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/dist/bower_components/backbone-amd/docs/todos.html

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  1. <!DOCTYPE html>
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  2. 

  3. <html>
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  4. <head>
    5. 

  5.   <title>todos.js</title>
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  6.   <meta http-equiv="content-type" content="text/html; charset=UTF-8">
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  7.   <meta name="viewport" content="width=device-width, target-densitydpi=160dpi, initial-scale=1.0; maximum-scale=1.0; user-scalable=0;">
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  8.   <link rel="stylesheet" media="all" href="docco.css" />
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  9. </head>
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  10. <body>
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  11.   <div id="container">
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  12.     <div id="background"></div>
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  13.     
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  14.       <ul id="jump_to">
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  15.         <li>
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  16.           <a class="large" href="javascript:void(0);">Jump To &hellip;</a>
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  17.           <a class="small" href="javascript:void(0);">+</a>
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  18.           <div id="jump_wrapper">
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  19.           <div id="jump_page">
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  20.             
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  21.               
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  22.               <a class="source" href="backbone.localstorage.html">
    23. 

  23.                 backbone.localstorage.js
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  24.               </a>
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  25.             
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  26.               
    27. 

  27.               <a class="source" href="todos.html">
    28. 

  28.                 todos.js
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  29.               </a>
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  30.             
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  31.           </div>
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  32.         </li>
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  33.       </ul>
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  34.     
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  35.     <ul class="sections">
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  36.         
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  37.           <li id="title">
    38. 

  38.               <div class="annotation">
    39. 

  39.                   <h1>todos.js</h1>
    40. 

  40.               </div>
    41. 

  41.           </li>
    42. 

  42.         
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  43.         
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  44.         
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  45.         <li id="section-1">
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  46.             <div class="annotation">
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  47.               
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  48.               <div class="pilwrap ">
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  49.                 <a class="pilcrow" href="#section-1">&#182;</a>
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  50.               </div>
    51. 

  51.               <p>An example Backbone application contributed by
    52. 

  52. <a href="http://jgn.me/">Jérôme Gravel-Niquet</a>. This demo uses a simple
    53. 

  53. <a href="backbone-localstorage.html">LocalStorage adapter</a>
    54. 

  54. to persist Backbone models within your browser.</p>
    55. 

  55. <p>Load the application once the DOM is ready, using <code>jQuery.ready</code>:</p>
    56. 

  56. 

  57.             </div>
    58. 

  58.             
    59. 

  59.             <div class="content"><div class='highlight'><pre>$(<span class="keyword">function</span>(){</pre></div></div>
    60. 

  60.             
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  61.         </li>
    62. 

  62.         
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  63.         
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  64.         <li id="section-2">
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  65.             <div class="annotation">
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  66.               
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  67.               <div class="pilwrap for-h2">
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  68.                 <a class="pilcrow" href="#section-2">&#182;</a>
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  69.               </div>
    70. 

  70.               <h2>Todo Model</h2>
    71. 

  71. 

  72.             </div>
    73. 

  73.             
    74. 

  74.         </li>
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  75.         
    76. 

  76.         
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  77.         <li id="section-3">
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  78.             <div class="annotation">
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  79.               
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  80.               <div class="pilwrap ">
    81. 

  81.                 <a class="pilcrow" href="#section-3">&#182;</a>
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  82.               </div>
    83. 

  83.               <p>Our basic <strong>Todo</strong> model has <code>title</code>, <code>order</code>, and <code>done</code> attributes.</p>
    84. 

  84. 

  85.             </div>
    86. 

  86.             
    87. 

  87.             <div class="content"><div class='highlight'><pre>  <span class="keyword">var</span> Todo = Backbone.Model.extend({</pre></div></div>
    88. 

  88.             
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  89.         </li>
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  90.         
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  91.         
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  92.         <li id="section-4">
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  93.             <div class="annotation">
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  94.               
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  95.               <div class="pilwrap ">
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  96.                 <a class="pilcrow" href="#section-4">&#182;</a>
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  97.               </div>
    98. 

  98.               <p>Default attributes for the todo item.</p>
    99. 

  99. 

  100.             </div>
    101. 

  101.             
    102. 

  102.             <div class="content"><div class='highlight'><pre>    defaults: <span class="keyword">function</span>() {
    103. 

  103.       <span class="keyword">return</span> {
    104. 

  104.         title: <span class="string">"empty todo..."</span>,
    105. 

  105.         order: Todos.nextOrder(),
    106. 

  106.         done: <span class="literal">false</span>
    107. 

