-end.\n", |
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246 | 207 | "Adding this to the code from the last section:" |
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247 | 208 | ] |
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248 | 209 | }, |
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249 | 210 | { |
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250 | 211 | "cell_type": "code", |
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251 |
"execution_count": |
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212 | "execution_count": null, | |
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252 | 213 | "metadata": { |
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253 | 214 | "collapsed": false |
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254 | 215 | }, |
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255 | 216 | "outputs": [], |
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256 | 217 | "source": [ |
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257 | 218 | "class DateWidget(widgets.DOMWidget):\n", |
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258 | 219 | " _view_name = Unicode('DatePickerView', sync=True)\n", |
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259 | 220 | " value = Unicode(sync=True)" |
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260 | 221 | ] |
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261 | 222 | }, |
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262 | 223 | { |
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263 | 224 | "cell_type": "markdown", |
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264 | 225 | "metadata": {}, |
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265 | 226 | "source": [ |
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266 | 227 | "## JavaScript" |
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267 | 228 | ] |
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268 | 229 | }, |
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269 | 230 | { |
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270 | 231 | "cell_type": "markdown", |
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271 | 232 | "metadata": {}, |
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272 | 233 | "source": [ |
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273 | 234 | "In the JavaScript, there is no need to define counterparts to the traitlets.\n", |
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274 | 235 | "When the JavaScript model is created for the first time,\n", |
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275 | 236 | "it copies all of the traitlet `sync=True` attributes from the Python model.\n", |
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276 | 237 | "We need to replace *Hello World!* with an actual HTML date picker widget." |
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277 | 238 | ] |
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278 | 239 | }, |
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279 | 240 | { |
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280 | 241 | "cell_type": "code", |
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281 |
"execution_count": |
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242 | "execution_count": null, | |
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282 | 243 | "metadata": { |
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283 | 244 | "collapsed": false |
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284 | 245 | }, |
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285 | "outputs": [ | |
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286 | { | |
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287 | "data": { | |
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288 | "application/javascript": [ | |
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289 | "\n", | |
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290 | "require([\"widgets/js/widget\"], function(WidgetManager){\n", | |
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291 | " \n", | |
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292 | " // Define the DatePickerView\n", | |
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293 | " var DatePickerView = IPython.DOMWidgetView.extend({\n", | |
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294 | " render: function(){\n", | |
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295 | " \n", | |
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296 | " // Create the date picker control.\n", | |
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297 | " this.$date = $('<input />')\n", | |
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298 | " .attr('type', 'date')\n", | |
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299 | " .appendTo(this.$el);\n", | |
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300 | " },\n", | |
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301 | " });\n", | |
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302 | " \n", | |
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303 | " // Register the DatePickerView with the widget manager.\n", | |
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304 | " WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
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305 | "});" | |
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306 | ], | |
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307 | "text/plain": [ | |
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308 | "<IPython.core.display.Javascript at 0x109491750>" | |
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309 | ] | |
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310 | }, | |
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311 | "metadata": {}, | |
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312 | "output_type": "display_data" | |
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313 | } | |
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314 | ], | |
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246 | "outputs": [], | |
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315 | 247 | "source": [ |
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316 | 248 | "%%javascript\n", |
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317 | 249 | "\n", |
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318 |
"require([\"widgets/js/widget\"], function( |
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250 | "require([\"widgets/js/widget\", \"widgets/js/manager\"], function(widget, manager){\n", | |
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319 | 251 | " \n", |
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320 | 252 | " // Define the DatePickerView\n", |
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321 |
" var DatePickerView = |
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253 | " var DatePickerView = widget.DOMWidgetView.extend({\n", | |
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322 | 254 | " render: function(){\n", |
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323 | 255 | " \n", |
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324 | 256 | " // Create the date picker control.\n", |
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325 | 257 | " this.$date = $('<input />')\n", |
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326 | 258 | " .attr('type', 'date')\n", |
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327 | 259 | " .appendTo(this.$el);\n", |
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328 | 260 | " },\n", |
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329 | 261 | " });\n", |
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330 | 262 | " \n", |
