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<?php
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/**
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* TRequiredFieldValidator class file
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.pradosoft.com/
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* @copyright Copyright © 2005-2008 PradoSoft
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* @license http://www.pradosoft.com/license/
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* @version $Id: TRequiredFieldValidator.php 2541 2008-10-21 15:05:13Z qiang.xue $
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* @package System.Web.UI.WebControls
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*/
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/**
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* Using TBaseValidator class
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*/
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Prado::using('System.Web.UI.WebControls.TBaseValidator');
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/**
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* TRequiredFieldValidator class
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*
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* TRequiredFieldValidator makes the associated input control a required field.
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* The input control fails validation if its value does not change from
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* the {@link setInitialValue InitialValue} property upon losing focus.
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*
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* Validation will also succeed if input is of TListControl type and the number
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* of selected values different from the initial value is greater than zero.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @version $Id: TRequiredFieldValidator.php 2541 2008-10-21 15:05:13Z qiang.xue $
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* @package System.Web.UI.WebControls
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* @since 3.0
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*/
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class TRequiredFieldValidator extends TBaseValidator
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{
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/**
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* Gets the name of the javascript class responsible for performing validation for this control.
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* This method overrides the parent implementation.
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* @return string the javascript class name
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*/
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protected function getClientClassName()
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{
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return 'Prado.WebUI.TRequiredFieldValidator';
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}
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/**
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* @return string the initial value of the associated input control. Defaults to empty string.
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* If the associated input control does not change from this initial value
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* upon postback, the validation fails.
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*/
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public function getInitialValue()
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{
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return $this->getViewState('InitialValue','');
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}
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/**
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* @param string the initial value of the associated input control.
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* If the associated input control does not change from this initial value
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* upon postback, the validation fails.
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*/
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public function setInitialValue($value)
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{
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$this->setViewState('InitialValue',TPropertyValue::ensureString($value),'');
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}
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/**
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* This method overrides the parent's implementation.
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* The validation succeeds if the input component changes its data
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* from the {@link getInitialValue InitialValue} or the input control is not given.
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*
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* Validation will also succeed if input is of TListControl type and the
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* number of selected values different from the initial value is greater
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* than zero.
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*
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* @return boolean whether the validation succeeds
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*/
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protected function evaluateIsValid()
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{
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$control = $this->getValidationTarget();
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if($control instanceof TListControl)
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return $this->validateListControl($control);
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else if($control instanceof TRadioButton && strlen($control->getGroupName()) > 0)
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return $this->validateRadioButtonGroup($control);
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else
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return $this->validateStandardControl($control);
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}
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private function validateListControl($control)
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{
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$initial = trim($this->getInitialValue());
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$count = 0;
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foreach($control->getItems() as $item)
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{
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if($item->getSelected() && $item->getValue() != $initial)
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$count++;
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}
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return $count > 0;
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}
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private function validateRadioButtonGroup($control)
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{
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$initial = trim($this->getInitialValue());
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foreach($control->getRadioButtonsInGroup() as $radio)
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{
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if($radio->getChecked())
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{
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if(strlen($value = $radio->getValue()) > 0)
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return $value !== $initial;
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else
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return true;
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}
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}
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return false;
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}
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private function validateStandardControl($control)
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{
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$initial = trim($this->getInitialValue());
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$value=$this->getValidationValue($control);
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return (is_bool($value) && $value) || trim($value)!==$initial;
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}
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/**
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* Returns an array of javascript validator options.
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* @return array javascript validator options.
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*/
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protected function getClientScriptOptions()
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{
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$options = parent::getClientScriptOptions();
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$options['InitialValue']=$this->getInitialValue();
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$control = $this->getValidationTarget();
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if($control instanceof TListControl)
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$options['TotalItems'] = $control->getItemCount();
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if($control instanceof TRadioButton && strlen($control->getGroupName()) > 0)
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$options['GroupName'] = $control->getGroupName();
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return $options;
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}
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}
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