joomla3.0 - Joomla 3.0 One component with multiple views -

i'm new joomla , i'm trying build single component shows categories of items, , when category clicked, leads second view listing relevant items. now, can first view working. not sure base file, controller, , view files second view working. tried looking answer several days couldn't find relevant.

i want keep in single controller , choose correct view based on requested task. now, have request as

index.php?option=com_products&task=listing&cat= 

there's going 3 total tasks, 3 total views. therefore didn't want bother multiple controllers.

1. is possible have 1 controller choose between 3 different views? if yes, how?
2. would having multiple views necessitate multiple controllers, keep mvc style? if yes, how do that?

structure:

com_categories ---categories.php ---controller.php ---models\categories.php ---models\listing.php ---views\categories\view.html.php ---views\categories\tmpl\default.php ---views\listing\view.html.php ---views\listing\tmpl\default.php 

categories.php

$controller = jcontrollerlegacy::getinstance('categories');  $controller->execute(jrequest::getcmd('task'));  $controller->redirect(); 

controller.php

class categoriescontroller extends jcontrollerlegacy {    /*    *  main controller: shows categories    *  chosen default.    */    function display()    {       $view = $this->getview( 'categories', 'html' );       $view->setmodel($this->getmodel('categories'), true );       $view->setlayout( 'default' );       $view->display();    }     /*    *  listing controller: shows list of items after category clicked    */    function listing()    {       // passes category id model       $cat = jrequest::getvar( 'cat', '1' );       $model = $this->getmodel('listing');       $model->setstate('cat', $cat);        $view = $this->getview( 'listing', 'html' );       $view->setmodel($model, true );       $view->setlayout( 'default' );       $view->display();     } } 

listing\view.html.php

class categoriesviewlisting extends jviewlegacy {     function display($tpl = null)      {         $doc =& jfactory::getdocument();          // assign data view         $this->item = $this->get('products');         $this->title = $this->get('category');          // display view         parent::display($tpl);     } } 

if needs views there no need use sub controllers. instead of using task=taskname use view=viewname , add view folder inside /components/com_name/views (copy 1 of existing).

or skip , build using component creator.