  107.       };
    108. 

  108.     },</pre></div></div>
    109. 

  109.             
    110. 

  110.         </li>
    111. 

  111.         
    112. 

  112.         
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  113.         <li id="section-5">
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  114.             <div class="annotation">
    115. 

  115.               
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  116.               <div class="pilwrap ">
    117. 

  117.                 <a class="pilcrow" href="#section-5">&#182;</a>
    118. 

  118.               </div>
    119. 

  119.               <p>Toggle the <code>done</code> state of this todo item.</p>
    120. 

  120. 

  121.             </div>
    122. 

  122.             
    123. 

  123.             <div class="content"><div class='highlight'><pre>    toggle: <span class="keyword">function</span>() {
    124. 

  124.       <span class="keyword">this</span>.save({done: !<span class="keyword">this</span>.get(<span class="string">"done"</span>)});
    125. 

  125.     }
    126. 

  126. 

  127.   });</pre></div></div>
    128. 

  128.             
    129. 

  129.         </li>
    130. 

  130.         
    131. 

  131.         
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  132.         <li id="section-6">
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  133.             <div class="annotation">
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  134.               
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  135.               <div class="pilwrap for-h2">
    136. 

  136.                 <a class="pilcrow" href="#section-6">&#182;</a>
    137. 

  137.               </div>
    138. 

  138.               <h2>Todo Collection</h2>
    139. 

  139. 

  140.             </div>
    141. 

  141.             
    142. 

  142.         </li>
    143. 

  143.         
    144. 

  144.         
    145. 

  145.         <li id="section-7">
    146. 

  146.             <div class="annotation">
    147. 

  147.               
    148. 

  148.               <div class="pilwrap ">
    149. 

  149.                 <a class="pilcrow" href="#section-7">&#182;</a>
    150. 

  150.               </div>
    151. 

  151.               <p>The collection of todos is backed by <em>localStorage</em> instead of a remote
    152. 

  152. server.</p>
    153. 

  153. 

  154.             </div>
    155. 

  155.             
    156. 

  156.             <div class="content"><div class='highlight'><pre>  <span class="keyword">var</span> TodoList = Backbone.Collection.extend({</pre></div></div>
    157. 

  157.             
    158. 

  158.         </li>
    159. 

  159.         
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  160.         
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  161.         <li id="section-8">
    162. 

  162.             <div class="annotation">
    163. 

  163.               
    164. 

  164.               <div class="pilwrap ">
    165. 

  165.                 <a class="pilcrow" href="#section-8">&#182;</a>
    166. 

  166.               </div>
    167. 

  167.               <p>Reference to this collection&#39;s model.</p>
    168. 

  168. 

  169.             </div>
    170. 

  170.             
    171. 

  171.             <div class="content"><div class='highlight'><pre>    model: Todo,</pre></div></div>
    172. 

  172.             
    173. 

  173.         </li>
    174. 

  174.         
    175. 

  175.         
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  176.         <li id="section-9">
    177. 

  177.             <div class="annotation">
    178. 

  178.               
    179. 

  179.               <div class="pilwrap ">
    180. 

  180.                 <a class="pilcrow" href="#section-9">&#182;</a>
    181. 

  181.               </div>
    182. 

  182.               <p>Save all of the todo items under the <code>&quot;todos-backbone&quot;</code> namespace.</p>
    183. 

  183. 

  184.             </div>
    185. 

  185.             
    186. 

  186.             <div class="content"><div class='highlight'><pre>    localStorage: <span class="keyword">new</span> Backbone.LocalStorage(<span class="string">"todos-backbone"</span>),</pre></div></div>
    187. 

  187.             
    188. 

  188.         </li>
    189. 

  189.         
    190. 

  190.         
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  191.         <li id="section-10">
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  192.             <div class="annotation">
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  193.               
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  194.               <div class="pilwrap ">
    195. 

  195.                 <a class="pilcrow" href="#section-10">&#182;</a>
    196. 

  196.               </div>
    197. 

  197.               <p>Filter down the list of all todo items that are finished.</p>
    198. 

  198. 

  199.             </div>
    200. 

  200.             
    201. 

  201.             <div class="content"><div class='highlight'><pre>    done: <span class="keyword">function</span>() {
    202. 

  202.       <span class="keyword">return</span> <span class="keyword">this</span>.where({done: <span class="literal">true</span>});
    203. 

  203.     },</pre></div></div>
    204. 

  204.             
    205. 

  205.         </li>
    206. 

  206.         
    207. 

  207.         
    208. 

