* Prado 3.3.0

1 files changed, 810 insertions, 0 deletions

diff --git a/lib/prado/framework/Web/UI/WebControls/TPager.php b/lib/prado/framework/Web/UI/WebControls/TPager.php
new file mode 100644
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+++ b/lib/prado/framework/Web/UI/WebControls/TPager.php
@@ -0,0 +1,810 @@
+<?php
+/**
+ * TPager class file.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link https://github.com/pradosoft/prado
+ * @copyright Copyright &copy; 2005-2015 The PRADO Group
+ * @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
+ * @package System.Web.UI.WebControls
+ */
+
+/**
+ * TPager class.
+ *
+ * TPager creates a pager that provides UI for end-users to interactively
+ * specify which page of data to be rendered in a {@link TDataBoundControl}-derived control,
+ * such as {@link TDataList}, {@link TRepeater}, {@link TCheckBoxList}, etc.
+ * The target data-bound control is specified by {@link setControlToPaginate ControlToPaginate},
+ * which must be the ID path of the target control reaching from the pager's
+ * naming container. Note, the target control must have its {@link TDataBoundControl::setAllowPaging AllowPaging}
+ * set to true.
+ *
+ * TPager can display three different UIs, specified via {@link setMode Mode}:
+ * - NextPrev: a next page and a previous page button are rendered.
+ * - Numeric: a list of page index buttons are rendered.
+ * - List: a dropdown list of page indices are rendered.
+ *
+ * When the pager mode is either NextPrev or Numeric, the paging buttons may be displayed
+ * in three types by setting {@link setButtonType ButtonType}:
+ * - LinkButton: a hyperlink button
+ * - PushButton: a normal button
+ * - ImageButton: an image button (please set XXXPageImageUrl properties accordingly to specify the button images.)
+ *
+ * Since Prado 3.2.1, you can use the {@link setButtonCssClass ButtonCssClass} property to specify a css class
+ * that will be applied to each button created by the pager in NextPrev or Numeric mode.
+ *
+ * TPager raises an {@link onPageIndexChanged OnPageIndexChanged} event when
+ * the end-user interacts with it and specifies a new page (e.g. clicking
+ * on a page button that leads to a new page.) The new page index may be obtained
+ * from the event parameter's property {@link TPagerPageChangedEventParameter::getNewPageIndex NewPageIndex}.
+ * Normally, in the event handler, one can set the {@link TDataBoundControl::getCurrentPageIndex CurrentPageIndex}
+ * to this new page index so that the new page of data is rendered.
+ *
+ * Multiple pagers can be associated with the same data-bound control.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Web.UI.WebControls
+ * @since 3.0.2
+ */
+class TPager extends TWebControl implements INamingContainer
+{
+	/**
+	 * Command name that TPager understands.
+	 */
+	const CMD_PAGE='Page';
+	const CMD_PAGE_NEXT='Next';
+	const CMD_PAGE_PREV='Previous';
+	const CMD_PAGE_FIRST='First';
+	const CMD_PAGE_LAST='Last';
+
+	private $_pageCount=0;
+
+	/**
+	 * Restores the pager state.
+	 * This method overrides the parent implementation and is invoked when
+	 * the control is loading persistent state.
+	 */
+	public function loadState()
+	{
+		parent::loadState();
+		if($this->getEnableViewState(true))
+		{
+			$this->getControls()->clear();
+			$this->buildPager();
+		}
+	}
+
+	/**
+	 * @return string the ID path of the control whose content would be paginated.
+	 */
+	public function getControlToPaginate()
+	{
+		return $this->getViewState('ControlToPaginate','');
+	}
+
+	/**
+	 * Sets the ID path of the control whose content would be paginated.
+	 * The ID path is the dot-connected IDs of the controls reaching from
+	 * the pager's naming container to the target control.
+	 * @param string the ID path
+	 */
+	public function setControlToPaginate($value)
+	{
+		$this->setViewState('ControlToPaginate',$value,'');
+	}
+
+	/**
+	 * @return string the css class of the buttons.
