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<?php
/**
* TCustomValidator class file
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the BSD License.
*
* Copyright(c) 2004 by Qiang Xue. All rights reserved.
*
* To contact the author write to {@link mailto:qiang.xue@gmail.com Qiang Xue}
* The latest version of PRADO can be obtained from:
* {@link http://prado.sourceforge.net/}
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Revision: 1.7 $ $Date: 2005/06/13 07:04:28 $
* @package System.Web.UI.WebControls
*/
/**
* TValidator class file
*/
require_once(dirname(__FILE__).'/TValidator.php');
/**
* TCustomValidator class
*
* TCustomValidator performs user-defined validation (either
* server-side or client-side or both) on an input component.
*
* To create a server-side validation function, provide a handler for
* the <b>OnServerValidate</b> event that performs the validation.
* The data string of the input component to validate can be accessed
* by the <b>value</b> property of the event parameter which is of type
* <b>TServerValidateEventParameter</b>. The result of the validation
* should be stored in the <b>isValid</b> property of the event parameter.
*
* To create a client-side validation function, add the client-side
* validation javascript function to the page template.
* The function should have the following signature:
* <code>
* <script type="text/javascript"><!--
* function ValidationFunctionName(sender, parameter)
* {
* // if(parameter == ...)
* // return true;
* // else
* // return false;
* }
* --></script>
* </code>
* Use the <b>ClientValidationFunction</b> property to specify the name of
* the client-side validation script function associated with the TCustomValidator.
*
* Namespace: System.Web.UI.WebControls
*
* Properties
* - <b>ClientValidationFunction</b>, string, kept in viewstate
* <br>Gets or sets the name of the custom client-side script function used for validation.
*
* Events
* - <b>OnServerValidate</b> Occurs when validation is performed on the server.
* <br>Event delegates must set the event parameter TServerValidateEventParameter.isValid
* to false if they find the value is invalid.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version v1.0, last update on 2004/08/13 21:44:52
* @package System.Web.UI.WebControls
*/
class TCustomValidator extends TValidator
{
/**
* @return string the name of the custom client-side script function used for validation.
*/
public function getClientValidationFunction()
{
return $this->getViewState('ClientValidationFunction','');
}
/**
* Sets the name of the custom client-side script function used for validation.
* @param string the script function name
*/
public function setClientValidationFunction($value)
{
$this->setViewState('ClientValidationFunction',$value,'');
}
/**
* This method overrides the parent's implementation.
* The validation succeeds if {@link onServerValidate} returns true.
* @return boolean whether the validation succeeds
*/
public function evaluateIsValid()
{
$idPath=$this->getControlToValidate();
if(strlen($idPath))
{
$control=$this->getTargetControl($idPath);
$value=$control->getValidationPropertyValue($idPath);
return $this->onServerValidate($value);
}
else
return true;
}
/**
* This method is invoked when the server side validation happens.
* It will raise the <b>OnServerValidate</b> event.
* The method also allows derived classes to handle the event without attaching a delegate.
* <b>Note</b> The derived classes should call parent implementation
* to ensure the <b>OnServerValidate</b> event is raised.
* @param string the value to be validated
* @return boolean whether the value is valid
*/
public function onServerValidate($value)
{
$param=new TServerValidateEventParameter;
$param->value=$value;
$param->isValid=true;
$this->raiseEvent('OnServerValidate',$this,$param);
return $param->isValid;
}
/**
* Get a list of options for the client-side javascript validator
* @return array list of options for the validator
*/
protected function getJsOptions()
{
$options = parent::getJsOptions();
$clientJs = $this->getClientValidationFunction();
if(strlen($clientJs))
$options['clientvalidationfunction']=$clientJs;
return $options;
}
}
/**
* TServerValidateEventParameter class
*
* TServerValidateEventParameter encapsulates the parameter data for
* <b>OnServerValidate</b> event of TCustomValidator components.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version v1.0, last update on 2004/08/13 21:44:52
* @package System.Web.UI.WebControls
*/
class TServerValidateEventParameter extends TEventParameter
{
/**
* the value to be validated
* @var string
*/
public $value='';
/**
* whether the value is valid
* @var boolean
*/
public $isValid=true;
}
?>
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