  208.         <li id="section-11">
    209. 

  209.             <div class="annotation">
    210. 

  210.               
    211. 

  211.               <div class="pilwrap ">
    212. 

  212.                 <a class="pilcrow" href="#section-11">&#182;</a>
    213. 

  213.               </div>
    214. 

  214.               <p>Filter down the list to only todo items that are still not finished.</p>
    215. 

  215. 

  216.             </div>
    217. 

  217.             
    218. 

  218.             <div class="content"><div class='highlight'><pre>    remaining: <span class="keyword">function</span>() {
    219. 

  219.       <span class="keyword">return</span> <span class="keyword">this</span>.where({done: <span class="literal">false</span>});
    220. 

  220.     },</pre></div></div>
    221. 

  221.             
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  222.         </li>
    223. 

  223.         
    224. 

  224.         
    225. 

  225.         <li id="section-12">
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  226.             <div class="annotation">
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  227.               
    228. 

  228.               <div class="pilwrap ">
    229. 

  229.                 <a class="pilcrow" href="#section-12">&#182;</a>
    230. 

  230.               </div>
    231. 

  231.               <p>We keep the Todos in sequential order, despite being saved by unordered
    232. 

  232. GUID in the database. This generates the next order number for new items.</p>
    233. 

  233. 

  234.             </div>
    235. 

  235.             
    236. 

  236.             <div class="content"><div class='highlight'><pre>    nextOrder: <span class="keyword">function</span>() {
    237. 

  237.       <span class="keyword">if</span> (!<span class="keyword">this</span>.length) <span class="keyword">return</span> <span class="number">1</span>;
    238. 

  238.       <span class="keyword">return</span> <span class="keyword">this</span>.last().get(<span class="string">'order'</span>) + <span class="number">1</span>;
    239. 

  239.     },</pre></div></div>
    240. 

  240.             
    241. 

  241.         </li>
    242. 

  242.         
    243. 

  243.         
    244. 

  244.         <li id="section-13">
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  245.             <div class="annotation">
    246. 

  246.               
    247. 

  247.               <div class="pilwrap ">
    248. 

  248.                 <a class="pilcrow" href="#section-13">&#182;</a>
    249. 

  249.               </div>
    250. 

  250.               <p>Todos are sorted by their original insertion order.</p>
    251. 

  251. 

  252.             </div>
    253. 

  253.             
    254. 

  254.             <div class="content"><div class='highlight'><pre>    comparator: <span class="string">'order'</span>
    255. 

  255. 

  256.   });</pre></div></div>
    257. 

  257.             
    258. 

  258.         </li>
    259. 

  259.         
    260. 

  260.         
    261. 

  261.         <li id="section-14">
    262. 

  262.             <div class="annotation">
    263. 

  263.               
    264. 

  264.               <div class="pilwrap ">
    265. 

  265.                 <a class="pilcrow" href="#section-14">&#182;</a>
    266. 

  266.               </div>
    267. 

  267.               <p>Create our global collection of <strong>Todos</strong>.</p>
    268. 

  268. 

  269.             </div>
    270. 

  270.             
    271. 

  271.             <div class="content"><div class='highlight'><pre>  <span class="keyword">var</span> Todos = <span class="keyword">new</span> TodoList;</pre></div></div>
    272. 

  272.             
    273. 

  273.         </li>
    274. 

  274.         
    275. 

  275.         
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  276.         <li id="section-15">
    277. 

  277.             <div class="annotation">
    278. 

  278.               
    279. 

  279.               <div class="pilwrap for-h2">
    280. 

  280.                 <a class="pilcrow" href="#section-15">&#182;</a>
    281. 

  281.               </div>
    282. 

  282.               <h2>Todo Item View</h2>
    283. 

  283. 

  284.             </div>
    285. 

  285.             
    286. 

  286.         </li>
    287. 

  287.         
    288. 

  288.         
    289. 

  289.         <li id="section-16">
    290. 

  290.             <div class="annotation">
    291. 

  291.               
    292. 

  292.               <div class="pilwrap ">
    293. 

  293.                 <a class="pilcrow" href="#section-16">&#182;</a>
    294. 

  294.               </div>
    295. 

  295.               <p>The DOM element for a todo item...</p>
    296. 

  296. 

  297.             </div>
    298. 

  298.             
    299. 

  299.             <div class="content"><div class='highlight'><pre>  <span class="keyword">var</span> TodoView = Backbone.View.extend({</pre></div></div>
    300. 

  300.             
    301. 