+	 * @since 3.2.1
+	 */
+	public function getButtonCssClass()
+	{
+		return $this->getViewState('ButtonCssClass','');
+	}
+
+	/**
+	 * @param Sets the css class of the buttons that will be rendered by this pager.
+	 * @since 3.2.1
+	 */
+	public function setButtonCssClass($value)
+	{
+		$this->setViewState('ButtonCssClass',TPropertyValue::ensureString($value,''),'');
+	}
+
+	/**
+	 * @return TPagerMode pager mode. Defaults to TPagerMode::NextPrev.
+	 */
+	public function getMode()
+	{
+		return $this->getViewState('Mode',TPagerMode::NextPrev);
+	}
+
+	/**
+	 * @param TPagerMode pager mode.
+	 */
+	public function setMode($value)
+	{
+		$this->setViewState('Mode',TPropertyValue::ensureEnum($value,'TPagerMode'),TPagerMode::NextPrev);
+	}
+
+	/**
+	 * @return TPagerButtonType the type of command button for paging. Defaults to TPagerButtonType::LinkButton.
+	 */
+	public function getButtonType()
+	{
+		return $this->getViewState('ButtonType',TPagerButtonType::LinkButton);
+	}
+
+	/**
+	 * @param TPagerButtonType the type of command button for paging.
+	 */
+	public function setButtonType($value)
+	{
+		$this->setViewState('ButtonType',TPropertyValue::ensureEnum($value,'TPagerButtonType'),TPagerButtonType::LinkButton);
+	}
+
+	/**
+	 * @return string text for the next page button. Defaults to '>'.
+	 */
+	public function getNextPageText()
+	{
+		return $this->getViewState('NextPageText','>');
+	}
+
+	/**
+	 * @param string text for the next page button.
+	 */
+	public function setNextPageText($value)
+	{
+		$this->setViewState('NextPageText',$value,'>');
+	}
+
+	/**
+	 * @return string text for the previous page button. Defaults to '<'.
+	 */
+	public function getPrevPageText()
+	{
+		return $this->getViewState('PrevPageText','<');
+	}
+
+	/**
+	 * @param string text for the next page button.
+	 */
+	public function setPrevPageText($value)
+	{
+		$this->setViewState('PrevPageText',$value,'<');
+	}
+
+	/**
+	 * @return string text for the first page button. Defaults to '<<'.
+	 */
+	public function getFirstPageText()
+	{
+		return $this->getViewState('FirstPageText','<<');
+	}
+
+	/**
+	 * @param string text for the first page button. If empty, the first page button will not be rendered.
+	 */
+	public function setFirstPageText($value)
+	{
+		$this->setViewState('FirstPageText',$value,'<<');
+	}
+
+	/**
+	 * @return string text for the last page button. Defaults to '>>'.
+	 */
+	public function getLastPageText()
+	{
+		return $this->getViewState('LastPageText','>>');
+	}
+
+	/**
+	 * @param string text for the last page button. If empty, the last page button will not be rendered.
+	 */
+	public function setLastPageText($value)
+	{
+		$this->setViewState('LastPageText',$value,'>>');
+	}
+
+	/**
+	 * @return string the image URL for the first page button. This is only used when {@link getButtonType ButtonType} is 'ImageButton'.
+	 * @since 3.1.1
+	 */
+	public function getFirstPageImageUrl()
+	{
+		return $this->getViewState('FirstPageImageUrl','');
+	}
+
+	/**
+	 * @param string the image URL for the first page button. This is only used when {@link getButtonType ButtonType} is 'ImageButton'.
+	 * @since 3.1.1
+	 */
+	public function setFirstPageImageUrl($value)
+	{
+		$this->setViewState('FirstPageImageUrl',$value);
+	}
+
+	/**
+	 * @return string the image URL for the last page button. This is only used when {@link getButtonType ButtonType} is 'ImageButton'.
