<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
 
// Access check.
if (!JFactory::getUser()->authorise('core.manage', 'com_helloworld')) 
{
	return JError::raiseWarning(404, JText::_('JERROR_ALERTNOAUTHOR'));
}
 
// require helper file
JLoader::register('HelloWorldHelper', dirname(__FILE__) . DS . 'helpers' . DS . 'helloworld.php');
 
// import joomla controller library
jimport('joomla.application.component.controller');
 
// Get an instance of the controller prefixed by HelloWorld
$controller = JController::getInstance('HelloWorld');
 
// Perform the Request task
$controller->execute(JRequest::getCmd('task'));
 
// Redirect if set by the controller
$controller->redirect();

// Access check.
if (!JFactory::getUser()->authorise('core.manage', 'com_helloworld')) 
{
	return JError::raiseWarning(404, JText::_('JERROR_ALERTNOAUTHOR'));
}

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
 
// import Joomla view library
jimport('joomla.application.component.view');
 
/**
 * HelloWorlds View
 */
class HelloWorldViewHelloWorlds extends JView
{
	/**
	 * HelloWorlds view display method
	 * @return void
	 */
	function display($tpl = null) 
	{
		// Get data from the model
		$items = $this->get('Items');
		$pagination = $this->get('Pagination');
 
		// Check for errors.
		if (count($errors = $this->get('Errors'))) 
		{
			JError::raiseError(500, implode('<br />', $errors));
			return false;
		}
		// Assign data to the view
		$this->items = $items;
		$this->pagination = $pagination;
 
		// Set the toolbar
		$this->addToolBar();
 
		// Display the template
		parent::display($tpl);
 
		// Set the document
		$this->setDocument();
	}
 
	/**
	 * Setting the toolbar
	 */
	protected function addToolBar() 
	{
		$canDo = HelloWorldHelper::getActions();
		JToolBarHelper::title(JText::_('COM_HELLOWORLD_MANAGER_HELLOWORLDS'), 'helloworld');
		if ($canDo->get('core.create')) 
		{
			JToolBarHelper::addNew('helloworld.add', 'JTOOLBAR_NEW');
		}
		if ($canDo->get('core.edit')) 
		{
			JToolBarHelper::editList('helloworld.edit', 'JTOOLBAR_EDIT');
		}
		if ($canDo->get('core.delete')) 
		{
			JToolBarHelper::deleteList('', 'helloworlds.delete', 'JTOOLBAR_DELETE');
		}
		if ($canDo->get('core.admin')) 
		{
			JToolBarHelper::divider();
			JToolBarHelper::preferences('com_helloworld');
		}
	}
	/**
	 * Method to set up the document properties
	 *
	 * @return void
	 */
	protected function setDocument() 
	{
		$document = JFactory::getDocument();
		$document->setTitle(JText::_('COM_HELLOWORLD_ADMINISTRATION'));
	}
}

<?php
// No direct access to this file
defined('_JEXEC') or die('Restricted access');
 
// import Joomla view library
jimport('joomla.application.component.view');
 
/**
 * HelloWorld View
 */
class HelloWorldViewHelloWorld extends JView
{
	/**
	 * display method of Hello view
	 * @return void
	 */
	public function display($tpl = null) 
	{
		// get the Data
		$form = $this->get('Form');
		$item = $this->get('Item');
		$script = $this->get('Script');
 
		// Check for errors.
		if (count($errors = $this->get('Errors'))) 
		{
			JError::raiseError(500, implode('<br />', $errors));
			return false;
		}
		// Assign the Data
		$this->form = $form;
		$this->item = $item;
		$this->script = $script;
		$this->canDo = HelloWorldHelper::getActions($this->item->id);
		// Set the toolbar
		$this->addToolBar();
 
		// Display the template
		parent::display($tpl);
 
