title: How to catch imageclick event in controller of extjs4
body: <p>I am working in extjs4. i have extjs view  as-</p>
  
  <pre><code>Ext.define('Balaee.view.kp.Word.SearchWord', {
  extend:'Ext.form.Panel',
      id:'WordId',
      alias:'widget.SearchWord',
      bodyPadding: 30,
      defaults:{
          margin:'0 20 0 70'
      },
      layout: {
          type: 'hbox'
     },
  
              items:[
                     {
  
                         xtype:'textfield',
                         fieldLabel:'Enter the Word:',
                         name:'Word',
                       //  height:30,
                         border:false,
                         allowBlank:false,
                         emptyText: 'Enter the word',
                         id:'wordtext'
                     },
                     {
                         xtype: 'image',
                          width: 30,
                          height: 22,
                          src: 'http://www.asien-news.de/wp-content/uploads/new-york.jpg',
                    }
                     ],});
  </code></pre>
  
  <p>I want to call controller's function on click of above image. So how to catch image click event in controller?</p>