+	 * @since 3.1.1
+	 */
+	public function getLastPageImageUrl()
+	{
+		return $this->getViewState('LastPageImageUrl','');
+	}
+
+	/**
+	 * @param string the image URL for the last page button. This is only used when {@link getButtonType ButtonType} is 'ImageButton'.
+	 * @since 3.1.1
+	 */
+	public function setLastPageImageUrl($value)
+	{
+		$this->setViewState('LastPageImageUrl',$value);
+	}
+
+	/**
+	 * @return string the image URL for the next page button. This is only used when {@link getButtonType ButtonType} is 'ImageButton'.
+	 * @since 3.1.1
+	 */
+	public function getNextPageImageUrl()
+	{
+		return $this->getViewState('NextPageImageUrl','');
+	}
+
+	/**
+	 * @param string the image URL for the next page button. This is only used when {@link getButtonType ButtonType} is 'ImageButton'.
+	 * @since 3.1.1
+	 */
+	public function setNextPageImageUrl($value)
+	{
+		$this->setViewState('NextPageImageUrl',$value);
+	}
+
+	/**
+	 * @return string the image URL for the previous page button. This is only used when {@link getButtonType ButtonType} is 'ImageButton'.
+	 * @since 3.1.1
+	 */
+	public function getPrevPageImageUrl()
+	{
+		return $this->getViewState('PrevPageImageUrl','');
+	}
+
+	/**
+	 * @param string the image URL for the previous page button. This is only used when {@link getButtonType ButtonType} is 'ImageButton'.
+	 * @since 3.1.1
+	 */
+	public function setPrevPageImageUrl($value)
+	{
+		$this->setViewState('PrevPageImageUrl',$value);
+	}
+
+	/**
+	 * @return string the image URL for the numeric page buttons. This is only used when {@link getButtonType ButtonType} is 'ImageButton' and {@link getMode Mode} is 'Numeric'.
+	 * @see setNumericPageImageUrl
+	 * @since 3.1.1
+	 */
+	public function getNumericPageImageUrl()
+	{
+		return $this->getViewState('NumericPageImageUrl','');
+	}
+
+	/**
+	 * Sets the image URL for the numeric page buttons.
+	 * This is actually a template for generating a set of URLs corresponding to numeric button 1, 2, 3, .., etc.
+	 * Use {0} as the placeholder for the numbers.
+	 * For example, the image URL http://example.com/images/button{0}.gif
+	 * will be replaced as http://example.com/images/button1.gif, http://example.com/images/button2.gif, etc.
+	 * @param string the image URL for the numeric page buttons. This is only used when {@link getButtonType ButtonType} is 'ImageButton' and {@link getMode Mode} is 'Numeric'.
+	 * @since 3.1.1
+	 */
+	public function setNumericPageImageUrl($value)
+	{
+		$this->setViewState('NumericPageImageUrl',$value);
+	}
+
+	/**
+	 * @return integer maximum number of pager buttons to be displayed. Defaults to 10.
+	 */
+	public function getPageButtonCount()
+	{
+		return $this->getViewState('PageButtonCount',10);
+	}
+
+	/**
+	 * @param integer maximum number of pager buttons to be displayed
+	 * @throws TInvalidDataValueException if the value is less than 1.
+	 */
+	public function setPageButtonCount($value)
+	{
+		if(($value=TPropertyValue::ensureInteger($value))<1)
+			throw new TInvalidDataValueException('pager_pagebuttoncount_invalid');
+		$this->setViewState('PageButtonCount',$value,10);
+	}
+
+	/**
+	 * @return integer the zero-based index of the current page. Defaults to 0.
