1 files changed, 587 insertions, 587 deletions
diff --git a/framework/Web/UI/WebControls/TDataBoundControl.php b/framework/Web/UI/WebControls/TDataBoundControl.php
index 294dd416..076179fb 100644
--- a/framework/Web/UI/WebControls/TDataBoundControl.php
+++ b/framework/Web/UI/WebControls/TDataBoundControl.php
@@ -1,587 +1,587 @@
-<?php
-/**
- * TDataBoundControl class file
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.pradosoft.com/
- * @copyright Copyright &copy; 2005-2012 PradoSoft
- * @license http://www.pradosoft.com/license/
- * @version $Id$
- * @package System.Web.UI.WebControls
- */
-
-Prado::using('System.Web.UI.WebControls.TDataSourceControl');
-Prado::using('System.Web.UI.WebControls.TDataSourceView');
-Prado::using('System.Collections.TPagedDataSource');
-
-/**
- * TDataBoundControl class.
- *
- * TDataBoundControl is the based class for controls that need to populate
- * data from data sources. It provides basic properties and methods that allow
- * the derived controls to associate with data sources and retrieve data from them.
- *
- * TBC....
- *
- * TDataBoundControl is equipped with paging capabilities. By setting
- * {@link setAllowPaging AllowPaging} to true, the input data will be paged
- * and only one page of data is actually populated into the data-bound control.
- * This saves a lot of memory when dealing with larget datasets.
- *
- * To specify the number of data items displayed on each page, set
- * the {@link setPageSize PageSize} property, and to specify which
- * page of data to be displayed, set {@link setCurrentPageIndex CurrentPageIndex}.
- *
- * When the size of the original data is too big to be loaded all in the memory,
- * one can enable custom paging. In custom paging, the total number of data items
- * is specified manually via {@link setVirtualItemCount VirtualItemCount},
- * and the data source only needs to contain the current page of data. To enable
- * custom paging, set {@link setAllowCustomPaging AllowCustomPaging} to true.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Web.UI.WebControls
- * @since 3.0
- */
-abstract class TDataBoundControl extends TWebControl
-{
-	private $_initialized=false;
-	private $_dataSource=null;
-	private $_requiresBindToNull=false;
-	private $_requiresDataBinding=false;
-	private $_prerendered=false;
-	private $_currentView=null;
-	private $_currentDataSource=null;
-	private $_currentViewValid=false;
-	private $_currentDataSourceValid=false;
-	private $_currentViewIsFromDataSourceID=false;
-	private $_parameters=null;
-	private $_isDataBound=false;
-
-	/**
-	 * @return Traversable data source object, defaults to null.
-	 */
-	public function getDataSource()
-	{
-		return $this->_dataSource;
-	}
-
-	/**
-	 * Sets the data source object associated with the databound control.
-	 * The data source must implement Traversable interface.
-	 * If an array is given, it will be converted to xxx.
-	 * If a string is given, it will be converted to xxx.
-	 * @param Traversable|array|string data source object
-	 */
-	public function setDataSource($value)
-	{
-		$this->_dataSource=$this->validateDataSource($value);
-		$this->onDataSourceChanged();
-	}
-
-	/**
-	 * @return string ID path to the data source control. Defaults to empty.
-	 */
-	public function getDataSourceID()
-	{
-		return $this->getViewState('DataSourceID','');
-	}
-
-	/**
-	 * @param string ID path to the data source control. The data source
-	 * control must be locatable via {@link TControl::findControl} call.
-	 */
-	public function setDataSourceID($value)
-	{
-		$dsid=$this->getViewState('DataSourceID','');
-		if($dsid!=='' && $value==='')
-			$this->_requiresBindToNull=true;
-		$this->setViewState('DataSourceID',$value,'');
-		$this->onDataSourceChanged();
-	}
-
-	/**
-	 * @return boolean if the databound control uses the data source specified
-	 * by {@link setDataSourceID}, or it uses the data source object specified
-	 * by {@link setDataSource}.
-	 */
-	protected function getUsingDataSourceID()
-	{
-		return $this->getDataSourceID()!=='';
-	}
-
-	/**
-	 * Sets {@link setRequiresDataBinding RequiresDataBinding} as true if the control is initialized.
-	 * This method is invoked when either {@link setDataSource} or {@link setDataSourceID} is changed.
-	 */
-	public function onDataSourceChanged()
-	{
-		$this->_currentViewValid=false;
-		$this->_currentDataSourceValid=false;
-		if($this->getInitialized())
-			$this->setRequiresDataBinding(true);
-	}
-
-	/**
-	 * @return boolean whether the databound control has been initialized.
-	 * By default, the control is initialized after its viewstate has been restored.
-	 */
-	protected function getInitialized()
-	{
-		return $this->_initialized;
-	}
-
-	/**
-	 * Sets a value indicating whether the databound control is initialized.