		// Set the document
		$this->setDocument();
	}
 
	/**
	 * Setting the toolbar
	 */
	protected function addToolBar() 
	{
		JRequest::setVar('hidemainmenu', true);
		$user = JFactory::getUser();
		$userId = $user->id;
		$isNew = $this->item->id == 0;
		$canDo = HelloWorldHelper::getActions($this->item->id);
		JToolBarHelper::title($isNew ? JText::_('COM_HELLOWORLD_MANAGER_HELLOWORLD_NEW') : 
                                               JText::_('COM_HELLOWORLD_MANAGER_HELLOWORLD_EDIT'), 'helloworld');
		// Built the actions for new and existing records.
		if ($isNew) 
		{
			// For new records, check the create permission.
			if ($canDo->get('core.create')) 
			{
				JToolBarHelper::apply('helloworld.apply', 'JTOOLBAR_APPLY');
				JToolBarHelper::save('helloworld.save', 'JTOOLBAR_SAVE');
				JToolBarHelper::custom('helloworld.save2new', 'save-new.png', 
                                                       'save-new_f2.png', 'JTOOLBAR_SAVE_AND_NEW', false);
			}
			JToolBarHelper::cancel('helloworld.cancel', 'JTOOLBAR_CANCEL');
		}
		else
		{
			if ($canDo->get('core.edit'))
			{
				// We can save the new record
				JToolBarHelper::apply('helloworld.apply', 'JTOOLBAR_APPLY');
				JToolBarHelper::save('helloworld.save', 'JTOOLBAR_SAVE');
 
				// We can save this record, but check the create permission to see if we can 
                                //return to make a new one.
				if ($canDo->get('core.create')) 
				{
					JToolBarHelper::custom('helloworld.save2new', 'save-new.png', 
                                                               'save-new_f2.png', 'JTOOLBAR_SAVE_AND_NEW', false);
				}
			}
			if ($canDo->get('core.create')) 
			{
				JToolBarHelper::custom('helloworld.save2copy', 'save-copy.png', 
                                                       'save-copy_f2.png', 'JTOOLBAR_SAVE_AS_COPY', false);
			}
			JToolBarHelper::cancel('helloworld.cancel', 'JTOOLBAR_CLOSE');
		}
	}
	/**
	 * Method to set up the document properties
	 *
	 * @return void
	 */
	protected function setDocument() 
	{
		$isNew = $this->item->id == 0;
		$document = JFactory::getDocument();
		$document->setTitle($isNew ? JText::_('COM_HELLOWORLD_HELLOWORLD_CREATING') : 
                                             JText::_('COM_HELLOWORLD_HELLOWORLD_EDITING'));
		$document->addScript(JURI::root() . $this->script);
	$document->addScript(JURI::root() . "/administrator/components/com_helloworld/views/helloworld/submitbutton.js");
		JText::script('COM_HELLOWORLD_HELLOWORLD_ERROR_UNACCEPTABLE');
	}
}

<?php
// No direct access to this file
defined('_JEXEC') or die;
 
/**
 * HelloWorld component helper.
 */
abstract class HelloWorldHelper
{
	/**
	 * Configure the Linkbar.
	 */
	public static function addSubmenu($submenu) 
	{
	        JSubMenuHelper::addEntry(JText::_('COM_HELLOWORLD_SUBMENU_MESSAGES'), 
                                                  'index.php?option=com_helloworld', $submenu == 'messages');
		JSubMenuHelper::addEntry(JText::_('COM_HELLOWORLD_SUBMENU_CATEGORIES'), 
                                                  'index.php?option=com_categories&view=categories&extension=com_helloworld', 
                                                  $submenu == 'categories');
		// set some global property
		$document = JFactory::getDocument();
		$document->addStyleDeclaration('.icon-48-helloworld {background-image: url('/../media/com_helloworld/images/hello_icon48.png');}');
		if ($submenu == 'categories') 
		{
			$document->setTitle(JText::_('COM_HELLOWORLD_ADMINISTRATION_CATEGORIES'));
		}
	}
	/**
	 * Get the actions
	 */
	public static function getActions($messageId = 0)
	{	
		jimport('joomla.access.access');
		$user	= JFactory::getUser();
		$result	= new JObject;
 
		if (empty($messageId)) {
			$assetName = 'com_helloworld';
		}
		else {
			$assetName = 'com_helloworld.message.'.(int) $messageId;
		}
 
		$actions = JAccess::getActions('com_helloworld', 'component');
 
		foreach ($actions as $action) {
			$result->set($action->name, $user->authorise($action->name, $assetName));
		}
 
		return $result;
	}
}