+	 */
+	public function getCurrentPageIndex()
+	{
+		return $this->getViewState('CurrentPageIndex',0);
+	}
+
+	/**
+	 * @param integer the zero-based index of the current page
+	 * @throws TInvalidDataValueException if the value is less than 0
+	 */
+	protected function setCurrentPageIndex($value)
+	{
+		if(($value=TPropertyValue::ensureInteger($value))<0)
+			throw new TInvalidDataValueException('pager_currentpageindex_invalid');
+		$this->setViewState('CurrentPageIndex',$value,0);
+	}
+
+	/**
+	 * @return integer number of pages of data items available
+	 */
+	public function getPageCount()
+	{
+		return $this->getViewState('PageCount',0);
+	}
+
+	/**
+	 * @param integer number of pages of data items available
+	 * @throws TInvalidDataValueException if the value is less than 0
+	 */
+	protected function setPageCount($value)
+	{
+		if(($value=TPropertyValue::ensureInteger($value))<0)
+			throw new TInvalidDataValueException('pager_pagecount_invalid');
+		$this->setViewState('PageCount',$value,0);
+	}
+
+	/**
+	 * @return boolean whether the current page is the first page Defaults to false.
+	 */
+	public function getIsFirstPage()
+	{
+		return $this->getCurrentPageIndex()===0;
+	}
+
+	/**
+	 * @return boolean whether the current page is the last page
+	 */
+	public function getIsLastPage()
+	{
+		return $this->getCurrentPageIndex()===$this->getPageCount()-1;
+	}
+
+	/**
+	 * Performs databinding to populate data items from data source.
+	 * This method is invoked by {@link dataBind()}.
+	 * You may override this function to provide your own way of data population.
+	 * @param Traversable the bound data
+	 */
+	public function onPreRender($param)
+	{
+		parent::onPreRender($param);
+
+		$controlID=$this->getControlToPaginate();
+		if(($targetControl=$this->getNamingContainer()->findControl($controlID))===null || !($targetControl instanceof TDataBoundControl))
+			throw new TConfigurationException('pager_controltopaginate_invalid',$controlID);
+
+		if($targetControl->getAllowPaging())
+		{
+	 		$this->_pageCount=$targetControl->getPageCount();
+			$this->getControls()->clear();
+			$this->setPageCount($targetControl->getPageCount());
+			$this->setCurrentPageIndex($targetControl->getCurrentPageIndex());
+			$this->buildPager();
+		}
+		else
+			$this->_pageCount=0;
+	}
+
+	/**
+	 * Renders the control.
+	 * The method overrides the parent implementation by rendering
+	 * the pager only when there are two or more pages.
+	 * @param THtmlWriter the writer
+	 */
+	public function render($writer)
+	{
+		if($this->_pageCount>1)
+			parent::render($writer);
+	}
+
+	/**
+	 * Builds the pager content based on the pager mode.
+	 * Current implementation includes building 'NextPrev', 'Numeric' and 'DropDownList' pagers.
+	 * Derived classes may override this method to provide additional pagers.
+	 */
+	protected function buildPager()
+	{
+		switch($this->getMode())
+		{
+			case TPagerMode::NextPrev:
+				$this->buildNextPrevPager();
+				break;
+			case TPagerMode::Numeric:
+				$this->buildNumericPager();
+				break;
+			case TPagerMode::DropDownList:
+				$this->buildListPager();
+				break;
+		}
+	}
+
+	/**
+	 * Creates a pager button.
+	 * Depending on the button type, a TLinkButton or a TButton may be created.
+	 * If it is enabled (clickable), its command name and parameter will also be set.
+	 * Derived classes may override this method to create additional types of buttons, such as TImageButton.
+	 * @param string button type, either LinkButton or PushButton
+	 * @param boolean whether the button should be enabled
+	 * @param string caption of the button.
+	 * @param string CommandName corresponding to the OnCommand event of the button.