  301.         </li>
    302. 

  302.         
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  303.         
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  304.         <li id="section-17">
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  305.             <div class="annotation">
    306. 

  306.               
    307. 

  307.               <div class="pilwrap ">
    308. 

  308.                 <a class="pilcrow" href="#section-17">&#182;</a>
    309. 

  309.               </div>
    310. 

  310.               <p>... is a list tag.</p>
    311. 

  311. 

  312.             </div>
    313. 

  313.             
    314. 

  314.             <div class="content"><div class='highlight'><pre>    tagName:  <span class="string">"li"</span>,</pre></div></div>
    315. 

  315.             
    316. 

  316.         </li>
    317. 

  317.         
    318. 

  318.         
    319. 

  319.         <li id="section-18">
    320. 

  320.             <div class="annotation">
    321. 

  321.               
    322. 

  322.               <div class="pilwrap ">
    323. 

  323.                 <a class="pilcrow" href="#section-18">&#182;</a>
    324. 

  324.               </div>
    325. 

  325.               <p>Cache the template function for a single item.</p>
    326. 

  326. 

  327.             </div>
    328. 

  328.             
    329. 

  329.             <div class="content"><div class='highlight'><pre>    template: _.template($(<span class="string">'#item-template'</span>).html()),</pre></div></div>
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  330.             
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  331.         </li>
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  332.         
    333. 

  333.         
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  334.         <li id="section-19">
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  335.             <div class="annotation">
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  336.               
    337. 

  337.               <div class="pilwrap ">
    338. 

  338.                 <a class="pilcrow" href="#section-19">&#182;</a>
    339. 

  339.               </div>
    340. 

  340.               <p>The DOM events specific to an item.</p>
    341. 

  341. 

  342.             </div>
    343. 

  343.             
    344. 

  344.             <div class="content"><div class='highlight'><pre>    events: {
    345. 

  345.       <span class="string">"click .toggle"</span>   : <span class="string">"toggleDone"</span>,
    346. 

  346.       <span class="string">"dblclick .view"</span>  : <span class="string">"edit"</span>,
    347. 

  347.       <span class="string">"click a.destroy"</span> : <span class="string">"clear"</span>,
    348. 

  348.       <span class="string">"keypress .edit"</span>  : <span class="string">"updateOnEnter"</span>,
    349. 

  349.       <span class="string">"blur .edit"</span>      : <span class="string">"close"</span>
    350. 

  350.     },</pre></div></div>
    351. 

  351.             
    352. 

  352.         </li>
    353. 

  353.         
    354. 

  354.         
    355. 

  355.         <li id="section-20">
    356. 

  356.             <div class="annotation">
    357. 

  357.               
    358. 

  358.               <div class="pilwrap ">
    359. 

  359.                 <a class="pilcrow" href="#section-20">&#182;</a>
    360. 

  360.               </div>
    361. 

  361.               <p>The TodoView listens for changes to its model, re-rendering. Since there&#39;s
    362. 

  362. a one-to-one correspondence between a <strong>Todo</strong> and a <strong>TodoView</strong> in this
    363. 

  363. app, we set a direct reference on the model for convenience.</p>
    364. 

  364. 

  365.             </div>
    366. 

  366.             
    367. 

  367.             <div class="content"><div class='highlight'><pre>    initialize: <span class="keyword">function</span>() {
    368. 

  368.       <span class="keyword">this</span>.listenTo(<span class="keyword">this</span>.model, <span class="string">'change'</span>, <span class="keyword">this</span>.render);
    369. 

  369.       <span class="keyword">this</span>.listenTo(<span class="keyword">this</span>.model, <span class="string">'destroy'</span>, <span class="keyword">this</span>.remove);
    370. 

  370.     },</pre></div></div>
    371. 

  371.             
    372. 

  372.         </li>
    373. 

  373.         
    374. 

  374.         
    375. 

  375.         <li id="section-21">
    376. 

  376.             <div class="annotation">
    377. 

  377.               
    378. 

  378.               <div class="pilwrap ">
    379. 

  379.                 <a class="pilcrow" href="#section-21">&#182;</a>
    380. 

  380.               </div>
    381. 

  381.               <p>Re-render the titles of the todo item.</p>
    382. 

  382. 

  383.             </div>
    384. 

  384.             
    385. 

  385.             <div class="content"><div class='highlight'><pre>    render: <span class="keyword">function</span>() {
    386. 

  386.       <span class="keyword">this</span>.$el.html(<span class="keyword">this</span>.template(<span class="keyword">this</span>.model.toJSON()));
    387. 

