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<?php
class TListBox extends TListControl implements IPostBackDataHandler
{
protected function addAttributesToRender($writer)
{
$rows=$this->getRows();
$writer->addAttribute('size',"$rows");
if($this->getSelectionMode()==='Multiple')
$writer->addAttribute('name',$this->getUniqueID().'[]');
else
$writer->addAttribute('name',$this->getUniqueID());
parent::addAttributesToRender($writer);
}
protected function onPreRender($param)
{
parent::onPreRender($param);
if($this->getEnabled(true))
$this->getPage()->registerRequiresPostData($this);
}
public function loadPostData($key,$values)
{
if(!$this->getEnabled(true))
return false;
$this->ensureDataBound();
$selections=isset($values[$key])?$values[$key]:null;
if($selections!==null)
{
$items=$this->getItems();
if($this->getSelectionMode()==='Single')
{
$selection=is_array($selections)?$selections[0]:$selections;
$index=$items->findIndexByValue($selection,false);
if($this->getSelectedIndex()!==$index)
{
$this->setSelectedIndex($index);
return true;
}
else
return false;
}
if(!is_array($selections))
$selections=array($selections);
$list=array();
foreach($selections as $selection)
$list[]=$items->findIndexByValue($selection,false);
$list2=$this->getSelectedIndices();
$n=count($list);
$flag=false;
if($n===count($list2))
{
sort($list,SORT_NUMERIC);
for($i=0;$i<$n;++$i)
{
if($list[$i]!==$list2[$i])
{
$flag=true;
break;
}
}
}
else
$flag=true;
if($flag)
$this->setSelectedIndices($list);
return $flag;
}
else if($this->getSelectedIndex()!==-1)
{
$this->clearSelection();
return true;
}
else
return false;
}
public function raisePostDataChangedEvent()
{
$page=$this->getPage();
if($this->getAutoPostBack() && !$page->getPostBackEventTarget())
{
$page->setPostBackEventTarget($this);
if($this->getCausesValidation())
$page->validate($this->getValidationGroup());
}
$this->onSelectedIndexChanged(null);
}
protected function getIsMultiSelect()
{
return $this->getSelectionMode()==='Multiple';
}
public function getSelectedIndices()
{
return parent::getSelectedIndices();
}
/**
* @return integer the number of rows to be displayed in the component
*/
public function getRows()
{
return $this->getViewState('Rows', 4);
}
/**
* Sets the number of rows to be displayed in the component
* @param integer the number of rows
*/
public function setRows($value)
{
$value=TPropertyValue::ensureInteger($value);
if($value<=0)
$value=4;
$this->setViewState('Rows', $value, 4);
}
/**
* @return string the selection mode (Single, Multiple )
*/
public function getSelectionMode()
{
return $this->getViewState('SelectionMode', 'Single');
}
/**
* Sets the selection mode of the component (Single, Multiple)
* @param string the selection mode
*/
public function setSelectionMode($value)
{
$this->setViewState('SelectionMode',TPropertyValue::ensureEnum($value,array('Single','Multiple')),'Single');
}
}
?>
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