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<?php
/**
* TActivePager class file.
*
* @author "gevik" (forum contributor) and Christophe Boulain (Christophe.Boulain@gmail.com)
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package Prado\Web\UI\ActiveControls
*/
namespace Prado\Web\UI\ActiveControls;
/**
* Load active control adapter.
*/
use Prado\Prado;
use Prado\Web\UI\WebControls\TDisplayStyle;
use Prado\Web\UI\WebControls\TLabel;
use Prado\Web\UI\WebControls\TPager;
use Prado\Web\UI\WebControls\TPagerButtonType;
use Prado\Web\UI\WebControls\TPagerMode;
use Prado\Web\UI\WebControls\TWebControl;
/**
* TActivePager is the active control counter part of TPager.
*
* When a page change is requested, TActivePager raises a callback instead of the
* traditional postback.
*
* The {@link onCallback OnCallback} event is raised during a callback request
* and it is raise <b>after</b> the {@link onPageIndexChanged OnPageIndexChanged} event.
*
* @author "gevik" (forum contributor) and Christophe Boulain (Christophe.Boulain@gmail.com)
* @package Prado\Web\UI\ActiveControls
* @since 3.1.2
*/
class TActivePager extends TPager implements IActiveControl, ICallbackEventHandler
{
/**
* Creates a new callback control, sets the adapter to
* TActiveControlAdapter. If you override this class, be sure to set the
* adapter appropriately by, for example, by calling this constructor.
*/
public function __construct()
{
parent::__construct();
$this->setAdapter(new TActiveControlAdapter($this));
}
/**
* @return TBaseActiveControl standard active control options.
*/
public function getActiveControl()
{
return $this->getAdapter()->getBaseActiveControl();
}
/**
* @return TCallbackClientSide client side request options.
*/
public function getClientSide()
{
return $this->getAdapter()->getBaseActiveControl()->getClientSide();
}
/**
* Raises the callback event. This method is required by {@link
* ICallbackEventHandler} interface.
* This method is mainly used by framework and control developers.
* @param TCallbackEventParameter the event parameter
*/
public function raiseCallbackEvent($param)
{
$this->onCallback($param);
}
/**
* This method is invoked when a callback is requested. The method raises
* 'OnCallback' event to fire up the event handlers. If you override this
* method, be sure to call the parent implementation so that the event
* handler can be invoked.
* @param TCallbackEventParameter event parameter to be passed to the event handlers
*/
public function onCallback($param)
{
$this->raiseEvent('OnCallback', $this, $param);
}
/**
* Builds a dropdown list pager
* Override parent implementation to build Active dropdown lists.
*/
protected function buildListPager()
{
$list=new TActiveDropDownList;
$list->getAdapter()->getBaseActiveControl()->setClientSide(
$this->getClientSide()
);
$this->getControls()->add($list);
$list->setDataSource(range(1,$this->getPageCount()));
$list->dataBind();
$list->setSelectedIndex($this->getCurrentPageIndex());
$list->setAutoPostBack(true);
$list->attachEventHandler('OnSelectedIndexChanged',array($this,'listIndexChanged'));
$list->attachEventHandler('OnCallback', array($this, 'handleCallback'));
}
/**
* Creates a pager button.
* Override parent implementation to create, depending on the button type, a TActiveLinkButton,
* a TActiveButton or a TActiveImageButton may be created.
*
* @param string button type, either LinkButton or PushButton
* @param boolean whether the button should be enabled
* @param string caption of the button
* @param string CommandName corresponding to the OnCommand event of the button
* @param string CommandParameter corresponding to the OnCommand event of the button
* @return mixed the button instance
*/
protected function createPagerButton($buttonType,$enabled,$text,$commandName,$commandParameter)
{
if($buttonType===TPagerButtonType::LinkButton)
{
if($enabled)
$button=new TActiveLinkButton;
else
{
$button=new TLabel;
$button->setText($text);
$button->setCssClass($this->getButtonCssClass());
return $button;
}
}
else if($buttonType===TPagerButtonType::ImageButton)
{
$button = new TActiveImageButton;
$button->setImageUrl($this->getPageImageUrl($text,$commandName));
if($enabled)
$button->Visible = true;
else
$button->Visible = false;
}
else
{
$button=new TActiveButton;
if(!$enabled)
$button->setEnabled(false);
}
if($buttonType===TPagerButtonType::ImageButton)
{
$button->ImageUrl = $text;
}
$button->setText($text);
$button->setCommandName($commandName);
$button->setCommandParameter($commandParameter);
$button->setCausesValidation(false);
$button->setCssClass($this->getButtonCssClass());
$button->attachEventHandler('OnCallback', array($this, 'handleCallback'));
$button->getAdapter()->getBaseActiveControl()->setClientSide(
$this->getClientSide()
);
return $button;
}
/**
* Event handler to the OnCallback active buttons or active dropdownlist.
* This handler will raise the {@link onCallback OnCallback} event
*
* @param mixed $sender
* @param TCallbackEventParameter $param
*/
public function handleCallback ($sender,$param)
{
// Update all the buttons pagers attached to the same control.
// Dropdown pagers doesn't need to be re-rendered.
$controlToPaginate=$this->getControlToPaginate();
foreach ($this->getNamingContainer()->findControlsByType('TActivePager', false) as $control)
{
if ($control->getMode() !== TPagerMode::DropDownList && $control->getControlToPaginate()===$controlToPaginate)
{
$control->render($param->getNewWriter());
// FIXME : With some very fast machine, the getNewWriter() consecutive calls are in the same microsecond, resulting
// of getting the same boundaries in ajax response. Wait 1 microsecond to avoid this.
usleep(1);
}
}
// Raise callback event
$this->onCallback($param);
}
public function render ($writer)
{
if($this->getHasPreRendered())
{
$this->setDisplay(($this->getPageCount()==1)?TDisplayStyle::None:TDisplayStyle::Dynamic);
TWebControl::render($writer);
if($this->getActiveControl()->canUpdateClientSide())
$this->getPage()->getCallbackClient()->replaceContent($this,$writer);
}
else
{
$this->getPage()->getAdapter()->registerControlToRender($this,$writer);
}
}
}
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