  387.       <span class="keyword">this</span>.$el.toggleClass(<span class="string">'done'</span>, <span class="keyword">this</span>.model.get(<span class="string">'done'</span>));
    388. 

  388.       <span class="keyword">this</span>.input = <span class="keyword">this</span>.$(<span class="string">'.edit'</span>);
    389. 

  389.       <span class="keyword">return</span> <span class="keyword">this</span>;
    390. 

  390.     },</pre></div></div>
    391. 

  391.             
    392. 

  392.         </li>
    393. 

  393.         
    394. 

  394.         
    395. 

  395.         <li id="section-22">
    396. 

  396.             <div class="annotation">
    397. 

  397.               
    398. 

  398.               <div class="pilwrap ">
    399. 

  399.                 <a class="pilcrow" href="#section-22">&#182;</a>
    400. 

  400.               </div>
    401. 

  401.               <p>Toggle the <code>&quot;done&quot;</code> state of the model.</p>
    402. 

  402. 

  403.             </div>
    404. 

  404.             
    405. 

  405.             <div class="content"><div class='highlight'><pre>    toggleDone: <span class="keyword">function</span>() {
    406. 

  406.       <span class="keyword">this</span>.model.toggle();
    407. 

  407.     },</pre></div></div>
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  408.             
    409. 

  409.         </li>
    410. 

  410.         
    411. 

  411.         
    412. 

  412.         <li id="section-23">
    413. 

  413.             <div class="annotation">
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  414.               
    415. 

  415.               <div class="pilwrap ">
    416. 

  416.                 <a class="pilcrow" href="#section-23">&#182;</a>
    417. 

  417.               </div>
    418. 

  418.               <p>Switch this view into <code>&quot;editing&quot;</code> mode, displaying the input field.</p>
    419. 

  419. 

  420.             </div>
    421. 

  421.             
    422. 

  422.             <div class="content"><div class='highlight'><pre>    edit: <span class="keyword">function</span>() {
    423. 

  423.       <span class="keyword">this</span>.$el.addClass(<span class="string">"editing"</span>);
    424. 

  424.       <span class="keyword">this</span>.input.focus();
    425. 

  425.     },</pre></div></div>
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  426.             
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  431.             <div class="annotation">
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  433.               <div class="pilwrap ">
    434. 

  434.                 <a class="pilcrow" href="#section-24">&#182;</a>
    435. 

  435.               </div>
    436. 

  436.               <p>Close the <code>&quot;editing&quot;</code> mode, saving changes to the todo.</p>
    437. 

  437. 

  438.             </div>
    439. 

  439.             
    440. 

  440.             <div class="content"><div class='highlight'><pre>    close: <span class="keyword">function</span>() {
    441. 

  441.       <span class="keyword">var</span> value = <span class="keyword">this</span>.input.val();
    442. 

  442.       <span class="keyword">if</span> (!value) {
    443. 

  443.         <span class="keyword">this</span>.clear();
    444. 

  444.       } <span class="keyword">else</span> {
    445. 

  445.         <span class="keyword">this</span>.model.save({title: value});
    446. 

  446.         <span class="keyword">this</span>.$el.removeClass(<span class="string">"editing"</span>);
    447. 

  447.       }
    448. 

  448.     },</pre></div></div>
    449. 

  449.             
    450. 

  450.         </li>
    451. 

  451.         
    452. 

  452.         
    453. 

  453.         <li id="section-25">
    454. 

  454.             <div class="annotation">
    455. 

  455.               
    456. 

  456.               <div class="pilwrap ">
    457. 

  457.                 <a class="pilcrow" href="#section-25">&#182;</a>
    458. 

  458.               </div>
    459. 

  459.               <p>If you hit <code>enter</code>, we&#39;re through editing the item.</p>
    460. 

  460. 

  461.             </div>
    462. 

  462.             
    463. 

  463.             <div class="content"><div class='highlight'><pre>    updateOnEnter: <span class="keyword">function</span>(e) {
    464. 

  464.       <span class="keyword">if</span> (e.keyCode == <span class="number">13</span>) <span class="keyword">this</span>.close();
    465. 

  465.     },</pre></div></div>
    466. 

  466.             
    467. 

  467.         </li>
    468. 

  468.         
    469. 

  469.         
    470. 

  470.         <li id="section-26">
    471. 

  471.             <div class="annotation">
    472. 

  472.               
    473. 

  473.               <div class="pilwrap ">
    474. 

