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<?php
/**
* THyperLink class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.xisc.com/
* @copyright Copyright © 2005-2008 PradoSoft
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version $Id$
* @package System.Web.UI.WebControls
*/
/**
* THyperLink class
*
* THyperLink displays a hyperlink on a page. The hyperlink URL is specified
* via the {@link setNavigateUrl NavigateUrl} property, and link text is via
* the {@link setText Text} property. It is also possible to display an image
* by setting the {@link setImageUrl ImageUrl} property. In this case,
* {@link getText Text} is displayed as the alternate text of the image.
* The link target is specified via the {@link setTarget Target} property.
* If both {@link getImageUrl ImageUrl} and {@link getText Text} are empty,
* the content enclosed within the control tag will be rendered.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package System.Web.UI.WebControls
* @since 3.0
*/
class THyperLink extends TWebControl implements IDataRenderer
{
/**
* @return string tag name of the hyperlink
*/
protected function getTagName()
{
return 'a';
}
/**
* Adds attributes related to a hyperlink element to renderer.
* @param THtmlWriter the writer used for the rendering purpose
*/
protected function addAttributesToRender($writer)
{
$isEnabled=$this->getEnabled(true);
if($this->getEnabled() && !$isEnabled)
$writer->addAttribute('disabled','disabled');
parent::addAttributesToRender($writer);
if(($url=$this->getNavigateUrl())!=='' && $isEnabled)
$writer->addAttribute('href',$url);
if(($target=$this->getTarget())!=='')
$writer->addAttribute('target',$target);
}
/**
* Renders the body content of the hyperlink.
* @param THtmlWriter the writer for rendering
*/
public function renderContents($writer)
{
if(($imageUrl=$this->getImageUrl())==='')
{
if(($text=$this->getText())!=='')
$writer->write(THttpUtility::htmlEncode($text));
else if($this->getHasControls())
parent::renderContents($writer);
else
$writer->write(THttpUtility::htmlEncode($this->getNavigateUrl()));
}
else
{
$this->createImage($imageUrl)->renderControl($writer);
}
}
/**
* Gets the TImage for rendering the ImageUrl property. This is not for
* creating dynamic images.
* @param string image url.
* @return TImage image control for rendering.
*/
protected function createImage($imageUrl)
{
$image=Prado::createComponent('System.Web.UI.WebControls.TImage');
$image->setImageUrl($imageUrl);
if(($toolTip=$this->getToolTip())!=='')
$image->setToolTip($toolTip);
if(($text=$this->getText())!=='')
$image->setAlternateText($text);
$image->setBorderWidth('0');
return $image;
}
/**
* @return string the text caption of the THyperLink
*/
public function getText()
{
return $this->getViewState('Text','');
}
/**
* Sets the text caption of the THyperLink.
* @param string the text caption to be set
*/
public function setText($value)
{
$this->setViewState('Text',$value,'');
}
/**
* @return string the location of the image file for the THyperLink
*/
public function getImageUrl()
{
return $this->getViewState('ImageUrl','');
}
/**
* Sets the location of image file of the THyperLink.
* @param string the image file location
*/
public function setImageUrl($value)
{
$this->setViewState('ImageUrl',$value,'');
}
/**
* @return string the URL to link to when the THyperLink component is clicked.
*/
public function getNavigateUrl()
{
return $this->getViewState('NavigateUrl','');
}
/**
* Sets the URL to link to when the THyperLink component is clicked.
* @param string the URL
*/
public function setNavigateUrl($value)
{
$this->setViewState('NavigateUrl',$value,'');
}
/**
* Returns the URL to link to when the THyperLink component is clicked.
* This method is required by {@link IDataRenderer}.
* It is the same as {@link getText()}.
* @return string the text caption
* @see getText
* @since 3.1.0
*/
public function getData()
{
return $this->getText();
}
/**
* Sets the URL to link to when the THyperLink component is clicked.
* This method is required by {@link IDataRenderer}.
* It is the same as {@link setText()}.
* @param string the text caption to be set
* @see setText
* @since 3.1.0
*/
public function setData($value)
{
$this->setText($value);
}
/**
* @return string the target window or frame to display the Web page content linked to when the THyperLink component is clicked.
*/
public function getTarget()
{
return $this->getViewState('Target','');
}
/**
* Sets the target window or frame to display the Web page content linked to when the THyperLink component is clicked.
* @param string the target window, valid values include '_blank', '_parent', '_self', '_top' and empty string.
*/
public function setTarget($value)
{
$this->setViewState('Target',$value,'');
}
}
?>
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