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<?php
/**
* TActiveListControlAdapter class file.
*
* @author Wei Zhuo <weizhuo[at]gamil[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package System.Web.UI.ActiveControls
*/
/**
* Load active control adapter.
*/
Prado::using('System.Web.UI.ActiveControls.TActiveControlAdapter');
Prado::using('System.Web.UI.WebControls.TListControl');
/**
* TActiveListControlAdapter class.
*
* Adapte the list controls to allows the selections on the client-side to be altered
* during callback response.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @package System.Web.UI.ActiveControls
* @since 3.1
*/
class TActiveListControlAdapter extends TActiveControlAdapter implements IListControlAdapter
{
/**
* @return boolean true if can update client-side attributes.
*/
protected function canUpdateClientSide()
{
return $this->getControl()->getActiveControl()->canUpdateClientSide();
}
/**
* Selects an item based on zero-base index on the client side.
* @param integer the index (zero-based) of the item to be selected
*/
public function setSelectedIndex($index)
{
if($this->canUpdateClientSide())
{
$this->updateListItems();
// if a prompt is set, we mimic the postback behaviour of not counting it
// in the index. We assume the prompt is _always_ the first item (Issue #368)
$promptValue=$this->getControl()->getPromptValue();
if($promptValue==='')
$promptValue=$this->getControl()->getPromptText();
if($promptValue!=='')
$index++;
if($index >= 0 && $index <= $this->getControl()->getItemCount())
$this->getPage()->getCallbackClient()->select(
$this->getControl(), 'Index', $index);
}
}
/**
* Selects a list of item based on zero-base indices on the client side.
* @param array list of index of items to be selected
*/
public function setSelectedIndices($indices)
{
if($this->canUpdateClientSide())
{
$this->updateListItems();
$n = $this->getControl()->getItemCount();
$promptValue=$this->getControl()->getPromptValue();
if($promptValue==='')
$promptValue=$this->getControl()->getPromptText();
$list = array();
foreach($indices as $index)
{
$index = intval($index);
if($promptValue!=='')
$index++;
if($index >= 0 && $index <= $n)
$list[] = $index;
}
if(count($list) > 0)
$this->getPage()->getCallbackClient()->select(
$this->getControl(), 'Indices', $list);
}
}
/**
* Sets selection by item value on the client side.
* @param string the value of the item to be selected.
*/
public function setSelectedValue($value)
{
if($this->canUpdateClientSide())
{
$this->updateListItems();
$this->getPage()->getCallbackClient()->select(
$this->getControl(), 'Value', $value);
}
}
/**
* Sets selection by a list of item values on the client side.
* @param array list of the selected item values
*/
public function setSelectedValues($values)
{
if($this->canUpdateClientSide())
{
$this->updateListItems();
$list = array();
foreach($values as $value)
$list[] = $value;
if(count($list) > 0)
$this->getPage()->getCallbackClient()->select(
$this->getControl(), 'Values', $list);
}
}
/**
* Clears all existing selections on the client side.
*/
public function clearSelection()
{
if($this->canUpdateClientSide())
{
$this->updateListItems();
if($this->getControl() instanceof TActiveDropDownList)
{
// clearing a TActiveDropDownList's selection actually doesn't select the first item;
// we mimic the postback behaviour selecting it (Issue #368)
$this->getPage()->getCallbackClient()->select($this->getControl(), 'Index', 0);
} else {
$this->getPage()->getCallbackClient()->select($this->getControl(), 'Clear');
}
}
}
/**
* Update the client-side list options.
*/
public function updateListItems()
{
if($this->canUpdateClientSide())
{
$items = $this->getControl()->getItems();
if($items instanceof TActiveListItemCollection
&& $items->getListHasChanged())
{
$items->updateClientSide();
}
}
}
}
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