+	 * @param string CommandParameter corresponding to the OnCommand event of the button
+	 * @return mixed the button instance
+	 */
+	protected function createPagerButton($buttonType,$enabled,$text,$commandName,$commandParameter)
+	{
+		if($buttonType===TPagerButtonType::LinkButton)
+		{
+			if($enabled)
+				$button=new TLinkButton;
+			else
+			{
+				$button=new TLabel;
+				$button->setText($text);
+				$button->setCssClass($this->getButtonCssClass());
+				return $button;
+			}
+		}
+		else
+		{
+			if($buttonType===TPagerButtonType::ImageButton)
+			{
+				$button=new TImageButton;
+				$button->setImageUrl($this->getPageImageUrl($text,$commandName));
+			}
+			else
+				$button=new TButton;
+			if(!$enabled)
+				$button->setEnabled(false);
+		}
+		$button->setText($text);
+		$button->setCommandName($commandName);
+		$button->setCommandParameter($commandParameter);
+		$button->setCausesValidation(false);
+		$button->setCssClass($this->getButtonCssClass());
+		return $button;
+	}
+
+	/**
+	 * @param string the caption of the image button
+	 * @param string the command name associated with the image button
+	 * @since 3.1.1
+	 */
+	protected function getPageImageUrl($text,$commandName)
+	{
+		switch($commandName)
+		{
+			case self::CMD_PAGE:
+				$url=$this->getNumericPageImageUrl();
+				return str_replace('{0}',$text,$url);
+			case self::CMD_PAGE_NEXT:
+				return $this->getNextPageImageUrl();
+			case self::CMD_PAGE_PREV:
+				return $this->getPrevPageImageUrl();
+			case self::CMD_PAGE_FIRST:
+				return $this->getFirstPageImageUrl();
+			case self::CMD_PAGE_LAST:
+				return $this->getLastPageImageUrl();
+			default:
+				return '';
+		}
+	}
+
+	/**
+	 * Builds a next-prev pager
+	 */
+	protected function buildNextPrevPager()
+	{
+		$buttonType=$this->getButtonType();
+		$controls=$this->getControls();
+		if($this->getIsFirstPage())
+		{
+			if(($text=$this->getFirstPageText())!=='')
+			{
+				$label=$this->createPagerButton($buttonType,false,$text,self::CMD_PAGE_FIRST,'');
+				$controls->add($label);
+				$controls->add("\n");
+			}
+			$label=$this->createPagerButton($buttonType,false,$this->getPrevPageText(),self::CMD_PAGE_PREV,'');
+			$controls->add($label);
+		}
+		else
+		{
+			if(($text=$this->getFirstPageText())!=='')
+			{
+				$button=$this->createPagerButton($buttonType,true,$text,self::CMD_PAGE_FIRST,'');
+				$controls->add($button);
+				$controls->add("\n");
+			}
+			$button=$this->createPagerButton($buttonType,true,$this->getPrevPageText(),self::CMD_PAGE_PREV,'');
+			$controls->add($button);
+		}
+		$controls->add("\n");
+		if($this->getIsLastPage())
+		{
+			$label=$this->createPagerButton($buttonType,false,$this->getNextPageText(),self::CMD_PAGE_NEXT,'');
+			$controls->add($label);
+			if(($text=$this->getLastPageText())!=='')
+			{
+				$controls->add("\n");
+				$label=$this->createPagerButton($buttonType,false,$text,self::CMD_PAGE_LAST,'');
+				$controls->add($label);
+			}
+		}
+		else
+		{
+			$button=$this->createPagerButton($buttonType,true,$this->getNextPageText(),self::CMD_PAGE_NEXT,'');
+			$controls->add($button);
+			if(($text=$this->getLastPageText())!=='')
+			{
+				$controls->add("\n");
+				$button=$this->createPagerButton($buttonType,true,$text,self::CMD_PAGE_LAST,'');
+				$controls->add($button);
+			}
+		}
+	}
+
+	/**
+	 * Builds a numeric pager
+	 */
+	protected function buildNumericPager()
+	{
+		$buttonType=$this->getButtonType();