  474.                 <a class="pilcrow" href="#section-26">&#182;</a>
    475. 

  475.               </div>
    476. 

  476.               <p>Remove the item, destroy the model.</p>
    477. 

  477. 

  478.             </div>
    479. 

  479.             
    480. 

  480.             <div class="content"><div class='highlight'><pre>    clear: <span class="keyword">function</span>() {
    481. 

  481.       <span class="keyword">this</span>.model.destroy();
    482. 

  482.     }
    483. 

  483. 

  484.   });</pre></div></div>
    485. 

  485.             
    486. 

  486.         </li>
    487. 

  487.         
    488. 

  488.         
    489. 

  489.         <li id="section-27">
    490. 

  490.             <div class="annotation">
    491. 

  491.               
    492. 

  492.               <div class="pilwrap for-h2">
    493. 

  493.                 <a class="pilcrow" href="#section-27">&#182;</a>
    494. 

  494.               </div>
    495. 

  495.               <h2>The Application</h2>
    496. 

  496. 

  497.             </div>
    498. 

  498.             
    499. 

  499.         </li>
    500. 

  500.         
    501. 

  501.         
    502. 

  502.         <li id="section-28">
    503. 

  503.             <div class="annotation">
    504. 

  504.               
    505. 

  505.               <div class="pilwrap ">
    506. 

  506.                 <a class="pilcrow" href="#section-28">&#182;</a>
    507. 

  507.               </div>
    508. 

  508.               <p>Our overall <strong>AppView</strong> is the top-level piece of UI.</p>
    509. 

  509. 

  510.             </div>
    511. 

  511.             
    512. 

  512.             <div class="content"><div class='highlight'><pre>  <span class="keyword">var</span> AppView = Backbone.View.extend({</pre></div></div>
    513. 

  513.             
    514. 

  514.         </li>
    515. 

  515.         
    516. 

  516.         
    517. 

  517.         <li id="section-29">
    518. 

  518.             <div class="annotation">
    519. 

  519.               
    520. 

  520.               <div class="pilwrap ">
    521. 

  521.                 <a class="pilcrow" href="#section-29">&#182;</a>
    522. 

  522.               </div>
    523. 

  523.               <p>Instead of generating a new element, bind to the existing skeleton of
    524. 

  524. the App already present in the HTML.</p>
    525. 

  525. 

  526.             </div>
    527. 

  527.             
    528. 

  528.             <div class="content"><div class='highlight'><pre>    el: $(<span class="string">"#todoapp"</span>),</pre></div></div>
    529. 

  529.             
    530. 

  530.         </li>
    531. 

  531.         
    532. 

  532.         
    533. 

  533.         <li id="section-30">
    534. 

  534.             <div class="annotation">
    535. 

  535.               
    536. 

  536.               <div class="pilwrap ">
    537. 

  537.                 <a class="pilcrow" href="#section-30">&#182;</a>
    538. 

  538.               </div>
    539. 

  539.               <p>Our template for the line of statistics at the bottom of the app.</p>
    540. 

  540. 

  541.             </div>
    542. 

  542.             
    543. 

  543.             <div class="content"><div class='highlight'><pre>    statsTemplate: _.template($(<span class="string">'#stats-template'</span>).html()),</pre></div></div>
    544. 

  544.             
    545. 

  545.         </li>
    546. 

  546.         
    547. 

  547.         
    548. 

  548.         <li id="section-31">
    549. 

  549.             <div class="annotation">
    550. 

  550.               
    551. 

  551.               <div class="pilwrap ">
    552. 

  552.                 <a class="pilcrow" href="#section-31">&#182;</a>
    553. 

  553.               </div>
    554. 

  554.               <p>Delegated events for creating new items, and clearing completed ones.</p>
    555. 

  555. 

  556.             </div>
    557. 

  557.             
    558. 

  558.             <div class="content"><div class='highlight'><pre>    events: {
    559. 

  559.       <span class="string">"keypress #new-todo"</span>:  <span class="string">"createOnEnter"</span>,
    560. 

  560.       <span class="string">"click #clear-completed"</span>: <span class="string">"clearCompleted"</span>,
    561. 

  561.       <span class="string">"click #toggle-all"</span>: <span class="string">"toggleAllComplete"</span>
    562. 

  562.     },</pre></div></div>
    563. 

  563.             
    564. 

  564.         </li>
    565. 

  565.         
    566. 

  566.         
    567. 

  567.         <li id="section-32">
    568. 

  568.             <div class="annotation">
    569. 

  569.               
    570. 