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331 | 263 | " // Register the DatePickerView with the widget manager.\n", |
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332 | " WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
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264 | " manager.WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
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333 | 265 | "});" |
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334 | 266 | ] |
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335 | 267 | }, |
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336 | 268 | { |
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337 | 269 | "cell_type": "markdown", |
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338 | 270 | "metadata": {}, |
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339 | 271 | "source": [ |
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340 | 272 | "In order to get the HTML date picker to update itself with the value set in the back-end, we need to implement an `update()` method." |
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341 | 273 | ] |
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342 | 274 | }, |
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343 | 275 | { |
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344 | 276 | "cell_type": "code", |
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345 |
"execution_count": |
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277 | "execution_count": null, | |
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346 | 278 | "metadata": { |
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347 | 279 | "collapsed": false |
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348 | 280 | }, |
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349 | "outputs": [ | |
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350 | { | |
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351 | "data": { | |
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352 | "application/javascript": [ | |
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353 | "\n", | |
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354 | "require([\"widgets/js/widget\"], function(WidgetManager){\n", | |
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355 | " \n", | |
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356 | " // Define the DatePickerView\n", | |
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357 | " var DatePickerView = IPython.DOMWidgetView.extend({\n", | |
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358 | " render: function(){\n", | |
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359 | " \n", | |
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360 | " // Create the date picker control.\n", | |
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361 | " this.$date = $('<input />')\n", | |
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362 | " .attr('type', 'date')\n", | |
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363 | " .appendTo(this.$el);\n", | |
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364 | " },\n", | |
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365 | " \n", | |
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366 | " update: function() {\n", | |
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367 | " \n", | |
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368 | " // Set the value of the date control and then call base.\n", | |
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369 | " this.$date.val(this.model.get('value')); // ISO format \"YYYY-MM-DDTHH:mm:ss.sssZ\" is required\n", | |
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370 | " return DatePickerView.__super__.update.apply(this);\n", | |
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371 | " },\n", | |
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372 | " });\n", | |
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373 | " \n", | |
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374 | " // Register the DatePickerView with the widget manager.\n", | |
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375 | " WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
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376 | "});" | |
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377 | ], | |
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378 | "text/plain": [ | |
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379 | "<IPython.core.display.Javascript at 0x109491750>" | |
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380 | ] | |
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381 | }, | |
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382 | "metadata": {}, | |
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383 | "output_type": "display_data" | |
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384 | } | |
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385 | ], | |
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281 | "outputs": [], | |
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386 | 282 | "source": [ |
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387 | 283 | "%%javascript\n", |
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388 | 284 | "\n", |
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389 |
"require([\"widgets/js/widget\"], function( |
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285 | "require([\"widgets/js/widget\", \"widgets/js/manager\"], function(widget, manager){\n", | |
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390 | 286 | " \n", |
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391 | 287 | " // Define the DatePickerView\n", |
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392 |
" var DatePickerView = |
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288 | " var DatePickerView = widget.DOMWidgetView.extend({\n", | |
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393 | 289 | " render: function(){\n", |
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394 | 290 | " \n", |
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395 | 291 | " // Create the date picker control.\n", |
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396 | 292 | " this.$date = $('<input />')\n", |
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397 | 293 | " .attr('type', 'date')\n", |
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398 | 294 | " .appendTo(this.$el);\n", |
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399 | 295 | " },\n", |
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400 | 296 | " \n", |
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401 | 297 | " update: function() {\n", |
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402 | 298 | " \n", |
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403 | 299 | " // Set the value of the date control and then call base.\n", |
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404 | 300 | " this.$date.val(this.model.get('value')); // ISO format \"YYYY-MM-DDTHH:mm:ss.sssZ\" is required\n", |
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405 | 301 | " return DatePickerView.__super__.update.apply(this);\n", |
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406 | 302 | " },\n", |
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407 | 303 | " });\n", |
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408 | 304 | " \n", |
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409 | 305 | " // Register the DatePickerView with the widget manager.\n", |
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410 | " WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
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306 | " manager.WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
