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<?php
/**
* TRequiredFieldValidator class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package Prado\Web\UI\WebControls
*/
namespace Prado\Web\UI\WebControls;
/**
* Using TBaseValidator class
*/
Prado::using('System.Web.UI.WebControls.TBaseValidator');
/**
* TRequiredFieldValidator class
*
* TRequiredFieldValidator makes the associated input control a required field.
* The input control fails validation if its value does not change from
* the {@link setInitialValue InitialValue} property upon losing focus.
*
* Validation will also succeed if input is of TListControl type and the number
* of selected values different from the initial value is greater than zero.
*
* If the input is of TListControl type and has a {@link TListControl::setPromptValue PromptValue}
* set, it will be automatically considered as the validator's {@link setInitialValue InitialValue}.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package Prado\Web\UI\WebControls
* @since 3.0
*/
class TRequiredFieldValidator extends TBaseValidator
{
/**
* Gets the name of the javascript class responsible for performing validation for this control.
* This method overrides the parent implementation.
* @return string the javascript class name
*/
protected function getClientClassName()
{
return 'Prado.WebUI.TRequiredFieldValidator';
}
/**
* @return string the initial value of the associated input control. Defaults to empty string
* unless the control has a prompt value set.
* If the associated input control does not change from this initial value
* upon postback, the validation fails.
*/
public function getInitialValue()
{
return $this->getViewState('InitialValue',$this->getControlPromptValue());
}
/**
* @return string the initial value of the associated input control. Defaults to empty string.
* If the associated input control does not change from this initial value
* upon postback, the validation fails.
*/
protected function getControlPromptValue()
{
$control = $this->getValidationTarget();
if($control instanceof TListControl)
return $control->getPromptValue();
return '';
}
/**
* @param string the initial value of the associated input control.
* If the associated input control does not change from this initial value
* upon postback, the validation fails.
*/
public function setInitialValue($value)
{
$this->setViewState('InitialValue',TPropertyValue::ensureString($value),'');
}
/**
* This method overrides the parent's implementation.
* The validation succeeds if the input component changes its data
* from the {@link getInitialValue InitialValue} or the input control is not given.
*
* Validation will also succeed if input is of TListControl type and the
* number of selected values different from the initial value is greater
* than zero.
*
* @return boolean whether the validation succeeds
*/
protected function evaluateIsValid()
{
$control = $this->getValidationTarget();
if($control instanceof TListControl)
return $this->validateListControl($control);
else if($control instanceof TRadioButton && strlen($control->getGroupName()) > 0)
return $this->validateRadioButtonGroup($control);
else
return $this->validateStandardControl($control);
}
private function validateListControl($control)
{
$initial = trim($this->getInitialValue());
$count = 0;
foreach($control->getItems() as $item)
{
if($item->getSelected() && $item->getValue() != $initial)
$count++;
}
return $count > 0;
}
private function validateRadioButtonGroup($control)
{
$initial = trim($this->getInitialValue());
foreach($control->getRadioButtonsInGroup() as $radio)
{
if($radio->getChecked())
{
if(strlen($value = $radio->getValue()) > 0)
return $value !== $initial;
else
return true;
}
}
return false;
}
private function validateStandardControl($control)
{
$initial = trim($this->getInitialValue());
$value=$this->getValidationValue($control);
return (is_bool($value) && $value) || trim($value)!==$initial;
}
/**
* Returns an array of javascript validator options.
* @return array javascript validator options.
*/
protected function getClientScriptOptions()
{
$options = parent::getClientScriptOptions();
$options['InitialValue']=$this->getInitialValue();
$control = $this->getValidationTarget();
if($control instanceof TListControl)
$options['TotalItems'] = $control->getItemCount();
if($control instanceof TRadioButton && strlen($control->getGroupName()) > 0)
$options['GroupName'] = $control->getGroupName();
return $options;
}
}
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