  570.               <div class="pilwrap ">
    571. 

  571.                 <a class="pilcrow" href="#section-32">&#182;</a>
    572. 

  572.               </div>
    573. 

  573.               <p>At initialization we bind to the relevant events on the <code>Todos</code>
    574. 

  574. collection, when items are added or changed. Kick things off by
    575. 

  575. loading any preexisting todos that might be saved in <em>localStorage</em>.</p>
    576. 

  576. 

  577.             </div>
    578. 

  578.             
    579. 

  579.             <div class="content"><div class='highlight'><pre>    initialize: <span class="keyword">function</span>() {
    580. 

  580. 

  581.       <span class="keyword">this</span>.input = <span class="keyword">this</span>.$(<span class="string">"#new-todo"</span>);
    582. 

  582.       <span class="keyword">this</span>.allCheckbox = <span class="keyword">this</span>.$(<span class="string">"#toggle-all"</span>)[<span class="number">0</span>];
    583. 

  583. 

  584.       <span class="keyword">this</span>.listenTo(Todos, <span class="string">'add'</span>, <span class="keyword">this</span>.addOne);
    585. 

  585.       <span class="keyword">this</span>.listenTo(Todos, <span class="string">'reset'</span>, <span class="keyword">this</span>.addAll);
    586. 

  586.       <span class="keyword">this</span>.listenTo(Todos, <span class="string">'all'</span>, <span class="keyword">this</span>.render);
    587. 

  587. 

  588.       <span class="keyword">this</span>.footer = <span class="keyword">this</span>.$(<span class="string">'footer'</span>);
    589. 

  589.       <span class="keyword">this</span>.main = $(<span class="string">'#main'</span>);
    590. 

  590. 

  591.       Todos.fetch();
    592. 

  592.     },</pre></div></div>
    593. 

  593.             
    594. 

  594.         </li>
    595. 

  595.         
    596. 

  596.         
    597. 

  597.         <li id="section-33">
    598. 

  598.             <div class="annotation">
    599. 

  599.               
    600. 

  600.               <div class="pilwrap ">
    601. 

  601.                 <a class="pilcrow" href="#section-33">&#182;</a>
    602. 

  602.               </div>
    603. 

  603.               <p>Re-rendering the App just means refreshing the statistics -- the rest
    604. 

  604. of the app doesn&#39;t change.</p>
    605. 

  605. 

  606.             </div>
    607. 

  607.             
    608. 

  608.             <div class="content"><div class='highlight'><pre>    render: <span class="keyword">function</span>() {
    609. 

  609.       <span class="keyword">var</span> done = Todos.done().length;
    610. 

  610.       <span class="keyword">var</span> remaining = Todos.remaining().length;
    611. 

  611. 

  612.       <span class="keyword">if</span> (Todos.length) {
    613. 

  613.         <span class="keyword">this</span>.main.show();
    614. 

  614.         <span class="keyword">this</span>.footer.show();
    615. 

  615.         <span class="keyword">this</span>.footer.html(<span class="keyword">this</span>.statsTemplate({done: done, remaining: remaining}));
    616. 

  616.       } <span class="keyword">else</span> {
    617. 

  617.         <span class="keyword">this</span>.main.hide();
    618. 

  618.         <span class="keyword">this</span>.footer.hide();
    619. 

  619.       }
    620. 

  620. 

  621.       <span class="keyword">this</span>.allCheckbox.checked = !remaining;
    622. 

  622.     },</pre></div></div>
    623. 

  623.             
    624. 

  624.         </li>
    625. 

  625.         
    626. 

  626.         
    627. 

  627.         <li id="section-34">
    628. 

  628.             <div class="annotation">
    629. 

  629.               
    630. 

  630.               <div class="pilwrap ">
    631. 

  631.                 <a class="pilcrow" href="#section-34">&#182;</a>
    632. 

  632.               </div>
    633. 

  633.               <p>Add a single todo item to the list by creating a view for it, and
    634. 

  634. appending its element to the <code>&lt;ul&gt;</code>.</p>
    635. 

  635. 

  636.             </div>
    637. 

  637.             
    638. 

  638.             <div class="content"><div class='highlight'><pre>    addOne: <span class="keyword">function</span>(todo) {
    639. 

  639.       <span class="keyword">var</span> view = <span class="keyword">new</span> TodoView({model: todo});
    640. 

  640.       <span class="keyword">this</span>.$(<span class="string">"#todo-list"</span>).append(view.render().el);
    641. 

  641.     },</pre></div></div>
    642. 

  642.             
    643. 

