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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\base;
use Yii;
use yii\helpers\FileHelper;
/**
* Widget is the base class for widgets.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class Widget extends Component
{
/**
* @var Widget|Controller the owner/creator of this widget. It could be either a widget or a controller.
*/
public $owner;
/**
* @var string id of the widget.
*/
private $_id;
/**
* @var integer a counter used to generate IDs for widgets.
*/
private static $_counter = 0;
/**
* Constructor.
* @param Widget|Controller $owner owner/creator of this widget.
* @param array $config name-value pairs that will be used to initialize the object properties
*/
public function __construct($owner, $config = array())
{
$this->owner = $owner;
parent::__construct($config);
}
/**
* Returns the ID of the widget.
* @param boolean $autoGenerate whether to generate an ID if it is not set previously
* @return string ID of the widget.
*/
public function getId($autoGenerate = true)
{
if ($autoGenerate && $this->_id === null) {
$this->_id = 'w' . self::$_counter++;
}
return $this->_id;
}
/**
* Sets the ID of the widget.
* @param string $value id of the widget.
*/
public function setId($value)
{
$this->_id = $value;
}
/**
* Executes the widget.
*/
public function run()
{
}
/**
* Renders a view.
* @param string $view the view name. Please refer to [[findViewFile()]] on how to specify a view name.
* @param array $params the parameters (name-value pairs) that should be made available in the view.
* @return string the rendering result.
* @throws InvalidParamException if the view file does not exist.
*/
public function render($view, $params = array())
{
return Yii::$app->getView()->render($view, $params, $this);
}
/**
* Renders a view file.
* @param string $file the view file to be rendered. This can be either a file path or a path alias.
* @param array $params the parameters (name-value pairs) that should be made available in the view.
* @return string the rendering result.
* @throws InvalidParamException if the view file does not exist.
*/
public function renderFile($file, $params = array())
{
return Yii::$app->getView()->renderFile($file, $params, $this);
}
/**
* Returns the directory containing the view files for this widget.
* The default implementation returns the 'views' subdirectory under the directory containing the widget class file.
* @return string the directory containing the view files for this widget.
*/
public function getViewPath()
{
$className = get_class($this);
$class = new \ReflectionClass($className);
return dirname($class->getFileName()) . DIRECTORY_SEPARATOR . 'views';
}
}