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411 | 307 | "});" |
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412 | 308 | ] |
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413 | 309 | }, |
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414 | 310 | { |
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415 | 311 | "cell_type": "markdown", |
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416 | 312 | "metadata": {}, |
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417 | 313 | "source": [ |
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418 | 314 | "To get the changed value from the frontend to publish itself to the backend,\n", |
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419 | 315 | "we need to listen to the change event triggered by the HTM date control and set the value in the model.\n", |
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420 | 316 | "After the date change event fires and the new value is set in the model,\n", |
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421 | 317 | "it is very important that we call `this.touch()` to let the widget machinery know which view changed the model.\n", |
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422 | 318 | "This is important because the widget machinery needs to know which cell to route the message callbacks to.\n", |
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423 | 319 | "\n", |
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424 | 320 | "**Final JavaScript code below:**" |
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425 | 321 | ] |
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426 | 322 | }, |
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427 | 323 | { |
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428 | 324 | "cell_type": "code", |
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429 |
"execution_count": |
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325 | "execution_count": null, | |
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430 | 326 | "metadata": { |
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431 | 327 | "collapsed": false |
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432 | 328 | }, |
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433 | "outputs": [ | |
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434 | { | |
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435 | "data": { | |
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436 | "application/javascript": [ | |
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437 | "\n", | |
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438 | "\n", | |
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439 | "require([\"widgets/js/widget\"], function(WidgetManager){\n", | |
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440 | " \n", | |
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441 | " // Define the DatePickerView\n", | |
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442 | " var DatePickerView = IPython.DOMWidgetView.extend({\n", | |
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443 | " render: function(){\n", | |
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444 | " \n", | |
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445 | " // Create the date picker control.\n", | |
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446 | " this.$date = $('<input />')\n", | |
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447 | " .attr('type', 'date')\n", | |
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448 | " .appendTo(this.$el);\n", | |
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449 | " },\n", | |
|
450 | " \n", | |
|
451 | " update: function() {\n", | |
|
452 | " \n", | |
|
453 | " // Set the value of the date control and then call base.\n", | |
|
454 | " this.$date.val(this.model.get('value')); // ISO format \"YYYY-MM-DDTHH:mm:ss.sssZ\" is required\n", | |
|
455 | " return DatePickerView.__super__.update.apply(this);\n", | |
|
456 | " },\n", | |
|
457 | " \n", | |
|
458 | " // Tell Backbone to listen to the change event of input controls (which the HTML date picker is)\n", | |
|
459 | " events: {\"change\": \"handle_date_change\"},\n", | |
|
460 | " \n", | |
|
461 | " // Callback for when the date is changed.\n", | |
|
462 | " handle_date_change: function(event) {\n", | |
|
463 | " this.model.set('value', this.$date.val());\n", | |
|
464 | " this.touch();\n", | |
|
465 | " },\n", | |
|
466 | " });\n", | |
|
467 | " \n", | |
|
468 | " // Register the DatePickerView with the widget manager.\n", | |
|
469 | " WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
|
470 | "});" | |
|
471 | ], | |
|
472 | "text/plain": [ | |
|
473 | "<IPython.core.display.Javascript at 0x109491b10>" | |
|
474 | ] | |
|
475 | }, | |
|
476 | "metadata": {}, | |
|
477 | "output_type": "display_data" | |
|
478 | } | |
|
479 | ], | |
|
329 | "outputs": [], | |
|
480 | 330 | "source": [ |
|
481 | 331 | "%%javascript\n", |
|
482 | 332 | "\n", |
|
483 | 333 | "\n", |
|
484 |
"require([\"widgets/js/widget\"], function( |
|
|
334 | "require([\"widgets/js/widget\", \"widgets/js/manager\"], function(widget, manager){\n", | |
|
485 | 335 | " \n", |
|
486 | 336 | " // Define the DatePickerView\n", |
|
487 |
" var DatePickerView = |
|
|
337 | " var DatePickerView = widget.DOMWidgetView.extend({\n", | |
|
488 | 338 | " render: function(){\n", |
|
489 | 339 | " \n", |
|
490 | 340 | " // Create the date picker control.\n", |
|
491 | 341 | " this.$date = $('<input />')\n", |
|
492 | 342 | " .attr('type', 'date')\n", |
|
493 | 343 | " .appendTo(this.$el);\n", |
|
494 | 344 | " },\n", |
|
495 | 345 | " \n", |
|
496 | 346 | " update: function() {\n", |
|
497 | 347 | " \n", |
|
498 | 348 | " // Set the value of the date control and then call base.\n", |
|
499 | 349 | " this.$date.val(this.model.get('value')); // ISO format \"YYYY-MM-DDTHH:mm:ss.sssZ\" is required\n", |
|
500 | 350 | " return DatePickerView.__super__.update.apply(this);\n", |
|
501 | 351 | " },\n", |
|
502 | 352 | " \n", |
|
503 | 353 | " // Tell Backbone to listen to the change event of input controls (which the HTML date picker is)\n", |
|
504 | 354 | " events: {\"change\": \"handle_date_change\"},\n", |
|
505 | 355 | " \n", |
|
506 | 356 | " // Callback for when the date is changed.\n", |
|
507 | 357 | " handle_date_change: function(event) {\n", |
|
508 | 358 | " this.model.set('value', this.$date.val());\n", |
|
509 | 359 | " this.touch();\n", |
|
510 | 360 | " },\n", |
|
511 | 361 | " });\n", |
|
512 | 362 | " \n", |
|
513 | 363 | " // Register the DatePickerView with the widget manager.\n", |
|
514 | " WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
|
364 | " manager.WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
|
515 | 365 | "});" |
|
516 | 366 | ] |
|
517 | 367 | }, |
|
518 | 368 | { |
|
519 | 369 | "cell_type": "markdown", |
|
520 | 370 | "metadata": {}, |
|
521 | 371 | "source": [ |
|
522 | 372 | "## Test" |
|
523 | 373 | ] |
|
524 | 374 | }, |
|
525 | 375 | { |
|
526 | 376 | "cell_type": "markdown", |
|
527 | 377 | "metadata": {}, |
|
528 | 378 | "source": [ |
|
529 | 379 | "To test, create the widget the same way that the other widgets are created." |
|
530 | 380 | ] |
|
531 | 381 | }, |
|
532 | 382 | { |
|
533 | 383 | "cell_type": "code", |
|
534 |
"execution_count": |
|
|
384 | "execution_count": null, | |
|
535 | 385 | "metadata": { |
|
536 | 386 | "collapsed": false |
|
537 | 387 | }, |
|
538 | 388 | "outputs": [], |
|
539 | 389 | "source": [ |
|
540 | 390 | "my_widget = DateWidget()\n", |
|
541 | 391 | "display(my_widget)" |
|
542 | 392 | ] |
|
543 | 393 | }, |
|
544 | 394 | { |
|
545 | 395 | "cell_type": "markdown", |
|
546 | 396 | "metadata": {}, |
|
547 | 397 | "source": [ |
|
548 | 398 | "Display the widget again to make sure that both views remain in sync." |
|
549 | 399 | ] |
|