  643.         </li>
    644. 

  644.         
    645. 

  645.         
    646. 

  646.         <li id="section-35">
    647. 

  647.             <div class="annotation">
    648. 

  648.               
    649. 

  649.               <div class="pilwrap ">
    650. 

  650.                 <a class="pilcrow" href="#section-35">&#182;</a>
    651. 

  651.               </div>
    652. 

  652.               <p>Add all items in the <strong>Todos</strong> collection at once.</p>
    653. 

  653. 

  654.             </div>
    655. 

  655.             
    656. 

  656.             <div class="content"><div class='highlight'><pre>    addAll: <span class="keyword">function</span>() {
    657. 

  657.       Todos.each(<span class="keyword">this</span>.addOne, <span class="keyword">this</span>);
    658. 

  658.     },</pre></div></div>
    659. 

  659.             
    660. 

  660.         </li>
    661. 

  661.         
    662. 

  662.         
    663. 

  663.         <li id="section-36">
    664. 

  664.             <div class="annotation">
    665. 

  665.               
    666. 

  666.               <div class="pilwrap ">
    667. 

  667.                 <a class="pilcrow" href="#section-36">&#182;</a>
    668. 

  668.               </div>
    669. 

  669.               <p>If you hit return in the main input field, create new <strong>Todo</strong> model,
    670. 

  670. persisting it to <em>localStorage</em>.</p>
    671. 

  671. 

  672.             </div>
    673. 

  673.             
    674. 

  674.             <div class="content"><div class='highlight'><pre>    createOnEnter: <span class="keyword">function</span>(e) {
    675. 

  675.       <span class="keyword">if</span> (e.keyCode != <span class="number">13</span>) <span class="keyword">return</span>;
    676. 

  676.       <span class="keyword">if</span> (!<span class="keyword">this</span>.input.val()) <span class="keyword">return</span>;
    677. 

  677. 

  678.       Todos.create({title: <span class="keyword">this</span>.input.val()});
    679. 

  679.       <span class="keyword">this</span>.input.val(<span class="string">''</span>);
    680. 

  680.     },</pre></div></div>
    681. 

  681.             
    682. 

  682.         </li>
    683. 

  683.         
    684. 

  684.         
    685. 

  685.         <li id="section-37">
    686. 

  686.             <div class="annotation">
    687. 

  687.               
    688. 

  688.               <div class="pilwrap ">
    689. 

  689.                 <a class="pilcrow" href="#section-37">&#182;</a>
    690. 

  690.               </div>
    691. 

  691.               <p>Clear all done todo items, destroying their models.</p>
    692. 

  692. 

  693.             </div>
    694. 

  694.             
    695. 

  695.             <div class="content"><div class='highlight'><pre>    clearCompleted: <span class="keyword">function</span>() {
    696. 

  696.       _.invoke(Todos.done(), <span class="string">'destroy'</span>);
    697. 

  697.       <span class="keyword">return</span> <span class="literal">false</span>;
    698. 

  698.     },
    699. 

  699. 

  700.     toggleAllComplete: <span class="function"><span class="keyword">function</span> <span class="params">()</span> {</span>
    701. 

  701.       <span class="keyword">var</span> done = <span class="keyword">this</span>.allCheckbox.checked;
    702. 

  702.       Todos.each(<span class="function"><span class="keyword">function</span> <span class="params">(todo)</span> {</span> todo.save({<span class="string">'done'</span>: done}); });
    703. 

  703.     }
    704. 

  704. 

  705.   });</pre></div></div>
    706. 

  706.             
    707. 

  707.         </li>
    708. 

  708.         
    709. 

  709.         
    710. 

  710.         <li id="section-38">
    711. 

  711.             <div class="annotation">
    712. 

  712.               
    713. 

  713.               <div class="pilwrap ">
    714. 

  714.                 <a class="pilcrow" href="#section-38">&#182;</a>
    715. 

  715.               </div>
    716. 

  716.               <p>Finally, we kick things off by creating the <strong>App</strong>.</p>
    717. 

  717. 

  718.             </div>
    719. 

  719.             
    720. 

  720.             <div class="content"><div class='highlight'><pre>  <span class="keyword">var</span> App = <span class="keyword">new</span> AppView;
    721. 

  721. 

  722. });</pre></div></div>
    723. 

  723.             
    724. 

  724.         </li>
    725. 

  725.         
    726. 

  726.     </ul>
    727. 

  727.   </div>
    728. 

  728. </body>
    729. 

  729. </html>
    730. 

  730.