-	 * If initialized, any modification to {@link setDataSource DataSource} or
-	 * {@link setDataSourceID DataSourceID} will set {@link setRequiresDataBinding RequiresDataBinding}
-	 * as true.
-	 * @param boolean a value indicating whether the databound control is initialized.
-	 */
-	protected function setInitialized($value)
-	{
-		$this->_initialized=TPropertyValue::ensureBoolean($value);
-	}
-
-	/**
-	 * @return boolean whether databind has been invoked in the previous page request
-	 */
-	protected function getIsDataBound()
-	{
-		return $this->_isDataBound;
-	}
-
-	/**
-	 * @param boolean if databind has been invoked in this page request
-	 */
-	protected function setIsDataBound($value)
-	{
-		$this->_isDataBound=$value;
-	}
-
-	/**
-	 * @return boolean whether a databind call is required (by the data bound control)
-	 */
-	protected function getRequiresDataBinding()
-	{
-		return $this->_requiresDataBinding;
-	}
-
-	/**
-	 * @return boolean whether paging is enabled. Defaults to false.
-	 */
-	public function getAllowPaging()
-	{
-		return $this->getViewState('AllowPaging',false);
-	}
-
-	/**
-	 * @param boolean whether paging is enabled
-	 */
-	public function setAllowPaging($value)
-	{
-		$this->setViewState('AllowPaging',TPropertyValue::ensureBoolean($value),false);
-	}
-
-	/**
-	 * @return boolean whether the custom paging is enabled. Defaults to false.
-	 */
-	public function getAllowCustomPaging()
-	{
-		return $this->getViewState('AllowCustomPaging',false);
-	}
-
-	/**
-	 * Sets a value indicating whether the custom paging should be enabled.
-	 * When the pager is in custom paging mode, the {@link setVirtualItemCount VirtualItemCount}
-	 * property is used to determine the paging, and the data items in the
-	 * {@link setDataSource DataSource} are considered to be in the current page.
-	 * @param boolean whether the custom paging is enabled
-	 */
-	public function setAllowCustomPaging($value)
-	{
-		$this->setViewState('AllowCustomPaging',TPropertyValue::ensureBoolean($value),false);
-	}
-
-	/**
-	 * @return integer the zero-based index of the current page. Defaults to 0.
-	 */
-	public function getCurrentPageIndex()
-	{
-		return $this->getViewState('CurrentPageIndex',0);
-	}
-
-	/**
-	 * @param integer the zero-based index of the current page
-	 * @throws TInvalidDataValueException if the value is less than 0
-	 */
-	public function setCurrentPageIndex($value)
-	{
-		if(($value=TPropertyValue::ensureInteger($value))<0)
-			$value=0;
-		$this->setViewState('CurrentPageIndex',$value,0);
-	}
-
-	/**
-	 * @return integer the number of data items on each page. Defaults to 10.
-	 */
-	public function getPageSize()
-	{
-		return $this->getViewState('PageSize',10);
-	}
-
-	/**
-	 * @param integer the number of data items on each page.
-	 * @throws TInvalidDataValueException if the value is less than 1
-	 */
-	public function setPageSize($value)
-	{
-		if(($value=TPropertyValue::ensureInteger($value))<1)
-			throw new TInvalidDataValueException('databoundcontrol_pagesize_invalid',get_class($this));
-		$this->setViewState('PageSize',TPropertyValue::ensureInteger($value),10);
-	}
-
-	/**
-	 * @return integer number of pages of data items available
-	 */
-	public function getPageCount()
-	{
-		return $this->getViewState('PageCount',1);
-	}
-
-	/**
-	 * @return integer virtual number of data items in the data source. Defaults to 0.
-	 * @see setAllowCustomPaging
-	 */
-	public function getVirtualItemCount()
-	{
-		return $this->getViewState('VirtualItemCount',0);
-	}
-
-	/**
-	 * @param integer virtual number of data items in the data source.
-	 * @throws TInvalidDataValueException if the value is less than 0
-	 * @see setAllowCustomPaging
-	 */
-	public function setVirtualItemCount($value)
-	{
-		if(($value=TPropertyValue::ensureInteger($value))<0)
-			throw new TInvalidDataValueException('databoundcontrol_virtualitemcount_invalid',get_class($this));
-		$this->setViewState('VirtualItemCount',$value,0);
-	}
-
-	/**
-	 * Sets a value indicating whether a databind call is required by the data bound control.
-	 * If true and the control has been prerendered while it uses the data source
-	 * specified by {@link setDataSourceID}, a databind call will be called by this method.
-	 * @param boolean whether a databind call is required.
