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<?php
/**
* TExpression class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.xisc.com/
* @copyright Copyright © 2004-2005, Qiang Xue
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
*/
/**
* TExpression class
*
* TExpression evaluates a PHP expression and renders the result.
* The expression is evaluated during rendering stage. You can set
* it via the property <b>Expression</b>. You should also specify
* the context object by <b>Context</b> property which is used as
* the object in which the expression is evaluated. If the <b>Context</b>
* property is not set, the TExpression component itself will be
* assumed as the context.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
* @since 3.0
*/
class TExpression extends TControl
{
private $_e='';
/**
* @return string the expression to be evaluated
*/
public function getExpression()
{
return $this->_e;
}
/**
* Sets the expression of the TExpression
* @param string the expression to be set
*/
public function setExpression($value)
{
$this->_e=$value;
}
/**
* Renders the evaluation result of the expression.
* @param THtmlWriter the writer used for the rendering purpose
*/
protected function render($writer)
{
if($this->_e!=='')
$writer->write($this->evaluateExpression($this->_e));
}
}
?>
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