550 | 400 | }, |
|
551 | 401 | { |
|
552 | 402 | "cell_type": "code", |
|
553 |
"execution_count": |
|
|
403 | "execution_count": null, | |
|
554 | 404 | "metadata": { |
|
555 | 405 | "collapsed": false |
|
556 | 406 | }, |
|
557 | 407 | "outputs": [], |
|
558 | 408 | "source": [ |
|
559 | 409 | "my_widget" |
|
560 | 410 | ] |
|
561 | 411 | }, |
|
562 | 412 | { |
|
563 | 413 | "cell_type": "markdown", |
|
564 | 414 | "metadata": {}, |
|
565 | 415 | "source": [ |
|
566 | 416 | "Read the date from Python" |
|
567 | 417 | ] |
|
568 | 418 | }, |
|
569 | 419 | { |
|
570 | 420 | "cell_type": "code", |
|
571 |
"execution_count": |
|
|
421 | "execution_count": null, | |
|
572 | 422 | "metadata": { |
|
573 | 423 | "collapsed": false |
|
574 | 424 | }, |
|
575 | "outputs": [ | |
|
576 | { | |
|
577 | "data": { | |
|
578 | "text/plain": [ | |
|
579 | "u''" | |
|
580 | ] | |
|
581 | }, | |
|
582 | "execution_count": 12, | |
|
583 | "metadata": {}, | |
|
584 | "output_type": "execute_result" | |
|
585 | } | |
|
586 | ], | |
|
425 | "outputs": [], | |
|
587 | 426 | "source": [ |
|
588 | 427 | "my_widget.value" |
|
589 | 428 | ] |
|
590 | 429 | }, |
|
591 | 430 | { |
|
592 | 431 | "cell_type": "markdown", |
|
593 | 432 | "metadata": {}, |
|
594 | 433 | "source": [ |
|
595 | 434 | "Set the date from Python" |
|
596 | 435 | ] |
|
597 | 436 | }, |
|
598 | 437 | { |
|
599 | 438 | "cell_type": "code", |
|
600 |
"execution_count": |
|
|
439 | "execution_count": null, | |
|
601 | 440 | "metadata": { |
|
602 | 441 | "collapsed": false |
|
603 | 442 | }, |
|
604 | 443 | "outputs": [], |
|
605 | 444 | "source": [ |
|
606 | 445 | "my_widget.value = \"1998-12-01\" # December 1st, 1998" |
|
607 | 446 | ] |
|
608 | 447 | }, |
|
609 | 448 | { |
|
610 | 449 | "cell_type": "markdown", |
|
611 | 450 | "metadata": {}, |
|
612 | 451 | "source": [ |
|
613 | 452 | "# Section 3 - Extra credit" |
|
614 | 453 | ] |
|
615 | 454 | }, |
|
616 | 455 | { |
|
617 | 456 | "cell_type": "markdown", |
|
618 | 457 | "metadata": {}, |
|
619 | 458 | "source": [ |
|
620 | 459 | "The 3rd party `dateutil` library is required to continue. https://pypi.python.org/pypi/python-dateutil" |
|
621 | 460 | ] |
|
622 | 461 | }, |
|
623 | 462 | { |
|
624 | 463 | "cell_type": "code", |
|
625 |
"execution_count": |
|
|
464 | "execution_count": null, | |
|
626 | 465 | "metadata": { |
|
627 | 466 | "collapsed": false |
|
628 | 467 | }, |
|
629 | 468 | "outputs": [], |
|
630 | 469 | "source": [ |
|
631 | 470 | "# Import the dateutil library to parse date strings.\n", |
|
632 | 471 | "from dateutil import parser" |
|
633 | 472 | ] |
|
634 | 473 | }, |
|
635 | 474 | { |
|
636 | 475 | "cell_type": "markdown", |
|
637 | 476 | "metadata": {}, |
|
638 | 477 | "source": [ |
|
639 | 478 | "In the last section we created a fully working date picker widget.\n", |
|
640 | 479 | "Now we will add custom validation and support for labels.\n", |
|
641 | 480 | "So far, only the ISO date format \"YYYY-MM-DD\" is supported.\n", |
|
642 | 481 | "Now, we will add support for all of the date formats recognized by the Python dateutil library." |
|
643 | 482 | ] |
|
644 | 483 | }, |
|
645 | 484 | { |
|
646 | 485 | "cell_type": "markdown", |
|
647 | 486 | "metadata": {}, |
|
648 | 487 | "source": [ |
|
649 | 488 | "## Python" |
|
650 | 489 | ] |
|
651 | 490 | }, |
|
652 | 491 | { |
|
653 | 492 | "cell_type": "markdown", |
|
654 | 493 | "metadata": {}, |
|
655 | 494 | "source": [ |
|
656 | 495 | "The standard property name used for widget labels is `description`.\n", |
|
657 | 496 | "In the code block below, `description` has been added to the Python widget." |
|
658 | 497 | ] |
|
659 | 498 | }, |
|
660 | 499 | { |
|
661 | 500 | "cell_type": "code", |
|
662 |
"execution_count": |
|
|
501 | "execution_count": null, | |
|
663 | 502 | "metadata": { |
|
664 | 503 | "collapsed": false |
|
665 | 504 | }, |
|
666 | 505 | "outputs": [], |
|
667 | 506 | "source": [ |
|
668 | 507 | "class DateWidget(widgets.DOMWidget):\n", |
|
669 | 508 | " _view_name = Unicode('DatePickerView', sync=True)\n", |
|
670 | 509 | " value = Unicode(sync=True)\n", |
|
671 | 510 | " description = Unicode(sync=True)" |
|
672 | 511 | ] |
|
673 | 512 | }, |
|
674 | 513 | { |
|
675 | 514 | "cell_type": "markdown", |
|
676 | 515 | "metadata": {}, |
|
677 | 516 | "source": [ |
|
678 | 517 | "The traitlet machinery searches the class that the trait is defined in for methods with \"`_changed`\" suffixed onto their names. Any method with the format \"`_X_changed`\" will be called when \"`X`\" is modified.\n", |
|
679 | 518 | "We can take advantage of this to perform validation and parsing of different date string formats.\n", |
|
680 | 519 | "Below, a method that listens to value has been added to the DateWidget." |
|
681 | 520 | ] |
|
682 | 521 | }, |
|
683 | 522 | { |
|
684 | 523 | "cell_type": "code", |
|
685 |
"execution_count": |
|
|
524 | "execution_count": null, | |
|
686 | 525 | "metadata": { |
|
687 | 526 | "collapsed": false |
|
688 | 527 | }, |
|
689 | 528 | "outputs": [], |
|
690 | 529 | "source": [ |
|
691 | 530 | "class DateWidget(widgets.DOMWidget):\n", |
|
692 | 531 | " _view_name = Unicode('DatePickerView', sync=True)\n", |
|
693 | 532 | " value = Unicode(sync=True)\n", |
|
694 | 533 | " description = Unicode(sync=True)\n", |
|
695 | 534 | "\n", |
|
696 | 535 | " # This function automatically gets called by the traitlet machinery when\n", |
|
697 | 536 | " # value is modified because of this function's name.\n", |
|
698 | 537 | " def _value_changed(self, name, old_value, new_value):\n", |
|
699 | 538 | " pass" |
|
700 | 539 | ] |
|
701 | 540 | }, |
|
702 | 541 | { |
|
703 | 542 | "cell_type": "markdown", |
|
704 | 543 | "metadata": {}, |
|
705 | 544 | "source": [ |
|
706 | 545 | "Now the function parses the date string,\n", |
|
707 | 546 | "and only sets the value in the correct format." |
|
708 | 547 | ] |
|
709 | 548 | }, |
|
710 | 549 | { |
|
711 | 550 | "cell_type": "code", |
|
712 |
"execution_count": |
|
|
551 | "execution_count": null, | |
|
713 | 552 | "metadata": { |
|
714 | 553 | "collapsed": false |
|
715 | 554 | }, |
|
716 | 555 | "outputs": [], |
|
717 | 556 | "source": [ |
|
718 | 557 | "class DateWidget(widgets.DOMWidget):\n", |
|
719 | 558 | " _view_name = Unicode('DatePickerView', sync=True)\n", |
|
720 | 559 | " value = Unicode(sync=True)\n", |
|
721 | 560 | " description = Unicode(sync=True)\n", |
|
722 | 561 | " \n", |
|
723 | 562 | " # This function automatically gets called by the traitlet machinery when\n", |
|
724 | 563 | " # value is modified because of this function's name.\n", |
|
725 | 564 | " def _value_changed(self, name, old_value, new_value):\n", |
|
726 | 565 | " \n", |
|
727 | 566 | " # Parse the date time value.\n", |
|
728 | 567 | " try:\n", |
|
729 | 568 | " parsed_date = parser.parse(new_value)\n", |
|
730 | 569 | " parsed_date_string = parsed_date.strftime(\"%Y-%m-%d\")\n", |
|
731 | 570 | " except:\n", |
|
732 | 571 | " parsed_date_string = ''\n", |
|
733 | 572 | " \n", |
|
734 | 573 | " # Set the parsed date string if the current date string is different.\n", |
|
735 | 574 | " if self.value != parsed_date_string:\n", |
|
736 | 575 | " self.value = parsed_date_string" |
|
737 | 576 | ] |
|
738 | 577 | }, |
|
739 | 578 | { |
|
740 | 579 | "cell_type": "markdown", |
|
741 | 580 | "metadata": {}, |
|
742 | 581 | "source": [ |
|
743 | 582 | "Finally, a `CallbackDispatcher` is added so the user can perform custom validation.\n", |
|
744 | 583 | "If any one of the callbacks registered with the dispatcher returns False,\n", |
|
745 | 584 | "the new date is not set.\n", |
|
746 | 585 | "\n", |
|
747 | 586 | "**Final Python code below:**" |
|
748 | 587 | ] |
|
749 | 588 | }, |
|
750 | 589 | { |
|
751 | 590 | "cell_type": "code", |
|
752 |
"execution_count": |
|
|
591 | "execution_count": null, | |
|
753 | 592 | "metadata": { |
|
754 | 593 | "collapsed": false |