-	 */
-	protected function setRequiresDataBinding($value)
-	{
-		$value=TPropertyValue::ensureBoolean($value);
-		if($value && $this->_prerendered)
-		{
-			$this->_requiresDataBinding=true;
-			$this->ensureDataBound();
-		}
-		else
-			$this->_requiresDataBinding=$value;
-	}
-
-	/**
-	 * Ensures any pending {@link dataBind} is called.
-	 * This method calls {@link dataBind} if the data source is specified
-	 * by {@link setDataSourceID} or if {@link getRequiresDataBinding RequiresDataBinding}
-	 * is true.
-	 */
-	protected function ensureDataBound()
-	{
-		if($this->_requiresDataBinding && ($this->getUsingDataSourceID() || $this->_requiresBindToNull))
-		{
-			$this->dataBind();
-			$this->_requiresBindToNull=false;
-		}
-	}
-
-	/**
-	 * @return TPagedDataSource creates a paged data source
-	 */
-	protected function createPagedDataSource()
-	{
-		$ds=new TPagedDataSource;
-		$ds->setCurrentPageIndex($this->getCurrentPageIndex());
-		$ds->setPageSize($this->getPageSize());
-		$ds->setAllowPaging($this->getAllowPaging());
-		$ds->setAllowCustomPaging($this->getAllowCustomPaging());
-		$ds->setVirtualItemCount($this->getVirtualItemCount());
-		return $ds;
-	}
-
-	/**
-	 * Performs databinding.
-	 * This method overrides the parent implementation by calling
-	 * {@link performSelect} which fetches data from data source and does
-	 * the actual binding work.
-	 */
-	public function dataBind()
-	{
-		$this->setRequiresDataBinding(false);
-		$this->dataBindProperties();
-		$this->onDataBinding(null);
-
-		if(($view=$this->getDataSourceView())!==null)
-			$data=$view->select($this->getSelectParameters());
-		else
-			$data=null;
-
-		if($data instanceof Traversable)
-		{
-			if($this->getAllowPaging())
-			{
-				$ds=$this->createPagedDataSource();
-				$ds->setDataSource($data);
-				$this->setViewState('PageCount',$ds->getPageCount());
-				if($ds->getCurrentPageIndex()>=$ds->getPageCount())
-				{
-					$ds->setCurrentPageIndex($ds->getPageCount()-1);
-					$this->setCurrentPageIndex($ds->getCurrentPageIndex());
-				}
-				$this->performDataBinding($ds);
-			}
-			else
-			{
-				$this->clearViewState('PageCount');
-				$this->performDataBinding($data);
-			}
-		}
-		$this->setIsDataBound(true);
-		$this->onDataBound(null);
-	}
-
-	public function dataSourceViewChanged($sender,$param)
-	{
-		if(!$this->_ignoreDataSourceViewChanged)
-			$this->setRequiresDataBinding(true);
-	}
-
-	protected function getDataSourceView()
-	{
-		if(!$this->_currentViewValid)
-		{
-			if($this->_currentView && $this->_currentViewIsFromDataSourceID)
-				$this->_currentView->detachEventHandler('DataSourceViewChanged',array($this,'dataSourceViewChanged'));
-			if(($dataSource=$this->determineDataSource())!==null)
-			{
-				if(($view=$dataSource->getView($this->getDataMember()))===null)
-					throw new TInvalidDataValueException('databoundcontrol_datamember_invalid',$this->getDataMember());
-				if($this->_currentViewIsFromDataSourceID=$this->getUsingDataSourceID())
-					$view->attachEventHandler('OnDataSourceViewChanged',array($this,'dataSourceViewChanged'));
-				$this->_currentView=$view;
-			}
-			else
-				$this->_currentView=null;
-			$this->_currentViewValid=true;
-		}
-		return $this->_currentView;
-	}
-
-	protected function determineDataSource()
-	{
-		if(!$this->_currentDataSourceValid)
-		{
-			if(($dsid=$this->getDataSourceID())!=='')
-			{
-				if(($dataSource=$this->getNamingContainer()->findControl($dsid))===null)
-					throw new TInvalidDataValueException('databoundcontrol_datasourceid_inexistent',$dsid);
-				else if(!($dataSource instanceof IDataSource))
-					throw new TInvalidDataValueException('databoundcontrol_datasourceid_invalid',$dsid);
-				else
-					$this->_currentDataSource=$dataSource;
-			}
-			else if(($dataSource=$this->getDataSource())!==null)
-				$this->_currentDataSource=new TReadOnlyDataSource($dataSource,$this->getDataMember());
-			else
-				$this->_currentDataSource=null;
-			$this->_currentDataSourceValid=true;
-		}
-		return $this->_currentDataSource;
-	}
-
-	abstract protected function performDataBinding($data);
-
-	/**
-	 * Raises <b>OnDataBound</b> event.
-	 * This method should be invoked after a databind is performed.
-	 * It is mainly used by framework and component developers.
