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<?php
/**
* TActiveRepeater class file
*
* @author LANDWEHR Computer und Software GmbH <programmierung@landwehr-software.de>
* @package Prado\Web\UI\ActiveControls
* @since 3.1.9
*/
namespace Prado\Web\UI\ActiveControls;
use Prado\Web\UI\ISurroundable;
use Prado\Web\UI\WebControls\TRepeater;
/**
* TActiveRepeater class
*
* TActiveRepeater represents a data bound and updatable grid control which is the
* active counterpart to the original {@link TRepeater} control.
*
* This component can be used in the same way as the regular datagrid, the only
* difference is that the active repeater uses callbacks instead of postbacks
* for interaction.
*
* Please refer to the original documentation of the regular counterparts for usage.
*
* @author LANDWEHR Computer und Software GmbH <programmierung@landwehr-software.de>
* @package Prado\Web\UI\ActiveControls
* @since 3.1.9
*/
class TActiveRepeater extends TRepeater implements IActiveControl, ISurroundable {
/**
* Creates a new callback control, sets the adapter to
* TActiveControlAdapter.
*/
public function __construct() {
parent::__construct();
$this->setAdapter(new TActiveControlAdapter($this));
}
/**
* @return TBaseActiveControl standard active control options.
*/
public function getActiveControl() {
return $this->getAdapter()->getBaseActiveControl();
}
/**
* Sets the data source object associated with the repeater control.
* In addition, the render method of all connected pagers is called so they
* get updated when the data source is changed. Also the repeater registers
* itself for rendering in order to get it's content replaced on client side.
* @param Traversable|array|string data source object
*/
public function setDataSource($value) {
parent::setDataSource($value);
if($this->getActiveControl()->canUpdateClientSide()) {
$this->renderPager();
$this->getPage()->getAdapter()->registerControlToRender($this,$this->getResponse()->createHtmlWriter());
}
}
/**
* Returns the id of the surrounding container (span).
* @return string container id
*/
public function getSurroundingTagID() {
return $this->ClientID.'_Container';
}
/**
* Renders the repeater.
* If the repeater did not pass the prerender phase yet, it will register itself for rendering later.
* Else it will call the {@link renderRepeater()} method which will do the rendering of the repeater.
* @param THtmlWriter writer for the rendering purpose
*/
public function render($writer) {
if($this->getHasPreRendered()) {
$this->renderRepeater($writer);
if($this->getActiveControl()->canUpdateClientSide()) $this->getPage()->getCallbackClient()->replaceContent($this->getSurroundingTagId(),$writer);
}
else {
$this->getPage()->getAdapter()->registerControlToRender($this,$writer);
}
}
/**
* Loops through all {@link TActivePager} on the page and registers the ones which are set to paginate
* the repeater for rendering. This is to ensure that the connected pagers are also rendered if the
* data source changed.
*/
private function renderPager() {
$pager=$this->getPage()->findControlsByType('TActivePager', false);
foreach($pager as $item) {
if($item->ControlToPaginate==$this->ID) {
$writer=$this->getResponse()->createHtmlWriter();
$this->getPage()->getAdapter()->registerControlToRender($item,$writer);
}
}
}
/**
* Renders the repeater by writing a span tag with the container id obtained from {@link getSurroundingTagID()}
* which will be called by the replacement method of the client script to update it's content.
* @param THtmlWriter writer for the rendering purpose
*/
private function renderRepeater($writer) {
$writer->addAttribute('id',$this->getSurroundingTagID());
$writer->renderBeginTag('span');
parent::render($writer);
$writer->renderEndTag();
}
}
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