+		$controls=$this->getControls();
+		$pageCount=$this->getPageCount();
+		$pageIndex=$this->getCurrentPageIndex()+1;
+		$maxButtonCount=$this->getPageButtonCount();
+		$buttonCount=$maxButtonCount>$pageCount?$pageCount:$maxButtonCount;
+		$startPageIndex=1;
+		$endPageIndex=$buttonCount;
+		if($pageIndex>$endPageIndex)
+		{
+			$startPageIndex=((int)(($pageIndex-1)/$maxButtonCount))*$maxButtonCount+1;
+			if(($endPageIndex=$startPageIndex+$maxButtonCount-1)>$pageCount)
+				$endPageIndex=$pageCount;
+			if($endPageIndex-$startPageIndex+1<$maxButtonCount)
+			{
+				if(($startPageIndex=$endPageIndex-$maxButtonCount+1)<1)
+					$startPageIndex=1;
+			}
+		}
+
+		if($startPageIndex>1)
+		{
+			if(($text=$this->getFirstPageText())!=='')
+			{
+				$button=$this->createPagerButton($buttonType,true,$text,self::CMD_PAGE_FIRST,'');
+				$controls->add($button);
+				$controls->add("\n");
+			}
+			$prevPageIndex=$startPageIndex-1;
+			$button=$this->createPagerButton($buttonType,true,$this->getPrevPageText(),self::CMD_PAGE,"$prevPageIndex");
+			$controls->add($button);
+			$controls->add("\n");
+		}
+
+		for($i=$startPageIndex;$i<=$endPageIndex;++$i)
+		{
+			if($i===$pageIndex)
+			{
+				$label=$this->createPagerButton($buttonType,false,"$i",self::CMD_PAGE,'');
+				$controls->add($label);
+			}
+			else
+			{
+				$button=$this->createPagerButton($buttonType,true,"$i",self::CMD_PAGE,"$i");
+				$controls->add($button);
+			}
+			if($i<$endPageIndex)
+				$controls->add("\n");
+		}
+
+		if($pageCount>$endPageIndex)
+		{
+			$controls->add("\n");
+			$nextPageIndex=$endPageIndex+1;
+			$button=$this->createPagerButton($buttonType,true,$this->getNextPageText(),self::CMD_PAGE,"$nextPageIndex");
+			$controls->add($button);
+			if(($text=$this->getLastPageText())!=='')
+			{
+				$controls->add("\n");
+				$button=$this->createPagerButton($buttonType,true,$text,self::CMD_PAGE_LAST,'');
+				$controls->add($button);
+			}
+		}
+	}
+
+	/**
+	 * Builds a dropdown list pager
+	 */
+	protected function buildListPager()
+	{
+		$list=new TDropDownList;
+		$this->getControls()->add($list);
+		$list->setDataSource(range(1,$this->getPageCount()));
+		$list->dataBind();
+		$list->setSelectedIndex($this->getCurrentPageIndex());
+		$list->setAutoPostBack(true);
+		$list->attachEventHandler('OnSelectedIndexChanged',array($this,'listIndexChanged'));
+	}
+
+	/**
+	 * Event handler to the OnSelectedIndexChanged event of the dropdown list.
+	 * This handler will raise {@link onPageIndexChanged OnPageIndexChanged} event.
+	 * @param TDropDownList the dropdown list control raising the event
+	 * @param TEventParameter event parameter
+	 */
+	public function listIndexChanged($sender,$param)
+	{
+		$pageIndex=$sender->getSelectedIndex();
+		$this->onPageIndexChanged(new TPagerPageChangedEventParameter($sender,$pageIndex));
+	}
+
+	/**
+	 * This event is raised when page index is changed due to a page button click.
+	 * @param TPagerPageChangedEventParameter event parameter
+	 */
+	public function onPageIndexChanged($param)
+	{
+		$this->raiseEvent('OnPageIndexChanged',$this,$param);
+	}
+
+	/**
+	 * Processes a bubbled event.
+	 * This method overrides parent's implementation by wrapping event parameter
+	 * for <b>OnCommand</b> event with item information.
+	 * @param TControl the sender of the event
+	 * @param TEventParameter event parameter
+	 * @return boolean whether the event bubbling should stop here.