-	 */
-	public function onDataBound($param)
-	{
-		$this->raiseEvent('OnDataBound',$this,$param);
-	}
-
-	/**
-	 * Sets page's <b>OnPreLoad</b> event handler as {@link pagePreLoad}.
-	 * If viewstate is disabled and the current request is a postback,
-	 * {@link setRequiresDataBinding RequiresDataBinding} will be set true.
-	 * This method overrides the parent implementation.
-	 * @param TEventParameter event parameter
-	 */
-	public function onInit($param)
-	{
-		parent::onInit($param);
-		$page=$this->getPage();
-		$page->attachEventHandler('OnPreLoad',array($this,'pagePreLoad'));
-	}
-
-	/**
-	 * Sets {@link getInitialized} as true.
-	 * This method is invoked when page raises <b>PreLoad</b> event.
-	 * @param mixed event sender
-	 * @param TEventParameter event parameter
-	 */
-	public function pagePreLoad($sender,$param)
-	{
-		$this->_initialized=true;
-		$isPostBack=$this->getPage()->getIsPostBack();
-		if(!$isPostBack || ($isPostBack && (!$this->getEnableViewState(true) || !$this->getIsDataBound())))
-			$this->setRequiresDataBinding(true);
-	}
-
-	/**
-	 * Ensures any pending databind is performed.
-	 * This method overrides the parent implementation.
-	 * @param TEventParameter event parameter
-	 */
-	public function onPreRender($param)
-	{
-		$this->_prerendered=true;
-		$this->ensureDataBound();
-		parent::onPreRender($param);
-	}
-
-	/**
-	 * Validates if the parameter is a valid data source.
-	 * If it is a string or an array, it will be converted as a TList object.
-	 * @param Traversable|array|string data source to be validated
-	 * @return Traversable the data that is traversable
-	 * @throws TInvalidDataTypeException if the data is neither null nor Traversable
-	 */
-	protected function validateDataSource($value)
-	{
-		if(is_string($value))
-		{
-			$list=new TList;
-			foreach(TPropertyValue::ensureArray($value) as $key=>$value)
-			{
-				if(is_array($value))
-					$list->add($value);
-				else
-					$list->add(array($value,is_string($key)?$key:$value));
-			}
-			return $list;
-		}
-		else if(is_array($value))
-			return new TMap($value);
-		else if($value instanceof TDbDataReader) {
-			// read array from TDbDataReader since it's forward-only stream and can only be traversed once
-			return $value->readAll();
-		}
-		else if(($value instanceof Traversable) || $value===null)
-			return $value;
-		else
-			throw new TInvalidDataTypeException('databoundcontrol_datasource_invalid',get_class($this));
-	}
-
-	public function getDataMember()
-	{
-		return $this->getViewState('DataMember','');
-	}
-
-	public function setDataMember($value)
-	{
-		$this->setViewState('DataMember',$value,'');
-	}
-
-	public function getSelectParameters()
-	{
-		if(!$this->_parameters)
-			$this->_parameters=new TDataSourceSelectParameters;
-		return $this->_parameters;
-	}
-}
-
-
-/**
- * TListItemType class.
- * TListItemType defines the enumerable type for the possible types
- * that databound list items could take.
- *
- * The following enumerable values are defined:
- * - Header: header item
- * - Footer: footer item
- * - Item: content item (neither header nor footer)
- * - Separator: separator between items
- * - AlternatingItem: alternating content item
- * - EditItem: content item in edit mode
- * - SelectedItem: selected content item
- * - Pager: pager
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Web.UI.WebControls
- * @since 3.0.4
- */
-class TListItemType extends TEnumerable
-{
-	const Header='Header';
-	const Footer='Footer';
-	const Item='Item';
-	const Separator='Separator';
-	const AlternatingItem='AlternatingItem';
-	const EditItem='EditItem';
-	const SelectedItem='SelectedItem';
-	const Pager='Pager';
-}
-
-
-/**
- * IItemDataRenderer interface.
- *
- * IItemDataRenderer defines the interface that an item renderer
- * needs to implement. Besides the {@link getData Data} property, a list item
- * renderer also needs to provide {@link getItemIndex ItemIndex} and
- * {@link getItemType ItemType} property.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
- * @package System.Web.UI.WebControls
- * @since 3.1.0
- */
-interface IItemDataRenderer extends IDataRenderer
-{
-	/**
-	 * Returns a value indicating the zero-based index of the item in the corresponding data control's item collection.
-	 * If the item is not in the collection (e.g. it is a header item), it returns -1.
-	 * @return integer zero-based index of the item.
-	 */
-	public function getItemIndex();
-
-	/**
-	 * Sets the zero-based index for the item.
-	 * If the item is not in the item collection (e.g. it is a header item), -1 should be used.
-	 * @param integer zero-based index of the item.
-	 */
-	public function setItemIndex($value);
-
-	/**
-	 * @return TListItemType the item type.
