Passing controller to view problems

[novadys-sbu]

Hello everyone

So I need a button in my mobile app to download a document.
My problem is with the binding between my view and my controller.
It seems that quite a few people have had this problem. Is there any way out ?
Here is my code :

In my view I have a button like so

{
                    id: 'downloadButton',
                    xtype: 'button',
                    scope: this,
                    text: 'Download',
                    handler:function(){
                        Ext.Msg.alert("Download button tapped");
                        //CALL CONTROLLER HERE ???
                    }
                    }

And this is my controller :

Ext.define('documind.controller.DocumentController',{    //Init params
    extend: 'Ext.app.Controller',
    stores: ['Archives'],
    models: ['Viewer'],
    views: ['Viewer'],
    singleton: true,
    alias: 'DocumentController',
    
    /**
    * Main function of the controller
    * It redirects the user event to the corresponding function
    * Created : 30-12-12
    * Author : Sarah Burrell
    */
    init:function(){
         this.control({
            'viewViewer':{
                downloadButton : this.downloadDocument
            }                
         });
    },
    downloadDocument: function(){
        console.log("Download document");
    } 
    
});

If anyone has any ideas I will be very very grateful !!

Sarah