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POSencha Touch 2 - Correct way to add listeners in the MVC?
 

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    <p>Today I have a small question regarding what the correct/best way is to add listeners using Sencha Touch 2 via it's recommended MVC model.</p> <p>As far as I can see, there are two main ways that I have been presented with to add listeners to the various components across my views.</p> <p><strong>1. In the controller.</strong></p> <p>I came across this method while reading the MVC documents for ExtJS 4.0 (no MVC docs for touch yet). It goes like so:</p> <pre><code>init: function() { console.log ('Launched the controller'); //listening test //the Control function/method is unique to controllers and is used to add listeners to stuff this.control({ 'button': { 'tap' : function (){ console.log('the buttons speak!'); } }, } </code></pre> <p>The above code would reside inside the main controller, for instance. Here, as you can see, I am adding a "tap" listener to ALL buttons across the entire app. </p> <p>As far as I know, to access specific components in this way, I would need to tag them each with a unique ID and then use componentquery at this location to place listners onto them.</p> <p>Question: I think this method is pretty cool... but I have run across problems using it in lists... sometimes I want to listen to a specific list item for things like "tapstart" and "tapend" but since usually listItems are dynamically created as children to a list... I have no idea how to give them unique IDs and/or find them using the query engine (due to my inexperience I guess? I haven't been able to google/find anything about it in the docs that makes sense).</p> <p><strong>2. During the init/config of individual components</strong></p> <p>The other method that I came across to add listeners to components is to define the listener, it's callback and the event it's listening to directly in the component config.</p> <p>Example: </p> <pre><code>Ext.define('Paythread.view.CommentList', { extend: 'Ext.Panel', alias: 'widget.CommentList', layout: 'vbox', config : { items: [ { xtype: 'list', layout: 'fit', //fullscreen: true, height: 'viewport.height', store: 'Comments', onItemTap: function(){ //do stuff }, pressedDelay: 20, //HOLY CRAP IMPORTANT FOR UX itemTpl: '&lt;h1&gt;{user_id}&lt;/h1&gt;&lt;h2&gt;{comment}&lt;/h2&gt;' } ] }, }); </code></pre> <p>As you can see from this code, I have created a "onItemTap" listener function, and this seems to work pretty darn well. However... it scares me for some reason and I have no idea if what I am doing is correct or not.</p> <p>Could anyone provide some help as to whether I am doing the right thing, if I should be doing this a different way, or if I am completely off track and shouldn't even be defining listeners like this in the first place?</p> <p>I would really appreciate any help given! Thank you very much everyone.</p>
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