-	 */
-	public function getItemType();
-
-	/**
-	 * @param TListItemType the item type.
-	 */
-	public function setItemType($value);
-}
-
-?>
+<?php
+/**
+ * TDataBoundControl class file
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright &copy; 2005-2012 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @version $Id$
+ * @package System.Web.UI.WebControls
+ */
+
+Prado::using('System.Web.UI.WebControls.TDataSourceControl');
+Prado::using('System.Web.UI.WebControls.TDataSourceView');
+Prado::using('System.Collections.TPagedDataSource');
+
+/**
+ * TDataBoundControl class.
+ *
+ * TDataBoundControl is the based class for controls that need to populate
+ * data from data sources. It provides basic properties and methods that allow
+ * the derived controls to associate with data sources and retrieve data from them.
+ *
+ * TBC....
+ *
+ * TDataBoundControl is equipped with paging capabilities. By setting
+ * {@link setAllowPaging AllowPaging} to true, the input data will be paged
+ * and only one page of data is actually populated into the data-bound control.
+ * This saves a lot of memory when dealing with larget datasets.
+ *
+ * To specify the number of data items displayed on each page, set
+ * the {@link setPageSize PageSize} property, and to specify which
+ * page of data to be displayed, set {@link setCurrentPageIndex CurrentPageIndex}.
+ *
+ * When the size of the original data is too big to be loaded all in the memory,
+ * one can enable custom paging. In custom paging, the total number of data items
+ * is specified manually via {@link setVirtualItemCount VirtualItemCount},
+ * and the data source only needs to contain the current page of data. To enable
+ * custom paging, set {@link setAllowCustomPaging AllowCustomPaging} to true.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id$
+ * @package System.Web.UI.WebControls
+ * @since 3.0
+ */
+abstract class TDataBoundControl extends TWebControl
+{
+	private $_initialized=false;
+	private $_dataSource=null;
+	private $_requiresBindToNull=false;
+	private $_requiresDataBinding=false;
+	private $_prerendered=false;
+	private $_currentView=null;
+	private $_currentDataSource=null;
+	private $_currentViewValid=false;
+	private $_currentDataSourceValid=false;
+	private $_currentViewIsFromDataSourceID=false;
+	private $_parameters=null;
+	private $_isDataBound=false;
+
+	/**
+	 * @return Traversable data source object, defaults to null.
+	 */
+	public function getDataSource()
+	{
+		return $this->_dataSource;
+	}
+
+	/**
+	 * Sets the data source object associated with the databound control.
+	 * The data source must implement Traversable interface.
+	 * If an array is given, it will be converted to xxx.
+	 * If a string is given, it will be converted to xxx.
+	 * @param Traversable|array|string data source object
+	 */
+	public function setDataSource($value)
+	{
+		$this->_dataSource=$this->validateDataSource($value);
+		$this->onDataSourceChanged();
+	}
+
+	/**
+	 * @return string ID path to the data source control. Defaults to empty.
+	 */
+	public function getDataSourceID()
+	{
+		return $this->getViewState('DataSourceID','');
+	}
+
+	/**
+	 * @param string ID path to the data source control. The data source
+	 * control must be locatable via {@link TControl::findControl} call.
+	 */
+	public function setDataSourceID($value)
+	{
+		$dsid=$this->getViewState('DataSourceID','');
+		if($dsid!=='' && $value==='')
+			$this->_requiresBindToNull=true;
+		$this->setViewState('DataSourceID',$value,'');
+		$this->onDataSourceChanged();
+	}
+
+	/**
+	 * @return boolean if the databound control uses the data source specified
+	 * by {@link setDataSourceID}, or it uses the data source object specified
+	 * by {@link setDataSource}.
+	 */
+	protected function getUsingDataSourceID()
+	{
+		return $this->getDataSourceID()!=='';
+	}
+
+	/**
+	 * Sets {@link setRequiresDataBinding RequiresDataBinding} as true if the control is initialized.
+	 * This method is invoked when either {@link setDataSource} or {@link setDataSourceID} is changed.
+	 */
+	public function onDataSourceChanged()
+	{
+		$this->_currentViewValid=false;
+		$this->_currentDataSourceValid=false;
+		if($this->getInitialized())
+			$this->setRequiresDataBinding(true);
+	}
+
+	/**
+	 * @return boolean whether the databound control has been initialized.
+	 * By default, the control is initialized after its viewstate has been restored.
+	 */
+	protected function getInitialized()
+	{
+		return $this->_initialized;
+	}
+
+	/**
+	 * Sets a value indicating whether the databound control is initialized.
+	 * If initialized, any modification to {@link setDataSource DataSource} or
+	 * {@link setDataSourceID DataSourceID} will set {@link setRequiresDataBinding RequiresDataBinding}
+	 * as true.
