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<?php
/**
* TListControlValidator class file
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2008 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Id$
* @package System.Web.UI.WebControls
*/
/**
* Using TBaseValidator class
*/
Prado::using('System.Web.UI.WebControls.TBaseValidator');
/**
* TListControlValidator class.
*
* TListControlValidator checks the number of selection and their values
* for a <b>TListControl that allows multiple selection</b>.
*
* You can specify the minimum or maximum (or both) number of selections
* required using the {@link setMinSelection MinSelection} and
* {@link setMaxSelection MaxSelection} properties, respectively. In addition,
* you can specify a comma separated list of required selected values via the
* {@link setRequiredSelections RequiredSelections} property.
*
* Examples
* - At least two selections
* <code>
* <com:TListBox ID="listbox" SelectionMode="Multiple">
* <com:TListItem Text="item1" Value="value1" />
* <com:TListItem Text="item2" Value="value2" />
* <com:TListItem Text="item3" Value="value3" />
* </com:TListBox>
*
* <com:TListControlValidator
* ControlToValidate="listbox"
* MinSelection="2"
* ErrorMessage="Please select at least 2" />
* </code>
* - "value1" must be selected <b>and</b> at least 1 other
* <code>
* <com:TCheckBoxList ID="checkboxes">
* <com:TListItem Text="item1" Value="value1" />
* <com:TListItem Text="item2" Value="value2" />
* <com:TListItem Text="item3" Value="value3" />
* </com:TCheckBoxList>
*
* <com:TListControlValidator
* ControlToValidate="checkboxes"
* RequiredSelections="value1"
* MinSelection="2"
* ErrorMessage="Please select 'item1' and at least 1 other" />
* </code>
*
* @author Xiang Wei Zhuo <weizhuo[at]gmail.com>
* @version $Id$
* @package System.Web.UI.WebControls
* @since 3.0
*/
class TListControlValidator 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.TListControlValidator';
}
/**
* @return integer min number of selections. Defaults to -1, meaning not set.
*/
public function getMinSelection()
{
return $this->getViewState('MinSelection',-1);
}
/**
* @param integer minimum number of selections.
*/
public function setMinSelection($value)
{
if(($value=TPropertyValue::ensureInteger($value))<0)
$value=-1;
$this->setViewState('MinSelection',$value,-1);
}
/**
* @return integer max number of selections. Defaults to -1, meaning not set.
*/
public function getMaxSelection()
{
return $this->getViewState('MaxSelection',-1);
}
/**
* @param integer max number of selections.
*/
public function setMaxSelection($value)
{
if(($value=TPropertyValue::ensureInteger($value))<0)
$value=-1;
$this->setViewState('MaxSelection',$value,-1);
}
/**
* Get a comma separated list of required selected values.
* @return string comma separated list of required values.
*/
public function getRequiredSelections()
{
return $this->getViewState('RequiredSelections','');
}
/**
* Set the list of required values, using aa comma separated list.
* @param string comma separated list of required values.
*/
public function setRequiredSelections($value)
{
$this->setViewState('RequiredSelections',$value,'');
}
/**
* This method overrides the parent's implementation.
* The validation succeeds if the input component changes its data
* from the InitialValue or the input component is not given.
* @return boolean whether the validation succeeds
*/
protected function evaluateIsValid()
{
$control=$this->getValidationTarget();
$exists = true;
$values = $this->getSelection($control);
$count = count($values);
$required = $this->getRequiredValues();
//if required, check the values
if(!empty($required))
{
if($count < count($required) )
return false;
foreach($required as $require)
$exists = $exists && in_array($require, $values);
}
$min = $this->getMinSelection();
$max = $this->getMaxSelection();
if($min !== -1 && $max !== -1)
return $exists && $count >= $min && $count <= $max;
else if($min === -1 && $max !== -1)
return $exists && $count <= $max;
else if($min !== -1 && $max === -1)
return $exists && $count >= $min;
else
return $exists;
}
/**
* @param TListControl control to validate
* @return array number of selected values and its values.
*/
protected function getSelection($control)
{
$values = array();
//get the data
foreach($control->getItems() as $item)
{
if($item->getSelected())
$values[] = $item->getValue();
}
return $values;
}
/**
* @return array list of required values.
*/
protected function getRequiredValues()
{
$required = array();
$string = $this->getRequiredSelections();
if(!empty($string))
$required = preg_split('/,\s*/', $string);
return $required;
}
/**
* Returns an array of javascript validator options.
* @return array javascript validator options.
*/
protected function getClientScriptOptions()
{
$options = parent::getClientScriptOptions();
$control = $this->getValidationTarget();
if(!$control instanceof TListControl)
{
throw new TConfigurationException(
'listcontrolvalidator_invalid_control',
$this->getID(),$this->getControlToValidate(), get_class($control));
}
$min = $this->getMinSelection();
$max = $this->getMaxSelection();
if($min !== -1)
$options['Min']= $min;
if($max !== -1)
$options['Max']= $max;
$required = $this->getRequiredSelections();
if(strlen($required) > 0)
$options['Required']= $required;
$options['TotalItems'] = $control->getItemCount();
return $options;
}
}
?>
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