|
755 | 594 | }, |
|
756 | 595 | "outputs": [], |
|
757 | 596 | "source": [ |
|
758 | 597 | "class DateWidget(widgets.DOMWidget):\n", |
|
759 | 598 | " _view_name = Unicode('DatePickerView', sync=True)\n", |
|
760 | 599 | " value = Unicode(sync=True)\n", |
|
761 | 600 | " description = Unicode(sync=True)\n", |
|
762 | 601 | " \n", |
|
763 | 602 | " def __init__(self, **kwargs):\n", |
|
764 | 603 | " super(DateWidget, self).__init__(**kwargs)\n", |
|
765 | 604 | " \n", |
|
766 | 605 | " self.validate = widgets.CallbackDispatcher()\n", |
|
767 | 606 | " \n", |
|
768 | 607 | " # This function automatically gets called by the traitlet machinery when\n", |
|
769 | 608 | " # value is modified because of this function's name.\n", |
|
770 | 609 | " def _value_changed(self, name, old_value, new_value):\n", |
|
771 | 610 | " \n", |
|
772 | 611 | " # Parse the date time value.\n", |
|
773 | 612 | " try:\n", |
|
774 | 613 | " parsed_date = parser.parse(new_value)\n", |
|
775 | 614 | " parsed_date_string = parsed_date.strftime(\"%Y-%m-%d\")\n", |
|
776 | 615 | " except:\n", |
|
777 | 616 | " parsed_date_string = ''\n", |
|
778 | 617 | " \n", |
|
779 | 618 | " # Set the parsed date string if the current date string is different.\n", |
|
780 | 619 | " if old_value != new_value:\n", |
|
781 | 620 | " valid = self.validate(parsed_date)\n", |
|
782 | 621 | " if valid in (None, True):\n", |
|
783 | 622 | " self.value = parsed_date_string\n", |
|
784 | 623 | " else:\n", |
|
785 | 624 | " self.value = old_value\n", |
|
786 | 625 | " self.send_state() # The traitlet event won't fire since the value isn't changing.\n", |
|
787 | 626 | " # We need to force the back-end to send the front-end the state\n", |
|
788 | 627 | " # to make sure that the date control date doesn't change." |
|
789 | 628 | ] |
|
790 | 629 | }, |
|
791 | 630 | { |
|
792 | 631 | "cell_type": "markdown", |
|
793 | 632 | "metadata": {}, |
|
794 | 633 | "source": [ |
|
795 | 634 | "## JavaScript" |
|
796 | 635 | ] |
|
797 | 636 | }, |
|
798 | 637 | { |
|
799 | 638 | "cell_type": "markdown", |
|
800 | 639 | "metadata": {}, |
|
801 | 640 | "source": [ |
|
802 | 641 | "Using the Javascript code from the last section,\n", |
|
803 | 642 | "we add a label to the date time object.\n", |
|
804 | 643 | "The label is a div with the `widget-hlabel` class applied to it.\n", |
|
805 | 644 | "`widget-hlabel` is a class provided by the widget framework that applies special styling to a div to make it look like the rest of the horizontal labels used with the built-in widgets.\n", |
|
806 | 645 | "Similar to the `widget-hlabel` class is the `widget-hbox-single` class.\n", |
|
807 | 646 | "The `widget-hbox-single` class applies special styling to widget containers that store a single line horizontal widget.\n", |
|
808 | 647 | "\n", |
|
809 | 648 | "We hide the label if the description value is blank." |
|
810 | 649 | ] |
|
811 | 650 | }, |
|
812 | 651 | { |
|
813 | 652 | "cell_type": "code", |
|
814 |
"execution_count": |
|
|
653 | "execution_count": null, | |
|
815 | 654 | "metadata": { |
|
816 | 655 | "collapsed": false |
|
817 | 656 | }, |
|
818 | "outputs": [ | |
|
819 | { | |
|
820 | "data": { | |
|
821 | "application/javascript": [ | |
|
822 | "\n", | |
|
823 | "require([\"widgets/js/widget\"], function(WidgetManager){\n", | |
|
824 | " \n", | |
|
825 | " // Define the DatePickerView\n", | |
|
826 | " var DatePickerView = IPython.DOMWidgetView.extend({\n", | |
|
827 | " render: function(){\n", | |
|
828 | " this.$el.addClass('widget-hbox-single'); /* Apply this class to the widget container to make\n", | |
|
829 | " it fit with the other built in widgets.*/\n", | |
|
830 | " // Create a label.\n", | |
|
831 | " this.$label = $('<div />')\n", | |
|
832 | " .addClass('widget-hlabel')\n", | |
|
833 | " .appendTo(this.$el)\n", | |
|
834 | " .hide(); // Hide the label by default.\n", | |
|
835 | " \n", | |
|
836 | " // Create the date picker control.\n", | |
|
837 | " this.$date = $('<input />')\n", | |
|
838 | " .attr('type', 'date')\n", | |
|
839 | " .appendTo(this.$el);\n", | |
|
840 | " },\n", | |
|
841 | " \n", | |
|
842 | " update: function() {\n", | |
|
843 | " \n", | |
|
844 | " // Set the value of the date control and then call base.\n", | |
|
845 | " this.$date.val(this.model.get('value')); // ISO format \"YYYY-MM-DDTHH:mm:ss.sssZ\" is required\n", | |
|
846 | " \n", | |
|
847 | " // Hide or show the label depending on the existance of a description.\n", | |
|
848 | " var description = this.model.get('description');\n", | |
|
849 | " if (description == undefined || description == '') {\n", | |
|
850 | " this.$label.hide();\n", | |
|
851 | " } else {\n", | |
|
852 | " this.$label.show();\n", | |
|
853 | " this.$label.text(description);\n", | |
|
854 | " }\n", | |
|
855 | " \n", | |
|
856 | " return DatePickerView.__super__.update.apply(this);\n", | |
|
857 | " },\n", | |
|
858 | " \n", | |
|
859 | " // Tell Backbone to listen to the change event of input controls (which the HTML date picker is)\n", | |
|
860 | " events: {\"change\": \"handle_date_change\"},\n", | |
|
861 | " \n", | |
|
862 | " // Callback for when the date is changed.\n", | |
|
863 | " handle_date_change: function(event) {\n", | |
|
864 | " this.model.set('value', this.$date.val());\n", | |
|
865 | " this.touch();\n", | |
|
866 | " },\n", | |
|
867 | " });\n", | |
|
868 | " \n", | |
|
869 | " // Register the DatePickerView with the widget manager.\n", | |
|
870 | " WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
|
871 | "});" | |
|
872 | ], | |
|
873 | "text/plain": [ | |
|
874 | "<IPython.core.display.Javascript at 0x1094eef90>" | |
|
875 | ] | |
|
876 | }, | |
|
877 | "metadata": {}, | |
|
878 | "output_type": "display_data" | |
|
879 | } | |
|
880 | ], | |
|
657 | "outputs": [], | |
|
881 | 658 | "source": [ |
|
882 | 659 | "%%javascript\n", |
|
883 | 660 | "\n", |
|
884 |
"require([\"widgets/js/widget\"], function( |
|
|
661 | "require([\"widgets/js/widget\", \"widgets/js/manager\"], function(widget, manager){\n", | |
|
885 | 662 | " \n", |
|
886 | 663 | " // Define the DatePickerView\n", |
|
887 |
" var DatePickerView = |
|
|
664 | " var DatePickerView = widget.DOMWidgetView.extend({\n", | |
|
888 | 665 | " render: function(){\n", |
|
889 | 666 | " this.$el.addClass('widget-hbox-single'); /* Apply this class to the widget container to make\n", |
|
890 | 667 | " it fit with the other built in widgets.*/\n", |
|
891 | 668 | " // Create a label.\n", |
|
892 | 669 | " this.$label = $('<div />')\n", |
|
893 | 670 | " .addClass('widget-hlabel')\n", |
|
894 | 671 | " .appendTo(this.$el)\n", |
|
895 | 672 | " .hide(); // Hide the label by default.\n", |
|
896 | 673 | " \n", |
|
897 | 674 | " // Create the date picker control.\n", |
|
898 | 675 | " this.$date = $('<input />')\n", |
|
899 | 676 | " .attr('type', 'date')\n", |
|
900 | 677 | " .appendTo(this.$el);\n", |
|
901 | 678 | " },\n", |
|
902 | 679 | " \n", |
|
903 | 680 | " update: function() {\n", |
|
904 | 681 | " \n", |
|
905 | 682 | " // Set the value of the date control and then call base.\n", |
|
906 | 683 | " this.$date.val(this.model.get('value')); // ISO format \"YYYY-MM-DDTHH:mm:ss.sssZ\" is required\n", |
|
907 | 684 | " \n", |
|
908 | 685 | " // Hide or show the label depending on the existance of a description.\n", |
|
909 | 686 | " var description = this.model.get('description');\n", |
|
910 | 687 | " if (description == undefined || description == '') {\n", |
|
911 | 688 | " this.$label.hide();\n", |
|
912 | 689 | " } else {\n", |
|
913 | 690 | " this.$label.show();\n", |
|
914 | 691 | " this.$label.text(description);\n", |
|
915 | 692 | " }\n", |
|
916 | 693 | " \n", |
|
917 | 694 | " return DatePickerView.__super__.update.apply(this);\n", |
|
918 | 695 | " },\n", |
|
919 | 696 | " \n", |
|
920 | 697 | " // Tell Backbone to listen to the change event of input controls (which the HTML date picker is)\n", |
