diff options
Diffstat (limited to 'framework/Web/UI/WebControls/TPager.php')
-rw-r--r-- | framework/Web/UI/WebControls/TPager.php | 1582 |
1 files changed, 791 insertions, 791 deletions
diff --git a/framework/Web/UI/WebControls/TPager.php b/framework/Web/UI/WebControls/TPager.php index 8e4bf2b0..11de5233 100644 --- a/framework/Web/UI/WebControls/TPager.php +++ b/framework/Web/UI/WebControls/TPager.php @@ -1,792 +1,792 @@ -<?php
-/**
- * TPager class file.
- *
- * @author Qiang Xue <qiang.xue@gmail.com>
- * @link http://www.pradosoft.com/
+<?php +/** + * TPager class file. + * + * @author Qiang Xue <qiang.xue@gmail.com> + * @link http://www.pradosoft.com/ * @copyright Copyright © 2005-2012 PradoSoft - * @license http://www.pradosoft.com/license/
- * @version $Id$
- * @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.)
- *
- * 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>
- * @version $Id$
- * @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 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);
- 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);
- 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>
- * @version $Id$
- * @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>
- * @version $Id$
- * @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>
- * @version $Id$
- * @package System.Web.UI.WebControls
- * @since 3.0.4
- */
-class TPagerButtonType extends TEnumerable
-{
- const LinkButton='LinkButton';
- const PushButton='PushButton';
- const ImageButton='ImageButton';
-}
-
+ * @license http://www.pradosoft.com/license/ + * @version $Id$ + * @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.) + * + * 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> + * @version $Id$ + * @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 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); + 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); + 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> + * @version $Id$ + * @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> + * @version $Id$ + * @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> + * @version $Id$ + * @package System.Web.UI.WebControls + * @since 3.0.4 + */ +class TPagerButtonType extends TEnumerable +{ + const LinkButton='LinkButton'; + const PushButton='PushButton'; + const ImageButton='ImageButton'; +} + |