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1. ./code/community/Zendesk/Zendesk/Block/Adminhtml/Dashboard/Grids.php

$this->getLayout()->createBlock('zendesk/adminhtml_dashboard_tab_tickets_grid_all')->toHtml();

./code/community/Zendesk/Zendesk/Block/Adminhtml/Create/Order.php:40:        

return $this->getLayout()->createBlock('adminhtml/widget_button')->setData($addButtonData)->toHtml();

./code/community/Zendesk/Zendesk/Block/Adminhtml/Create/Order.php:40:        

return $this->getLayout()->createBlock('adminhtml/widget_button')->setData($addButtonData)->toHtml();

 

 

class Aschroder_SMTPPro_Block_Adminhtml_Test

    extends Mage_Adminhtml_Block_System_Config_Form_Field {

    protected function _getElementHtml(Varien_Data_Form_Element_Abstract $element)     {         $this->setElement($element);         $buttonHtml = $this->_getAddRowButtonHtml($this->__('Run Self Test'));         return $buttonHtml;     }

   protected function _getAddRowButtonHtml($title)   {

        $buttonBlock = $this->getElement()->getForm()->getParent()->getLayout()->createBlock('adminhtml/widget_button');

        $_websiteCode = $buttonBlock->getRequest()->getParam('website', null);

        $params = array();

        if(!empty($_websiteCode)) {

            $params['website'] = $_websiteCode;         }

        // TODO: for real multi-store self-testing, the test button (and other configuration options)

        // should probably be set to show in website. Currently they are not.         $url = Mage::helper('adminhtml')->getUrl("*/smtp_test/index", $params);

        $buttonHtml = $this->getLayout()->createBlock('adminhtml/widget_button')

                    ->setType('button')                     ->setLabel($this->__($title))                     ->setOnClick("window.location.href='".$url."'")                     ->toHtml();

        return $buttonHtml;

    }

}

直接创建一个block，然后加入到配置中

```

public function indexAction() { //Get current layout state $this->loadLayout();   $block = $this->getLayout()->createBlock( 'Mage_Core_Block_Template', 'my_block_name_here', array('template' => 'activecodeline/developer.phtml') );

// 从layout中得到一个已有的block，然后将上面创建的加入的写法。

$this->getLayout()->getBlock('content')->append($block);   //Release layout stream... lol... sounds fancy $this->renderLayout(); }

```

```     public function indexAction(){         $this->loadLayout();         $this->_initLayoutMessages('customer/session');         $this->renderLayout();     } ```

2.代码剖析

上面是在controller和block可以被执行中执行的

2.1 $this->getLayout()

2.1.1 block： Mage_Core_Block_Abstract

 

    /**

     * Retrieve layout object      *      * @return Mage_Core_Model_Layout      */     public function getLayout()     {         return $this->_layout;     }

返回的是：Mage_Core_Model_Layout

2.1.2 controller: Mage_Core_Controller_Varien_Action

 

/**

     * Retrieve current layout object      *      * @return Mage_Core_Model_Layout      */     public function getLayout()     {         return Mage::getSingleton('core/layout');     }

 

本质就是：单例模式的core/layout  model:

Mage::getSingleton('core/layout');

 

2.2 loadLayout

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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