|
921 | 698 | " events: {\"change\": \"handle_date_change\"},\n", |
|
922 | 699 | " \n", |
|
923 | 700 | " // Callback for when the date is changed.\n", |
|
924 | 701 | " handle_date_change: function(event) {\n", |
|
925 | 702 | " this.model.set('value', this.$date.val());\n", |
|
926 | 703 | " this.touch();\n", |
|
927 | 704 | " },\n", |
|
928 | 705 | " });\n", |
|
929 | 706 | " \n", |
|
930 | 707 | " // Register the DatePickerView with the widget manager.\n", |
|
931 | " WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
|
708 | " manager.WidgetManager.register_widget_view('DatePickerView', DatePickerView);\n", | |
|
932 | 709 | "});" |
|
933 | 710 | ] |
|
934 | 711 | }, |
|
935 | 712 | { |
|
936 | 713 | "cell_type": "markdown", |
|
937 | 714 | "metadata": {}, |
|
938 | 715 | "source": [ |
|
939 | 716 | "## Test" |
|
940 | 717 | ] |
|
941 | 718 | }, |
|
942 | 719 | { |
|
943 | 720 | "cell_type": "markdown", |
|
944 | 721 | "metadata": {}, |
|
945 | 722 | "source": [ |
|
946 | 723 | "To test the drawing of the label we create the widget like normal but supply the additional description property a value." |
|
947 | 724 | ] |
|
948 | 725 | }, |
|
949 | 726 | { |
|
950 | 727 | "cell_type": "code", |
|
951 |
"execution_count": |
|
|
728 | "execution_count": null, | |
|
952 | 729 | "metadata": { |
|
953 | 730 | "collapsed": false |
|
954 | 731 | }, |
|
955 | 732 | "outputs": [], |
|
956 | 733 | "source": [ |
|
957 | 734 | "# Add some additional widgets for aesthetic purpose\n", |
|
958 |
"display(widgets.Text |
|
|
959 |
"display(widgets.Text |
|
|
735 | "display(widgets.Text(description=\"First:\"))\n", | |
|
736 | "display(widgets.Text(description=\"Last:\"))\n", | |
|
960 | 737 | "\n", |
|
961 | 738 | "my_widget = DateWidget()\n", |
|
962 | 739 | "display(my_widget)\n", |
|
963 | 740 | "my_widget.description=\"DOB:\"" |
|
964 | 741 | ] |
|
965 | 742 | }, |
|
966 | 743 | { |
|
967 | 744 | "cell_type": "markdown", |
|
968 | 745 | "metadata": {}, |
|
969 | 746 | "source": [ |
|
970 | 747 | "Now we will try to create a widget that only accepts dates in the year 2014. We render the widget without a description to verify that it can still render without a label." |
|
971 | 748 | ] |
|
972 | 749 | }, |
|
973 | 750 | { |
|
974 | 751 | "cell_type": "code", |
|
975 |
"execution_count": |
|
|
752 | "execution_count": null, | |
|
976 | 753 | "metadata": { |
|
977 | 754 | "collapsed": false |
|
978 | 755 | }, |
|
979 | 756 | "outputs": [], |
|
980 | 757 | "source": [ |
|
981 | 758 | "my_widget = DateWidget()\n", |
|
982 | 759 | "display(my_widget)\n", |
|
983 | 760 | "\n", |
|
984 | 761 | "def require_2014(date):\n", |
|
985 | 762 | " return not date is None and date.year == 2014\n", |
|
986 | 763 | "my_widget.validate.register_callback(require_2014)" |
|
987 | 764 | ] |
|
988 | 765 | }, |
|
989 | 766 | { |
|
990 | 767 | "cell_type": "code", |
|
991 |
"execution_count": |
|
|
768 | "execution_count": null, | |
|
992 | 769 | "metadata": { |
|
993 | 770 | "collapsed": false |
|
994 | 771 | }, |
|
995 | 772 | "outputs": [], |
|
996 | 773 | "source": [ |
|
997 | 774 | "# Try setting a valid date\n", |
|
998 | 775 | "my_widget.value = \"December 2, 2014\"" |
|
999 | 776 | ] |
|
1000 | 777 | }, |
|
1001 | 778 | { |
|
1002 | 779 | "cell_type": "code", |
|
1003 |
"execution_count": |
|
|
780 | "execution_count": null, | |
|
1004 | 781 | "metadata": { |
|
1005 | 782 | "collapsed": false |
|
1006 | 783 | }, |
|
1007 | 784 | "outputs": [], |
|
1008 | 785 | "source": [ |
|
1009 | 786 | "# Try setting an invalid date\n", |
|
1010 | 787 | "my_widget.value = \"June 12, 1999\"" |
|
1011 | 788 | ] |
|
1012 | 789 | }, |
|
1013 | 790 | { |
|
1014 | 791 | "cell_type": "code", |
|
1015 |
"execution_count": |
|
|
792 | "execution_count": null, | |
|
1016 | 793 | "metadata": { |
|
1017 | 794 | "collapsed": false |
|
1018 | 795 | }, |
|
1019 | "outputs": [ | |
|
1020 | { | |
|
1021 | "data": { | |
|
1022 | "text/plain": [ | |
|
1023 | "u'2014-12-02'" | |
|
1024 | ] | |
|
1025 | }, | |
|
1026 | "execution_count": 24, | |
|
1027 | "metadata": {}, | |
|
1028 | "output_type": "execute_result" | |
|
1029 | } | |
|
1030 | ], | |
|
796 | "outputs": [], | |
|
1031 | 797 | "source": [ |
|
1032 | 798 | "my_widget.value" |
|
1033 | 799 | ] |
|
800 | }, | |
|
801 | { | |
|
802 | "cell_type": "code", | |
|
803 | "execution_count": null, | |
|
804 | "metadata": { | |
|
805 | "collapsed": true | |
|
806 | }, | |
|
807 | "outputs": [], | |
|
808 | "source": [] | |
|
1034 | 809 | } |
|
1035 | 810 | ], |
|
1036 | 811 | "metadata": { |
|
1037 | 812 | "cell_tags": [ |
|
1038 | 813 | [ |
|
1039 | 814 | "<None>", |
|
1040 | 815 | null |
|
1041 | 816 | ] |
|
1042 | ] | |
|
817 | ], | |
|
818 | "kernelspec": { | |
|
819 | "display_name": "Python 3", | |
|
820 | "name": "python3" | |
|
821 | }, | |
|
822 | "language_info": { | |
|
823 | "codemirror_mode": { | |
|
824 | "name": "ipython", | |
|
825 | "version": 3 | |
|
826 | }, | |
|
827 | "file_extension": ".py", | |
|
828 | "mimetype": "text/x-python", | |
|
829 | "name": "python", | |
|
830 | "nbconvert_exporter": "python", | |
|
831 | "pygments_lexer": "ipython3", | |
|
832 | "version": "3.4.2" | |
|
833 | } | |
|
1043 | 834 | }, |
|
1044 | 835 | "nbformat": 4, |
|
1045 | 836 | "nbformat_minor": 0 |
|
1046 | } No newline at end of file | |
|
837 | } |
@@ -1,580 +1,586 | |||
|
1 | 1 | { |
|
2 | 2 | "cells": [ |
|
3 | 3 | { |
|
4 | 4 | "cell_type": "markdown", |
|
5 | 5 | "metadata": {}, |
|
6 | 6 | "source": [ |
|
7 | 7 | "[Index](Index.ipynb) - [Back](Widget Basics.ipynb) - [Next](Widget Events.ipynb)" |
|
8 | 8 | ] |
|
9 | 9 | }, |
|
10 | 10 | { |
|
11 | 11 | "cell_type": "markdown", |
|
12 | 12 | "metadata": {}, |
|
13 | 13 | "source": [ |
|
14 | 14 | "# Widget List" |
|
15 | 15 | ] |
|
16 | 16 | }, |
|
17 | 17 | { |
|
18 | 18 | "cell_type": "markdown", |
|
19 | 19 | "metadata": {}, |
|
20 | 20 | "source": [ |
|
21 | 21 | "## Complete list" |
|
22 | 22 | ] |
|
23 | 23 | }, |
|
24 | 24 | { |
|
25 | 25 | "cell_type": "markdown", |
|
26 | 26 | "metadata": { |
|
27 | 27 | "slideshow": { |
|
28 | 28 | "slide_type": "slide" |
|
29 | 29 | } |
|
30 | 30 | }, |
|
31 | 31 | "source": [ |
|
32 | 32 | "For a complete list of the widgets available to you, you can list the classes in the widget namespace (as seen below). `Widget` and `DOMWidget`, not listed below, are base classes." |
|
33 | 33 | ] |
|
34 | 34 | }, |
|
35 | 35 | { |
|
36 | 36 | "cell_type": "code", |
|
37 | 37 | "execution_count": null, |
|
38 | 38 | "metadata": { |
|
39 | 39 | "collapsed": false |
|
40 | 40 | }, |
|
41 | 41 | "outputs": [], |
|
42 | 42 | "source": [ |
|
43 | 43 | "from IPython.html import widgets\n", |
|
44 | 44 | "[n for n in dir(widgets) if not n.endswith('Widget') and n[0] == n[0].upper() and not n[0] == '_']" |
|
45 | 45 | ] |
|
46 | 46 | }, |
|
47 | 47 | { |
|
48 | 48 | "cell_type": "markdown", |
|
49 | 49 | "metadata": { |
|
50 | 50 | "slideshow": { |
|
51 | 51 | "slide_type": "slide" |
|
52 | 52 | } |
|
53 | 53 | }, |
|
54 | 54 | "source": [ |
|
55 | 55 | "## Numeric widgets" |
|
56 | 56 | ] |
|
57 | 57 | }, |
|
58 | 58 | { |
|
59 | 59 | "cell_type": "markdown", |
|
60 | 60 | "metadata": {}, |
|
61 | 61 | "source": [ |
|
62 | 62 | "There are 8 widgets distributed with IPython that are designed to display numeric values. Widgets exist for displaying integers and floats, both bounded and unbounded. The integer widgets share a similar naming scheme to their floating point counterparts. By replacing `Float` with `Int` in the widget name, you can find the Integer equivalent." |
|
63 | 63 | ] |
|
64 | 64 | }, |
|
65 | 65 | { |
|
66 | 66 | "cell_type": "markdown", |
|
67 | 67 | "metadata": { |
|
68 | 68 | "slideshow": { |
|
69 | 69 | "slide_type": "slide" |
|
70 | 70 | } |
|
71 | 71 | }, |
|
72 | 72 | "source": [ |
|
73 | 73 | "### FloatSlider" |
|
74 | 74 | ] |
|
75 | 75 | }, |
