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<?php
/**
* TDataListItemRenderer class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2011 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Id$
* @package System.Web.UI.WebControls
*/
Prado::using('System.Web.UI.WebControls.TDataList');
Prado::using('System.Web.UI.WebControls.TItemDataRenderer');
/**
* TDataListItemRenderer class
*
* TDataListItemRenderer can be used as a convenient base class to
* define an item renderer class specific for {@link TDataList}.
*
* TDataListItemRenderer extends {@link TItemDataRenderer} and implements
* the bubbling scheme for the OnCommand event of data list items.
*
* TDataListItemRenderer also implements the {@link IStyleable} interface,
* which allows TDataList to apply CSS styles to the renders.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package System.Web.UI.WebControls
* @since 3.1.0
*/
class TDataListItemRenderer extends TItemDataRenderer implements IStyleable
{
/**
* Creates a style object to be used by the control.
* This method may be overriden by controls to provide customized style.
* @return TStyle
*/
protected function createStyle()
{
return new TTableItemStyle;
}
/**
* @return boolean whether the control has defined any style information
*/
public function getHasStyle()
{
return $this->getViewState('Style',null)!==null;
}
/**
* @return TStyle the object representing the css style of the control
*/
public function getStyle()
{
if($style=$this->getViewState('Style',null))
return $style;
else
{
$style=$this->createStyle();
$this->setViewState('Style',$style,null);
return $style;
}
}
/**
* Removes all style data.
*/
public function clearStyle()
{
$this->clearViewState('Style');
}
/**
* This method overrides parent's implementation by wrapping event parameter
* for <b>OnCommand</b> event with item information.
* @param TControl the sender of the event
* @param TEventParameter event parameter
* @return boolean whether the event bubbling should stop here.
*/
public function bubbleEvent($sender,$param)
{
if($param instanceof TCommandEventParameter)
{
$this->raiseBubbleEvent($this,new TDataListCommandEventParameter($this,$sender,$param));
return true;
}
else
return false;
}
/**
* Returns the tag name used for this control.
* By default, the tag name is 'span'.
* You can override this method to provide customized tag names.
* If the tag name is empty, the opening and closing tag will NOT be rendered.
* @return string tag name of the control to be rendered
*/
protected function getTagName()
{
return 'span';
}
/**
* Adds attribute name-value pairs to renderer.
* By default, this method renders the style string.
* The method can be overriden to provide customized attribute rendering.
* @param THtmlWriter the writer used for the rendering purpose
*/
protected function addAttributesToRender($writer)
{
if($style=$this->getViewState('Style',null))
$style->addAttributesToRender($writer);
}
/**
* Renders the control.
* This method overrides the parent implementation by replacing it with
* the following sequence:
* - {@link renderBeginTag}
* - {@link renderContents}
* - {@link renderEndTag}
* If the {@link getTagName TagName} is empty, only {@link renderContents} is invoked.
* @param THtmlWriter the writer used for the rendering purpose
*/
public function render($writer)
{
if($this->getTagName()!=='')
{
$this->renderBeginTag($writer);
$this->renderContents($writer);
$this->renderEndTag($writer);
}
else
$this->renderContents($writer);
}
/**
* Renders the openning tag for the control (including attributes)
* This method is invoked when {@link getTagName TagName} is not empty.
* @param THtmlWriter the writer used for the rendering purpose
*/
public function renderBeginTag($writer)
{
$this->addAttributesToRender($writer);
$writer->renderBeginTag($this->getTagName());
}
/**
* Renders the body content enclosed between the control tag.
* By default, child controls and text strings will be rendered.
* You can override this method to provide customized content rendering.
* @param THtmlWriter the writer used for the rendering purpose
*/
public function renderContents($writer)
{
parent::renderChildren($writer);
}
/**
* Renders the closing tag for the control
* This method is invoked when {@link getTagName TagName} is not empty.
* @param THtmlWriter the writer used for the rendering purpose
*/
public function renderEndTag($writer)
{
$writer->renderEndTag();
}
}
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