+	 * @param boolean a value indicating whether the databound control is initialized.
+	 */
+	protected function setInitialized($value)
+	{
+		$this->_initialized=TPropertyValue::ensureBoolean($value);
+	}
+
+	/**
+	 * @return boolean whether databind has been invoked in the previous page request
+	 */
+	protected function getIsDataBound()
+	{
+		return $this->_isDataBound;
+	}
+
+	/**
+	 * @param boolean if databind has been invoked in this page request
+	 */
+	protected function setIsDataBound($value)
+	{
+		$this->_isDataBound=$value;
+	}
+
+	/**
+	 * @return boolean whether a databind call is required (by the data bound control)
+	 */
+	protected function getRequiresDataBinding()
+	{
+		return $this->_requiresDataBinding;
+	}
+
+	/**
+	 * @return boolean whether paging is enabled. Defaults to false.
+	 */
+	public function getAllowPaging()
+	{
+		return $this->getViewState('AllowPaging',false);
+	}
+
+	/**
+	 * @param boolean whether paging is enabled
+	 */
+	public function setAllowPaging($value)
+	{
+		$this->setViewState('AllowPaging',TPropertyValue::ensureBoolean($value),false);
+	}
+
+	/**
+	 * @return boolean whether the custom paging is enabled. Defaults to false.
+	 */
+	public function getAllowCustomPaging()
+	{
+		return $this->getViewState('AllowCustomPaging',false);
+	}
+
+	/**
+	 * Sets a value indicating whether the custom paging should be enabled.
+	 * When the pager is in custom paging mode, the {@link setVirtualItemCount VirtualItemCount}
+	 * property is used to determine the paging, and the data items in the
+	 * {@link setDataSource DataSource} are considered to be in the current page.
+	 * @param boolean whether the custom paging is enabled
+	 */
+	public function setAllowCustomPaging($value)
+	{
+		$this->setViewState('AllowCustomPaging',TPropertyValue::ensureBoolean($value),false);
+	}
+
+	/**
+	 * @return integer the zero-based index of the current page. Defaults to 0.
+	 */
+	public function getCurrentPageIndex()
+	{
+		return $this->getViewState('CurrentPageIndex',0);
+	}
+
+	/**
+	 * @param integer the zero-based index of the current page
+	 * @throws TInvalidDataValueException if the value is less than 0
+	 */
+	public function setCurrentPageIndex($value)
+	{
+		if(($value=TPropertyValue::ensureInteger($value))<0)
+			$value=0;
+		$this->setViewState('CurrentPageIndex',$value,0);
+	}
+
+	/**
+	 * @return integer the number of data items on each page. Defaults to 10.
+	 */
+	public function getPageSize()
+	{
+		return $this->getViewState('PageSize',10);
+	}
+
+	/**
+	 * @param integer the number of data items on each page.
+	 * @throws TInvalidDataValueException if the value is less than 1
+	 */
+	public function setPageSize($value)
+	{
+		if(($value=TPropertyValue::ensureInteger($value))<1)
+			throw new TInvalidDataValueException('databoundcontrol_pagesize_invalid',get_class($this));
+		$this->setViewState('PageSize',TPropertyValue::ensureInteger($value),10);
+	}
+
+	/**
+	 * @return integer number of pages of data items available
+	 */
+	public function getPageCount()
+	{
+		return $this->getViewState('PageCount',1);
+	}
+
+	/**
+	 * @return integer virtual number of data items in the data source. Defaults to 0.
+	 * @see setAllowCustomPaging
+	 */
+	public function getVirtualItemCount()
+	{
+		return $this->getViewState('VirtualItemCount',0);
+	}
+
+	/**
+	 * @param integer virtual number of data items in the data source.
+	 * @throws TInvalidDataValueException if the value is less than 0
+	 * @see setAllowCustomPaging
+	 */
+	public function setVirtualItemCount($value)
+	{
+		if(($value=TPropertyValue::ensureInteger($value))<0)
+			throw new TInvalidDataValueException('databoundcontrol_virtualitemcount_invalid',get_class($this));
+		$this->setViewState('VirtualItemCount',$value,0);
+	}
+
+	/**
+	 * Sets a value indicating whether a databind call is required by the data bound control.
+	 * If true and the control has been prerendered while it uses the data source
+	 * specified by {@link setDataSourceID}, a databind call will be called by this method.
+	 * @param boolean whether a databind call is required.
+	 */
+	protected function setRequiresDataBinding($value)
+	{
+		$value=TPropertyValue::ensureBoolean($value);
+		if($value && $this->_prerendered)
+		{
+			$this->_requiresDataBinding=true;
+			$this->ensureDataBound();
+		}
+		else
+			$this->_requiresDataBinding=$value;
+	}
+
+	/**
+	 * Ensures any pending {@link dataBind} is called.
