Subversion-Projekte lars-tiefland.prado

<?php
/**
 * TRequiredFieldValidator class file
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.pradosoft.com/
 * @copyright Copyright &copy; 2005-2008 PradoSoft
 * @license http://www.pradosoft.com/license/
 * @version $Id: TRequiredFieldValidator.php 2541 2008-10-21 15:05:13Z qiang.xue $
 * @package System.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.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id: TRequiredFieldValidator.php 2541 2008-10-21 15:05:13Z qiang.xue $
 * @package System.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.
         * If the associated input control does not change from this initial value
         * upon postback, the validation fails.
         */
        public function getInitialValue()
        {
                return $this->getViewState('InitialValue','');
        }

        /**
         * @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;
        }
}