+	 */
+	public function bubbleEvent($sender,$param)
+	{
+		if($param instanceof TCommandEventParameter)
+		{
+			$command=$param->getCommandName();
+			if(strcasecmp($command,self::CMD_PAGE)===0)
+			{
+				$pageIndex=TPropertyValue::ensureInteger($param->getCommandParameter())-1;
+				$this->onPageIndexChanged(new TPagerPageChangedEventParameter($sender,$pageIndex));
+				return true;
+			}
+			else if(strcasecmp($command,self::CMD_PAGE_NEXT)===0)
+			{
+				$pageIndex=$this->getCurrentPageIndex()+1;
+				$this->onPageIndexChanged(new TPagerPageChangedEventParameter($sender,$pageIndex));
+				return true;
+			}
+			else if(strcasecmp($command,self::CMD_PAGE_PREV)===0)
+			{
+				$pageIndex=$this->getCurrentPageIndex()-1;
+				$this->onPageIndexChanged(new TPagerPageChangedEventParameter($sender,$pageIndex));
+				return true;
+			}
+			else if(strcasecmp($command,self::CMD_PAGE_FIRST)===0)
+			{
+				$this->onPageIndexChanged(new TPagerPageChangedEventParameter($sender,0));
+				return true;
+			}
+			else if(strcasecmp($command,self::CMD_PAGE_LAST)===0)
+			{
+				$this->onPageIndexChanged(new TPagerPageChangedEventParameter($sender,$this->getPageCount()-1));
+				return true;
+			}
+			return false;
+		}
+		else
+			return false;
+	}
+}
+
+/**
+ * TPagerPageChangedEventParameter class
+ *
+ * TPagerPageChangedEventParameter encapsulates the parameter data for
+ * {@link TPager::onPageIndexChanged PageIndexChanged} event of {@link TPager} controls.
+ *
+ * The {@link getCommandSource CommandSource} property refers to the control
+ * that originally raises the OnCommand event, while {@link getNewPageIndex NewPageIndex}
+ * returns the new page index carried with the page command.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Web.UI.WebControls
+ * @since 3.0.2
+ */
+class TPagerPageChangedEventParameter extends TEventParameter
+{
+	/**
+	 * @var integer new page index
+	 */
+	private $_newIndex;
+	/**
+	 * @var TControl original event sender
+	 */
+	private $_source=null;
+
+	/**
+	 * Constructor.
+	 * @param TControl the control originally raises the <b>OnCommand</b> event.
+	 * @param integer new page index
+	 */
+	public function __construct($source,$newPageIndex)
+	{
+		$this->_source=$source;
+		$this->_newIndex=$newPageIndex;
+	}
+
+	/**
+	 * @return TControl the control originally raises the <b>OnCommand</b> event.
+	 */
+	public function getCommandSource()
+	{
+		return $this->_source;
+	}
+
+	/**
+	 * @return integer new page index
+	 */
+	public function getNewPageIndex()
+	{
+		return $this->_newIndex;
+	}
+}
+
+
+/**
+ * TPagerMode class.
+ * TPagerMode defines the enumerable type for the possible modes that a {@link TPager} control can take.
+ *
+ * The following enumerable values are defined:
+ * - NextPrev: pager buttons are displayed as next and previous pages
+ * - Numeric: pager buttons are displayed as numeric page numbers
+ * - DropDownList: a dropdown list is used to select pages
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Web.UI.WebControls
+ * @since 3.0.4
+ */
+class TPagerMode extends TEnumerable
+{
+	const NextPrev='NextPrev';
+	const Numeric='Numeric';
+	const DropDownList='DropDownList';
+}
+
+
+/**
+ * TPagerButtonType class.
+ * TPagerButtonType defines the enumerable type for the possible types of pager buttons.
+ *
+ * The following enumerable values are defined:
+ * - LinkButton: link buttons
+ * - PushButton: form submit buttons
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Web.UI.WebControls
+ * @since 3.0.4
+ */
+class TPagerButtonType extends TEnumerable
+{
+	const LinkButton='LinkButton';
+	const PushButton='PushButton';
+	const ImageButton='ImageButton';
+}
+