<?php
/**
 * TAccordion class file.
 *
 * @author Gabor Berczi, DevWorx Hungary <gabor.berczi@devworx.hu>
 * @link http://www.pradosoft.com/
 * @copyright Copyright &copy; 2005-2014 PradoSoft
 * @license http://www.pradosoft.com/license/
 * @package Prado\Web\UI\WebControls
 * @since 3.2
 */

namespace Prado\Web\UI\WebControls;

/**
 * Class TAccordionView.
 *
 * TAccordionView represents a single view in a {@link TAccordion}.
 *
 * TAccordionView is represented inside the {@link TAccordion} with an header label whose text is defined by
 * the {@link setCaption Caption} property; optionally the label can be an hyperlink: use the
 * {@link setNavigateUrl NavigateUrl} property to define the destination url.
 *
 * @author Gabor Berczi, DevWorx Hungary <gabor.berczi@devworx.hu>
 * @package Prado\Web\UI\WebControls
 * @since 3.2
 */
class TAccordionView extends TWebControl
{
	private $_active=false;

	/**
	 * @return the tag name for the view element
	 */
	protected function getTagName()
	{
		return 'div';
	}

	/**
	 * Adds attributes to renderer.
	 * @param THtmlWriter the renderer
	 */
	protected function addAttributesToRender($writer)
	{
		if(!$this->getActive() && $this->getPage()->getClientSupportsJavaScript())
			$this->getStyle()->setStyleField('display','none');

		$this->getStyle()->mergeWith($this->getParent()->getViewStyle());

		parent::addAttributesToRender($writer);

		$writer->addAttribute('id',$this->getClientID());
	}

	/**
	 * @return string the caption displayed on this header. Defaults to ''.
	 */
	public function getCaption()
	{
		return $this->getViewState('Caption','');
	}

	/**
	 * @param string the caption displayed on this header
	 */
	public function setCaption($value)
	{
		$this->setViewState('Caption',TPropertyValue::ensureString($value),'');
	}

	/**
	 * @return string the URL of the target page. Defaults to ''.
	 */
	public function getNavigateUrl()
	{
		return $this->getViewState('NavigateUrl','');
	}

	/**
	 * Sets the URL of the target page.
	 * If not empty, clicking on this header will redirect the browser to the specified URL.
	 * @param string the URL of the target page.
	 */
	public function setNavigateUrl($value)
	{
		$this->setViewState('NavigateUrl',TPropertyValue::ensureString($value),'');
	}

	/**
	 * @return string the text content displayed on this view. Defaults to ''.
	 */
	public function getText()
	{
		return $this->getViewState('Text','');
	}

	/**
	 * Sets the text content to be displayed on this view.
	 * If this is not empty, the child content of the view will be ignored.
	 * @param string the text content displayed on this view
	 */
	public function setText($value)
	{
		$this->setViewState('Text',TPropertyValue::ensureString($value),'');
	}

	/**
	 * @return boolean whether this accordion view is active. Defaults to false.
	 */
	public function getActive()
	{
		return $this->_active;
	}

	/**
	 * @param boolean whether this accordion view is active.
	 */
	public function setActive($value)
	{
		$this->_active=TPropertyValue::ensureBoolean($value);
	}

	/**
	 * Renders body contents of the accordion view.
	 * @param THtmlWriter the writer used for the rendering purpose.
	 */
	public function renderContents($writer)
	{
		if(($text=$this->getText())!=='')
			$writer->write($text);
		else if($this->getHasControls())
			parent::renderContents($writer);
	}

	/**
	 * Renders the header associated with the accordion view.
	 * @param THtmlWriter the writer for rendering purpose.
	 */
	public function renderHeader($writer)
	{
		if($this->getVisible(false) && $this->getPage()->getClientSupportsJavaScript())
		{
			$writer->addAttribute('id',$this->getClientID().'_0');

			$style=$this->getActive()?$this->getParent()->getActiveHeaderStyle():$this->getParent()->getHeaderStyle();

			$style->addAttributesToRender($writer);

			$writer->renderBeginTag($this->getTagName());

			$this->renderHeaderContent($writer);

			$writer->renderEndTag();
		}
	}

	/**
	 * Renders the content in the header.
	 * By default, a hyperlink is displayed.
	 * @param THtmlWriter the HTML writer
	 */
	protected function renderHeaderContent($writer)
	{
		$url = $this->getNavigateUrl();
		if(($caption=$this->getCaption())==='')
			$caption='&nbsp;';

		if ($url!='')
			$writer->write("<a href=\"{$url}\">");
		$writer->write("{$caption}");
		if ($url!='')
			$writer->write("</a>");
	}
}