|
76 | 76 | { |
|
77 | 77 | "cell_type": "code", |
|
78 | 78 | "execution_count": null, |
|
79 | 79 | "metadata": { |
|
80 | 80 | "collapsed": false |
|
81 | 81 | }, |
|
82 | 82 | "outputs": [], |
|
83 | 83 | "source": [ |
|
84 | 84 | "widgets.FloatSlider(\n", |
|
85 | 85 | " value=7.5,\n", |
|
86 | 86 | " min=5.0,\n", |
|
87 | 87 | " max=10.0,\n", |
|
88 | 88 | " step=0.1,\n", |
|
89 | 89 | " description='Test:',\n", |
|
90 | 90 | ")" |
|
91 | 91 | ] |
|
92 | 92 | }, |
|
93 | 93 | { |
|
94 | 94 | "cell_type": "markdown", |
|
95 | 95 | "metadata": {}, |
|
96 | 96 | "source": [ |
|
97 | 97 | "Sliders can also be **displayed vertically**." |
|
98 | 98 | ] |
|
99 | 99 | }, |
|
100 | 100 | { |
|
101 | 101 | "cell_type": "code", |
|
102 | 102 | "execution_count": null, |
|
103 | 103 | "metadata": { |
|
104 | 104 | "collapsed": false |
|
105 | 105 | }, |
|
106 | 106 | "outputs": [], |
|
107 | 107 | "source": [ |
|
108 | 108 | "widgets.FloatSlider(\n", |
|
109 | 109 | " value=7.5,\n", |
|
110 | 110 | " min=5.0,\n", |
|
111 | 111 | " max=10.0,\n", |
|
112 | 112 | " step=0.1,\n", |
|
113 | 113 | " description='Test',\n", |
|
114 | 114 | " orientation='vertical',\n", |
|
115 | 115 | ")" |
|
116 | 116 | ] |
|
117 | 117 | }, |
|
118 | 118 | { |
|
119 | 119 | "cell_type": "markdown", |
|
120 | 120 | "metadata": { |
|
121 | 121 | "slideshow": { |
|
122 | 122 | "slide_type": "slide" |
|
123 | 123 | } |
|
124 | 124 | }, |
|
125 | 125 | "source": [ |
|
126 | 126 | "### FloatProgress" |
|
127 | 127 | ] |
|
128 | 128 | }, |
|
129 | 129 | { |
|
130 | 130 | "cell_type": "code", |
|
131 | 131 | "execution_count": null, |
|
132 | 132 | "metadata": { |
|
133 | 133 | "collapsed": false |
|
134 | 134 | }, |
|
135 | 135 | "outputs": [], |
|
136 | 136 | "source": [ |
|
137 | 137 | "widgets.FloatProgress(\n", |
|
138 | 138 | " value=7.5,\n", |
|
139 | 139 | " min=5.0,\n", |
|
140 | 140 | " max=10.0,\n", |
|
141 | 141 | " step=0.1,\n", |
|
142 | 142 | " description='Loading:',\n", |
|
143 | 143 | ")" |
|
144 | 144 | ] |
|
145 | 145 | }, |
|
146 | 146 | { |
|
147 | 147 | "cell_type": "markdown", |
|
148 | 148 | "metadata": { |
|
149 | 149 | "slideshow": { |
|
150 | 150 | "slide_type": "slide" |
|
151 | 151 | } |
|
152 | 152 | }, |
|
153 | 153 | "source": [ |
|
154 | 154 | "### BoundedFloatText" |
|
155 | 155 | ] |
|
156 | 156 | }, |
|
157 | 157 | { |
|
158 | 158 | "cell_type": "code", |
|
159 | 159 | "execution_count": null, |
|
160 | 160 | "metadata": { |
|
161 | 161 | "collapsed": false |
|
162 | 162 | }, |
|
163 | 163 | "outputs": [], |
|
164 | 164 | "source": [ |
|
165 | 165 | "widgets.BoundedFloatText(\n", |
|
166 | 166 | " value=7.5,\n", |
|
167 | 167 | " min=5.0,\n", |
|
168 | 168 | " max=10.0,\n", |
|
169 | 169 | " description='Text:',\n", |
|
170 | 170 | ")" |
|
171 | 171 | ] |
|
172 | 172 | }, |
|
173 | 173 | { |
|
174 | 174 | "cell_type": "markdown", |
|
175 | 175 | "metadata": { |
|
176 | 176 | "slideshow": { |
|
177 | 177 | "slide_type": "slide" |
|
178 | 178 | } |
|
179 | 179 | }, |
|
180 | 180 | "source": [ |
|
181 | 181 | "### FloatText" |
|
182 | 182 | ] |
|
183 | 183 | }, |
|
184 | 184 | { |
|
185 | 185 | "cell_type": "code", |
|
186 | 186 | "execution_count": null, |
|
187 | 187 | "metadata": { |
|
188 | 188 | "collapsed": false |
|
189 | 189 | }, |
|
190 | 190 | "outputs": [], |
|
191 | 191 | "source": [ |
|
192 | 192 | "widgets.FloatText(\n", |
|
193 | 193 | " value=7.5,\n", |
|
194 | 194 | " description='Any:',\n", |
|
195 | 195 | ")" |
|
196 | 196 | ] |
|
197 | 197 | }, |
|
198 | 198 | { |
|
199 | 199 | "cell_type": "markdown", |
|
200 | 200 | "metadata": { |
|
201 | 201 | "slideshow": { |
|
202 | 202 | "slide_type": "slide" |
|
203 | 203 | } |
|
204 | 204 | }, |
|
205 | 205 | "source": [ |
|
206 | 206 | "## Boolean widgets" |
|
207 | 207 | ] |
|
208 | 208 | }, |
|
209 | 209 | { |
|
210 | 210 | "cell_type": "markdown", |
|
211 | 211 | "metadata": {}, |
|
212 | 212 | "source": [ |
|
213 | 213 | "There are two widgets that are designed to display a boolean value." |
|
214 | 214 | ] |
|
215 | 215 | }, |
|
216 | 216 | { |
|
217 | 217 | "cell_type": "markdown", |
|
218 | 218 | "metadata": {}, |
|
219 | 219 | "source": [ |
|
220 | 220 | "### ToggleButton" |
|
221 | 221 | ] |
|
222 | 222 | }, |
|
223 | 223 | { |
|
224 | 224 | "cell_type": "code", |
|
225 | 225 | "execution_count": null, |
|
226 | 226 | "metadata": { |
|
227 | 227 | "collapsed": false |
|
228 | 228 | }, |
|
229 | 229 | "outputs": [], |
|
230 | 230 | "source": [ |
|
231 | 231 | "widgets.ToggleButton(\n", |
|
232 | 232 | " description='Click me',\n", |
|
233 | 233 | " value=False,\n", |
|
234 | 234 | ")" |
|
235 | 235 | ] |
|
236 | 236 | }, |
|
237 | 237 | { |
|
238 | 238 | "cell_type": "markdown", |
|
239 | 239 | "metadata": { |
|
240 | 240 | "slideshow": { |
|
241 | 241 | "slide_type": "slide" |
|
242 | 242 | } |
|
243 | 243 | }, |
|
244 | 244 | "source": [ |
|
245 | 245 | "### Checkbox" |
|
246 | 246 | ] |
|
247 | 247 | }, |
|
248 | 248 | { |
|
249 | 249 | "cell_type": "code", |
|
250 | 250 | "execution_count": null, |
|
251 | 251 | "metadata": { |
|
252 | 252 | "collapsed": false |
|
253 | 253 | }, |
|
254 | 254 | "outputs": [], |
|
255 | 255 | "source": [ |
|
256 | 256 | "widgets.Checkbox(\n", |
|
257 | 257 | " description='Check me',\n", |
|
258 | 258 | " value=True,\n", |
|
259 | 259 | ")" |
|
260 | 260 | ] |
|
261 | 261 | }, |
|
262 | 262 | { |
|
263 | 263 | "cell_type": "markdown", |
|
264 | 264 | "metadata": { |
|
265 | 265 | "slideshow": { |
|
266 | 266 | "slide_type": "slide" |
|
267 | 267 | } |
|
268 | 268 | }, |
|
269 | 269 | "source": [ |
|
270 | 270 | "## Selection widgets" |
|
271 | 271 | ] |
|
272 | 272 | }, |
|
273 | 273 | { |
|
274 | 274 | "cell_type": "markdown", |
|
275 | 275 | "metadata": {}, |
|
276 | 276 | "source": [ |
|
277 | 277 | "There are four widgets that can be used to display single selection lists. All four inherit from the same base class. You can specify the **enumeration of selectables by passing a list**. You can **also specify the enumeration as a dictionary**, in which case the **keys will be used as the item displayed** in the list and the corresponding **value will be returned** when an item is selected." |
|
278 | 278 | ] |
|
279 | 279 | }, |
|
280 | 280 | { |
|
281 | 281 | "cell_type": "markdown", |
|
282 | 282 | "metadata": { |
|
283 | 283 | "slideshow": { |
|
284 | 284 | "slide_type": "slide" |
|
285 | 285 | } |
|
286 | 286 | }, |
|
287 | 287 | "source": [ |
|
288 | 288 | "### Dropdown" |
|
289 | 289 | ] |
|
290 | 290 | }, |
|
291 | 291 | { |
|
292 | 292 | "cell_type": "code", |
|
293 | 293 | "execution_count": null, |
|
294 | 294 | "metadata": { |
|
295 | 295 | "collapsed": false |
|
296 | 296 | }, |
|
297 | 297 | "outputs": [], |
|
298 | 298 | "source": [ |
|
299 | 299 | "from IPython.display import display\n", |
|
300 | 300 | "w = widgets.Dropdown(\n", |
|
301 | " values=[1, 2, 3],\n", | |
|
302 | " value=2,\n", | |
|
301 | " values=['1', '2', '3'],\n", | |
|
302 | " value='2',\n", | |
|
303 | 303 | " description='Number:',\n", |
|
304 | 304 | ")\n", |
|
305 | 305 | "display(w)" |
|
306 | 306 | ] |
|
307 | 307 | }, |
|
308 | 308 | { |
|
309 | 309 | "cell_type": "code", |
|
310 | 310 | "execution_count": null, |
|
311 | 311 | "metadata": { |
|
312 | 312 | "collapsed": false |
|
313 | 313 | }, |
|
314 | 314 | "outputs": [], |
|
315 | 315 | "source": [ |
|
316 | 316 | "w.value" |
|
317 | 317 | ] |
|
318 | 318 | }, |
|
319 | 319 | { |
|
320 | 320 | "cell_type": "markdown", |
|
321 | 321 | "metadata": {}, |
|
322 | 322 | "source": [ |
|
323 | 323 | "The following is also valid:" |
|
324 | 324 | ] |
|
325 | 325 | }, |
|
326 | 326 | { |
|
327 | 327 | "cell_type": "code", |
|
328 | 328 | "execution_count": null, |
|
329 | 329 | "metadata": { |
|
330 | 330 | "collapsed": false |
|
331 | 331 | }, |
|
332 | 332 | "outputs": [], |
|
333 | 333 | "source": [ |
|