+	 * This method calls {@link dataBind} if the data source is specified
+	 * by {@link setDataSourceID} or if {@link getRequiresDataBinding RequiresDataBinding}
+	 * is true.
+	 */
+	protected function ensureDataBound()
+	{
+		if($this->_requiresDataBinding && ($this->getUsingDataSourceID() || $this->_requiresBindToNull))
+		{
+			$this->dataBind();
+			$this->_requiresBindToNull=false;
+		}
+	}
+
+	/**
+	 * @return TPagedDataSource creates a paged data source
+	 */
+	protected function createPagedDataSource()
+	{
+		$ds=new TPagedDataSource;
+		$ds->setCurrentPageIndex($this->getCurrentPageIndex());
+		$ds->setPageSize($this->getPageSize());
+		$ds->setAllowPaging($this->getAllowPaging());
+		$ds->setAllowCustomPaging($this->getAllowCustomPaging());
+		$ds->setVirtualItemCount($this->getVirtualItemCount());
+		return $ds;
+	}
+
+	/**
+	 * Performs databinding.
+	 * This method overrides the parent implementation by calling
+	 * {@link performSelect} which fetches data from data source and does
+	 * the actual binding work.
+	 */
+	public function dataBind()
+	{
+		$this->setRequiresDataBinding(false);
+		$this->dataBindProperties();
+		$this->onDataBinding(null);
+
+		if(($view=$this->getDataSourceView())!==null)
+			$data=$view->select($this->getSelectParameters());
+		else
+			$data=null;
+
+		if($data instanceof Traversable)
+		{
+			if($this->getAllowPaging())
+			{
+				$ds=$this->createPagedDataSource();
+				$ds->setDataSource($data);
+				$this->setViewState('PageCount',$ds->getPageCount());
+				if($ds->getCurrentPageIndex()>=$ds->getPageCount())
+				{
+					$ds->setCurrentPageIndex($ds->getPageCount()-1);
+					$this->setCurrentPageIndex($ds->getCurrentPageIndex());
+				}
+				$this->performDataBinding($ds);
+			}
+			else
+			{
+				$this->clearViewState('PageCount');
+				$this->performDataBinding($data);
+			}
+		}
+		$this->setIsDataBound(true);
+		$this->onDataBound(null);
+	}
+
+	public function dataSourceViewChanged($sender,$param)
+	{
+		if(!$this->_ignoreDataSourceViewChanged)
+			$this->setRequiresDataBinding(true);
+	}
+
+	protected function getDataSourceView()
+	{
+		if(!$this->_currentViewValid)
+		{
+			if($this->_currentView && $this->_currentViewIsFromDataSourceID)
+				$this->_currentView->detachEventHandler('DataSourceViewChanged',array($this,'dataSourceViewChanged'));
+			if(($dataSource=$this->determineDataSource())!==null)
+			{
+				if(($view=$dataSource->getView($this->getDataMember()))===null)
+					throw new TInvalidDataValueException('databoundcontrol_datamember_invalid',$this->getDataMember());
+				if($this->_currentViewIsFromDataSourceID=$this->getUsingDataSourceID())
+					$view->attachEventHandler('OnDataSourceViewChanged',array($this,'dataSourceViewChanged'));
+				$this->_currentView=$view;
+			}
+			else
+				$this->_currentView=null;
+			$this->_currentViewValid=true;
+		}
+		return $this->_currentView;
+	}
+
+	protected function determineDataSource()
+	{
+		if(!$this->_currentDataSourceValid)
+		{
+			if(($dsid=$this->getDataSourceID())!=='')
+			{
+				if(($dataSource=$this->getNamingContainer()->findControl($dsid))===null)
+					throw new TInvalidDataValueException('databoundcontrol_datasourceid_inexistent',$dsid);
+				else if(!($dataSource instanceof IDataSource))
+					throw new TInvalidDataValueException('databoundcontrol_datasourceid_invalid',$dsid);
+				else
+					$this->_currentDataSource=$dataSource;
+			}
+			else if(($dataSource=$this->getDataSource())!==null)
+				$this->_currentDataSource=new TReadOnlyDataSource($dataSource,$this->getDataMember());
+			else
+				$this->_currentDataSource=null;
+			$this->_currentDataSourceValid=true;
+		}
+		return $this->_currentDataSource;
+	}
+
+	abstract protected function performDataBinding($data);
+
+	/**
+	 * Raises <b>OnDataBound</b> event.
+	 * This method should be invoked after a databind is performed.
+	 * It is mainly used by framework and component developers.
+	 */
+	public function onDataBound($param)
+	{
+		$this->raiseEvent('OnDataBound',$this,$param);
+	}
+
+	/**
+	 * Sets page's <b>OnPreLoad</b> event handler as {@link pagePreLoad}.
+	 * If viewstate is disabled and the current request is a postback,
+	 * {@link setRequiresDataBinding RequiresDataBinding} will be set true.