334 | 334 | "w = widgets.Dropdown(\n", |
|
335 | 335 | " values={'One': 1, 'Two': 2, 'Three': 3},\n", |
|
336 | 336 | " value=2,\n", |
|
337 | 337 | " description='Number:',\n", |
|
338 | 338 | ")\n", |
|
339 | 339 | "display(w)" |
|
340 | 340 | ] |
|
341 | 341 | }, |
|
342 | 342 | { |
|
343 | 343 | "cell_type": "code", |
|
344 | 344 | "execution_count": null, |
|
345 | 345 | "metadata": { |
|
346 | 346 | "collapsed": false |
|
347 | 347 | }, |
|
348 | 348 | "outputs": [], |
|
349 | 349 | "source": [ |
|
350 | 350 | "w.value" |
|
351 | 351 | ] |
|
352 | 352 | }, |
|
353 | 353 | { |
|
354 | 354 | "cell_type": "markdown", |
|
355 | 355 | "metadata": { |
|
356 | 356 | "slideshow": { |
|
357 | 357 | "slide_type": "slide" |
|
358 | 358 | } |
|
359 | 359 | }, |
|
360 | 360 | "source": [ |
|
361 | 361 | "### RadioButtons" |
|
362 | 362 | ] |
|
363 | 363 | }, |
|
364 | 364 | { |
|
365 | 365 | "cell_type": "code", |
|
366 | 366 | "execution_count": null, |
|
367 | 367 | "metadata": { |
|
368 | 368 | "collapsed": false |
|
369 | 369 | }, |
|
370 | 370 | "outputs": [], |
|
371 | 371 | "source": [ |
|
372 | 372 | "widgets.RadioButtons(\n", |
|
373 | 373 | " description='Pizza topping:',\n", |
|
374 | 374 | " values=['pepperoni', 'pineapple', 'anchovies'],\n", |
|
375 | 375 | ")" |
|
376 | 376 | ] |
|
377 | 377 | }, |
|
378 | 378 | { |
|
379 | 379 | "cell_type": "markdown", |
|
380 | 380 | "metadata": { |
|
381 | 381 | "slideshow": { |
|
382 | 382 | "slide_type": "slide" |
|
383 | 383 | } |
|
384 | 384 | }, |
|
385 | 385 | "source": [ |
|
386 | 386 | "### Select" |
|
387 | 387 | ] |
|
388 | 388 | }, |
|
389 | 389 | { |
|
390 | 390 | "cell_type": "code", |
|
391 | 391 | "execution_count": null, |
|
392 | 392 | "metadata": { |
|
393 | 393 | "collapsed": false |
|
394 | 394 | }, |
|
395 | 395 | "outputs": [], |
|
396 | 396 | "source": [ |
|
397 | 397 | "widgets.Select(\n", |
|
398 | 398 | " description='OS:',\n", |
|
399 | 399 | " values=['Linux', 'Windows', 'OSX'],\n", |
|
400 | 400 | ")" |
|
401 | 401 | ] |
|
402 | 402 | }, |
|
403 | 403 | { |
|
404 | 404 | "cell_type": "markdown", |
|
405 | 405 | "metadata": { |
|
406 | 406 | "slideshow": { |
|
407 | 407 | "slide_type": "slide" |
|
408 | 408 | } |
|
409 | 409 | }, |
|
410 | 410 | "source": [ |
|
411 | 411 | "### ToggleButtons" |
|
412 | 412 | ] |
|
413 | 413 | }, |
|
414 | 414 | { |
|
415 | 415 | "cell_type": "code", |
|
416 | 416 | "execution_count": null, |
|
417 | 417 | "metadata": { |
|
418 | 418 | "collapsed": false |
|
419 | 419 | }, |
|
420 | 420 | "outputs": [], |
|
421 | 421 | "source": [ |
|
422 | 422 | "widgets.ToggleButtons(\n", |
|
423 | 423 | " description='Speed:',\n", |
|
424 | 424 | " values=['Slow', 'Regular', 'Fast'],\n", |
|
425 | 425 | ")" |
|
426 | 426 | ] |
|
427 | 427 | }, |
|
428 | 428 | { |
|
429 | 429 | "cell_type": "markdown", |
|
430 | 430 | "metadata": { |
|
431 | 431 | "slideshow": { |
|
432 | 432 | "slide_type": "slide" |
|
433 | 433 | } |
|
434 | 434 | }, |
|
435 | 435 | "source": [ |
|
436 | 436 | "## String widgets" |
|
437 | 437 | ] |
|
438 | 438 | }, |
|
439 | 439 | { |
|
440 | 440 | "cell_type": "markdown", |
|
441 | 441 | "metadata": {}, |
|
442 | 442 | "source": [ |
|
443 | 443 | "There are 4 widgets that can be used to display a string value. Of those, the **`Text` and `Textarea` widgets accept input**. The **`Latex` and `HTML` widgets display the string** as either Latex or HTML respectively, but **do not accept input**." |
|
444 | 444 | ] |
|
445 | 445 | }, |
|
446 | 446 | { |
|
447 | 447 | "cell_type": "markdown", |
|
448 | 448 | "metadata": { |
|
449 | 449 | "slideshow": { |
|
450 | 450 | "slide_type": "slide" |
|
451 | 451 | } |
|
452 | 452 | }, |
|
453 | 453 | "source": [ |
|
454 | 454 | "### Text" |
|
455 | 455 | ] |
|
456 | 456 | }, |
|
457 | 457 | { |
|
458 | 458 | "cell_type": "code", |
|
459 | 459 | "execution_count": null, |
|
460 | 460 | "metadata": { |
|
461 | 461 | "collapsed": false |
|
462 | 462 | }, |
|
463 | 463 | "outputs": [], |
|
464 | 464 | "source": [ |
|
465 | 465 | "widgets.Text(\n", |
|
466 | 466 | " description='String:',\n", |
|
467 | 467 | " value='Hello World',\n", |
|
468 | 468 | ")" |
|
469 | 469 | ] |
|
470 | 470 | }, |
|
471 | 471 | { |
|
472 | 472 | "cell_type": "markdown", |
|
473 | 473 | "metadata": {}, |
|
474 | 474 | "source": [ |
|
475 | 475 | "### Textarea" |
|
476 | 476 | ] |
|
477 | 477 | }, |
|
478 | 478 | { |
|
479 | 479 | "cell_type": "code", |
|
480 | 480 | "execution_count": null, |
|
481 | 481 | "metadata": { |
|
482 | 482 | "collapsed": false |
|
483 | 483 | }, |
|
484 | 484 | "outputs": [], |
|
485 | 485 | "source": [ |
|
486 | 486 | "widgets.Textarea(\n", |
|
487 | 487 | " description='String:',\n", |
|
488 | 488 | " value='Hello World',\n", |
|
489 | 489 | ")" |
|
490 | 490 | ] |
|
491 | 491 | }, |
|
492 | 492 | { |
|
493 | 493 | "cell_type": "markdown", |
|
494 | 494 | "metadata": { |
|
495 | 495 | "slideshow": { |
|
496 | 496 | "slide_type": "slide" |
|
497 | 497 | } |
|
498 | 498 | }, |
|
499 | 499 | "source": [ |
|
500 | 500 | "### Latex" |
|
501 | 501 | ] |
|
502 | 502 | }, |
|
503 | 503 | { |
|
504 | 504 | "cell_type": "code", |
|
505 | 505 | "execution_count": null, |
|
506 | 506 | "metadata": { |
|
507 | 507 | "collapsed": false |
|
508 | 508 | }, |
|
509 | 509 | "outputs": [], |
|
510 | 510 | "source": [ |
|
511 | 511 | "widgets.Latex(\n", |
|
512 | 512 | " value=\"$$\\\\frac{n!}{k!(n-k)!} = \\\\binom{n}{k}$$\",\n", |
|
513 | 513 | ")" |
|
514 | 514 | ] |
|
515 | 515 | }, |
|
516 | 516 | { |
|
517 | 517 | "cell_type": "markdown", |
|
518 | 518 | "metadata": {}, |
|
519 | 519 | "source": [ |
|
520 | 520 | "### HTML" |
|
521 | 521 | ] |
|
522 | 522 | }, |
|
523 | 523 | { |
|
524 | 524 | "cell_type": "code", |
|
525 | 525 | "execution_count": null, |
|
526 | 526 | "metadata": { |
|
527 | 527 | "collapsed": false |
|
528 | 528 | }, |
|
529 | 529 | "outputs": [], |
|
530 | 530 | "source": [ |
|
531 | 531 | "widgets.HTML(\n", |
|
532 | 532 | " value=\"Hello <b>World</b>\"\n", |
|
533 | 533 | ")" |
|
534 | 534 | ] |
|
535 | 535 | }, |
|
536 | 536 | { |
|
537 | 537 | "cell_type": "markdown", |
|
538 | 538 | "metadata": { |
|
539 | 539 | "slideshow": { |
|
540 | 540 | "slide_type": "slide" |
|
541 | 541 | } |
|
542 | 542 | }, |
|
543 | 543 | "source": [ |
|
544 | 544 | "## Button" |
|
545 | 545 | ] |
|
546 | 546 | }, |
|
547 | 547 | { |
|
548 | 548 | "cell_type": "code", |
|
549 | 549 | "execution_count": null, |
|
550 | 550 | "metadata": { |
|
551 | 551 | "collapsed": false |
|
552 | 552 | }, |
|
553 | 553 | "outputs": [], |
|
554 | 554 | "source": [ |
|
555 | 555 | "widgets.Button(description='Click me')" |
|
556 | 556 | ] |
|
557 | 557 | }, |
|
558 | 558 | { |
|
559 | 559 | "cell_type": "markdown", |
|
560 | 560 | "metadata": {}, |
|
561 | 561 | "source": [ |
|
562 | 562 | "[Index](Index.ipynb) - [Back](Widget Basics.ipynb) - [Next](Widget Events.ipynb)" |
|
563 | 563 | ] |
|
564 | 564 | } |
|
565 | 565 | ], |
|
566 | 566 | "metadata": { |
|
567 | 567 | "kernelspec": { |
|
568 | "codemirror_mode": { | |
|
569 | "name": "python", | |
|
570 | "version": 2 | |
|
571 | }, | |
|
572 | 568 | "display_name": "Python 2", |
|
573 | "language": "python", | |
|
574 | 569 | "name": "python2" |
|
575 | 570 | }, |
|
576 | "signature": "sha256:83b39d018a7a6ae0a324b9f3d38debafbfb2ed0a114e4bbd357fb318f8f23438" | |
|
571 | "language_info": { | |
|
572 | "codemirror_mode": { | |
|
573 | "name": "ipython", | |
|
574 | "version": 2 | |
|
575 | }, | |
|
576 | "file_extension": ".py", | |
|
577 | "mimetype": "text/x-python", | |
|
578 | "name": "python", | |
|
579 | "nbconvert_exporter": "python", | |
|
580 | "pygments_lexer": "ipython2", | |
|
581 | "version": "2.7.8" | |
|
582 | } | |
|
577 | 583 | }, |
|
578 | 584 | "nbformat": 4, |
|
579 | 585 | "nbformat_minor": 0 |
|
580 | } No newline at end of file | |
|
586 | } |
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