+	 * This method overrides the parent implementation.
+	 * @param TEventParameter event parameter
+	 */
+	public function onInit($param)
+	{
+		parent::onInit($param);
+		$page=$this->getPage();
+		$page->attachEventHandler('OnPreLoad',array($this,'pagePreLoad'));
+	}
+
+	/**
+	 * Sets {@link getInitialized} as true.
+	 * This method is invoked when page raises <b>PreLoad</b> event.
+	 * @param mixed event sender
+	 * @param TEventParameter event parameter
+	 */
+	public function pagePreLoad($sender,$param)
+	{
+		$this->_initialized=true;
+		$isPostBack=$this->getPage()->getIsPostBack();
+		if(!$isPostBack || ($isPostBack && (!$this->getEnableViewState(true) || !$this->getIsDataBound())))
+			$this->setRequiresDataBinding(true);
+	}
+
+	/**
+	 * Ensures any pending databind is performed.
+	 * This method overrides the parent implementation.
+	 * @param TEventParameter event parameter
+	 */
+	public function onPreRender($param)
+	{
+		$this->_prerendered=true;
+		$this->ensureDataBound();
+		parent::onPreRender($param);
+	}
+
+	/**
+	 * Validates if the parameter is a valid data source.
+	 * If it is a string or an array, it will be converted as a TList object.
+	 * @param Traversable|array|string data source to be validated
+	 * @return Traversable the data that is traversable
+	 * @throws TInvalidDataTypeException if the data is neither null nor Traversable
+	 */
+	protected function validateDataSource($value)
+	{
+		if(is_string($value))
+		{
+			$list=new TList;
+			foreach(TPropertyValue::ensureArray($value) as $key=>$value)
+			{
+				if(is_array($value))
+					$list->add($value);
+				else
+					$list->add(array($value,is_string($key)?$key:$value));
+			}
+			return $list;
+		}
+		else if(is_array($value))
+			return new TMap($value);
+		else if($value instanceof TDbDataReader) {
+			// read array from TDbDataReader since it's forward-only stream and can only be traversed once
+			return $value->readAll();
+		}
+		else if(($value instanceof Traversable) || $value===null)
+			return $value;
+		else
+			throw new TInvalidDataTypeException('databoundcontrol_datasource_invalid',get_class($this));
+	}
+
+	public function getDataMember()
+	{
+		return $this->getViewState('DataMember','');
+	}
+
+	public function setDataMember($value)
+	{
+		$this->setViewState('DataMember',$value,'');
+	}
+
+	public function getSelectParameters()
+	{
+		if(!$this->_parameters)
+			$this->_parameters=new TDataSourceSelectParameters;
+		return $this->_parameters;
+	}
+}
+
+
+/**
+ * TListItemType class.
+ * TListItemType defines the enumerable type for the possible types
+ * that databound list items could take.
+ *
+ * The following enumerable values are defined:
+ * - Header: header item
+ * - Footer: footer item
+ * - Item: content item (neither header nor footer)
+ * - Separator: separator between items
+ * - AlternatingItem: alternating content item
+ * - EditItem: content item in edit mode
+ * - SelectedItem: selected content item
+ * - Pager: pager
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id$
+ * @package System.Web.UI.WebControls
+ * @since 3.0.4
+ */
+class TListItemType extends TEnumerable
+{
+	const Header='Header';
+	const Footer='Footer';
+	const Item='Item';
+	const Separator='Separator';
+	const AlternatingItem='AlternatingItem';
+	const EditItem='EditItem';
+	const SelectedItem='SelectedItem';
+	const Pager='Pager';
+}
+
+
+/**
+ * IItemDataRenderer interface.
+ *
+ * IItemDataRenderer defines the interface that an item renderer
+ * needs to implement. Besides the {@link getData Data} property, a list item
+ * renderer also needs to provide {@link getItemIndex ItemIndex} and
+ * {@link getItemType ItemType} property.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id$
+ * @package System.Web.UI.WebControls
+ * @since 3.1.0
+ */
+interface IItemDataRenderer extends IDataRenderer
+{
+	/**
+	 * Returns a value indicating the zero-based index of the item in the corresponding data control's item collection.
+	 * If the item is not in the collection (e.g. it is a header item), it returns -1.
+	 * @return integer zero-based index of the item.
+	 */
+	public function getItemIndex();
+
+	/**
+	 * Sets the zero-based index for the item.
+	 * If the item is not in the item collection (e.g. it is a header item), -1 should be used.
+	 * @param integer zero-based index of the item.
+	 */
+	public function setItemIndex($value);
+
+	/**
+	 * @return TListItemType the item type.
+	 */
+	public function getItemType();
+
+	/**
+	 * @param TListItemType the item type.
+	 */
+	public function setItemType($value);
+}
+
+?>